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TPS7A0533PDQNR

200mA LDO, 3.3V fixed, 1uA IQ, X2SON-4, ultra-low power

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Manufacturer Part：

TPS7A0533PDQNR

Package：

X2SON-4 (DQN), 1.0 x 1.0 mm

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Description

Product Overview

The TPS7A0533PDQNR from Texas Instruments is an ultra-low IQ, 200mA low-dropout (LDO) voltage regulator in a tiny X2SON-4 (1.0 x 1.0 mm) package. It provides a fixed 3.3V output with 1% accuracy and features an ultra-low quiescent current of 1 µA, making it ideal for battery-powered applications where extending battery life is critical.

Key Specifications

Output Voltage 3.3V (fixed)
Output Current 200 mA
Input Voltage Range 1.4V to 5.5V
Dropout Voltage 235 mV max @ 200 mA
Quiescent Current (IQ) 1 µA typical, 3 µA max
Output Accuracy 1% typical, 3% max
Operating Temperature -40°C to +125°C
Package X2SON-4 (DQN), 1.0 x 1.0 mm

Features

  • Ultra-low quiescent current: 1 µA typical
  • 200 mA output current with 6 µA ground current
  • Excellent transient response
  • Active output discharge when disabled
  • Foldback current limit protection
  • Stable with 0.47 µF or larger output capacitor
  • Enable pin for power sequencing

Applications

  • Battery-powered IoT sensors and wearables
  • Portable medical devices
  • Smart meters and building automation
  • Single-cell Li-ion and Li-primary battery systems
  • Always-on power rails in low-power designs

The TPS7A0533PDQNR is an ultra-small, ultra-low quiescent current LDO regulator from Texas Instruments that sources 200 mA with excellent transient performance. The fixed 3.3V output version features 1% typical accuracy and an IQ of just 1 µA, significantly extending battery life in always-on applications. The device operates from a 1.4V to 5.5V input range, making it compatible with single-cell Li-ion and Li-primary batteries as well as two to three alkaline cells. The X2SON-4 package occupies just 1 mm² of board area.

The TPS7A0533PDQNR uses a PMOS pass transistor in a series-regulator topology. An internal bandgap reference provides a stable voltage that is compared against a divided version of the output. The error amplifier drives the PMOS gate to maintain regulation. The ultra-low 1 µA IQ is achieved through a specialized bias circuit that minimizes quiescent current while maintaining regulation and transient response. The active output discharge circuit activates when the enable pin is driven low, pulling the output to ground through an internal switch. Foldback current limiting reduces the current limit during short-circuit conditions to protect the device.

Pin Name Type Function
1 EN Input Enable input (active high)
2 GND Power Ground connection
3 OUT Output Regulated 3.3V output
4 IN Power Input supply (1.4-5.5V)
  • Always-on power rails in IoT sensors and smart meters
  • Wearable electronics with single-cell Li-ion batteries
  • Portable medical devices requiring extended battery life
  • Building automation and environmental sensor nodes
  • Post-regulation stage after DC-DC converters
Manufacturer Part Number Package Notes
TI TPS7A0530PDQNR X2SON-4 3.0V fixed output variant
TI TPS7A0518PDQNR X2SON-4 1.8V fixed output variant
Microchip MCP1811BT-033/OT SOT-23-3 3.3V, 1uA IQ, larger package
Richtek RT9013-33GB SOT-23-5 3.3V LDO, higher IQ
onsemi NCP511SN33T1G TSOP-5 3.3V, 150mA, low IQ
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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