SNVSCT9A October   2024  â€“ February 2025 LM251772

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Device Comparison
  6. Pin Configuration and Functions
  7. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Buck-Boost Control Scheme
        1. 8.3.1.1 Buck Mode
        2. 8.3.1.2 Boost Mode
        3. 8.3.1.3 Buck-Boost Mode
      2. 8.3.2  Power Save Mode
      3. 8.3.3  Reference System
        1. 8.3.3.1 VIO LDO and nRST-PIN
      4. 8.3.4  Supply Voltage Selection – VSMART Switch and Selection Logic
      5. 8.3.5  Enable and Undervoltage Lockout
        1. 8.3.5.1 UVLO
      6. 8.3.6  Internal VCC Regulators
        1. 8.3.6.1 VCC1 Regulator
        2. 8.3.6.2 VCC2 Regulator
      7. 8.3.7  Error Amplifier and Control
        1. 8.3.7.1 Output Voltage Regulation
        2. 8.3.7.2 Output Voltage Feedback
        3. 8.3.7.3 Voltage Regulation Loop
        4. 8.3.7.4 Dynamic Voltage Scaling
      8. 8.3.8  Output Voltage Discharge
      9. 8.3.9  Peak Current Sensor
      10. 8.3.10 Short Circuit - Hiccup Protection
      11. 8.3.11 Current Monitor/Limiter
        1. 8.3.11.1 Overview
        2. 8.3.11.2 Output Current Limitation
        3. 8.3.11.3 Output Current Monitor
      12. 8.3.12 Oscillator Frequency Selection
      13. 8.3.13 Frequency Synchronization
      14. 8.3.14 Output Voltage Tracking
        1. 8.3.14.1 Analog Voltage Tracking
        2. 8.3.14.2 Digital Voltage Tracking
      15. 8.3.15 Slope Compensation
      16. 8.3.16 Configurable Soft Start
      17. 8.3.17 Drive Pin
      18. 8.3.18 Dual Random Spread Spectrum – DRSS
      19. 8.3.19 Gate Driver
      20. 8.3.20 Cable Drop Compensation (CDC)
      21. 8.3.21 CFG-pin and R2D Interface
      22. 8.3.22 Advanced Monitoring Features
        1. 8.3.22.1  Overview
        2. 8.3.22.2  BUSY
        3. 8.3.22.3  OFF
        4. 8.3.22.4  VOUT
        5. 8.3.22.5  IOUT
        6. 8.3.22.6  INPUT
        7. 8.3.22.7  TEMPERATURE
        8. 8.3.22.8  CML
        9. 8.3.22.9  OTHER
        10. 8.3.22.10 ILIM_OP
        11. 8.3.22.11 nFLT/nINT Pin Output
        12. 8.3.22.12 Status Byte
      23. 8.3.23 Protection Features
        1. 8.3.23.1  Thermal Shutdown (TSD)
        2. 8.3.23.2  Over Current Protection
        3. 8.3.23.3  Output Over Voltage Protection 1 (OVP1)
        4. 8.3.23.4  Output Over Voltage Protection 2 (OVP2)
        5. 8.3.23.5  Input Voltage Protection (IVP)
        6. 8.3.23.6  Input Voltage Regulation (IVR)
        7. 8.3.23.7  Power Good
        8. 8.3.23.8  Boot-Strap Under Voltage Protection
        9. 8.3.23.9  Boot-strap Over Voltage Clamp
        10. 8.3.23.10 CRC - CHECK
    4. 8.4 Device Functional Modes
      1. 8.4.1 Overview
      2. 8.4.2 Logic State Description
    5. 8.5 Programming
      1. 8.5.1 I2C Bus Operation
      2. 8.5.2 Clock Stretching
      3. 8.5.3 Data Transfer Formats
      4. 8.5.4 Single READ from a Defined Register Address
      5. 8.5.5 Sequential READ Starting from a Defined Register Address
      6. 8.5.6 Single WRITE to a Defined Register Address
      7. 8.5.7 Sequential WRITE Starting at a Defined Register Address
  10. LM251772 Registers
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1  Custom Design with WEBENCH Tools
        2. 10.2.2.2  Frequency
        3. 10.2.2.3  Feedback Divider
        4. 10.2.2.4  Inductor and Current Sense Resistor Selection
        5. 10.2.2.5  Output Capacitor
        6. 10.2.2.6  Input Capacitor
        7. 10.2.2.7  Slope Compensation
        8. 10.2.2.8  UVLO Divider
        9. 10.2.2.9  Soft-Start Capacitor
        10. 10.2.2.10 MOSFETs QH1 and QL1
        11. 10.2.2.11 MOSFETs QH2 and QL2
        12. 10.2.2.12 Loop Compensation
        13. 10.2.2.13 External Component Selection
      3. 10.2.3 Application Curves
    3. 10.3 Wireless Charging Supply
    4. 10.4 USB-PD Source with Power Path
    5. 10.5 Parallel (Multiphase) Operation
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

LM251772 Registers

Table 9-1 lists the memory-mapped registers for the LM251772 registers. All register offset addresses not listed in LM251772 Registers should be considered as reserved locations and the register contents should not be modified.

