Datasheet ADP170, ADP171 (Analog Devices)

300 mA, Low Quiescent Current, CMOS Linear Regulators Data Sheet ADP170/ ADP171 FEATURES TYPICAL APPLICATION CIRCUITS Maximum output current: 300 mA VIN VOUT Input voltage range: 1.6 V to 3.6 V 1 VIN VOUT 5 Low quiescent current C1 ADP170 C2 I 2 GND GND = 23 µA with 0 mA load IGND = 170 µA with 300 mA load ON Low shutdown current: <1 µA 3 EN NC 4 OFF Low dropout voltage: 66 mV at 300 mA load
001
Output voltage accuracy: ±1%
07716- Figure 1. ADP170 with Fixed Output Voltage, 1.8 V
Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V Adjustable-output voltage range VIN = 2.3V VOUT = 1.8V 1 VIN VOUT 5 0.8 V to 3.0 V (ADP171) C C IN OUT Accuracy over line, load, and temperature: ±3% ADP171 1µF 1µF 2 GND Stable with small 1 µF ceramic output capacitor R1 PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz ON 3 EN ADJ 4 Low noise: 30 µV rms at V OFF OUT = 0.8 V Current limit and thermal overload protection R2
002
Logic-controlled enable
07716-
Compact 5-lead TSOT package
Figure 2. ADP171 with Adjustable Output Voltage
APPLICATIONS Mobile phones Digital camera and audio devices Portable and battery-powered equipment DSP/FPGA/microprocessor supplies Post dc-dc regulation GENERAL DESCRIPTION
The ADP170/ADP171 are low voltage input, low quiescent performance and occupy minimal board space. Compared with current, low-dropout (LDO) linear regulators that operate from commodity types of LDOs, the ADP170/ADP171 provide 20 dB 1.6 V to 3.6 V and provide up to 300 mA of output current. The to 40 dB better power supply rejection ratio (PSRR) at 100 kHz, low 66 mV dropout voltage at 300 mA load improves efficiency making the ADP170/ADP171 an ideal power source for analog- and allows operation over a wide input voltage range. The low to-digital converter (ADC) mixed-signal processor systems and 23 µA of quiescent current at a 0 mA load makes the ADP170/ allowing use of smaller size bypass capacitors. In addition, low ADP171 ideal for battery-operated portable equipment. output noise performance without the need for an additional The ADP170 is capable of 31 fixed-output voltage options, ranging bypass capacitor further reduces printed circuit board (PCB) from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows component count. output voltages that range from 0.8 V to 3.0 V via an external Short-circuit protection and thermal overload protection circuits divider. The ADP170/ADP171 are optimized for stable operation prevent damage in adverse conditions. The ADP170/ADP171 with small 1 µF ceramic output capacitors. Ideal for powering are available in tiny 5-lead TSOT for the smallest footprint digital processors, the ADP170/ADP171 exhibit good transient solution to meet a variety of portable power applications.
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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 Configurations 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