SLVSAF7C September   2010  – April 2019 TPS61251

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Device Options
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 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 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Current Limit Operation
      2. 9.3.2 Soft Start
      3. 9.3.3 Enable
      4. 9.3.4 Undervoltage Lockout (UVLO)
      5. 9.3.5 Power Good
      6. 9.3.6 Input Overvoltage Protection
      7. 9.3.7 Load Disconnect and Reverse Current Protection
      8. 9.3.8 Thermal Regulation
      9. 9.3.9 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Save Mode
      2. 9.4.2 Snooze Mode
      3. 9.4.3 100% Duty-Cycle Mode
  10. 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 Output Voltage Setting
        3. 10.2.2.3 Average Input Current Limit
        4. 10.2.2.4 Maximum Output Current
        5. 10.2.2.5 Inductor Selection
        6. 10.2.2.6 Output Capacitor
        7. 10.2.2.7 Input Capacitor
        8. 10.2.2.8 Checking Loop Stability
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Consideration
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Development Support
      1. 13.2.1 Custom Design With WEBENCH® Tools
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resource
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

8.5 Electrical Characteristics

Over recommended free air temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for condition VIN = EN = 3.6 V, VOUT = 5.5 V.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VFB Feedback voltage 1.182 1.2 1.218 V
Maximum line regulation 2.3 V ≤ VIN ≤ 6 V 0.5%
Maximum load regulation 0.5%
f Oscillator frequency 3500 kHz
rDS(on) High side switch ON resistance 200 mΩ
Low side switch ON resistance 130 mΩ
Reverse leakage current into VOUT EN = GND 3.5 µA
IIN(DC) Programmable input average switch current limit ILIM pin set to VIN 1500 mA
ILIM pin set to GND 100 mA
RILIM = 20 kΩ (500 mA) –10% 10%
IQ Quiescent current PFM enabled, device is not switching 30 µA
SNOOZE mode, IOUT = 0 mA, current into VIN pin 2
ISD Shutdown current(1) VIN turned on when EN is connected to GND and no voltage is present at VOUT 0.85 3.5 μA
OVP Input over voltage protection threshold Falling 6.4 V
Rising 6.5
CONTROL STAGE
VUVLO Under voltage lockout threshold Falling 2 2.1 V
Hysteresis 0.1 V
VIL EN input low voltage 2.3 V ≤ VIN ≤ 6 V 0.4 V
VIH EN input high voltage 2.3 V ≤ VIN ≤ 6 V 1 V
EN, PG input leakage current Clamped on GND or VIN 0.5 µA
Power Good threshold voltage Rising referred to VFB 92.5% 95% 97.5%
Falling referred to VOUT 2.3 V
Power good delay 50 µs
Overtemperature protection 140 °C
Overtemperature hysteresis 20 °C
(1) When the power good threshold is triggered the first time a comparator is turned on to observe the output voltage increasing the shutdown current.