Table 9-1 LM251772 Registers
OffsetAcronymRegister NameSection
3hCLEAR_FAULTSCLEAR_FAULTSSection 9.1
AhILIM_THRESHOLDILIM_THRESHOLDSection 9.2
ChVOUT_TARGET1_LSBVOUT_TARGET1_LSBSection 9.3
DhVOUT_TARGET1_MSBVOUT_TARGET1_MSBSection 9.4
21hUSB_PD_STATUS_0USB_PD_STATUS_0Section 9.5
78hSTATUS_BYTESTATUS_BYTESection 9.6
81hUSB_PD_CONTROL_0USB_PD_CONTROL_0Section 9.7
D0hMFR_SPECIFIC_D0MFR_SPECIFIC_D0Section 9.8
D1hMFR_SPECIFIC_D1MFR_SPECIFIC_D1Section 9.9
D2hMFR_SPECIFIC_D2MFR_SPECIFIC_D2Section 9.10
D5hMFR_SPECIFIC_D5MFR_SPECIFIC_D5Section 9.11
D6hMFR_SPECIFIC_D6MFR_SPECIFIC_D6Section 9.12
D7hMFR_SPECIFIC_D7MFR_SPECIFIC_D7Section 9.13
D8hMFR_SPECIFIC_D8MFR_SPECIFIC_D8Section 9.14
DAhIVP_VOLTAGEIVP_VOLTAGESection 9.15

Complex bit access types are encoded to fit into small table cells. Table 9-2 shows the codes that are used for access types in this section.

Table 9-2 LM251772 Access Type Codes
Access TypeCodeDescription
Read Type
RRRead
Write Type
WWWrite
Reset or Default Value
-nValue after reset or the default value

9.1 CLEAR_FAULTS Register (Offset = 3h) [Reset = 00h]

CLEAR_FAULTS is shown in Table 9-3.

Return to the Summary Table.

clear all latched status flags

Table 9-3 CLEAR_FAULTS Register Field Descriptions
BitFieldTypeResetDescription
7-0CLEAR_FAULTSR0haccessing the address is enough to clear fault

9.2 ILIM_THRESHOLD Register (Offset = Ah) [Reset = 12h]

ILIM_THRESHOLD is shown in Table 9-4.

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Table 9-4 ILIM_THRESHOLD Register Field Descriptions
BitFieldTypeResetDescription
7-0ILIM_THRESHOLDR/W12hISNS current limit threshold voltage. Value in bracket considers a 10mOhms sens resistor

0h = 5mV (0.5 A)

1h = 5mV (0.5 A)

2h = 5mV (0.5 A)

3h = 5mV (0.5 A)

4h = 5mV (0.5 A)

5h = 5mV (0.5 A)

6h = 5mV (0.5 A)

7h = 5mV (0.5 A)

8h = 5mV (0.5 A)

9h = 5mV (0.5 A)

Ah = 5mV (0.5 A)

Bh = 5.5mV (0.55 A)

Ch = 6mV (0.6 A)

Dh = 6.5mV (0.65 A)

Eh = 7mV (0.7 A)

Fh = 7.5mV (0.75 A)

10h = 8mV (0.8 A)

11h = 8.5mV (0.85 A)

12h = 9mV (0.9 A)

13h = 9.5mV (0.95 A)

14h = 10mV (1 A)

15h = 10.5mV (1.05 A)

16h = 11mV (1.1 A)

17h = 11.5mV (1.15 A)

18h = 12mV (1.2 A)

19h = 12.5mV (1.25 A)

1Ah = 13mV (1.3 A)

1Bh = 13.5mV (1.35 A)

1Ch = 14mV (1.4 A)

1Dh = 14.5mV (1.45 A)

1Eh = 15mV (1.5 A)

1Fh = 15.5mV (1.55 A)

20h = 16mV (1.6 A)

21h = 16.5mV (1.65 A)

22h = 17mV (1.7 A)

23h = 17.5mV (1.75 A)

24h = 18mV (1.8 A)

25h = 18.5mV (1.85 A)

26h = 19mV (1.9 A)

