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TPS7A21

ACTIVE

500mA, low-noise ultra-low-IQ high-PSRR low-dropout (LDO) voltage regulator

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Data sheet

TPS7A21

ACTIVE
Data sheet Order now

Product details

Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 6 Vin (min) (V) 2 Vout (max) (V) 5.5 Vout (min) (V) 0.8 Fixed output options (V) 2.8, 3, 3.3, 3.45, 3.7 Rating Catalog Noise (µVrms) 7.7 PSRR at 100 KHz (dB) 61 Iq (typ) (mA) 0.007 Thermal resistance θJA (°C/W) 187.1, 197.1 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output discharge Accuracy (%) 1.5 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 6 Vin (min) (V) 2 Vout (max) (V) 5.5 Vout (min) (V) 0.8 Fixed output options (V) 2.8, 3, 3.3, 3.45, 3.7 Rating Catalog Noise (µVrms) 7.7 PSRR at 100 KHz (dB) 61 Iq (typ) (mA) 0.007 Thermal resistance θJA (°C/W) 187.1, 197.1 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output discharge Accuracy (%) 1.5 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
POWERWCSP (YWD) 4 See data sheet
  • Very low IQ: 6.5 µA
  • Input voltage range: 2.0 V to 6.0 V
  • Output voltage range: 0.8 V to 5.5 V (50-mV steps)
  • High PSRR: 91 dB at 1 kHz
  • Low output voltage noise: 7.7 µVRMS
  • Low dropout:
    • 175 mV (maximum) at 500 mA (2.5-V VOUT)
  • Smart EN pulldown
  • Output voltage tolerance:
    • ±1.5% (line, load, and temperature)
  • Supports wide range of ceramic capacitors:
    • 1 µF to 200 µF
  • Operating junction temperature: –40°C to +125°C
  • Package:

    • 0.602-mm × 0.602-mm power DSBGA
  • Very low IQ: 6.5 µA
  • Input voltage range: 2.0 V to 6.0 V
  • Output voltage range: 0.8 V to 5.5 V (50-mV steps)
  • High PSRR: 91 dB at 1 kHz
  • Low output voltage noise: 7.7 µVRMS
  • Low dropout:
    • 175 mV (maximum) at 500 mA (2.5-V VOUT)
  • Smart EN pulldown
  • Output voltage tolerance:
    • ±1.5% (line, load, and temperature)
  • Supports wide range of ceramic capacitors:
    • 1 µF to 200 µF
  • Operating junction temperature: –40°C to +125°C
  • Package:

    • 0.602-mm × 0.602-mm power DSBGA

The TPS7A21 is an ultra-small, low-dropout (LDO) linear voltage regulator that can source 500 mA of output current. The device provides low noise, high PSRR, and excellent load and line transient performance to meet the requirements of RF and other sensitive analog circuits. Innovative design techniques result in low-noise performance without the addition of an external noise bypass capacitor. With the device low quiescent current, the TPS7A21 is a good choice for battery-powered systems. The 2.0-V to 6.0-V input voltage range and 0.8-V to 5.5-V output voltage range support a variety of system requirements. The internal precision reference circuit enables excellent accuracy; the maximum output voltage tolerance is 1.5% over load, line, and temperature variations.

An internal soft-start circuit helps control the inrush current, thus minimizing the input voltage drop during start up. The LDO is stable with small ceramic capacitors, allowing for a small overall solution size.

A smart enable input circuit with an internally controlled pulldown resistor keeps the LDO disabled even when the EN pin is unconnected and helps eliminate external components that are otherwise required to pull down the EN input.

The TPS7A21 is an ultra-small, low-dropout (LDO) linear voltage regulator that can source 500 mA of output current. The device provides low noise, high PSRR, and excellent load and line transient performance to meet the requirements of RF and other sensitive analog circuits. Innovative design techniques result in low-noise performance without the addition of an external noise bypass capacitor. With the device low quiescent current, the TPS7A21 is a good choice for battery-powered systems. The 2.0-V to 6.0-V input voltage range and 0.8-V to 5.5-V output voltage range support a variety of system requirements. The internal precision reference circuit enables excellent accuracy; the maximum output voltage tolerance is 1.5% over load, line, and temperature variations.

An internal soft-start circuit helps control the inrush current, thus minimizing the input voltage drop during start up. The LDO is stable with small ceramic capacitors, allowing for a small overall solution size.

A smart enable input circuit with an internally controlled pulldown resistor keeps the LDO disabled even when the EN pin is unconnected and helps eliminate external components that are otherwise required to pull down the EN input.
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Technical documentation

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* Data sheet TPS7A21 500-mA, Low-Noise, Low-IQ, High-PSRR LDO datasheet (Rev. A) PDF | HTML 21 Sep 2022
White paper Demystifying LDO Turn-On (startup) Time PDF | HTML 05 Oct 2024
User guide TPS7A21EVM-059 User's Guide PDF | HTML 08 Oct 2021

Design & development

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Evaluation board

TPS7A21EVM-059 — TPS7A21 evaluation module for 500-mA, low-noise ultra-low-IQ high-PSRR LDO regulator

The TPS7A21 evaluation module (EVM) helps design engineers evaluate the operation and performance of the TPS7A21 linear regulator for use in their own circuit application. This EVM configuration contains a single low-noise, small-size, low-dropout (LDO)regulator for a wide range of applications.

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User guide: PDF | HTML
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Simulation model

TPS7A21 PSpice Transient Model

SBVM976.ZIP (246 KB) - PSpice Model
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