TPS62770 Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP | TI.com

TPS62770 (ACTIVE) Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP

 

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Description

The TPS62770 is a tiny power solution for wearable applications including a 370nA ultra low Iq step-down converter, a slew rate controlled load switch and a dual mode step-up converter. The output voltage of the step-down converter can be selected with three VSEL pins between 1.0 V, 1.05 V, 1.1 V, 1.2 V, 1.8 V, 1.9 V, 2.0 V and 3.0 V. The output voltage can be changed during operation. In shutdown mode, the output of the step-down converter is pulled to GND. The integrated load switch is internally connected to the output of the step-down converter and features slew rate control during turn on phase. Once turned off, its output is connected to GND.

The dual mode step-up converter can generate a constant output voltage up to 15 V, such as PMOLED supply; or, a constant output current, such as LED back light supply. The output voltage can be adjusted up to 15 V with external resistors, or set to fixed 12 V by connecting the FB pin to VIN. The device features an internal over voltage protection of 17.7 V in case the FB node is left open or tight to GND. It includes an internal rectifier and load disconnect function. When used as constant output current driver, the device offers a PWM to analog converter to scale down the reference voltage according to the duty cycle of the PWM signal.

The device is available in a small 16pin 0.4mm pitch WCSP package.

Features

  • VIN Range 2.5 V to 5.5 V
  • 370 nA Iq Step-Down Converter
    • 8 Selectable Output Voltages (1.0V to 3.0V)
    • 300 mA Output Current
    • Output Discharge Function
  • Slew Rate Controlled Load Switch with Discharge
    Function
  • Dual Mode Step-Up Converter
    • Load Disconnect
    • Constant Output Voltage Adjustable up to 15 V
      (VFB 0.8 V) / 12 V Fixed
    • LED Current Driver with PWM to Current
      Conversion (max VFB Voltage 200 mV @ D =
      100%)
  • Tiny 16pin 1.58 × 1.58mm WCSP Package 0.4mm
    pitch

WEBENCH ® Designer TPS62770

  Min   Max Range
Vin -  V 2.5 to 5.5V
 
Vout1  V 1.00 to 3.00V
Iout1  A ≤ 0.30A
 
Vout2  V 4.50 to 16.00V
Iout2  A ≤ 0.15A
 
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS62770 Order now 2.5     5.5     1     15     0.3     2     1200     2000     0.00037     Adaptive/Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Over Current Protection
Soft Start Fixed
Synchronous Rectification
UVLO Fixed    
DCS-Control     100     -40 to 85     Catalog     DSBGA | 16     Converter     See datasheet (DSBGA)