27h = 19.5mV (1.95 A)

28h = 20mV (2 A)

29h = 20.5mV (2.05 A)

2Ah = 21mV (2.1 A)

2Bh = 21.5mV (2.15 A)

2Ch = 22mV (2.2 A)

2Dh = 22.5mV (2.25 A)

2Eh = 23mV (2.3 A)

2Fh = 23.5mV (2.35 A)

30h = 24mV (2.4 A)

31h = 24.5mV (2.45 A)

32h = 25mV (2.5 A)

33h = 25.5mV (2.55 A)

34h = 26mV (2.6 A)

35h = 26.5mV (2.65 A)

36h = 27mV (2.7 A)

37h = 27.5mV (2.75 A)

38h = 28mV (2.8 A)

39h = 28.5mV (2.85 A)

3Ah = 29mV (2.9 A)

3Bh = 29.5mV (2.95 A)

3Ch = 30mV (3 A)

3Dh = 30.5mV (3.05 A)

3Eh = 31mV (3.1 A)

3Fh = 31.5mV (3.15 A)

40h = 32mV (3.2 A)

41h = 32.5mV (3.25 A)

42h = 33mV (3.3 A)

43h = 33.5mV (3.35 A)

44h = 34mV (3.4 A)

45h = 34.5mV (3.45 A)

46h = 35mV (3.5 A)

47h = 35.5mV (3.55 A)

48h = 36mV (3.6 A)

49h = 36.5mV (3.65 A)

4Ah = 37mV (3.7 A)

4Bh = 37.5mV (3.75 A)

4Ch = 38mV (3.8 A)

4Dh = 38.5mV (3.85 A)

4Eh = 39mV (3.9 A)

4Fh = 39.5mV (3.95 A)

50h = 40mV (4 A)

51h = 40.5mV (4.05 A)

52h = 41mV (4.1 A)

53h = 41.5mV (4.15 A)

54h = 42mV (4.2 A)

55h = 42.5mV (4.25 A)

56h = 43mV (4.3 A)

57h = 43.5mV (4.35 A)

58h = 44mV (4.4 A)

59h = 44.5mV (4.45 A)

5Ah = 45mV (4.5 A)

5Bh = 45.5mV (4.55 A)

5Ch = 46mV (4.6 A)

5Dh = 46.5mV (4.65 A)

5Eh = 47mV (4.7 A)

5Fh = 47.5mV (4.75 A)

60h = 48mV (4.8 A)

61h = 48.5mV (4.85 A)

62h = 49mV (4.9 A)

63h = 49.5mV (4.95 A)

64h = 50mV (5 A)

65h = 50.5mV (5.05 A)

66h = 51mV (5.1 A)

67h = 51.5mV (5.15 A)

68h = 52mV (5.2 A)

69h = 52.5mV (5.25 A)

6Ah = 53mV (5.3 A)

6Bh = 53.5mV (5.35 A)

6Ch = 54mV (5.4 A)

6Dh = 54.5mV (5.45 A)

6Eh = 55mV (5.5 A)

6Fh = 55.5mV (5.55 A)

70h = 56mV (5.6 A)

71h = 56.5mV (5.65 A)

72h = 57mV (5.7 A)

73h = 57.5mV (5.75 A)

74h = 58mV (5.8 A)

75h = 58.5mV (5.85 A)

76h = 59mV (5.9 A)

77h = 59.5mV (5.95 A)

78h = 60mV (6 A)

79h = 60.5mV (6.05 A)

7Ah = 61mV (6.1 A)

7Bh = 61.5mV (6.15 A)

7Ch = 62mV (6.2 A)

7Dh = 62.5mV (6.25 A)

7Eh = 63mV (6.3 A)

7Fh = 63.5mV (6.35 A)

80h = 64mV (6.4 A)

81h = 64.5mV (6.45 A)

82h = 65mV (6.5 A)

83h = 65.5mV (6.55 A)

84h = 66mV (6.6 A)

85h = 66.5mV (6.65 A)

86h = 67mV (6.7 A)

87h = 67.5mV (6.75 A)

88h = 68mV (6.8 A)

89h = 68.5mV (6.85 A)

8Ah = 69mV (6.9 A)

8Bh = 69.5mV (6.95 A)

8Ch = 70mV (7 A)

8Dh = 70mV (7 A)

8Eh = 70mV (7 A)

8Fh = 70mV (7 A)

90h = 70mV (7 A)

91h = 70mV (7 A)

92h = 70mV (7 A)

93h = 70mV (7 A)

94h = 70mV (7 A)

95h = 70mV (7 A)

96h = 70mV (7 A)

