100 mA, Low Quiescent Current,
CMOS Linear Regulator
ADP120
FEATURES
TYPICAL APPLICATION CIRCUITS
ADP120
Input voltage range: 2.3 V to 5.5 V
Output voltage range: 1.2 V to 3.3 V
Output current: 100 mA
V
= 2.3V
V
= 1.8V
IN
OUT
1
2
3
5
VIN
GND
EN
VOUT
+
+
1µF
1µF
Low quiescent current
4
NC
I
I
GND = 11 μA with zero load
GND = 22 μA with 100 mA load
NC = NO CONNECT
Low shutdown current: <1 μA
Low dropout voltage
Figure 1. ADP120 TSOT with Fixed Output Voltage, 1.8 V
ADP120: 100 mV @ 100 mA load
ADP120-1: 60 mV @ 100 mA load
High PSRR
73 dB @ 1 kHz at VOUT = 1.2 V
70 dB @ 10 kHz at VOUT = 1.2 V
Low noise: 40 μV rms at VOUT = 1.2 V
No noise bypass capacitor required
Initial accuracy: 1ꢀ
Stable with small 1 μF ceramic output capacitor
16 fixed output voltage options
Current limit and thermal overload protection
Logic controlled enable
ADP120-1
V
= 2.3V
V
= 1.8V
OUT
IN
VIN
VOUT
+
+
1µF
1µF
EN
GND
Figure 2. ADP120-1 WLCSP with Fixed Output Voltage, 1.8 V
5-lead TSOT package
4-ball 0.4 mm pitch WLCSP
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
Post regulation
GENERAL DESCRIPTION
The ADP120 and ADP120-1 are low quiescent current, low
dropout, linear regulators that operate from 2.3 V to 5.5 V and
provide up to 100 mA of output current. The low 100 mV
dropout voltage at 100 mA load improves efficiency and allows
operation over a wide input voltage range. The low 25 μA of
quiescent current at full load make the ADP120 and the
ADP120-1 ideal for battery-operated portable equipment.
The ADP120 and ADP120-1 are available in 16 fixed output
voltage options, ranging from 1.2 V to 3.3 V. The parts are
optimized for stable operation with small 1 ꢀF ceramic output
capacitors. The ADP120 and ADP120-1 deliver good transient
performance with minimal board area.
Short-circuit protection and thermal overload protection circuits
prevent damage in adverse conditions. The ADP120 is available
in a tiny 5-lead TSOT and the ADP120-1 is available in a 4-ball
0.4 mm pitch WLCSP for the smallest footprint solution to
meet a variety of portable applications.
Rev. 0
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