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ADP122 View Datasheet(PDF) - Analog Devices

Part NameADP122 ADI
Analog Devices ADI
Description5.5 V Input, 300 mA, Low Quiescent Current, CMOS Linear Regulator


ADP122 Datasheet PDF : 20 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ADP122/ADP123
IOUT
1mA TO 300mA LOAD STEP
1
2
VOUT
VIN = 3.7V
VOUT = 3.3V
CH1
200mA
B
W
CH2
20.0mV
B
W
M 40.0µs
A
CH1
196mA
T 10.40%
Figure 23. Load Transient Response, COUT = 4.7 μF
VIN
4V TO 4.5V VOLTAGE STEP
2
VOUT
1
CH1
1.00V
B
W
CH2 2.00mV
B
W
M 10.0µs A CH3
2.04V
T 10.00%
Figure 24. Line Transient Response, Load Current = 1 mA
VIN
4V TO 4.5V VOLTAGE STEP
2
VOUT
1
CH1
1.00V
B
W
CH2
2.00mV
B
W
M 10.0µs A CH3
2.04V
T 9.600%
Figure 25. Line Transient Response, Load Current = 300 mA
Rev. 0 | Page 10 of 20
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GENERAL DESCRIPTION
The ADP122/ADP123 are low quiescent current, low dropout linear regulators. They are designed to operate from an input voltage between 2.3 V and 5.5 V and to provide up to 300 mA of output current. The low 85 mV dropout voltage at a 300 mA load improves efficiency and allows operation over a wide input voltage range.
The low 170 μA of quiescent current at full load makes the ADP122 ideal for battery-operated portable equipment.

FEATURES
Input voltage supply range: 2.3 V to 5.5 V
300 mA maximum output current
Fixed and adjustable output voltage versions
Very low dropout voltage: 85 mV at 300 mA load
Low quiescent current: 45 μA at no load
Low shutdown current: <1 μA
Initial accuracy: ±1% accuracy
Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V
Adjustable-output voltage range 0.8 V to 5.0 V (ADP123)
Excellent PSRR performance: 60 dB at 100 kHz
Excellent load/line transient response
Optimized for small 1.0 μF ceramic capacitors
Current limit and thermal overload protection
Logic controlled enable
Compact, 5-lead TSOT package

APPLICATIONS
Digital camera and audio devices
Portable and battery-powered equipment
Automatic meter reading (AMR) meters
GPS and location management units
Medical instrumentation
Point-of-sale equipment

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