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ADP1708 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADP1708은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 ADP1708 기능
기능 (ADP1706 - ADP1708) CMOS Linear Regulator
제조업체 Analog Devices
로고 Analog Devices 로고


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ADP1708 데이터시트, 핀배열, 회로
FEATURES
Maximum output current: 1 A
Input voltage range: 2.5 V to 5.5 V
Low shutdown current: <1 μA
Low dropout voltage: 345 mV @ 1 A load
Initial accuracy: ±1%
Accuracy over line, load, and temperature: ±2.5%
16 fixed output voltage options with soft start:
0.75 V to 3.3 V (ADP1706)
16 fixed output voltage options with tracking
0.75 V to 3.3 V (ADP1707)
Adjustable output voltage option:
0.8 V to 5.0 V (ADP1708)
Stable with small 4.7 μF ceramic output capacitor
Excellent load/line transient response
Current limit and thermal overload protection
Logic-controlled enable
Available in an 8-lead, exposed paddle SOIC and
3 mm × 3 mm, 8-lead exposed paddle LFCSP
APPLICATIONS
Notebook computers
Memory components
Telecommunications equipment
Network equipment
DSP/FPGA/microprocessor supplies
Instrumentation equipment/data acquisition systems
GENERAL DESCRIPTION
The ADP1706/ADP1707/ADP1708 are CMOS, low dropout
linear regulators that operate from 2.5 V to 5.5 V and provide
up to 1 A of output current. Using an advanced proprietary
architecture, they provide high power supply rejection and
achieve excellent line and load transient response with a small
4.7 μF ceramic output capacitor.
The ADP1706/ADP1707 are available in 16 fixed output volt-
age options. The ADP1708 is available in an adjustable version,
which allows output voltages that range from 0.8 V to 5.0 V via
an external divider. The ADP1706 allows an external soft start
capacitor to be connected to program the start-up time; the
1 A, Low Dropout,
CMOS Linear Regulator
ADP1706/ADP1707/ADP1708
TYPICAL APPLICATION CIRCUITS
VIN = 5V
4.7µF
ADP1706
10nF
1 EN
SS 8
2 GND SENSE 7
3 IN
OUT 6
VOUT = 3.3V
4 IN
OUT 5
4.7µF
Figure 1. ADP1706 with Fixed Output Voltage, 3.3 V
ADP1707
VIN = 5V
4.7µF
1 EN
2 GND
3 IN
4 IN
TRK 8
SENSE 7
OUT 6
OUT 5
VOUT (V)
VTRK
VOUT
4.7µF
3
2
1
0 12345
VTRK (V)
Figure 2. ADP1707 with Output Voltage Tracking
VIN = 5V
4.7µF
ADP1708
1 EN
2 GND
3 IN
4 IN
ADJ 8
SENSE 7
OUT 6
OUT 5
R2
R1
VOUT = 0.8V(1 + R1/R2)
4.7µF
Figure 3. ADP1708 with Adjustable Output Voltage, 0.8 V to 5.0 V
ADP1707 and ADP1708 contain internal soft start capacitors
that give a typical start-up time of 100 μs. The ADP1707
includes a tracking feature that allows the output to follow an
external voltage rail or reference.
The ADP1706/ADP1707/ADP1708 are available in an 8-lead,
exposed paddle SOIC package and an 8-lead, 3 mm × 3 mm
exposed paddle LFCSP, making them not only very compact
solutions but also providing excellent thermal performance for
applications requiring up to 1 A of output current in a small,
low profile footprint.
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
©2007 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.datasheet4u.com/




ADP1708 pdf, 반도체, 판매, 대치품
ADP1706/ADP1707/ADP1708
Parameter
OUTPUT NOISE
POWER SUPPLY REJECTION RATIO
Symbol
OUTNOISE
PSRR
Test Conditions
10 Hz to 100 kHz, VOUT = 0.75 V
10 Hz to 100 kHz, VOUT = 3.3 V
1 kHz, VOUT = 0.75 V
1 kHz, VOUT = 3.3 V
Min Typ Max Unit
125 μV rms
450 μV rms
70 dB
56 dB
1 Accuracy when OUT is connected directly to ADJ. When OUT voltage is set by external feedback resistors, absolute accuracy in adjust mode depends on the tolerances
of resistors used.
2 Based on an end-point calculation using 10 mA and 1 A loads. See Figure 11 for typical load regulation performance for loads less than 10 mA.
3 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 above 2.5 V.
4 Start-up time is defined as the time between the rising edge of EN to OUT being at 95% of its nominal value.
5 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 1.0 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 1.0 V, or 0.9 V.
Rev. 0 | Page 4 of 20
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ADP1708 전자부품, 판매, 대치품
ADP1706/ADP1707/ADP1708
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.8 V, IOUT = 100 mA, CIN = 4.7 μF, COUT = 4.7 μF, TA = 25°C, unless otherwise noted.
3.32
3.31
ILOAD = 100µA
ILOAD = 10mA
1400
1200
3.30
3.29
3.28
3.27
3.26
3.25
ILOAD = 100mA
ILOAD = 300mA
ILOAD = 1A
ILOAD = 500mA
1000
800
600
400
200
ILOAD = 10mA
ILOAD = 1A
ILOAD = 500mA
ILOAD = 300mA
ILOAD = 100mA
ILOAD = 100µA
3.24
–40
10
60 110
TJ (°C)
Figure 10. Output Voltage vs. Junction Temperature
0
–40 10
60 110
TJ (°C)
Figure 13. Ground Current vs. Junction Temperature
3.315
3.310
3.305
3.300
3.295
3.290
3.285
3.280
3.275
3.270
0.1
1 10 100
ILOAD (mA)
Figure 11. Output Voltage vs. Load Current
1000
3.32
3.31
3.30
3.29
3.28
3.27
ILOAD = 100µA
ILOAD = 500mA
ILOAD = 1A
ILOAD = 10mA
ILOAD = 100mA
ILOAD = 300mA
3.26
3.25
3.8
4.2 4.6 5.0
VIN (V)
Figure 12. Output Voltage vs. Input Voltage
5.4
1400
1200
1000
800
600
400
200
0
0.1 1 10 100
ILOAD (mA)
Figure 14. Ground Current vs. Load Current
1000
2100
1800
1500
1200
900
ILOAD = 1A
ILOAD = 500mA
ILOAD = 300mA
ILOAD = 100mA
ILOAD = 10mA
ILOAD = 100µA
600
300
0
3.6 4.0 4.4 4.8 5.2
VIN (V)
Figure 15. Ground Current vs. Input Voltage
Rev. 0 | Page 7 of 20
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