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TPS76633DR

250mA LDO, 3.3V fixed, 2.5-16V input, 230mV dropout, 55uA IQ, PG output, SOIC-8

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Pieza del fabricante：

TPS76633DR

Paquete：

SOIC-8 (4.9x6mm)

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Descripción

Productos

The Texas Instruments TPS76633DR is a 250 mA, ultra-low IQ, low-dropout voltage regulator with a fixed 3.3 V output. It features a Power Good (PG) output, enable pin, and operates from 2.5 V to 16 V input, making it suitable for a wide range of power management applications.

Especificaciones

Output Voltage 3.3 V (fixed)
Max Output Current 250 mA
Input Voltage 2.5 V to 16 V
Dropout Voltage 230 mV typ @ 250 mA
Corriente de reposo 55 µA typ (no load)
PSRR >70 dB @ 1 kHz
Temperatura de funcionamiento -40°C to +125°C
Paquete SOIC-8 (4.9x6mm)

Características

  • Ultra-low 55 µA quiescent current
  • 230 mV typical dropout at 250 mA
  • Power Good (PG) open-drain output
  • Enable (EN) pin for shutdown control
  • Internal 750 µs soft start
  • Overcurrent and thermal protection

Aplicaciones

  • MCU and processor power supply
  • SiC gate driver bias supply
  • Microphone bias
  • Post-regulation after DC-DC
  • Transformer secondary supply

The TPS76633DR is a 250 mA low-dropout (LDO) linear voltage regulator from Texas Instruments with a fixed 3.3 V output. It features an ultra-low quiescent current of 55 µA typical, a low dropout voltage of 230 mV at full 250 mA load, and a wide input voltage range of 2.5 V to 16 V. The device includes a Power Good (PG) open-drain output for supply monitoring, an enable (EN) pin for shutdown control, and internal soft start. Overcurrent limit and thermal shutdown provide robust fault protection.

The TPS76633DR uses a PMOS pass element to achieve low dropout voltage. The error amplifier compares a fraction of the output voltage (via an internal resistor divider for the fixed 3.3V version) with an internal reference, driving the PMOS gate to maintain regulation. The PG comparator monitors the output and asserts the PG flag when output is within regulation. The enable pin controls the pass element gate directly. Thermal shutdown and current limit circuits protect the device under fault conditions.

Pin Nombre Tipo Descripción
1 ES Entrada Enable (active high)
2 EN Potencia Input supply
3 OUT Salida Regulated 3.3V output
4 NC - Not connected
5 GND Suelo Suelo
6 NC - Not connected
7 NC - Not connected
8 PG Salida Power Good (open drain)
  • MCU and processor local power supply
  • SiC gate driver bias regulation
  • Microphone bias supply
  • Post-regulation after DC-DC converter
  • Transformer secondary winding regulation
Modelo Fabricante Diferencia clave
TPS76633DCQR TI SOT-223-6 package option
TLV1117-33 TI 800mA, higher dropout
AMS1117-3.3 AMS 1A, higher dropout alternative
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