Dual, 200 mA, Low Noise,
High PSRR Voltage Regulator
Data Sheet
ADP220/ADP221
FEATURES
TYPICAL APPLICATION CIRCUITS
1
2
Input voltage range: 2.5 V to 5.5 V
Dual independent 200 mA low dropout voltage regulators
Miniature 6-ball, 1.0 mm × 1.5 mm WLCSP and 6-ball
bumped bare die
ON
V
= 2.8V
OUT1
A
B
EN1
VOUT1
OFF
1µF
Initial accuracy: 1%
V
= 3.3V
IN
Stable with 1 µF ceramic output capacitors
No noise bypass capacitor required
Two independent logic controlled enables
Overcurrent and thermal protection
Active output pull-down (ADP221)
Key specifications
GND
VIN
1µF
TOP VIEW
(Not to Scale)
ON
V
= 2.8V
OUT2
C
EN2
VOUT2
OFF
1µF
High PSRR
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
50 µV rms typical output noise at VOUT = 2.8 V
Excellent transient response
THERMAL
SHUTDOWN
CURRENT
LIMIT
Low dropout voltage: 150 mV @ 200 mA load
60 µA typical ground current at no load, both LDOs enabled
100 µs fast turn-on circuit
EN1
EN2
CONTROL
LOGIC
AND
ADP221
ONLY
REFERENCE
ENABLE
Guaranteed 200 mA output current per regulator
−40°C to +125°C junction temperature
ADP220
CURRENT
LIMIT
APPLICATIONS
GND
60Ω
Mobile phones
VOUT2
Digital cameras and audio devices
Portable and battery-powered equipment
Portable medical devices
Figure 2. Block Diagram of the ADP220/ADP221
Post dc-to-dc regulation
GENERAL DESCRIPTION
The 200 mA dual output ADP220/ADP221 combine high PSRR,
low noise, low quiescent current, and low dropout voltage in a
voltage regulator ideally suited for wireless applications with
demanding performance and board space requirements.
without the need for a noise bypass capacitor. The ADP221 also
includes an active pull-down to quickly discharge output loads.
The ADP220/ADP221 are available in a miniature 6-ball
WLCSP package and 6-ball bumped bare die and is stable with
tiny 1 µF 30% ceramic output capacitors, resulting in the smallest
possible board area for a wide variety of portable power needs.
The low quiescent current, low dropout voltage, and wide input
voltage range of the ADP220/ADP221 extend the battery life of
portable devices. The ADP220/ADP221 maintain power supply
rejection greater than 60 dB for frequencies as high as 100 kHz
while operating with a low headroom voltage. The ADP220
offers much lower noise performance than competing LDOs
The ADP220/ADP221 are available in many output voltage
combinations, ranging from 0.8 V to 3.3 V, and offer overcur-
rent and thermal protection to prevent damage in adverse
conditions.
Rev. H
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Tel: 781.329.4700 ©2008–2013 Analog Devices, Inc. All rights reserved.
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www.analog.com
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