ADP7157ARDZ-04-R7

ANALOG DEVICES  ADP7157ARDZ-04-R7  芯片, 稳压器, LDO, 可调, 1.2V-3.3V, 1.2A, NSOIC-8 新

Product Details

The ADP7157 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 1.2 A of output current. Output voltages from 1.2 V to 3.3 V are possible depending on the model. Using an advanced proprietary architecture, the device provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 μF ceramic output capacitor.

The ADP7157 is available in four models that optimize power dissipation and PSRR performance as a function of the input and output voltage.

The typical output noise the ADP7157 regulator is 0.9 μV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz for noise spectral density from 10 kHz to 1 MHz. The ADP7157 is available in 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 1.2 A of output current in a small, low profile footprint.

Applications

.

Regulation to noise sensitive applications: phase-locked loops PLLs, voltage controlled oscillators VCOs, and PLLs with integrated VCOs

.

Communications and infrastructure

.

Backhaul and microwave links

### Features and Benefits

.

Input voltage range: 2.3 V to 5.5 V

.

Adjustable output voltage range VOUT: 1.2 V to 3.3 V

.

Maximum load current: 1.2 A

.

Low noise

.

0.9 µV rms typical output noise from 100 Hz to 100 kHz

.

1.6 µV rms typical output noise from 10 Hz to 100 kHz

.

Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz

.

Power supply rejection ratio PSRR

.

82 dB from 1 kHz to 100 kHz

.

55 dB at 1 MHz

.

Dropout voltage: 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V

.

Initial accuracy: ±0.6% at ILOAD = 10 mA

.

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

.

Operating supply current IGND

.

4.0 mA typical at 0 µA

.

7.0 mA typical at 1.2 A

.

Low shutdown current: 0.2 μA typical

.

Stable with a 10 µF ceramic output capacitor

.

10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages

.

Precision enable

.

Supported by simPower tool