Datasheet ADP220, ADP221 (Analog Devices)

Dual, 200 mA, Low Noise, High PSRR Voltage Regulator Data Sheet ADP220/ADP221 FEATURES TYPICAL APPLICATION CIRCUITS Input voltage range: 2.5 V to 5.5 V 1 2 Dual independent 200 mA low dropout voltage regulators ON VOUT1 = 2.8V Miniature 6-ball, 1.0 mm × 1.5 mm WLCSP and 6-ball A OFF EN1 VOUT1 bumped bare die 1µF Initial accuracy: ±1% Stable with 1 µF ceramic output capacitors V B IN = 3.3V GND VIN No noise bypass capacitor required 1µF Two independent logic controlled enables TOP VIEW (Not to Scale) Overcurrent and thermal protection ON V Active output pull-down (ADP221) C OUT2 = 2.8V EN2 VOUT2 OFF Key specifications 1µF
001
High PSRR
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76 dB PSRR up to 1 kHz
Figure 1. Typical Application Circuit
70 dB PSRR at 10 kHz 60 dB PSRR at 100 kHz 40 dB PSRR at 1 MHz VIN VOUT1 Low output noise 60Ω 27 µV rms typical output noise at VOUT = 1.2 V THERMAL CURRENT 50 µV rms typical output noise at V SHUTDOWN LIMIT OUT = 2.8 V Excellent transient response Low dropout voltage: 150 mV @ 200 mA load EN1 CONTROL 60 µA typical ground current at no load, both LDOs enabled LOGIC REFERENCE ADP221 AND ONLY 100 µs fast turn-on circuit EN2 ENABLE Guaranteed 200 mA output current per regulator −40°C to +125°C junction temperature ADP220 CURRENT APPLICATIONS LIMIT GND 60Ω Mobile phones VOUT2
002
Digital cameras and audio devices
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Portable and battery-powered equipment
Figure 2. Block Diagram of the ADP220/ADP221
Portable medical devices Post dc-to-dc regulation GENERAL DESCRIPTION
The 200 mA dual output ADP220/ADP221 combine high PSRR, without the need for a noise bypass capacitor. The ADP221 also low noise, low quiescent current, and low dropout voltage in a includes an active pul -down to quickly discharge output loads. voltage regulator ideally suited for wireless applications with The ADP220/ADP221 are available in a miniature 6-ball demanding performance and board space requirements. WLCSP package and 6-ball bumped bare die and is stable with The low quiescent current, low dropout voltage, and wide input tiny 1 µF ± 30% ceramic output capacitors, resulting in the smallest voltage range of the ADP220/ADP221 extend the battery life of possible board area for a wide variety of portable power needs. portable devices. The ADP220/ADP221 maintain power supply The ADP220/ADP221 are available in many output voltage rejection greater than 60 dB for frequencies as high as 100 kHz combinations, ranging from 0.8 V to 3.3 V, and offer overcur- while operating with a low headroom voltage. The ADP220 rent and thermal protection to prevent damage in adverse offers much lower noise performance than competing LDOs conditions.
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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 (PCB) Layout Considerations Outline Dimensions Ordering Guide