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ADP121CB-2.5-EVALZ View Datasheet(PDF) - Analog Devices

Part NameADP121CB-2.5-EVALZ ADI
Analog Devices ADI
Description150 mA, Low Quiescent Current, CMOS Linear Regulator


ADP121CB-2.5-EVALZ Datasheet PDF : 20 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Data Sheet
0
VRIPPLE = 50mV
–10 VIN = 5V
VOUT = 1.2V
–20 COUT = 1µF
–30
–40
–50
–60
150mA
100mA
10mA
1mA
100µA
0µA
–70
–80
–90
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 17. Power Supply Rejection Ratio vs. Frequency
0
VRIPPLE = 50mV
–10 VIN = 5V
VOUT = 1.8V
–20 COUT = 1µF
–30
–40
150mA
100mA
10mA
1mA
100µA
0µA
–50
–60
–70
–80
–90
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 18. Power Supply Rejection Ratio vs. Frequency
0
VRIPPLE = 50mV
–10 VIN = 5V
VOUT = 3.3V
–20 COUT = 1µF
–30
–40
150mA
100mA
10mA
1mA
100µA
0µA
–50
–60
–70
–80
–90
–100
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 19. Power Supply Rejection Ratio vs. Frequency
ADP121
0
3.3V/150mA
1.2V/150mA
1.8V/150mA
3.3V/100µA
1.2V/100µA
1.8V/100µA
–20
–40
–60
–80
–100
–120
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 20. Power Supply Rejection Ratio vs. Frequency at Various Output
Voltages and Load Currents
10
1.2V
1.8V
3.3V
1
0.1
0
10
100
1k
10k
100k
FREQUENCY (Hz)
Figure 21. Output Noise Spectrum, VIN = 5 V, ILOAD = 10 mA, COUT = 1 µF
70
60
50
40
30
20
10
0
0.001
0.01
0.1
1
10
ILOAD (mA)
3.3V
2.5V
1.8V
1.5V
1.2V
100
1000
Figure 22. Output Noise vs. Load Current and Output Voltage, VIN = 5 V, COUT = 1 μF
Rev. G | Page 9 of 20
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GENERAL DESCRIPTION
The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.
The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.
Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available 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.

FEATURES
  Input voltage range: 2.3 V to 5.5 V
  Output voltage range: 1.2 V to 3.3 V
  Output current: 150 mA
  Low quiescent current
     IGND = 11 μA with 0 μA load
     IGND = 30 μA with 150 mA load
  Low shutdown current: <1 μA
  Low dropout voltage
     90 mV @ 150 mA load
  High PSRR
     70 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
  Output voltage accuracy: ±1%
  Stable with a small 1 μF ceramic output capacitor
  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

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