97h = 70mV (7 A)

98h = 70mV (7 A)

99h = 70mV (7 A)

9Ah = 70mV (7 A)

9Bh = 70mV (7 A)

9Ch = 70mV (7 A)

9Dh = 70mV (7 A)

9Eh = 70mV (7 A)

9Fh = 70mV (7 A)

A0h = 70mV (7 A)

A1h = 70mV (7 A)

A2h = 70mV (7 A)

A3h = 70mV (7 A)

A4h = 70mV (7 A)

A5h = 70mV (7 A)

A6h = 70mV (7 A)

A7h = 70mV (7 A)

A8h = 70mV (7 A)

A9h = 70mV (7 A)

AAh = 70mV (7 A)

ABh = 70mV (7 A)

ACh = 70mV (7 A)

ADh = 70mV (7 A)

AEh = 70mV (7 A)

AFh = 70mV (7 A)

B0h = 70mV (7 A)

B1h = 70mV (7 A)

B2h = 70mV (7 A)

B3h = 70mV (7 A)

B4h = 70mV (7 A)

B5h = 70mV (7 A)

B6h = 70mV (7 A)

B7h = 70mV (7 A)

B8h = 70mV (7 A)

B9h = 70mV (7 A)

BAh = 70mV (7 A)

BBh = 70mV (7 A)

BCh = 70mV (7 A)

BDh = 70mV (7 A)

BEh = 70mV (7 A)

BFh = 70mV (7 A)

C0h = 70mV (7 A)

C1h = 70mV (7 A)

C2h = 70mV (7 A)

C3h = 70mV (7 A)

C4h = 70mV (7 A)

C5h = 70mV (7 A)

C6h = 70mV (7 A)

C7h = 70mV (7 A)

C8h = 70mV (7 A)

C9h = 70mV (7 A)

CAh = 70mV (7 A)

CBh = 70mV (7 A)

CCh = 70mV (7 A)

CDh = 70mV (7 A)

CEh = 70mV (7 A)

CFh = 70mV (7 A)

D0h = 70mV (7 A)

D1h = 70mV (7 A)

D2h = 70mV (7 A)

D3h = 70mV (7 A)

D4h = 70mV (7 A)

D5h = 70mV (7 A)

D6h = 70mV (7 A)

D7h = 70mV (7 A)

D8h = 70mV (7 A)

D9h = 70mV (7 A)

DAh = 70mV (7 A)

DBh = 70mV (7 A)

DCh = 70mV (7 A)

DDh = 70mV (7 A)

DEh = 70mV (7 A)

DFh = 70mV (7 A)

E0h = 70mV (7 A)

E1h = 70mV (7 A)

E2h = 70mV (7 A)

E3h = 70mV (7 A)

E4h = 70mV (7 A)

E5h = 70mV (7 A)

E6h = 70mV (7 A)

E7h = 70mV (7 A)

E8h = 70mV (7 A)

E9h = 70mV (7 A)

EAh = 70mV (7 A)

EBh = 70mV (7 A)

ECh = 70mV (7 A)

EDh = 70mV (7 A)

EEh = 70mV (7 A)

EFh = 70mV (7 A)

F0h = 70mV (7 A)

F1h = 70mV (7 A)

F2h = 70mV (7 A)

F3h = 70mV (7 A)

F4h = 70mV (7 A)

F5h = 70mV (7 A)

F6h = 70mV (7 A)

F7h = 70mV (7 A)

F8h = 70mV (7 A)

F9h = 70mV (7 A)

FAh = 70mV (7 A)

FBh = 70mV (7 A)

FCh = 70mV (7 A)

FDh = 70mV (7 A)

FEh = 70mV (7 A)

FFh = 70mV (7 A)

9.3 VOUT_TARGET1_LSB Register (Offset = Ch) [Reset = FFh]

VOUT_TARGET1_LSB is shown in Table 9-5.

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Table 9-5 VOUT_TARGET1_LSB Register Field Descriptions
BitFieldTypeResetDescription
7-0VOUT_AR/WFFhOutput target Voltage
Logical Register Vout Setting
Lower Limit: 3.3V or 1V depending on SEL__FB_DIV20
Upper Limit: 48V or 24 V depending on SEL__FB_DIV20
Step size: 20mV or 10mV depending on SEL__FB_DIV20
Value Calculation for 20mV
Value Calculation for 10mV

9.4 VOUT_TARGET1_MSB Register (Offset = Dh) [Reset = 00h]

VOUT_TARGET1_MSB is shown in Table 9-6.

