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부품번호 | ADP7104 기능 |
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기능 | CMOS LDO | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 28 페이지수
Data Sheet
20 V, 500 mA, Low Noise, CMOS LDO
ADP7104
FEATURES
Input voltage range: 3.3 V to 20 V
Maximum output current: 500 mA
Low noise: 15 µV rms for fixed output versions
PSRR performance of 60 dB at 10 kHz, VOUT = 3.3 V
Reverse current protection
Low dropout voltage: 350 mV at 500 mA
Initial accuracy: ±0.8%
Accuracy over line, load, and temperature: −2%/+1%
Low quiescent current (VIN = 5 V), IGND= 900 μA with 500 mA load
Low shutdown current: <40 µA at VIN = 12 V, stable with small
1 µF ceramic output capacitor
7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V,
5 V, and 9 V
Adjustable output from 1.22 V to VIN − VDO
Foldback current limit and thermal overload protection
User programmable precision UVLO/enable
Power-good indicator
8-lead LFCSP and 8-lead SOIC packages
APPLICATIONS
Regulation to noise sensitive applications: ADC, DAC circuits,
precision amplifiers, high frequency oscillators, clocks,
and PLLs
Communications and infrastructure
Medical and healthcare
Industrial and instrumentation
GENERAL DESCRIPTION
The ADP7104 is a CMOS, low dropout linear regulator that
operates from 3.3 V to 20 V and provides up to 500 mA of
output current. This high input voltage LDO is ideal for
regulation of high performance analog and mixed signal
circuits operating from 19 V to 1.22 V rails. Using an
advanced proprietary architecture, it provides high power
supply rejection, low noise, and achieves excellent line and
load transient response with just a small 1 µF ceramic
output capacitor.
The ADP7104 is available in seven fixed output voltage options
and an adjustable version, which allows output voltages that
range from 1.22 V to VIN − VDO via an external feedback divider.
TYPICAL APPLICATION CIRCUITS
VIN = 8V
CIN +
1µF
ON 100kΩ
OFF
100kΩ
VIN VOUT
SENSE
EN/
UVLO
PG
GND
+ COUT
1µF
VOUT = 5V
100kΩ
PG
Figure 1. ADP7104 with Fixed Output Voltage, 5 V
VIN = 8V
CIN +
1µF
ON 100kΩ
OFF
100kΩ
VIN VOUT
ADJ
EN/
UVLO
PG
GND
40.2kΩ
VOUT = 5V
+ COUT
1µF
13kΩ
100kΩ
PG
Figure 2. ADP7104 with Adjustable Output Voltage, 5 V
The ADP7104 output noise voltage is 15 μV rms and is inde-
pendent of the output voltage. A digital power-good output
allows power system monitors to check the health of the output
voltage. A user programmable precision undervoltage lockout
function facilitates sequencing of multiple power supplies.
The ADP7104 is available in 8-lead, 3 mm × 3 mm LFCSP
and 8-lead SOIC packages. The LFCSP offers a very compact
solution and also provides excellent thermal performance for
applications requiring up to 500 mA of output current in a
small, low-profile footprint.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2011–2012 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.Datasheet4U.com
ADP7104
Data Sheet
Parameter
PROGRAMMABLE EN/UVLO
UVLO Threshold Rising
UVLO Threshold Falling
UVLO Hysteresis Current
Enable Pull-Down Current
Start Threshold
Shutdown Threshold
Hysteresis
OUTPUT NOISE
POWER SUPPLY REJECTION RATIO
Symbol
UVLORISE
UVLOFALL
UVLOHYS
IEN-IN
