SLVSGB5 August   2022 TPS56C231

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  PWM Operation and D-CAP3 Control Mode
      2. 7.3.2  Eco-mode Control
      3. 7.3.3  4.7-V LDO
      4. 7.3.4  MODE Selection
      5. 7.3.5  Soft Start and Prebiased Soft Start
      6. 7.3.6  Enable and Adjustable UVLO
      7. 7.3.7  Power Good
      8. 7.3.8  Overcurrent Protection and Undervoltage Protection
      9. 7.3.9  UVLO Protection
      10. 7.3.10 Thermal Shutdown
      11. 7.3.11 Output Voltage Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Operation
      2. 7.4.2 Standby Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Component Selection
          1. 8.2.2.1.1 Output Voltage Set Point
          2. 8.2.2.1.2 Switching Frequency and MODE Selection
          3. 8.2.2.1.3 Inductor Selection
          4. 8.2.2.1.4 Output Capacitor Selection
          5. 8.2.2.1.5 Input Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RNN|18
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics

TJ = –40°C to +125°C, VIN = 12 V (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
IIN VIN supply current TJ = 25°C, VEN = 5 V, non-switching 146 µA
IVINSDN VIN shutdown current VEN = 0 V 9.3 µA
LOGIC THRESHOLD
VENH EN H-level threshold voltage 1.175 1.225 1.3 V
VENL EN L-level threshold voltage 1.025 1.104 1.15 V
VENHYS 0.121 V
IENp1 EN pullup current VEN = 1.0 V 0.35 1.91 2.95 µA
IENp2 VEN = 1.3 V 3 4.197 5.5 µA
FEEDBACK VOLTAGE
VFB FB voltage TJ  = 25°C 598 600 602 mV
TJ = 0°C to 85°C 597.5 600 602.5 mV
TJ = –40°C to 85°C 594 600 602.5 mV
TJ = –40°C to 125°C 594 600 606 mV
LDO VOLTAGE
VREG5 LDO output voltage TJ = –40°C to 125°C 4.58 4.7 4.83 V
ILIM5 LDO output current limit TJ = –40°C to 125°C 100 150 200 mA
UVLO
UVLO UVLO threshold VREG5 rising voltage 4.25 V
VREG5 falling voltage 3.52 V
VREG5 hysteresis 730 mV
UVLO, VREG5 = 4.7 V UVLO threshold, VREG5 = 4.7 V VIN rising voltage, VREG5 = 4.7 V 3.32 V
VIN falling voltage, VREG5 = 4.7 V 3.24 V
VIN hysteresis, VREG5 = 4.7 V 80 mV
MOSFET
RDS(on)H High-side switch resistance TJ = 25°C, VVREG5 = 4.7 V 7.8 mΩ
RDS(on)L Low-side switch resistance TJ = 25°C, VVREG5 = 4.7 V 3.2 mΩ
ON-TIME TIMER CONTROL
tON min SW minimum on time(1) VIN = 17 V, VOUT  = 0.6 V, fSW = 1200 kHz 60 ns
tOFF SW minimum off time VFB  = 0.5 V 310 ns
SOFT START AND OUTPUT DISCHARGE
tSS Soft-start time Internal soft start time, TJ = –40°C to 125°C 1.2 ms
Iss Soft-start charge current TJ = –40°C to 125°C 4.9 6 7.1 µA
RDIS Discharge resistance TJ  = 25°C, VOUT = 0.5 V, VEN = 0 V 370 Ω
CURRENT LIMIT
IOCL TPS56C231 current limit (low-side sourcing) ILIM-1 option, valley current 12 14.7 16.8 A
ILIM option, valley current 14 17 19.2 A
TPS56C231L current limit (low-side sourcing) ILIM-1 option, valley current 9.775 11.5 13.225 A
ILIM option, valley current 11.73 13.8 15.87 A
INOCL TPS56C231 current limit (low-side negative) Valley current 4.9 A
TPS56C231L current limit (low-side negative) Valley current 4 A
POWER GOOD
VPGOODTH PGOOD threshold VFB falling (fault) 84%
VFB rising (good) 93%
VFB rising (fault) 116%
VFB falling (good) 108%
tPGOODLY PGOOD delay time Delay from low to high 128 µs
Delay form high to low 14 µs
VPG_L PGOOD sink current IOL = 4 mA 0.4 V
IPGLK PGOOD leak current VPGOOD = 5.5 V 1 uA
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVP Output OVP threshold OVP detect 121%
TOVPDEL Output OVP response delay 52 µs
VUVP Output UVP threshold Hiccup detect 70%
tUVPDGL UVP prop deglitch 1 ms
tUVPDEL Output hiccup delay relative to SS time UVP detect 1 cycle
tUVPEN Output hiccup enable delay relative to SS time UVP detect 7 cycle
THERMAL SHUTDOWN
TSDN Thermal shutdown threshold(1) Shutdown temperature 160 °C
Hysteresis 15 °C
(1) Not production tested