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Table 9-6 VOUT_TARGET1_MSB Register Field Descriptions
BitFieldTypeResetDescription
7-4NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
3-0VOUT_AR/W0hOutput target Voltage
Logical Register Vout Setting
Lower Limit: 3.3V or 1V depending on SEL__FB_DIV20
Upper Limit: 48V or 24 V depending on SEL__FB_DIV20
Step size: 20mV or 10mV depending on SEL__FB_DIV20
Value Calculation for 20mV.
Value Calculation for 10mV.

9.5 USB_PD_STATUS_0 Register (Offset = 21h) [Reset = 00h]

USB_PD_STATUS_0 is shown in Table 9-7.

Return to the Summary Table.

USB-PD STATUS REGISTER

Table 9-7 USB_PD_STATUS_0 Register Field Descriptions
BitFieldTypeResetDescription
7NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
6CC_OPERATIONR0hInstantanous status for constant current (CC) ILIM operation
5.0 NIL R 0h This bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.

9.6 STATUS_BYTE Register (Offset = 78h) [Reset = 00h]

STATUS_BYTE is shown in Table 9-8.

Return to the Summary Table.

FAULT STATUS LOW BYTE

Table 9-8 STATUS_BYTE Register Field Descriptions
BitFieldTypeResetDescription
7BUSYR0hunit is busy
0h = unit not busy
1h = unit busy
6OFFR0hdevice not providing VOUT and/or unit is off
0h = unit on
1h = unit off
5VOUTR0hVOUT_OV fault
0h = no fault
1h = fault
4IOUTR0hIOUT_OC fault
0h = no fault
1h = fault
3INPUTR0hVIN_UV fault
0h = no fault
1h = fault
2TEMPERATURER0hTemperature fault or warning
0h = no fault
1h = fault
1CMLR0hComm, Logic, Memory event
0h = no fault
1h = fault
0OTHERR0hother fault or warning
0h = no fault
1h = fault

9.7 USB_PD_CONTROL_0 Register (Offset = 81h) [Reset = 00h]

USB_PD_CONTROL_0 is shown in Table 9-9.

Return to the Summary Table.

USB-PD CONTROL REGISTER

Table 9-9 USB_PD_CONTROL_0 Register Field Descriptions
BitFieldTypeResetDescription
7-2NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
1FORCE_DISCHR/W0hActivates Vo discharge
0h = DISABLE
1h = ENABLE
0CONV_EN2R/W0hEnables the power stage
0h = DISABLE
1h = ENABLE

9.8 MFR_SPECIFIC_D0 Register (Offset = D0h) [Reset = 32h]

MFR_SPECIFIC_D0 is shown in Table 9-10.

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CONFIG_0 Device Configuration Register 0

Table 9-10 MFR_SPECIFIC_D0 Register Field Descriptions
BitFieldTypeResetDescription
7NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
6EN_NEG_CL_LIMITR/W0hEnables ILIM for negative current limit, If disabled ILIM clamps pos I_L
0h = DISABLE
1h = ENABLE
5EN_VCC1R/W1hEnables the VCC1 auxiliary LDO
0h = DISABLE
1h = ENABLE
4IMON_LIMITER_ENR/W1hEnables the Imon in limiter configuration
0h = DISABLE
1h = ENABLE
3HICCUP_ENR/W0hEnables Hiccup short circuit
0h = DISABLE
1h = ENABLE
2DRSS_ENR/W0hEnables Dual Spread Spectrum
0h = DISABLE
1h = ENABLE
1USLEEP_ENR/W1hEnables micro sleep mode
0h = DISABLE
1h = ENABLE
0CONV_ENR/W0hEnables the power stage
0h = DISABLE
1h = ENABLE

9.9 MFR_SPECIFIC_D1 Register (Offset = D1h) [Reset = 19h]

MFR_SPECIFIC_D1 is shown in Table 9-11.

Return to the Summary Table.

CONFIG_1 Device Configuration Register 1

Table 9-11 MFR_SPECIFIC_D1 Register Field Descriptions
BitFieldTypeResetDescription
7EN_THER_WARNR/W0hEnables Thermal Warning
0h = DISABLE
1h = ENABLE
6-5THW_THRESHOLDR/W0hSelects the Thermal Warning Threshold
0h = 140degC
1h = 125degC
2h = 110degC
3h = 95degC
4EN_NINTR/W1hConigures the nFLT pin handler to act as interupt pin or nFLT pin
0h = DISABLE
1h = ENABLE
3EN_DTRK_STARTOVERR/W1hEnables a direct start-up if DTRK is enabled without waiting for the DTRK PWM signal
0h = DISABLE
1h = ENABLE
2FORCE_BIASPINR/W0hEnables the priroty to supply VCC2 from BIAS by lowering the threshold.
0h = DISABLE
1h = ENABLE
1EN_BB_2P_FPWMR/W0hEnables 2phase BB swiching in fPWM mode
0h = DISABLE
1h = ENABLE
0EN_BB_2P_PSMR/W1hEnables 2phase BB swiching in PSM mode
0h = DISABLE
1h = ENABLE

9.10 MFR_SPECIFIC_D2 Register (Offset = D2h) [Reset = 7Ah]

MFR_SPECIFIC_D2 is shown in Table 9-12.

