SLVSGS7C July   2023  – April 2024 TPSM8287A06 , TPSM8287A12 , TPSM8287A15

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fixed-Frequency DCS-Control Topology
      2. 7.3.2  Forced-PWM and Power-Save Modes
      3. 7.3.3  Precise Enable
      4. 7.3.4  Start-Up
      5. 7.3.5  Switching Frequency Selection
      6. 7.3.6  Output Voltage Setting
        1. 7.3.6.1 Output Voltage Setpoint
        2. 7.3.6.2 Output Voltage Range
        3. 7.3.6.3 Non-Default Output Voltage Setpoint
        4. 7.3.6.4 Dynamic Voltage Scaling (DVS)
      7. 7.3.7  Compensation (COMP)
      8. 7.3.8  Mode Selection / Clock Synchronization (MODE/SYNC)
      9. 7.3.9  Spread Spectrum Clocking (SSC)
      10. 7.3.10 Output Discharge
      11. 7.3.11 Undervoltage Lockout (UVLO)
      12. 7.3.12 Overvoltage Lockout (OVLO)
      13. 7.3.13 Overcurrent Protection
        1. 7.3.13.1 Cycle-by-Cycle Current Limiting
        2. 7.3.13.2 Hiccup Mode
        3. 7.3.13.3 Current-Limit Mode
      14. 7.3.14 Power Good (PG)
        1. 7.3.14.1 Power-Good Standalone, Primary Device Behavior
        2. 7.3.14.2 Power-Good Secondary Device Behavior
      15. 7.3.15 Remote Sense
      16. 7.3.16 Thermal Warning and Shutdown
      17. 7.3.17 Stacked Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset (POR)
      2. 7.4.2 Undervoltage Lockout
      3. 7.4.3 Standby
      4. 7.4.4 On
    5. 7.5 Programming
      1. 7.5.1 Serial Interface Description
      2. 7.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 7.5.3 I2C Update Sequence
      4. 7.5.4 I2C Register Reset
  9. 8 Device Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Selecting the Input Capacitors
        2. 9.2.2.2 Selecting the Target Loop Bandwidth
        3. 9.2.2.3 Selecting the Compensation Resistor
        4. 9.2.2.4 Selecting the Output Capacitors
        5. 9.2.2.5 Selecting the Compensation Capacitor, CComp1
        6. 9.2.2.6 Selecting the Compensation Capacitor, CComp2
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application Using Four TPSM8287Axx in Parallel Operation
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
        1. 9.3.2.1 Selecting the Input Capacitors
        2. 9.3.2.2 Selecting the Target Loop Bandwidth
        3. 9.3.2.3 Selecting the Compensation Resistor
        4. 9.3.2.4 Selecting the Output Capacitors
        5. 9.3.2.5 Selecting the Compensation Capacitor, CComp1
        6. 9.3.2.6 Selecting the Compensation Capacitor, CComp2
      3. 9.3.3 Application Curves
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
  • RDW|39
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8 Device Registers

Table 8-1 lists the Device registers. All register addresses not listed in Table 8-1 must be considered as reserved locations and the register contents must not be modified.

Table 8-1 Device Registers
AddressAcronymRegister NameSection
0hVSETOutput Voltage SetpointGo
1hCONTROL1Control 1Go
2hCONTROL2Control 2Go
3hCONTROL3Control 3Go
4hSTATUSStatusGo

Complex bit access types are encoded to fit into small table cells. Table 8-2 shows the codes that are used for access types in this section.

Table 8-2 Device Access Type Codes
Access TypeCodeDescription
Read Type
RRRead
Write Type
WWWrite
Reset or Default Value
- nValue after reset or the default value

8.1 VSET Register (Address = 0h) [Reset = X]

VSET is shown in Figure 8-1 and described in Table 8-3.

Return to the Summary Table.

This register controls the output voltage setpoint

Figure 8-1 VSET Register
76543210
VSET
R/W-X
Table 8-3 VSET Register Field Descriptions
BitFieldTypeResetDescription
7-0VSETR/WXOutput voltage setpoint (see also the range-setting bits in the CONTROL2 register).
Range 1: Output voltage setpoint = 0.4 V + VSET[7:0] × 1.25 mV
Range 2: Output voltage setpoint = 0.4 V + VSET[7:0] × 2.5 mV
Range 3: Output voltage setpoint = 0.4 V + VSET[7:0] × 5 mV
Range 4: Output voltage setpoint = 0.8 V + VSET[7:0] × 10 mV
The state of the VSETx pins during power up determines the reset value.

(See Table 7-2).

8.2 CONTROL1 Register (Address = 1h) [Reset = 2Ah]

CONTROL1 is shown in Figure 8-2 and described in Table 8-4.

Return to the Summary Table.

This register controls various device configuration options

Figure 8-2 CONTROL1 Register
76543210
RESETSSCENSWENFPWMENDISCHENHICCUPENVRAMP
R/W-0bR/W-0bR/W-1bR/W-0bR/W-1bR/W-0bR/W-10b
Table 8-4 CONTROL1 Register Field Descriptions
BitFieldTypeResetDescription
7RESETR/W0bReset device.
0b = No effect
1b = Resets all registers to the default values.

