TPSM82843X中文资料德州仪器数据手册PDF规格书

1 Features

• 1.8V to 5.5V input voltage range

• 0.4V to 3.6V output voltage range

• 600mA output current

• Output discharge

• 275nA typical quiescent current, 4nA shutdown

• Zero losses from eliminating output divider

• 1% accurate voltage selection with single resistor

on VSET-pin

– TPSM828436: 0.4V to 0.8V

– TPSM828437: 0.8V to 1.8V

– TPSM828438: 1.8V to 3.6V

• Cost and size optimized passive components

– Down to 4.7μF CIN and COUT

– 0402 and 0201 capacitors supported

• Low output voltage ripple in power save mode

• RF-friendly and fast transient DCS-Control

• Automatic transition to no ripple 100% mode

• Small QFN package with 2.45mm × 2.70mm ×

1.27mm

2 Applications

• Bluetooth® low energy BTLE remote controls,

wireless sensors, beacons

• IoT Wi-Fi® battery driven nodes

• Smart meter, heat meter, telemetry

• Datalogger, predictive maintenance

• Programmable logic controller (PLC) point of load

• Wearable electronics

• Headsets, headphones, and earbuds

• Hearing aid

3 Description

The high efficiency TPSM82843x step-down converter

family supports an ultra-low typical operating

quiescent current of 275nA and a typical shutdown

current of only 4nA. The inductor is integrated into the

QFN package improving ease of use and reducing

the bill of material down to only three passive

components.

The RF-friendly device uses DCS-Control for a low

output voltage ripple. The device is designed to

power wireless applications like Wi-Fi or Bluetooth.

The device switches at 1.5MHz and has high

efficiency even at light load current down to 10μA

for long battery life and easy thermal management.

Humidity, temperature or vibration have no influence

on the output voltage accuracy due to the integrated

feedback divider. Therefore, the device is also

an excellent choice for industrial point of load

applications.

18 pre-defined output voltages per part number with

1% accuracy selected through a 1% resistor on the

VSET pin support a large variety of applications.