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Table 9-12 MFR_SPECIFIC_D2 Register Field Descriptions
BitFieldTypeResetDescription
7NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
6EN_ACTIVE_DVSR/W1hEnables the active down ramp for DVS using the discharge
0h = DISABLE
1h = ENABLE
5-4DVS_SLEW_RAMPR/W3hSets the positive and negative Vo slew rate for DVS
0h = 40mV/us
1h = 20mV/us
2h = 1mV/us
3h = 0.5mV/us
3-2DISCHARGE_STRENGTHR/W2hSets the discharge current for the Vo discharge
0h = SLOW (25mA)
1h = MEDIUM (50mA)
2h = FAST (75mA)
3h = FAST (75mA)
1DISCHARGE_CONFIG0R/W1hSelects the discharge together with CONV_EN
0h = DISABLE
1h = ENABLE
0DISCHARGE_CONFIG1R/W0hSelects the discharge until the VTH DISCH
0h = DISABLE
1h = ENABLE

9.11 MFR_SPECIFIC_D5 Register (Offset = D5h) [Reset = 3Fh]

MFR_SPECIFIC_D5 is shown in Table 9-13.

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Table 9-13 MFR_SPECIFIC_D5 Register Field Descriptions
BitFieldTypeResetDescription
7-6NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
5-0V_OVP2R/W3FhOVP2 threshold voltage

0h = 4.00V

1h = 4.500V

2h = 5.000V

3h = 5.500V

4h = 6.000V

5h = 6.500V

6h = 7.000V

7h = 7.500V

8h = 8.000V

9h = 8.500V

Ah = 9.000V

Bh = 9.500V

Ch = 10.000V

Dh = 10.500V

Eh = 11.000V

Fh = 11.500V

10h = 12.000V

11h = 12.500V

12h = 13.000V

13h = 13.500V

14h = 14.000V

15h = 14.500V

16h = 15.000V

17h = 15.500V

18h = 16.000V

19h = 17.000V

1Ah = 18.000V

1Bh = 19.000V

1Ch = 20.000V

1Dh = 21.000V

1Eh = 22.000V

1Fh = 23.000V

20h = 24.000V

21h = 25.000V

22h = 26.000V

23h = 27.000V

24h = 28.000V

25h = 29.000V

26h = 30.000V

27h = 31.000V

28h = 32.000V

29h = 33.000V

2Ah = 34.000V

2Bh = 35.000V

2Ch = 36.000V

2Dh = 37.000V

2Eh = 38.000V

2Fh = 39.000V

30h = 40.000V

31h = 41.000V

32h = 42.000V

33h = 43.000V

34h = 44.000V

35h = 45.000V

36h = 46.000V

37h = 47.000V

38h = 48.000V

39h = 49.000V

3Ah = 50.000V

3Bh = 51.000V

3Ch = 52.000V

3Dh = 53.000V

3Eh = 54.000V

3Fh = 55.000V

9.12 MFR_SPECIFIC_D6 Register (Offset = D6h) [Reset = 15h]

MFR_SPECIFIC_D6 is shown in Table 9-14.

Return to the Summary Table.

PS_Config0 Power stage Configuration

Table 9-14 MFR_SPECIFIC_D6 Register Field Descriptions
BitFieldTypeResetDescription
7-6CONFIG_SYNC_PINR/W0hSelects the SYNC function to mainain paralell operation
0h = Input sync on rising edge
1h = Input sync on falling edge
2h = Sync output from internal rising edge
3h = Sync output from internal falling edge (180deg phase)
5EN_CONST_TDEADR/W0hForces a constant deadtime for the setting of SEL_MIN_DEADTIME_GDRV. Disables frequnecy dependency of min Tdead
0h = DISABLE
1h = ENABLE
4SEL_SCALE_DTR/W1hScales the gate driver dead time freq dependence and 2 MHz setpoint
0h = DISABLE
1h = ENABLE
3-2SEL_MIN_DEADTIME_GDRVR/W1hDefines the minimum dead time at fsw = 2Mhz for the gate driver
0h = 10 ns (No delay)
1h = 20 ns
2h = 40 ns
3h = 60 ns
1-0BB_MIN_TIME_OFFSETR/W1hScales the BB min Ton or Toff time for the gate refresh
0h = 0.75 x
1h = 1 x
2h = 1.25 x
3h = 1.5 x

9.13 MFR_SPECIFIC_D7 Register (Offset = D7h) [Reset = 28h]

MFR_SPECIFIC_D7 is shown in Table 9-15.

