2 A, Low VIN, Low Noise,

CMOS Linear Regulator

Data Sheet

ADP1762

Rev. D

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FEATURES

2 A maximum output current

Low input voltage supply range

VIN = 1.10 V to 1.98 V, no external bias supply required

Fixed output voltage range: VOUT_FIXED = 0.9 V to 1.5 V

Adjustable output voltage range: VOUT_ADJ = 0.5 V to 1.5 V

Ultralow noise: 2 μV rms, 100 Hz to 100 kHz

Noise spectral density

4 nV/√Hz at 10 kHz

3 nV/√Hz at 100 kHz

Low dropout voltage: 62 mV typical at 2 A load

Operating supply current: 4.5 mA typical at no load

±1.5% fixed output voltage accuracy over line, load, and

temperature

Excellent power supply rejection ratio (PSRR) performance

62 dB typical at 10 kHz at 2 A load

46 dB typical at 100 kHz at 2 A load

Excellent load/line transient response

Soft start to reduce inrush current

Optimized for small 10 μF ceramic capacitors

Current-limit and thermal overload protection

Power-good indicator

Precision enable

16-lead, 3 mm × 3 mm LFCSP package

AEC-Q100 qualified for automotive applications

APPLICATIONS

Regulation to noise sensitive applications such as radio

frequency (RF) transceivers, analog-to-digital converter

(ADC) and digital-to-analog converter (DAC) circuits,

phase-locked loops (PLLs), voltage controlled oscillators

(VCOs) and clocking integrated circuits

Field-programmable gate array (FPGA) and digital signal

processor (DSP) supplies

Medical and healthcare

Industrial and instrumentation

GENERAL DESCRIPTION

The ADP1762 is a low noise, low dropout (LDO) linear regulator.

It is designed to operate from a single input supply with an

input voltage as low as 1.10 V, without the requirement of an

external bias supply, to increase efficiency and provide up to

2 A of output current.

The low 62 mV typical dropout voltage at a 2 A load allows the

ADP1762 to operate with a small headroom while maintaining

regulation and providing better efficiency.

TYPICAL APPLICATION CIRCUITS

VIN

EN

SS

VREG

VOUT

SENSE

COUT

10µF

PG

RPULL-UP

100kΩ

PG

VADJ

GND

REFCAP

CIN

10µF

ON

OFF

VOUT = 1.5V

ADP1762

VIN = 1.7V

CREG

1µF

CREF

1µF

CSS

10nF

Figure 1. Fixed Output Operation

VIN

EN

SS

VREG

VOUT

SENSE

PG

RPULL-UP

100kΩ

PG

VADJ

GND

REFCAP

CREG

1µF

CREF

1µF

RADJ

10kΩ

CSS

10nF

ON

OFF

VOUT = 1.5V

ADP1762

VIN = 1.7V

COUT

10µF

CIN

10µF

Figure 2. Adjustable Output Operation

Table 1. Related Devices

Device

Input

Voltage

Maximum

Current

Fixed/

Adjustable

Package

ADP1761

1.10 V to

1.98 V

1 A

Fixed/adjustable

16-lead

LFCSP

ADP1763

1.10 V to

1.98 V

3 A

Fixed/adjustable

16-lead

LFCSP

ADP1740/

ADP1741

1.6 V to

3.6 V

2 A

Fixed/adjustable

16-lead

LFCSP

ADP1752/

ADP1753

1.6 V to

3.6 V

0.8 A

Fixed/adjustable

16-lead

LFCSP

ADP1754/

ADP1755

1.6 V to

3.6 V

1.2 A

Fixed/adjustable

16-lead

LFCSP

The ADP1762 is optimized for stable operation with small 10 μF

ceramic output capacitors. The ADP1762 delivers optimal

transient performance with minimal board area.

The ADP1762 is available in fixed output voltages ranging from

0.9 V to 1.5 V. The output of the adjustable output model can be

set from 0.5 V to 1.5 V through an external resistor connected

between VADJ and ground.

The ADP1762 has an externally programmable soft start time by

connecting a capacitor to the SS pin. Short-circuit and thermal

overload protection circuits prevent damage in adverse conditions.

The ADP1762 is available in a small 16-lead LFCSP for the smallest

footprint solution to meet a variety of applications.