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TPS62842DGR

Buck Converter, 60nA Iq, 1.8-6.5V, 750mA, VSSOP-8

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Manufacturer Part：

TPS62842DGR

Package：

VSSOP-8 (3.0 x 3.0 x 1.0 mm)

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Description

Product Overview

The TPS62842DGR from Texas Instruments is a 60nA ultra-low Iq buck converter with 1.8-6.5V input, 750mA output, and DCS-Control in a VSSOP-8 package.

Key Specifications

Type Ultra-Low Iq Step-Down DC-DC Converter
Input Voltage 1.8 V to 6.5 V
Output Voltage Adjustable (0.8V to VIN)
Output Current 750 mA
Quiescent Current (Iq) 60 nA (typical, standby)
Switching Frequency 1.8 MHz (typical)
Control Mode DCS-Control
Efficiency Up to 90%
Package VSSOP-8 (3.0 x 3.0 mm)
Operating Temperature -40C to +125C

Features

  • 60 nA ultra-low quiescent current
  • 1.8V to 6.5V wide input range
  • 750mA output current
  • DCS-Control for fast transient response
  • 1.8 MHz fixed switching frequency
  • Enable pin for shutdown control
  • Power good output

Applications

  • Battery-powered IoT devices
  • Energy harvesting systems
  • Always-on power rails
  • Wearable electronics

The TPS62842DGR from Texas Instruments is an ultra-low quiescent current step-down DC-DC converter designed for battery-powered applications that spend most of their time in sleep mode. The 60 nA quiescent current in standby mode is among the lowest in the industry, extending battery life by months or years in always-on systems. The device supports input voltages from 1.8V to 6.5V (covering single-cell Li-ion and 2-4 cell alkaline), with output current up to 750mA for peak processing loads. The DCS-Control (Direct Control with Seamless transition) architecture provides fast transient response with seamless transition between PWM and PFM modes. The 1.8 MHz switching frequency minimizes inductor size. The VSSOP-8 package provides a compact footprint suitable for space-constrained wearable and IoT designs.

The TPS62842DGR uses TI’s DCS-Control architecture, which combines voltage-mode control with a direct feedback path for fast transient response. In PWM mode (medium to heavy loads), the converter operates at a fixed 1.8 MHz frequency with pulse-width modulation for low output ripple. In light-load conditions, the converter transitions seamlessly to PFM (Pulse Frequency Modulation) mode, where switching pulses are issued only when the output voltage drops below the threshold, minimizing switching losses. In deep sleep mode (output current near zero), the 60 nA Iq is achieved by shutting down all non-essential internal circuits while maintaining the output voltage regulation through infrequent single pulses. The DCS-Control uses the output voltage ripple as a natural ramp for the comparator, eliminating the need for external compensation and providing a direct path from output to the PWM comparator for sub-microsecond transient response. The integrated synchronous rectifier replaces the external Schottky diode, improving efficiency especially at low output voltages.

Pin Name Type Function
1 EN Input Enable (HIGH=on, LOW=shutdown)
2 VIN Power Input supply (1.8-6.5V)
3 SW Output Switch node (inductor connection)
4 GND Power Ground
5 FB Input Feedback voltage (0.6V reference)
6 PG Output Power good indicator
7 MODE Input Mode selection (PFM/Force-PWM)
8 VOS Output Output voltage sense (DCS-Control)
  • IoT sensor node with 10-year coin cell life using 60nA standby current
  • Energy harvesting system with 1.8V minimum input from solar cell
  • Wearable health monitor with Li-po battery and always-on 1.8V rail
  • Smart meter with decade-long battery life requirement and 750mA peak load
Manufacturer Part Number Package Notes
TI TPS62840DGR VSSOP-8 60V input, 300mA, ultra-low Iq
TI TPS62843DGR VSSOP-8 Fixed output version, 60nA Iq
ADI LT8609IMSE TSSOP-16 42V, 2A, 2.5uA Iq (higher)
Richtek RT9069GQW DFN-8 5.5V, 300mA, 1uA Iq
Monolithic Power MP28167GD-0000 QFN-8 6V, 600mA, low Iq
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