VSTART
VSHUTDOWN
OUTNOISE
PSRR
Conditions
Min
3.3 V ≤ VIN ≤ 20 V, TJ = −40°C to +125°C
3.3 V ≤ VIN ≤ 20 V, TJ = −40°C to +125°C, 10 kΩ in
series with the enable pin
VEN > 1.25 V, TJ = −40°C to +125°C
EN = VIN
TJ = −40°C to +125°C
TJ = −40°C to +125°C
1.18
7.5
2.45
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 1.8 V
10 Hz to 100 kHz, VIN = 6.3 V, VOUT = 3.3 V
10 Hz to 100 kHz, VIN = 8 V, VOUT = 5 V
10 Hz to 100 kHz, VIN = 12 V, VOUT = 9 V
10 Hz to 100 kHz, VIN = 5.5 V, VOUT = 1.5 V,
adjustable mode
10 Hz to 100 kHz, VIN = 12 V, VOUT = 5 V,
adjustable mode
10 Hz to 100 kHz, VIN = 20 V, VOUT = 15 V,
adjustable mode
100 kHz, VIN = 4.3 V, VOUT = 3.3 V
100 kHz, VIN = 6 V, VOUT = 5 V
10 kHz, VIN = 4.3 V, VOUT = 3.3 V
10 kHz, VIN = 6 V, VOUT = 5 V
100 kHz, VIN = 3.3 V, VOUT = 1.8 V, adjustable mode
100 kHz, VIN = 6 V, VOUT = 5 V, adjustable mode
100 kHz, VIN = 16 V, VOUT = 15 V, adjustable mode
10 kHz, VIN = 3.3 V, VOUT = 1.8 V, adjustable mode
10 kHz, VIN = 6 V, VOUT = 5 V, adjustable mode
10 kHz, VIN = 16 V, VOUT = 15 V, adjustable mode
Typ Max
1.23 1.28
1.13
9.8 12
500
3.2
250
15
15
15
15
18
30
65
50
50
60
60
50
60
60
60
80
80
Unit
V
V
µA
nA
V
V
mV
µV rms
µV rms
µV rms
µV rms
µV rms
µV rms
µV rms
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
1 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.
2 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 3.0 V.
3 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value.
4 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 5.0 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 5.0 V, or 4.5 V.
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
Table 2.
Parameter
Minimum Input and Output Capacitance1
Capacitor ESR
Symbol
CMIN
RESR
Conditions
TA = −40°C to +125°C
TA = −40°C to +125°C
Min
0.7
0.001
Typ Max
0.2
Unit
µF
Ω
1 The minimum input and output capacitance should be greater than 0.7 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 28
Free Datasheet http://www.Datasheet4U.com
4페이지 Data Sheet
ADP7104
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 7.5 V, VOUT = 5 V, IOUT = 10 mA, CIN = COUT = 1 µF, TA = 25°C, unless otherwise noted.
3.35
LOAD = 100µA
LOAD = 1mA
LOAD = 10mA
LOAD = 100mA
3.33 LOAD = 300mA
LOAD = 500mA
3.31
1200
1000
800
LOAD = 100µA
LOAD = 1mA
LOAD = 10mA
LOAD = 100mA
LOAD = 300mA
LOAD = 500mA
600
3.29
400
3.27
200
3.25
–40°C
–5°C
25°C
TJ (°C)
85°C
125°C
Figure 5. Output Voltage vs. Junction Temperature
3.35
3.33
3.31
3.29
3.27
3.25
0.1
1 10 100
ILOAD (mA)
Figure 6. Output Voltage vs. Load Current
3.35
LOAD = 100µA
LOAD = 1mA
LOAD = 10mA
LOAD = 100mA
3.33 LOAD = 300mA
LOAD = 500mA
3.31
1000
3.29
3.27
0
–40°C
–5°C
25°C
TJ (°C)
85°C
125°C
Figure 8. Ground Current vs. Junction Temperature
800
700
600
500
400
300
200
100
0
0.1 1 10 100
ILOAD (mA)
Figure 9. Ground Current vs. Load Current
1200
1000
800
LOAD = 100µA
LOAD = 1mA
LOAD = 10mA
LOAD = 100mA
LOAD = 300mA
LOAD = 500mA
1000
600
400
200
3.25
4
6 8 10 12 14 16 18
VIN (V)
Figure 7. Output Voltage vs. Input Voltage
20
0
4 6 8 10 12 14 16 18 20
VIN (V)
Figure 10. Ground Current vs. Input Voltage
Rev. B | Page 7 of 28
Free Datasheet http://www.Datasheet4U.com
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |