Datasheet ADP121 (Analog Devices)

150 mA, Low Quiescent Current, CMOS Linear Regulator Data Sheet ADP121 FEATURES TYPICAL APPLICATION CIRCUITS Input voltage range: 2.3 V to 5.5 V V V Output voltage range: 1.2 V to 3.3 V IN = 2.3V OUT = 1.8V 1 VIN VOUT 5 Output current: 150 mA C C IN OUT Low quiescent current 1µF 2 GND 1µF IGND = 11 μA with 0 μA load 3 ON EN NC 4 I
01
GND = 30 μA with 150 mA load
0 1-
OFF Low shutdown current: <1 μA NC = NO CONNECT
690 0
Low dropout voltage
Figure 1. ADP121 TSOT with Fixed Output Voltage, 1.8 V
90 mV @ 150 mA load High PSRR 70 dB @ 1 kHz at VOUT = 1.2 V V VOUT = 1.8V IN = 2.3V VIN VOUT 70 dB @ 10 kHz at VOUT = 1.2 V C C IN OUT Low noise: 40 μV rms at V 1µF 1µF OUT = 1.2 V No noise bypass capacitor required ON
02 0
Output voltage accuracy: ±1% EN GND
1- 90
OFF
06
Stable with a small 1 μF ceramic output capacitor
Figure 2. ADP121 WLCSP with Fixed Output Voltage, 1.8 V
Current limit and thermal overload protection Logic controlled enable 5-lead TSOT package 4-ball 0.4 mm pitch WLCSP APPLICATIONS Mobile phones Digital cameras and audio devices Portable and battery-powered equipment Post dc-to-dc regulation Post regulation GENERAL DESCRIPTION
The ADP121 is a quiescent current, low dropout, linear regulator The ADP121 is available in output voltages ranging from 1.2 V that operates from 2.3 V to 5.5 V and provides up to 150 mA of to 3.3 V. The parts are optimized for stable operation with small output current. The low 135 mV dropout voltage at 150 mA 1 μF ceramic output capacitors. The ADP121 delivers good load improves efficiency and allows operation over a wide transient performance with minimal board area. input voltage range. The low 30 μA of quiescent current at full Short-circuit protection and thermal overload protection circuits load makes the ADP121 ideal for battery-operated portable prevent damage in adverse conditions. The ADP121 is available equipment. in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch halide-free WLCSP packages and utilizes the smallest footprint solution to meet a variety of portable applications.
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Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Recommended Specifications: Input and Output Capacitors 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 PCB Layout Considerations Outline Dimensions Ordering Guide