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TPS7A7001DDAR

2A adjustable LDO, 1.425V min input, 380mV dropout, SO PowerPAD-8

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Manufacturer Part：

TPS7A7001DDAR

Package：

SO PowerPAD-8 (4.89 x 3.90 x 1.47 mm, exposed pad)

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Description

Product Overview

The TPS7A7001DDAR from Texas Instruments is a 2A adjustable ultra-low-dropout LDO regulator with 1.425V minimum input, 380mV max dropout at 2A, and 0.5V adjustable output in SO PowerPAD-8 package.

Key Specifications

Topology Positive LDO Linear Regulator
Input Voltage Range 1.425 V to 6.5 V
Output Voltage Range 0.5 V to 5.0 V (adjustable via FB divider)
Output Current 2 A maximum
Dropout Voltage 200 mV typical / 380 mV max @ 2A
FB Reference Voltage 0.5 V
Line Regulation 0.4 %/V
Load Regulation 0.75 %/A
Quiescent Current (Active) 3 mA typical
Shutdown Current 1 uA typical
Output Capacitor 4.7 uF min (10 uF recommended)
Enable Pin Active high (1uA shutdown when low)
Protection Current limit, thermal shutdown (160C)
Package SO PowerPAD-8 (DDA suffix)
Operating Temperature -40 to +125 C

Features

  • 1.425V ultra-low minimum input voltage for sub-1.5V rails
  • 380mV max dropout at 2A enables VOUT close to VIN
  • 0.5V reference allows output voltage down to 0.5V
  • Enable pin with 1uA shutdown current for power gating
  • SO PowerPAD package for excellent thermal performance

Applications

  • Telecom and networking card point-of-load regulation
  • Post-regulation after switching converter for low noise
  • Core voltage regulation for FPGAs and processors
  • Battery-powered systems requiring low dropout
  • Medical equipment and notebook computer power

The TPS7A7001DDAR from Texas Instruments is a 2A adjustable ultra-low-dropout LDO regulator in SO PowerPAD-8 package. The device operates from a minimum 1.425V input and provides adjustable output from 0.5V to 5V via external feedback resistor divider. The 380mV maximum dropout at 2A makes it ideal for applications where the output voltage is very close to the input. The enable pin allows shutdown with only 1uA quiescent current. The internal 0.5V reference with feedback divider sets the output voltage: VOUT = 0.5 x (1 + R1/R2). The SO PowerPAD package provides excellent thermal dissipation through the exposed pad. The DDAR suffix denotes SO PowerPAD-8 with tape and reel packaging at 2500 units per reel.

The TPS7A7001DDAR operates as a positive low-dropout linear regulator. (1) The pass element is a P-channel MOSFET between IN and OUT. The error amplifier compares a fraction of the output voltage (via the FB pin) with the internal 0.5V reference. The amplifier output drives the gate of the PMOS pass element to regulate the output. The output voltage is set by the external resistor divider: VOUT = 0.5V x (1 + R1/R2), where R2 connects from FB to GND and R1 connects from OUT to FB. TI recommends R2 = 30.1kOhm for optimal performance. (2) The ultra-low dropout voltage is achieved by the PMOS pass element, which requires only a small gate-to-source voltage to remain in saturation. At 2A load, the maximum dropout is 380mV, meaning the device can regulate 1.8V output from a 2.18V input. The dropout voltage increases with load current due to the RDS(ON) of the pass element. (3) The enable pin (EN) is active high. When EN is low, the pass element is turned off and the device draws only 1uA. When EN is high, the device regulates normally. The thermal shutdown circuit disables the output at approximately 160C junction temperature and re-enables at 140C, protecting the device from damage. The current limit circuit protects against output short circuits by limiting the output current to a safe level.

Pin Name Function
1 EN Enable (active high)
2 IN Input supply (1.425-6.5V)
3 NC No connect
4 NC No connect
5 GND Ground (and PowerPAD)
6 NC No connect
7 FB Feedback (0.5V reference)
8 OUT Regulated output (2A max)
  • Telecom and networking card point-of-load regulation from 1.5V/1.8V rails
  • Post-regulation after switching converter for low-noise analog supply
  • Core voltage regulation for FPGAs and processors at 0.5V-1.8V
  • Battery-powered systems requiring low dropout and 1uA shutdown
  • Medical equipment and notebook computer power with enable control
Model Manufacturer Key Difference
TPS7A4700RGWR TI 1A, ultra-low noise, VQFN-20
TLV758P TI 3A, 0.6V min VIN, SOT-89
LT3021EDH ADI 500mA, 0.9V min VIN, DFN-12
NCP59302MNADJTYG onsemi 3A, 0.9V min, DFN-8
ISL8012IRTAJZ Renesas 2A, 1.1V min, DFN-8
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