Datasheet ADP172 (Analog Devices)

300 mA, Low Quiescent Current, CMOS Linear Regulator Data Sheet ADP172 FEATURES TYPICAL APPLICATION CIRCUITS Maximum output current: 300 mA V VIN VOUT Input voltage range: 1.6 V to 3.6 V IN = 2.3V VOUT = 1.8V Low quiescent current C1 U1 C2 EN GND ON IGND = 23 µA with 0 mA load
001
OFF IGND = 170 µA with 300 mA load
06111-
Low shutdown current: <1 µA
Figure 1. ADP172 with Fixed Output Voltage, 1.8 V
Low dropout voltage: 50 mV at 300 mA load Output voltage accuracy: ±1% Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V Accuracy over line, load, and temperature: ±3% Stable with small 1 µF ceramic output capacitor PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz Low noise: 30 µV rms at VOUT = 0.8 V Current limit and thermal overload protection Logic-controlled enable Tiny 4-ball, 0.5 mm pitch WLCSP package APPLICATIONS Mobile phones Digital camera and audio devices Portable and battery-powered equipment DSP/FPGA/microprocessor supplies Post dc-to-dc regulation GENERAL DESCRIPTION
The ADP172 is a low voltage input, low quiescent current, low- commodity-type LDOs, the ADP172 provides 20 dB to 40 dB dropout (LDO) linear regulator that operates from 1.6 V to 3.6 V better power supply rejection ratio (PSRR) at 100 kHz, making the and provides up to 300 mA of output current. The low 50 mV ADP172 an ideal power source for analog-to-digital converter dropout voltage at 300 mA load improves efficiency and allows (ADC) mixed-signal processor systems and allowing use of operation over a wide input voltage range. The low 23 µA of smaller size bypass capacitors. In addition, low output noise quiescent current at no load makes the ADP172 ideal for performance without the need for an additional bypass capacitor battery-operated portable equipment. further reduces printed circuit board (PCB) component count. The ADP172 is capable of 31 fixed-output voltage options, ranging Short-circuit protection and thermal overload protection circuits from 0.8 V to 3.0 V. The ADP172 is optimized for stable operation prevent damage in adverse conditions. The ADP172 is available with small 1 µF ceramic output capacitors. Ideal for powering in a tiny 4-ball, 0.5 mm pitch WLCSP for the smallest footprint digital processors, the ADP172 exhibits good transient perform- solution to meet a variety of portable power applications. ance and occupies minimal board space. Compared with
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Document Outline Features Applications Typical Application Circuits General Description Table of Contents Revision History Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Enable Feature Current Limit and Thermal Overload Protection Thermal Considerations Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide