ADM7172ACPZ-3.3 低压差稳压器

ADM7172ACPZ-3.3

低压差稳压器 2A Hi PSRR FT L DO 3.3Vo

6.5 V, 2 A, Ultralow Noise, High PSRR, Fast  Transient Response CMOS LDO

GENERAL DESCRIPTION ADM7172ACPZ-3.3

The ADM7172 is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 2 A of output current. This high output current LDO is ideal for regulation of high performance analog and mixed-signal circuits operating from 6 V down to 1.2 V rails. Using an advanced proprietary architecture, the device provides high power supply rejection and low noise, and achieves excellent line and load transient response with just a small 4.7 μF ceramic output capacitor. Load transient response is typically 1.5 μs for a 1 mA to 1.5 A load step.

FEATURES ADM7172ACPZ-3.3

Input voltage range: 2.3 V to 6.5 V

Maximum load current: 2 A

Low noise: 5 μV rms independent of output voltage at

100 Hz to 100 kHz

Fast transient response: 1.5 μs for 1 mA to 1.5 A load step

60 dB PSRR at 100 kHz

Low dropout voltage: 172 mV at 2 A load, VOUT = 3 V

Initial accuracy: −0.5% (minimum), +1% (maximum)

Accuracy over line, load, and temperature: ±1.5%

Quiescent current, IGND = 0.7 mA with no load

Low shutdown current: 0.25 μA at VIN = 5 V

Stable with small 4.7 μF ceramic output capacitor

Adjustable and fixed output voltage options: 1.2 V to 5.0 V

Adjustable output from 1.2 V to VIN − VDO

Precision enable

Adjustable soft start

8-lead 3 mm × 3 mm LFCSP package

Supported by ADIsimPower™ tool

APPLICATIONS ADM7172ACPZ-3.3

Regulation to noise sensitive applications: ADC and DAC

circuits, precision amplifiers, PLLs/VCOs, and clocking ICs

Communications and infrastructure

Medical and healthcare

Industrial and instrumentation