Return to the Summary Table.

Table 9-15 MFR_SPECIFIC_D7 Register Field Descriptions
BitFieldTypeResetDescription
7-6NILR0hThis bit is not implemented in hardware. During write operations data for this bit is ignored. During read operations 0 is returned.
5-4SEL_INDUC_DERATER/W2hSelect the inductor de-rating for PSM mode to slope
0h = DISABLE
1h = 20%
2h = 30%
3h = 40%
3-0SEL_SLOPE_COMPR/W8hSelect slope comp current, as ratio of RT current

0h = 0.125

1h = 0.25

2h = 0.375

3h = 0.5

4h = 0.625

5h = 0.75

6h = 0.875

7h = 1

8h = 1.5

9h = 2

Ah = 2.5

Bh = 3

Ch = 3.5

Dh = 4

Eh = 4.5

Fh = 5

9.14 MFR_SPECIFIC_D8 Register (Offset = D8h) [Reset = 84h]

MFR_SPECIFIC_D8 is shown in Table 9-16.

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Table 9-16 MFR_SPECIFIC_D8 Register Field Descriptions
BitFieldTypeResetDescription
7SEL_FB_DIV20R/W1hSelect internal FB divider ratio of 20
0h = DIV10
1h = DIV20
6EN_CDCR/W0hEnables the cable drop compensation
0h = DISABLE
1h = ENABLE
5-4CDC_GAINR/W0hSelectes the Gain for the CDC voltage (1V) with respect to Vout
0h = 0.250V
1h = 0.500V
2h = 1.000V
3h = 2.000V
3-2SEL_DRV1_SEQR/W1hSelect the sequencing for the DRV 1 operation
0h = Pull-Low/ CP running if converter operation is off
1h = Pull-Low/ CP running if converter operation is on
2h = FORCE ACTIVE
3h = FORCE OFF
1-0SEL_DRV1_SUPR/W0hSelect the driver configuration for DRV1 pin
0h = Open Drain (active = pull low)
1h = Vout
2h = VBIAS
3h = VCC2 (Charge Pump driver)

9.15 IVP_VOLTAGE Register (Offset = DAh) [Reset = FFh]

IVP_VOLTAGE is shown in Table 9-17.

Return to the Summary Table.

Table 9-17 IVP_VOLTAGE Register Field Descriptions
BitFieldTypeResetDescription
7-0V_IVPR/WFFhInput Overvoltage Protection and Regulatoin Threshold:

