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Analog Devices Semiconductor Electronic Components Datasheet

ADP1720 Datasheet

High-Voltage Micro-power LDO

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ADP1720 pdf
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PRELIMINARY TECHNICAL DATA
FEATURES
Wide Input Voltage Range: 4V to 28V
Low Quiescent Current: 25µA
±1% Initial Accuracy
Very Low Dropout Voltage:
300 mV @ 50mA
Fixed 3.3V and 5V Voltage Options
Adjustable Output from 1.2V to 5.0V
Optimized for Small 1µF Ceramic Capacitors
Short Circuit Protection
Thermal Overload Protection
Spacing-saving Thermally Enhanced MSOP package
APPLICATIONS
Industrial Applications
Battery-Power Regulators
50mA High-Voltage
Micro-power LDO in MSOP
ADP1720
GENERAL DESCRIPTION
The ADP1720 is a high-voltage, micro-power, low dropout
linear regulator. Designed for robust operation, the ADP1720
includes current limiting and short-circuit protection, and
thermal overload protection . With just 25µA of quiescent
supply current and a micro-power shutdown mode, this device
is ideal for applications that require low quiescent current. The
small thermally-enhanced MSOP package and 1µF ceramic
output capacitor provides a compact solution with low thermal
resistance for high power dissipation.
The ADP1720 is available in fixed output voltages of 3.3V and
5V, or its output voltage can be adjusted over a range of 1.2V to
5V. The ADP1720 operates over the -40°C to 125°C ambient
temperature range.
TYPICAL APPLICATION CIRCUIT
Figure 1. ADP1720 typical operation circuit for fixed output
voltage options.
Figure 2. ADP1720 typical operation circuit for variable
output voltage options.
Rev. PrA
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. Trademarks and
registered trademarks are the property of their respective owners.
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 © 2006 Analog Devices, Inc. All rights reserved.
Rev. PrA | Page 1 of 9


Analog Devices Semiconductor Electronic Components Datasheet

ADP1720 Datasheet

High-Voltage Micro-power LDO

No Preview Available !

ADP1720 pdf
PRELIMINARY TECHNICAL DATA
ADP1720
ADP1720 TARGET SPECIFICATIONS
Table 1. Electrical Characteristics
VIN=12V, TA = 25°C, BOLD values indicate spec applies over TJ=-40°C to 125°C, unless otherwise noted.
Parameter
Conditions
Min Typ Max Unit
Input Voltage
4 28 V
GND Pin Current
Output Voltage Accuracy
ADJ Pin Voltage
ADJ Inupt Bias Current
Line Regulation
Load Regulation
Ripple Rejection
Dropout Voltage1
Current Limit Threshold
Thermal Shutdown
Temperature
IOUT = 0mA
IOUT = 1mA
IOUT = 10mA
IOUT = 50mA
IOUT=100µA
4V VIN28V, IOUT = 100µA to 50mA
4V VIN28V, IOUT = 100µA to 50mA
IOUT=100µA
VADJ=VOUT, 4V VIN 28V
IOUT = 100µA to 50mA
VADJ=VOUT, 4V VIN 28V
IOUT = 100µA to 50mA
VADJ=VOUT
VIN = 4V to 28V, IOUT = 1mA
1mA < IOUT < 50mA
F=120Hz, ILOAD=50mA
IOUT = 1mA, VIN = 4V
IOUT = 10mA, VIN = 4V
IOUT = 50mA, VIN = 4V
VOUT = 90% of nominal setpoint
TJ rising, Hysteresis = 15°C
-1
-2
-3
1.188
1.176
25
100
400
1800
1.2
50
180
700
3300
+1
+2
+3
1.212
1.224
µA
µA
µA
µA
%
%
%
1.164
1.136
30 100 nA
±0.15
%/V
0.01 %/V
65 75
dB
100 190 mV
200 350
300 550
60 85
120 mA
150 °C
Shutdown Supply Current EN = GND
3 5 µA
EN Input Logic High
EN Input Logic Low
EN Input Leakage Current
4V VIN 28V
4V VIN 28V
EN = IN or GND
1.5
-1 0
V
0.4 V
+1 µA
1 Dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. Also Dropout
voltage does not apply to fixed output voltage options below 4V.
2All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC). Typical values are at TA = 25°C.
Specifications subject to change without notice.
3Current limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, for a 1.0V
output voltage, the current limit is defined as the current that causes the output voltage to drop to 90% of 1V, or 0.9V.
Rev. PrA | Page 2 of 9


Part Number ADP1720
Description High-Voltage Micro-power LDO
Maker Analog Devices
Total Page 9 Pages
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