The device then performs another initialization.
Reading this bit always returns 0.

6SSCENR/W0b Spread spectrum clocking enable.
0b = SSC operation disabled
1b = SSC operation enabled
5SWENR/W1bSoftware enable.
0b = Switching disabled (register values retained)
1b = Switching enabled (without the enable delay td(EN)1)
4FPWMENR/W0b Forced-PWM enable.
0b = Power-save operation enabled
1b = Forced-PWM operation enabled
This bit is logically ORed with the MODE/SYNC pin: If a high level or a synchronization clock is applied to the the MODE/SYNC pin, the device operates in Forced-PWM, regardless of the state of this bit.
3DISCHENR/W1b Output discharge enable.
0b = Output discharge disabled.
1b = Output discharge enabled.
2HICCUPENR/W0b Hiccup operation enable.
0b = Hiccup operation disabled
1b = Hiccup operation enabled. Do not enable Hiccup operation during stacked operation
1-0VRAMPR/W10b Output voltage ramp speed when changing from one output voltage setting to another.
00b = 10 mV/µs
01b = 5 mV/µs
10b = 1.25 mV/µs
11b = 0.5 mV/µs

8.3 CONTROL2 Register (Address = 2h) [Reset = X]

CONTROL2 is shown in Figure 8-3 and described in Table 8-5.

Return to the Summary Table.

This register controls various device configuration options

Figure 8-3 CONTROL2 Register
76543210
RESERVEDVRANGESSTIME
R-0000bR/W-XR/W-01b
Table 8-5 CONTROL2 Register Field Descriptions
BitFieldTypeResetDescription
7-4RESERVEDR0000b Reserved for future use. To make sure compatibility with future device variants, program these bits to 0.
3-2VRANGER/WXOutput voltage range.
00b = 0.4 V to 0.71875 V in 1.25-mV steps
01b = 0.4 V to 1.0375 V in 2.5-mV steps
10b = 0.4 V to 1.675 V in 5-mV steps
11b = 0.8 V to 3.35 V in 10-mV steps.

The state of the VSETx pins during power up determines the reset value. See Table 7-2.

1-0SSTIMER/W01b Soft-start ramp time.
00b = 0.5 ms
01b = 1 ms
10b = 2 ms
11b = 4 ms

8.4 CONTROL3 Register (Address = 3h) [Reset = 0h]

CONTROL3 is shown in Figure 8-4 and described in Table 8-6.

Return to the Summary Table.

This register controls various device configuration options

Figure 8-4 CONTROL3 Register
76543210
RESERVEDSINGLEPGBLNKDVS
R-000000bR/W-0bR/W-0b
Table 8-6 CONTROL3 Register Field Descriptions
BitFieldTypeResetDescription
7-2RESERVEDR000000b Reserved for future use. To make sure compatibility with future device variants, program these bits to 0.
1SINGLER/W0bSingle operation. This bit controls the internal EN pulldown and SYNC_OUT functions.
0b = EN pin pulldown and SYNC_OUT enabled.


1b = EN pin pulldown and SYNC_OUT disabled. Do not use during stacked operation. In standalone operation, increases IQ_VIN by 200 μA typical.

0PGBLNKDVSR/W0b Power-good blanking during DVS.
0b = PG pin reflects the output of the window comparator
1b = PG pin is high impedance during DVS

8.5 STATUS Register (Address = 4h) [Reset = 2h]

STATUS is shown in Figure 8-5 and described in Table 8-7.

Return to the Summary Table.

This register returns the device status flags

Figure 8-5 STATUS Register
76543210
RESERVEDHICCUPILIMTWARNTSHUTPBUVPBOV
R-00bR-0bR-0bR-0bR-0bR-1bR-0b
Table 8-7 STATUS Register Field Descriptions
BitFieldTypeResetDescription
7-6RESERVEDR00b Reserved for future use. To make sure compatibility with future device variants, ignore these bits.
5HICCUPR0b Hiccup. This bit reports whether a hiccup event occurred since the last time the STATUS register was read.
0b = No hiccup event occurred
1b = A hiccup event occurred
4ILIMR0bCurrent limit. This bit reports whether a current limit event occurred since the last time the STATUS register was read.
0b = No current limit event occurred
1b = A current limit event occurred
3TWARNR0b Thermal warning. This bit reports whether a thermal warning event occurred since the last time the STATUS register was read.
0b = No thermal warning event occurred
1b = A thermal warning event occurred
2TSHUTR0b Thermal shutdown. This bit reports whether a thermal shutdown event occurred since the last time the STATUS register was read.
0b = No thermal shutdown event occurred
1b = A thermal shutdown event occurred
1PBUVR1b Power-bad undervoltage. This bit reports whether a power-bad event (output voltage too low) occurred since the last time the STATUS register was read.
0b = No power-bad undervoltage event occurred
1b = A power-bad undervoltage event occurred
0PBOVR0b Power-bad overvoltage. This bit reports whether a power-bad event (output voltage too high) occurred since the last time the STATUS register was read.
0b = No power-bad overvoltage event occurred
1b = A power-bad overvoltage event occurred