0h = 4.75V

1h = 4.875V

2h = 5.000V

3h = 5.125V

4h = 5.250V

5h = 5.375V

6h = 5.500V

7h = 5.625V

8h = 5.750V

9h = 5.875V

Ah = 6.000V

Bh = 6.125V

Ch = 6.250V

Dh = 6.375V

Eh = 6.500V

Fh = 6.625V

10h = 6.750V

11h = 6.875V

12h = 7.000V

13h = 7.125V

14h = 7.250V

15h = 7.375V

16h = 7.500V

17h = 7.625V

18h = 7.750V

19h = 7.875V

1Ah = 8.000V

1Bh = 8.125V

1Ch = 8.250V

1Dh = 8.375V

1Eh = 8.500V

1Fh = 8.625V

20h = 8.750V

21h = 8.875V

22h = 9.000V

23h = 9.125V

24h = 9.250V

25h = 9.375V

26h = 9.500V

27h = 9.625V

28h = 9.750V

29h = 9.875V

2Ah = 10.000V

2Bh = 10.125V

2Ch = 10.250V

2Dh = 10.375V

2Eh = 10.500V

2Fh = 10.625V

30h = 10.750V

31h = 10.875V

32h = 11.000V

33h = 11.125V

34h = 11.250V

35h = 11.375V

36h = 11.500V

37h = 11.625V

38h = 11.750V

39h = 11.875V

3Ah = 12.000V

3Bh = 12.125V

3Ch = 12.250V

3Dh = 12.375V

3Eh = 12.500V

3Fh = 12.625V

40h = 12.750V

41h = 12.875V

42h = 13.000V

43h = 13.125V

44h = 13.250V

45h = 13.375V

46h = 13.500V

47h = 13.625V

48h = 13.750V

49h = 13.875V

4Ah = 14.000V

4Bh = 14.125V

4Ch = 14.250V

4Dh = 14.375V

4Eh = 14.500V

4Fh = 14.625V

50h = 14.750V

51h = 14.875V

52h = 15.000V

53h = 15.125V

54h = 15.250V

55h = 15.375V

56h = 15.500V

57h = 15.625V

58h = 15.750V

59h = 15.875V

5Ah = 16.000V

5Bh = 16.125V

5Ch = 16.250V

5Dh = 16.375V

5Eh = 16.500V

5Fh = 16.625V

60h = 16.750V

61h = 16.875V

62h = 17.000V

63h = 17.125V

64h = 17.250V

65h = 17.375V

66h = 17.500V

67h = 17.625V

68h = 17.750V

69h = 17.875V

6Ah = 18.000V

6Bh = 18.125V

6Ch = 18.250V

6Dh = 18.375V

6Eh = 18.500V

6Fh = 18.625V

70h = 18.750V

71h = 18.875V

72h = 19.000V

73h = 19.125V

74h = 19.250V

75h = 19.375V

76h = 19.500V

77h = 19.625V

78h = 19.750V

79h = 19.875V

7Ah = 20.000V

7Bh = 20.125V

7Ch = 20.250V

7Dh = 20.375V

7Eh = 20.500V

7Fh = 20.625V

80h = 20.750V

81h = 20.875V

82h = 21.000V

83h = 21.125V

84h = 21.250V

85h = 21.375V

86h = 21.500V

87h = 21.625V

88h = 21.750V

89h = 21.875V

8Ah = 22.000V

8Bh = 22.125V

8Ch = 22.250V

8Dh = 22.375V

8Eh = 22.500V

8Fh = 22.625V

90h = 22.750V

91h = 22.875V

92h = 23.000V

93h = 23.125V

94h = 23.250V

95h = 23.500V

96h = 23.750V

97h = 24.000V

98h = 24.250V

99h = 24.500V

9Ah = 24.750V

9Bh = 25.000V

9Ch = 25.250V

9Dh = 25.500V

9Eh = 25.750V

9Fh = 26.000V

A0h = 26.250V

A1h = 26.500V

A2h = 26.750V

A3h = 27.000V

A4h = 27.250V

A5h = 27.500V

A6h = 27.750V

A7h = 28.000V

A8h = 28.250V

A9h = 28.500V

AAh = 28.750V

ABh = 29.000V

ACh = 29.250V

ADh = 29.500V

AEh = 29.750V

AFh = 30.000V

B0h = 30.250V

B1h = 30.500V

B2h = 30.750V

B3h = 31.000V

B4h = 31.250V

B5h = 31.500V

B6h = 31.750V

B7h = 32.000V

B8h = 32.250V

B9h = 32.500V

BAh = 32.750V

BBh = 33.000V

BCh = 33.250V

BDh = 33.500V

BEh = 33.750V

BFh = 34.000V

C0h = 34.250V

C1h = 34.500V

C2h = 34.750V

C3h = 35.000V

C4h = 35.250V

C5h = 35.500V

C6h = 35.750V

C7h = 36.000V

C8h = 36.250V

C9h = 36.500V

CAh = 36.750V

CBh = 37.000V

CCh = 37.250V

CDh = 37.500V

CEh = 37.750V

CFh = 38.000V

D0h = 38.250V

D1h = 38.500V

D2h = 38.750V

D3h = 39.000V

D4h = 39.250V

D5h = 39.500V

D6h = 39.750V

D7h = 40.000V

D8h = 40.250V

D9h = 40.500V

DAh = 40.750V

DBh = 41.000V

DCh = 41.250V

DDh = 41.500V

DEh = 41.750V

DFh = 42.000V

E0h = 42.250V

E1h = 42.500V

E2h = 42.750V

E3h = 43.000V

E4h = 43.250V

E5h = 43.500V

E6h = 43.750V

E7h = 44.000V

E8h = 44.250V

E9h = 44.500V

EAh = 44.750V

EBh = 45.000V

ECh = 45.250V

EDh = 45.500V

EEh = 45.750V

EFh = 46.000V

F0h = 46.250V

F1h = 46.500V

F2h = 46.750V

F3h = 47.000V

F4h = 47.250V

F5h = 47.500V

F6h = 47.750V

F7h = 48.000V

F8h = 48.250V

F9h = 48.500V

FAh = 48.750V

FBh = 49.000V

FCh = 49.250V

FDh = 49.500V

FEh = 49.750V

FFh = 50.000V