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) 3.3 Noise (uVrms) 7.7 Iq (Typ) (mA) 0.007 Thermal resistance θJA (°C/W) 197.1 Rating Catalog Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output Discharge Accuracy (%) 1.5 PSRR @ 100 KHz (dB) 61 Dropout voltage (Vdo) (Typ) (mV) 175 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) 3.3 Noise (uVrms) 7.7 Iq (Typ) (mA) 0.007 Thermal resistance θJA (°C/W) 197.1 Rating Catalog Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Features Enable, Output Discharge Accuracy (%) 1.5 PSRR @ 100 KHz (dB) 61 Dropout voltage (Vdo) (Typ) (mV) 175 Operating temperature range (C) -40 to 125
PowerWCSP (YWD) 4
  • 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%
  • Stable with 1-µF ceramic output capacitors
  • 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%
  • Stable with 1-µF ceramic output capacitors
  • 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. The TPS7A21 low quiescent current 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. The TPS7A21 low quiescent current 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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Type Title Date
* Data sheet TPS7A21 500-mA, Low-Noise, Low-IQ, High-PSRR LDO datasheet 13 Dec 2021
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
User guide TPS7A21EVM-059 User's Guide 08 Oct 2021

Design & development

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Evaluation board

TPS7A21EVM-059 — TPS7A21 evaluation module for 500-mA, low-noise, 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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Simulation model

TPS7A21 PSpice Transient Model

SBVM976.ZIP (246 KB) - PSpice Model
Package Pins Download
DSBGA (YWD) 4 View options

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