SLVSEA0B january   2018  – june 2023 TPS61280D , TPS61280E , TPS61281D

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Description (continued)
  7. 6 Device Comparison Table
  8. 7 Pin Configuration and Functions
  9. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 I2C Interface Timing Characteristics #GUID-BD85FD7C-B9AF-4F5D-9DFF-CD61365A592A/SLVS5401494
    7. 8.7 I2C Timing Diagrams
    8. 8.8 Typical Characteristics
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Voltage Scaling Management (VSEL)
      2. 9.3.2 Spread Spectrum, PWM Frequency Dithering
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Save Mode
      2. 9.4.2 Pass-Through Mode
      3. 9.4.3 Mode Selection
      4. 9.4.4 Current Limit Operation
      5. 9.4.5 Start-Up and Shutdown Mode
      6. 9.4.6 Undervoltage Lockout
      7. 9.4.7 Thermal Shutdown
      8. 9.4.8 Fault State and Power-Good
    5. 9.5 Programming
      1. 9.5.1 Serial Interface Description (TPS61280D/E)
      2. 9.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 9.5.3 HS-Mode Protocol
      4. 9.5.4 TPS6128xD/E I2C Update Sequence
    6. 9.6 Register Maps
      1. 9.6.1  Slave Address Byte
      2. 9.6.2  Register Address Byte
      3. 9.6.3  I2C Registers, E2PROM, Write Protect
      4. 9.6.4  E2PROM Configuration Parameters
      5. 9.6.5  CONFIG Register [reset = 0x01]
      6. 9.6.6  VOUTFLOORSET Register [reset = 0x02]
      7. 9.6.7  VOUTROOFSET Register [reset = 0x03]
      8. 9.6.8  ILIMSET Register [reset = 0x04]
      9. 9.6.9  Status Register [reset = 0x05]
      10. 9.6.10 E2PROMCTRL Register [reset = 0xFF]
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 TPS61281D with 2.5V-4.35 VIN, 1500 mA Output Current (TPS61280D with default I2C Configuration)
        1. 10.2.1.1 Design Requirement
        2. 10.2.1.2 Detailed Design Parameters
          1. 10.2.1.2.1 Inductor Selection
          2. 10.2.1.2.2 Output Capacitor
          3. 10.2.1.2.3 Input Capacitor
          4. 10.2.1.2.4 Checking Loop Stability
        3. 10.2.1.3 Application Performance Curves
      2. 10.2.2 TPS61282D with 2.5V-4.35 VIN, 2000 mA Output Current (TPS61280D with I2C Programmable)
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedures
        3. 10.2.2.3 Application Performance Curves
  12. 11Power Supply Recommendations
  13. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Information
  14. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Support Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  15. 14Mechanical, Packaging, and Orderable Information
    1. 14.1 Package Summary

