Data Sheet

ADP172

300 mA, Low Quiescent Current, CMOS Linear Regulator

Rev. F

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FEATURES

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Maximum output current: 300 mA

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Input voltage range: 1.6 V to 3.6 V

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Low quiescent current

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Low shutdown current: <1 µA

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Low dropout voltage: 50 mV at 300 mA load

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Output voltage accuracy: ±1%

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Up to 31 fixed output voltage options available from 0.8 V to

3.0 V

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Accuracy over line, load, and temperature: ±3%

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Stable with small 1 µF ceramic output capacitor

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PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz

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Current limit and thermal overload protection

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Logic controlled enable

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Tiny 4-ball, 0.5 mm pitch WLCSP package

APPLICATIONS

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Mobile phones

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Digital camera and audio devices

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Portable and battery-powered equipment

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DSP/FPGA/microprocessor supplies

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Post dc-to-dc regulation

TYPICAL APPLICATION CIRCUIT

Figure 1. ADP172 with Fixed Output Voltage, 1.8 V

GENERAL DESCRIPTION

The ADP172 is a low voltage input, low quiescent current, low-drop-

out (LDO) linear regulator that operates from 1.6 V to 3.6 V and

provides up to 300 mA of output current. The low 50 mV dropout

voltage at 300 mA load improves efficiency and allows operation

over a wide input voltage range. The low 23 µA of quiescent current

at no load makes the ADP172 ideal for battery-operated portable

equipment.

The ADP172 is capable of 31 fixed-output voltage options, ranging

from 0.8 V to 3.0 V. The ADP172 is optimized for stable operation

with small 1 µF ceramic output capacitors. Ideal for powering digital

processors, the ADP172 exhibits good transient performance and

occupies minimal board space. Compared with commodity-type

LDOs, the ADP172 provides 20 dB to 40 dB better power supply

rejection ratio (PSRR) at 100 kHz, making the ADP172 an ideal

power source for analog-to-digital converter (ADC) mixed-signal

processor systems and allowing use of smaller size bypass capaci-

tors. In addition, low output noise performance without the need for

an additional bypass capacitor further reduces printed circuit board

(PCB) component count.

Short-circuit protection and thermal overload protection circuits

prevent damage in adverse conditions. The ADP172 is available in

a tiny 4-ball, 0.5 mm pitch WLCSP for the smallest footprint solution

to meet a variety of portable power applications.