TPS62840 60-nA IQ, 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter | TI.com

TPS62840 (ACTIVE) 60-nA IQ, 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter

 

Description

The TPS62840 is a high efficiency step-down converter with ultra-low operating quiescent current of typically 60 nA. The device contains special circuitry to achieve just 150 nA IQ in 100% mode to further extend battery life near the end of discharge.

The device uses DCS-Control to cleanly power radios and operates with a typical switching frequency of 1.8 MHz. In Power-Save Mode the device extends the light load efficiency down to a load current range of 1-µA and below.

16 predefined output voltages can be selected by connecting a resistor to pin VSET, making the device flexible for various applications with a minimum amount of external components.

The device’s STOP pin immediately eliminates any switching noise in order to take a noise-free measurement in test & measurement systems.

The TPS6284x provides an output current of up to 750 mA. With an input voltage of 1.8 V to 6.5 V, the device supports multiple power sources such as 2S to 4S Alkaline, 1S to 2S Li-MnO2 or 1S Li-Ion/Li-SoCl2.

Features

  • 60-nA operating quiescent current
  • 100% duty-cycle mode with 150-nA IQ
  • Input voltage range VIN from 1.8 V to 6.5 V
  • Output current up to 750 mA
  • RF friendly DCS-Control™
  • 80% efficiency at 1 µA IOUT (3.6 VIN to 1.8 VOUT)
  • 16 selectable output voltages via VSET pin
  • Auto transition PFM/PWM or forced-PWM mode
  • Selectable forced PWM and STOP modes
  • Output discharge function
  • 20-nA shutdown current
  • SON-8, WCSP-6 and HVSSOP-8 packages

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Part Number
  Min   Max Range
Vin  V
Vout  V
Iout  A
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)
TPS62840 Order now 1.8     6.5     0.8     3.6     0.75     1     1800     1800     0.00006     Enable
Fixed Output
Forced PWM
Light Load Efficiency
Output Discharge
Over Current Protection
Soft Start Fixed
Synchronous Rectification
UVLO Fixed    
DCS-Control     100     -40 to 125     Catalog     DSBGA | 6
VSON-HR | 8    
Converter     6DSBGA: 1 mm2: 1.4 x 1 (DSBGA | 6)
8VSON-HR: 3 mm2: 1.5 x 2 (VSON-HR | 8)    
TPS62740 Order now 2.2     5.5     1.8     3.3     0.3     1     2000     2000     0.0003     Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     WSON | 12     Converter     12WSON: 6 mm2: 3 x 2 (WSON | 12)    
TPS62743 Order now 2     5.5     1.2     3.3     0.3     1     1200     1200     0.0003     Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     DSBGA | 8     Converter     See datasheet (DSBGA)    
TPS62745 Order now 3.3     10     1.8     3.3     0.3     1     2500     2500     0.0004     Adaptive/Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Power Good
Soft Start Fixed
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 125     Catalog     WSON | 12     Converter     12WSON: 6 mm2: 3 x 2 (WSON | 12)    
TPS62808 Order now 1.8     5.5     1.8     3.3     0.6       1500     1500     0.0023     Enable
Forced PWM
Light Load Efficiency
Output Discharge
Over Current Protection
Synchronous Rectification
UVLO Fixed    
DCS-Control     100     -40 to 125