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ADP122 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADP122은 전자 산업 및 응용 분야에서
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부품번호 ADP122 기능
기능 (ADP122 / ADP123) CMOS Linear Regulator
제조업체 Analog Devices
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ADP122 데이터시트, 핀배열, 회로
5.5 V Input, 300 mA, Low Quiescent
Current, CMOS Linear Regulator
ADP122/ADP123
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
GENERAL DESCRIPTION
www.DaTthaeShAeDetP41U2.c2o/AmDP123 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.
The ADP122 is capable of 31 fixed output voltages from 1.75 V
to 3.3 V. The ADP123 is the adjustable version of the device and
allows the output voltage to be set between 0.8 V and 5.0 V by
an external voltage divider.
TYPICAL APPLICATION CIRCUIT
VIN = 2.3V TO 5.5V
CIN
1µF
1 VIN VOUT 5
ADP122
2 GND
VOUT = 1.8V
COUT
1µF
ON
OFF
3 EN
NC 4
Figure 1. ADP122 with Fixed Output Voltage
VIN = 2.3V TO 5.5V
CIN
1µF
1 VIN VOUT 5
ADP123
2 GND
VOUT = 0.5V(1 + R1/R2)
COUT
1µF
R1
ON
OFF
3 EN
ADJ 4
R2
Figure 2. ADP 123 with Adjustable Output Voltage
The ADP122/ADP123 are specifically designed for stable operation
with tiny 1 μF ceramic input and output capacitors to meet the
requirements of high performance, space constrained applications.
The ADP122/ADP123 have an internal soft start that gives a
constant start-up time of 350 μs. Short-circuit protection and
thermal overload protection circuits prevent damage in adverse
conditions. The ADP122/ADP123 are available in a tiny, 5-lead
TSOT package for the smallest footprint solution to meet a
variety of portable applications.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.




ADP122 pdf, 반도체, 판매, 대치품
ADP122/ADP123
Parameter
OUTPUT NOISE
POWER SUPPLY REJECTION RATIO
(VIN = VOUT + 0.5 V)
Symbol
OUTNOISE
PSRR
Test Conditions
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 1.2 V
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 1.8 V
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 2.5 V
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 3.3 V
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 4.2 V
10 kHz, VOUT = 3.3 V
10 kHz, VOUT = 2.5 V
10 kHz, VOUT = 1.8 V
100 kHz, VOUT = 3.3 V
100 kHz, VOUT = 2.5 V
100 kHz, VOUT = 1.8 V
Min Typ Max Unit
25 μV rms
35 μV rms
45 μV rms
55 μV rms
65
60 dB
60 dB
60 dB
60 dB
60 dB
60 dB
1 The current from the external resistor divider network in the case of adjustable voltage output (as with the ADP123) should be subtracted from the ground current measured.
2 Accuracy when VOUT is connected directly to ADJ. When VOUT voltage is set by external feedback resistors, absolute accuracy in adjust mode depends on the tolerances of
the resistors used.
3 Based on an endpoint calculation using 1 mA and 300 mA loads.
4 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output voltages
greater than 2.3 V.
5 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value.
6 Current limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.3 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 3.3V, or 2.97 V.
RECOMMENDED SPECIFICATIONS
Table 2.
Parameter
Minimum Input and Output
Capacitance1
Capacitor ESR
Symbol
CAPMIN
RESR
Test Conditions
TA = −40°C to +125°C
TA = −40°C to +125°C
Min Typ
0.70
0.001
Max Unit
μF
1 The minimum input and output capacitance should be greater than 0.70 μF over the full range of operating conditions. The full range of operating conditions in the
application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended;
Y5V and Z5U capacitors are not recommended for use with any LDO.
www.DataSheet4U.com
Rev. 0 | Page 4 of 20

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ADP122 전자부품, 판매, 대치품
ADP122/ADP123
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6 V, VOUT = 3.3 V, IOUT = 10 mA, CIN = 1.0 μF, COUT = 1.0 μF, TA = 25°C, unless otherwise noted.
3.300
250
3.295
3.290
3.285
3.280
3.275
3.270
3.265
IOUT = 100µA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 200mA
IOUT = 300mA
200
IOUT = 300mA
150 IOUT = 200mA
IOUT = 100mA
100
IOUT = 10mA
50
IOUT = 100µA
IOUT = 1mA
3.260
–40
–5 25 85
JUNCTION TEMPERATURE (°C)
125
Figure 5. Output Voltage vs. Junction Temperature
0
–40
–5 25 85
JUNCTION TEMPERATURE (°C)
125
Figure 8. Ground Current vs. Junction Temperature
3.2945
3.2940
3.2935
3.2930
3.2925
3.2920
3.2915
3.2910
3.2905
3.2900
www.DataSh3e.2e89t45U.com
0.1
1
10
IOUT (mA)
100
Figure 6. Output Voltage vs. Load Current
1000
200
180
160
140
120
100
80
60
40
20
0
0.1
1 10 100
IOUT (mA)
Figure 9. Ground Current vs. Load Current
1000
3.296
3.294
3.292
3.290
3.288
3.286
3.284
3.6
IOUT = 100µA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 200mA
IOUT = 300mA
3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2
VIN (V)
Figure 7. Output Voltage vs. Input Voltage
5.4
200
180 IOUT = 300mA
160
140 IOUT = 200mA
120
IOUT = 100mA
100
80 IOUT = 10mA
IOUT = 1mA
60
40 IOUT = 100µA
20
0
3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2
VIN (V)
Figure 10. Ground Current vs. Input Voltage
5.4
Rev. 0 | Page 7 of 20

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