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ADP170 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 ADP170
기능 (ADP170 / ADP171) CMOS Linear Regulators
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ADP170 데이터시트, 핀배열, 회로
300 mA, Low Quiescent Current,
CMOS Linear Regulators
ADP170/ADP171
FEATURES
Maximum output current: 300 mA
Input voltage range: 1.6 V to 3.6 V
Low quiescent current
IGND = 23 μA with 0 mA load
IGND = 170 μA with 300 mA load
Low shutdown current: <1 μA
Low dropout voltage: 66 mV at 300 mA load
Output voltage accuracy: ±1%
Up to 31 fixed-output voltage options available from 0.8 V to
3.0 V
Adjustable-output voltage range
0.8 V to 3.0 V (ADP171)
Accuracy over line, load, and temperature: ±3%
Stable with small 1 μF ceramic output capacitor
PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz
Low noise: 30 μV rms at VOUT = 0.8 V
Current limit and thermal overload protection
Logic-controlled enable
Compact 5-lead TSOT package
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
DSP/FPGA/microprocessor supplies
Post dc-dc regulation
GENERAL DESCRIPTION
The ADP170/ADP171 are low voltage input, low quiescent
current, low-dropout (LDO) linear regulators that operate from
1.6 V to 3.6 V and provide up to 300 mA of output current. The
low 66 mV dropout voltage at 300 mA load improves efficiency
and allows operation over a wide input voltage range. The low
23 μA of quiescent current at a 0 mA load makes the ADP170/
ADP171 ideal for battery-operated portable equipment.
The ADP170 is capable of 31 fixed-output voltage options, ranging
from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows
output voltages that range from 0.8 V to 3.0 V via an external
divider. The ADP170/ADP171 are optimized for stable operation
with small 1 μF ceramic output capacitors. Ideal for powering
digital processors, the ADP170/ADP171 exhibit good transient
TYPICAL APPLICATION CIRCUITS
VIN
C1
ON
OFF
1 VIN VOUT 5
ADP170
C2
2 GND
VOUT
3 EN
NC 4
Figure 1. ADP170 with Fixed Output Voltage, 1.8 V
VIN = 2.3V
CIN
1µF
ON
OFF
1 VIN VOUT 5
ADP171
2 GND
3 EN
ADJ 4
VOUT = 1.8V
COUT
1µF
R1
R2
Figure 2. ADP171 with Adjustable Output Voltage
performance and occupy minimal board space. Compared with
commodity types of LDOs, the ADP170/ADP171 provide 20 dB
to 40 dB better power supply rejection ratio (PSRR) at 100 kHz,
making the ADP170/ADP171 an ideal power source for analog-
to-digital converter (ADC) mixed-signal processor systems and
allowing use of smaller size bypass capacitors. In addition, low
output noise performance without the need for an additional
bypass capacitor further reduces printed circuit board (PCB)
component count.
Short-circuit protection and thermal overload protection circuits
prevent damage in adverse conditions. The ADP170/ADP171
are available in tiny 5-lead TSOT for the smallest footprint
solution to meet a variety of portable power applications.
Rev. B
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 ©2009–2010 Analog Devices, Inc. All rights reserved.
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ADP170 pdf, 반도체, 판매, 대치품
ADP170/ADP171
Parameter
OUTPUT NOISE
POWER SUPPLY REJECTION RATIO
Symbol
OUTNOISE
PSRR
Conditions
Min Typ Max Unit
10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 3.0 V
72 μV rms
10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 1.8 V
50 μV rms
10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 1.2 V
40 μV rms
10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 0.8 V
30 μV rms
1 kHz, VIN = 3.6 V, IOUT = 10 mA, VOUT = 0.8 V
73 dB
10 kHz, VIN = 3.6 V, IOUT = 10 mA, VOUT = 0.8 V
70 dB
10 kHz, VIN = (VOUT + 1 V), IOUT = 10 mA to 300 mA
50
dB
100 kHz, VIN = (VOUT + 1 V), IOUT = 10 mA to 300 mA
47
dB
1 The current from the external resistor divider network in the case of adjustable voltage output (as with the ADP171) should be subtracted from the ground current measured.
2 Accuracy when VOUT is connected directly to ADJ. When the VOUT voltage is set by external feedback resistors, the absolute accuracy in adjust mode depends on the
tolerances of resistors used.
3 Based on an end-point calculation using 1 mA and 300 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA.
4 Applies only for output voltages above 1.6 V. Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal
output voltage.
5 Start-up time is defined as the time between the rising edge of EN and 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 3.0 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
Table 2.
Parameter
MINIMUM INPUT AND OUTPUT
CAPACITANCE1
CAPACITOR ESR
Symbol
CMIN
RESR
Conditions
TJ = −40°C to +125°C
TJ = −40°C to +125°C
Min Typ
0.45
0.001
Max Unit
μF
1 The minimum input and output capacitance should be greater than 0.45 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.
Rev. B | Page 4 of 20
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ADP170 전자부품, 판매, 대치품
ADP170/ADP171
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 1 μF, TA = 25°C, unless otherwise noted.
1.810
200
1.805
1.800
1.795
1.790
180
160 ILOAD = 300mA
140
120 ILOAD = 100mA
100
1.785
1.780
1.775
1.770
ILOAD = 100µA
ILOAD = 1mA
ILOAD = 10mA
ILOAD = 100mA
ILOAD = 200mA
ILOAD = 300mA
–40 –5
25
85 125
JUNCTION TEMPERATURE (°C)
Figure 5. Output Voltage vs. Junction Temperature
80 ILOAD = 10mA
60 ILOAD = 1mA
40 ILOAD = 100µA
20 ILOAD = 10µA
0
–40 –5 25 85 125
JUNCTION TEMPERATURE (°C)
Figure 8. Ground Current vs. Junction Temperature
1.804
1.803
1.802
1.801
1.800
1.799
1.798
0.01
0.1 1 10 100
LOAD CURRENT (mA)
Figure 6. Output Voltage vs. Load Current
1k
180
160
140
120
100
80
60
40
20
0
0.01 0.1 1 10 100
LOAD CURRENT (mA)
Figure 9. Ground Current vs. Load Current
1k
1.805
1.804
1.803
1.802
1.801
1.800
1.799
1.798
2.1
ILOAD = 100µA
ILOAD = 1mA
2.3 2.5 2.7
ILOAD = 10mA
ILOAD = 100mA
2.9 3.1
VIN (V)
ILOAD = 200mA
ILOAD = 300mA
3.3 3.5
Figure 7. Output Voltage vs. Input Voltage
180
160 ILOAD = 300mA
140
ILOAD = 100mA
120
100 ILOAD = 10mA
80
60 ILOAD = 1mA
40 ILOAD = 100µA
20
ILOAD = 10µA
0
2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5
VIN (V)
Figure 10. Ground Current vs. Input Voltage
Rev. B | Page 7 of 20
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