Package Options

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

8.5 Electrical Characteristics

Minimum and maximum values are at VIN = 2.3 V to 4.85 V, VOUT = 3.4 V (or VIN, whichever is higher), EN = 1.8 V, VSEL = 1.8 V, nBYP = 1.8 V, –40°C ≤ TJ ≤ 125°C; Circuit of Parameter Measurement Information section (unless otherwise noted). Typical values are at VIN = 3.2 V, VOUT = 3.4 V, EN = 1.8 V, TJ = 25°C (unless otherwise noted).
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLY CURRENT
IQOperating quiescent current
into VIN		TPS6128xD/EDC/DC boost mode. Device not switching
IOUT = 0 mA, VIN = 3.2 V, VOUT = 3.4 V		–40°C ≤ TJ ≤ 85°C47.465.6µA
Pass-through mode (auto)
EN = 1.8 V, BYP = 1.8 V, VIN = 3.6 V		27.442.6µA
Pass-through mode (forced)
EN = 1.8 V, BYP = AGND, VOUT = 3.6 V		15.425.6µA
Operating quiescent current
into VOUT		DC/DC boost mode. Device not switching
IOUT = 0 mA, VIN = 3.2 V, VOUT = 3.4 V		8.919.6µA
ISDShutdown currentTPS6128xD/EEN = 0 V, BYP = 0 V, VIN = 3.6 V36.6μA
EN = 0 V, BYP = 1.8 V, VIN = 3.6 V8.920.6μA
VUVLOUnder-voltage lockout thresholdTPS6128xD/EFalling22.1V
Hysteresis0.1V
EN, VSEL, nBYP, MODE, SDA, SCL, GPIO, PG
VILLow-level input voltageTPS6128xD0.4V
VIHHigh-level input voltage1.2V
VIL Low-level input voltage TPS61280E 0.36 V
VIH High-level input voltage 0.84 V
VOLLow-level output voltage (SDA)TPS61280DIOL = 8 mA0.3V
Low-level output voltage (GPIO)IOL = 8 mA, GPIOCFG = 00.3V
Low-level output voltage (PG)TPS6128xD/EIOL = 8 mA0.3V
RPDEN, VSEL, BYP,
pull-down resistance		TPS6128xD/EInput ≤ 0.4 V300kΩ
CINEN, VSEL, BYP, MODE, PG
input capacitance		TPS6128xD/EInput connected to AGND or VIN9pF
SDA, SCL, GPIO input capacitanceTPS61280D9pF
VTHPGPower good thresholdTPS6128xD/ERising VOUT0.95 x VOUT
Falling VOUT0.9 x VOUT
IlkgInput leakage currentTPS6128xD/EInput connected to AGND–40°C ≤ TJ ≤ 85°C0µA
Input connected VIN0.5µA
OUTPUT
VOUT(TH)Threshold DC voltage accuracyTPS6128xD/ENo load. Open loop-1.5%1.5%
VOUTRegulated DC voltage accuracyTPS6128xD/E2.65 V ≤ VIN ≤ VOUT_TH - 150 mV
IOUT = 0mA
PWM operation.		-2%2%
2.65 V ≤ VIN ≤ VOUT_TH - 150 mV
IOUT = 0 mA
PFM/PWM operation		-2%4%
ΔVOUTPower-save mode
output ripple voltage		TPS6128xD/EPFM operation, IOUT = 1 mA30mVpk
PWM mode output ripple voltagePWM operation, IOUT = 500 mA15mVpk
POWER SWITCH
rDS(on)Low-side switch MOSFET
on resistance		TPS6128xD/EVIN = 3.2 V, VOUT = 3.5 V4580mΩ
High-side rectifier MOSFET
on resistance		VIN = 3.2 V, VOUT = 3.5 V4070mΩ
High-side pass-through MOSFET
on resistance		VIN = 3.2 V3560mΩ
IlkgReverse leakage current into SWTPS6128xD/EEN = AGND, VIN = VOUT = SW = 3.5 V
–40°C ≤ TJ ≤ 85°C		0.12µA
Reverse leakage current into VOUTEN = BYP = VIN, VIN = 2.9 V, VOUT = 4.4 V, VSW = 0 V
device not switching
–40°C ≤ TJ ≤ 85°C		0.112µA
ISINKVOUT sink capabilityTPS6128xD/EEN = AGND, VOUT ≤ 3.6 V,IOUT = -10 mA0.3V
Valley inductor current limitTPS61280D
TPS61281D		VIN = 2.9 V, VOUT = 3.5 V, –40°C ≤ TJ ≤ 125°C, auto PFM/PWM247530003525mA
Valley inductor current limitTPS61282DVIN = 2.9 V, VOUT = 3.5 V, –40°C ≤ TJ ≤ 125°C, auto PFM/PWM330040004700mA
Valley inductor current limit TPS61280E VIN = 2.9 V, VOUT = 3.4 V, –40°C ≤ TJ ≤ 125°C, auto PFM/PWM 4300 5000 6200 mA
Pass through mode current limitTPS6128xD/EEN = BYP = GND, VIN = 3.2 V5000mA
EN = VIN, BYP = don't care , VIN = 3.2 V560074009100mA
Pre-charge mode current limit
(linear mode, phase 1)		TPS6128xD/EVIN - VOUT >= 300 mV500650mA
Pre-charge mode current limit
(linear mode, phase 2)		2000mA
OSCILLATOR
fOSCOscillator frequencyTPS6128xD/EVIN = 2.7 V, VOUT = 3.5 V2.3MHz
THERMAL SHUTDOWN, HOT DIE DETECTOR
Thermal shutdown(1)TPS6128xD/E140160°C
Hot die detector accuracy(1)TPS61280D-1010510°C
TIMING
Start-up timeTPS6128xD/EVIN = 3.2 V, VOUT_TH = 01011 (3.4 V), RLOAD = 50 Ω
Time from active VIN to VOUT settled		500µs
GPIO rise time(1)TPS61280D200ns
(1) Specified by characterization. Not tested in production.