ADP7142ACPZN3.3-R7 datasheet(1/23 Pages) AD

部件名	ADP7142ACPZN3.3-R7

功能描述	40 V, 200 mA, Low Noise, CMOS LDO Linear Regulator

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制造商	AD [Analog Devices]

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40 V, 200 mA, Low Noise,

CMOS LDO Linear Regulator

Data Sheet

ADP7142

Rev. H

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FEATURES

Low noise: 11 μV rms independent of fixed output voltage

PSRR of 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz,

VOUT ≤ 5 V, VIN = 7 V

Input voltage range: 2.7 V to 40 V

Maximum output current: 200 mA

Initial accuracy: ±0.8%

Accuracy over line, load, and temperature

−1.2% to +1.5%, TJ = −40°C to +85°C

±1.8%, TJ = −40°C to +125°C

Low dropout voltage: 200 mV (typical) at a 200 mA load,

VOUT = 5 V

User programmable soft start (LFCSP and SOIC only)

Low quiescent current, IGND = 50 μA (typical) with no load

Low shutdown current: 1.8 μA at VIN = 5 V, 3.0 μA at VIN = 40 V

Stable with a small 2.2 μF ceramic output capacitor

Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V

15 standard voltages between 1.2 V and 5.0 V are

available

Adjustable output from 1.2 V to VIN – VDO, output can be

adjusted above initial set point

Precision enable

2 mm × 2 mm, 6-lead LFCSP, 8-Lead SOIC, 5-Lead TSOT

Supported by ADIsimPower tool

APPLICATIONS

Regulation to noise sensitive applications

ADC, DAC circuits, precision amplifiers, power for

VCO VTUNE control

Communications and infrastructure

Medical and healthcare

Industrial and instrumentation

TYPICAL APPLICATION CIRCUITS

GND

EN

SS

VIN

VOUT

ADP7142

ON

OFF

VIN = 6V

VOUT = 5V

SENSE/ADJ

CIN

2.2µF

COUT

2.2µF

CSS

1nF

Figure 1. ADP7142 with Fixed Output Voltage, 5 V

GND

EN

SS

VIN

VOUT

ADP7142

ON

OFF

VIN = 7V

VOUT = 6V

SENSE/ADJ

CIN

2.2µF

COUT

2.2µF

CSS

1nF

2kΩ

10kΩ

Figure 2. ADP7142 with 5 V Output Adjusted to 6 V

GENERAL DESCRIPTION

The ADP7142 is a CMOS, low dropout (LDO) linear regulator

that operates from 2.7 V to 40 V and provides up to 200 mA of

output current. This high input voltage LDO is ideal for the

regulation of high performance analog and mixed signal

circuits operating from 39 V down to 1.2 V rails. Using an

advanced proprietary architecture, the device provides high

power supply rejection, low noise, and achieves excellent line and

load transient response with a small 2.2 μF ceramic output

capacitor. The ADP7142 regulator output noise is 11 μV rms

independent of the output voltage for the fixed options of 5 V

or less.

The ADP7142 is available in 15 fixed output voltage options.

The following voltages are available from stock: 1.2 V

(adjustable), 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V. Additional

voltages available by special order are 1.5 V, 1.85 V, 2.0 V, 2.2 V,

2.75 V, 2.8 V, 2.85 V, 4.2 V, and 4.6 V.

Each fixed output voltage can be adjusted above the initial set

point with an external feedback divider. This allows the ADP7142

to provide an output voltage from 1.2 V to VIN − VDO with high

PSRR and low noise.

User programmable soft start with an external capacitor is

available in the LFCSP and SOIC packages.

The ADP7142 is available in a 6-lead, 2 mm × 2 mm LFCSP

making it not only a very compact solution, but it also provides

excellent thermal performance for applications requiring up to

200 mA of output current in a small, low profile footprint. The

ADP7142 is also available in a 5-lead TSOT and an 8-lead SOIC.

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