SLVSD27B June   2015  – March 2021 TPS62746

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 DCS-Control™
      2. 8.3.2 Power Save Mode Operation
      3. 8.3.3 1mA VIN Switch
      4. 8.3.4 Output Voltage Selection
      5. 8.3.5 Output Voltage Discharge of the Buck Converter
      6. 8.3.6 Undervoltage Lockout UVLO
      7. 8.3.7 Short circuit protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Shutdown
      2. 8.4.2 Device Start-up and Softstart
      3. 8.4.3 Automatic Transition Into No Ripple 100% Mode
  9. 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 Inductor Selection
        2. 9.2.2.2 Output Capacitor Selection
        3. 9.2.2.3 Input Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YFP|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.5 Electrical Characteristics

VIN = 3.6V, TA = –40°C to 85°C typical values are at TA = 25°C (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLY
IQOperating quiescent currentEN = VIN, CTRL = GND, IOUT = 0µA, VOUT = 1.8V, device not switching3601800nA
EN = VIN, IOUT = 0mA, CTRL = GND, VOUT = 1.8V , device switching460
ISDShutdown currentEN = GND, shutdown current into VIN701000nA
VTH_UVLO+Undervoltage lockout thresholdRising VIN2.0752.15V
VTH_UVLO-Falling VIN1.9252
INPUTS (EN, VSEL, CTRL)
VIH THHigh level input threshold2.2V ≤ VIN ≤ 5.5V1.1V
VIL THLow level input threshold2.2V ≤ VIN ≤ 5.5V0.4V
IINInput bias Current1025nA
POWER SWITCHES
RDS(ON)High side MOSFET on-resistanceIOUT = 50mA0.451.12Ω
Low Side MOSFET on-resistance0.220.65
ILIMFHigh side MOSFET switch current limit480600720mA
590650800
Low side MOSFET switch current limitTPS62743600
TPS627431650
OUTPUT VOLTAGE DISCHARGE
RDSCH_VOSMOSFET on-resistanceEN = GND, IVOS = -10mA into VOS pin3065Ω
IIN_VOSBias current into VOS pinEN = VIN, VOUT = 2V401010nA
INPUT VOLTAGE SWITCH (VINSW)
RRDSONMOSFET on-resistanceIVINSW = 1mA, CTRL = VIN, VIN = 2.1V150Ω
IINSW_LEAKAGEVIN-switch leakageCTRL = GND, leakage fron VIN to VINSW when pulled to GND25nA
IINSWVIN-switch current536mA
AUTO 100% MODE TRANSITION
VTH_100+Auto 100% Mode leave detection threshold (1)Rising VIN,100% Mode is left with VIN = VOUT + VTH_100+150250350mV
VTH_100-Auto 100% Mode enter detection threshold (1)Falling VIN, 100% Mode is entered with VIN = VOUT + VTH_100-85200290
OUTPUT
ILIM_softstartHigh side softstart switch current limitEN=low to high80150200mA
Low side softstart switch current limit150
VOUTOutput voltage rangeOutput voltages are selected with pins VSEL1.21.8 V
Output voltage accuracyIOUT = 10mA, VOUT = 1.8V-2.50%2.5
IOUT = 100mA, VOUT = 1.8V–20%2
DC output voltage load regulationVOUT = 1.8V0.001%/mA
DC output voltage line regulationVOUT = 1.8V, IOUT = 100mA, 2.2V ≤ VIN ≤ 5.0V0%/V
(1) VIN is compared to the programmed output voltage (VOUT). When VIN–VOUT falls below VTH_100- the device enters 100% Mode by turning the high side MOSFET on. The 100% Mode is exited when VIN–VOUT exceeds VTH_100+ and the device starts switching. The hysteresis for the 100% Mode detection threshold VTH_100+ - VTH_100- will always be positive and will be approximately 50 mV(typ)