Product details


Output options Adjustable Output, Fixed Output Iout (Max) (A) 1 Vin (Max) (V) 5.5 Vin (Min) (V) 2.2 Vout (Max) (V) 5.5 Vout (Min) (V) 1.2 Fixed output options (V) 2.1, 2.5 Noise (uVrms) 32 Iq (Typ) (mA) 0.4 Thermal resistance θJA (°C/W) 67 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Enable, Foldback Overcurrent Protection, Reverse Current Protection Accuracy (%) 1 PSRR @ 100 KHz (dB) 32 Dropout voltage (Vdo) (Typ) (mV) 130 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Linear regulators (LDO)


  • Stable with 1-µF or Larger Ceramic Output
  • Input Voltage Range: 2.2 V to 5.5 V
  • Ultralow Dropout Voltage:
    • 200-mV Maximum at 1 A
  • Excellent Load Transient Response–Even With
    Only 1-µF Output Capacitor
  • NMOS Topology Delivers Low Reverse Leakage
  • Excellent Accuracy:
    • 0.23% Nominal Accuracy
    • 1% Overall Accuracy Over Line, Over Load,
      and Over Temperature
  • Less Than 20-nA typical IQ in Shutdown Mode
  • Thermal Shutdown and Current Limit for Fault
open-in-new Find other Linear regulators (LDO)


The TPS7A37 family of linear low-dropout (LDO) voltage regulators uses an NMOS pass element in a voltage-follower configuration. This topology is relatively insensitive to output capacitor value and ESR, allowing a wide variety of load configurations. Load transient response is excellent, even with a small 1-µF ceramic output capacitor. The NMOS topology also allows very low dropout.

The TPS7A37 family uses an advanced BiCMOS process to yield high precision while delivering very low dropout voltages and low ground pin current. Current consumption, when not enabled, is under 20 nA and ideal for portable applications. These devices are protected by thermal shutdown and foldback current limit.

open-in-new Find other Linear regulators (LDO)
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Technical documentation

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Type Title Date
* Data sheet 1% High-Accuracy, 1-A, Low-Dropout Regulator with Reverse Current Protection datasheet (Rev. B) Oct. 23, 2013
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Technical article LDO basics: noise – part 1 Jun. 14, 2017
User guide Universal Low-Dropout (LDO) Linear Voltage Regulator EVM User's Guide Oct. 12, 2016
User guide TPS7A37XXDRV-529 Evaluation Module Jan. 22, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The Texas Instruments TPS7A3721EVM-529 is a fully assembled and tested evaluation module (EVM) for evaluating the TPS7A3721 low-dropout regulator (LDO) at a fixed output voltage of 2.1V with 1% output accuracy (worst case). The EVM circuit is configured to be a reference design for engineering (...)
  • 1% Overall Accuracy Over Line, Load and Temperature
  • Input Voltage Range: 2.2V to 5.5V
  • Low Dropout Voltage: 50mV typ at 300mA, 250mV max at 300mA, 130mV typ at 1A, 500mV max at 1A
  • Excellent Load Transient Response
  • Thermal Shutdown and Current Limit Protection

Design tools & simulation

SBVM311.ZIP (21 KB) - PSpice Model
SBVM314.ZIP (21 KB) - PSpice Model
SBVM318.ZIP (21 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
WSON (DRV) 6 View options

Ordering & quality

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