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Product details

Parameters

Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 6 Vin (Min) (V) 1.5 Vout (Max) (V) 5.5 Vout (Min) (V) 0.55 Noise (uVrms) 53 Iq (Typ) (mA) 0.025 Thermal resistance θJA (°C/W) 80 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Enable, Power Good, Output Discharge, Soft Start, Foldback Overcurrent Protection Accuracy (%) 1 PSRR @ 100 KHz (dB) 45 Dropout voltage (Vdo) (Typ) (mV) 190 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)

Features

  • Input Voltage Range: 1.5 V to 6.0 V
  • Adjustable Output Voltage:
    • 0.55 V to 5.5 V
  • Very Low Dropout:
    • 225 mV (max) at 1 A (3.3 VOUT)
  • High Output Accuracy:
    • 0.7%, Typical
    • 1%, Maximum Over Temperature (85°C)
  • Open-Drain Power-Good Output
  • Power-Good Rising Delay:
    • TPS746: 165 µs
    • TPS746B: 5 ms
  • IQ: 25 µA (Typical)
  • Built-In Soft-Start With Monotonic VOUT Rise
  • Package:
    • 2-mm × 2-mm 6-Pin WSON (DRV)
  • Active Output Discharge
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Description

The TPS746 is an adjustable 1-A low-dropout (LDO) regulator with power-good functionality. This device is available in a small, 6-pin, 2-mm × 2-mm WSON package and consumes very low quiescent current and provides fast line and load transient performance. The TPS746 features an ultra-low dropout of 225 mV at 1 A that can help improve the power efficiency of the system.

The TPS746 is optimized for a wide variety of applications by supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of 0.55 V to 5.5 V. The low output voltage enables this LDO to power the modern microcontrollers with lower core voltages. Additionally, the TPS746 has a low IQ with enable functionality to minimize standby power. This device features an internal soft-start to lower the inrush current, which provides a controlled voltage to the load and minimizes the input voltage drop during start up.

The TPS746 has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output can be used for sequencing multiple power sources in the system.

The TPS746 is stable with small ceramic output capacitors, allowing for a small overall solution size. A precision band-gap and error amplifier provides a high accuracy of 0.7% max at 25ºC and 1% max over temperature (85ºC). This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS746 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.




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Technical documentation

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Type Title Date
* Data sheet TPS746 1-A High Accuracy Adjustable LDO With Power-Good in a Small Size Package datasheet (Rev. A) Dec. 11, 2018
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
User guide TPS746EVM-009 Evaluation Module User's Guide Mar. 14, 2018
Technical article LDO basics: noise – part 1 Jun. 14, 2017

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description

The TPS746EVM-009 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS746, which is a 1-A, low-Vin, low-dropout (LDO) voltage regulator with power good.

The EVM circuit board is configured to be a reference design for engineering (...)

Features
  • Input voltage range: 1.5 V to 6 V
  • Low dropout: 190 mV (max) at 1 A
  • Low quiescent current: 25 µA (typ)
  • High accuracy: 1% over temperature
  • Power good

Design tools & simulation

SIMULATION MODEL Download
SBVM927.ZIP (43 KB) - PSpice Model
SIMULATION MODEL Download
SBVM928.ZIP (3 KB) - PSpice Model
SIMULATION MODEL Download
SBVM929.ZIP (44 KB) - PSpice Model
SIMULATION MODEL Download
SBVM930.ZIP (3 KB) - PSpice Model
SIMULATION MODEL Download
SBVM933.ZIP (3 KB) - PSpice Model
SIMULATION MODEL Download
SBVM934.ZIP (47 KB) - PSpice Model
SIMULATION MODEL Download
SBVM935.ZIP (3 KB) - PSpice Model
SIMULATION MODEL Download
SBVM936.ZIP (44 KB) - PSpice Model
SIMULATION MODEL Download
SBVM937.ZIP (45 KB) - PSpice Model
SIMULATION MODEL Download
SBVM938.ZIP (3 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
WSON (DRV) 6 View options

Ordering & quality

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  • Ongoing reliability monitoring

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