ADP1720-EP Datasheet, PDF (1/12 Pages) Analog Devices – 50 mA, High Voltage, Micropower Linear Regulator

Data Sheet
FEATURES
Wide input voltage range: 4 V to 28 V
Maximum output current: 50 mA
Low light load current
28 µA at 0 µA load
35 µA at 100 µA load
Low shutdown current: 0.7 µA
Low dropout voltage: 275 mV @ 50 mA load
Initial accuracy: ±0.5%
Accuracy over line, load, and temperature: ±2%
Stable with small 1 µF ceramic output capacitor
Fixed 3.3 V and 5.0 V output voltage options
Adjustable output voltage option: 1.225 V to 5.0 V
Current limit and thermal overload protection
Logic controlled enable
Space-saving MSOP package
ENHANCED PRODUCT FEATURES
Enhanced processing (EP) for −55°C to +125°C operation
APPLICATIONS
DC-to-dc post regulation
PCMCIA regulation
Keep-alive power in portable equipment
Industrial applications
Aeronautic and military operating temperature environment
GENERAL DESCRIPTION
The ADP1720-EP is a high voltage, micropower, low dropout
linear regulator. Operating over a very wide input voltage range
of 4 V to 28 V, the ADP1720-EP can provide up to 50 mA of
output current. With just 28 µA of quiescent supply current and a
micropower shutdown mode, this device is ideal for applications
that require low quiescent current.
The ADP1720-EP is available in fixed output voltages of 3.3 V
and 5.0 V. An adjustable version is also available, which allows
the output to be set anywhere between 1.225 V and 5.0 V. An
enable function that allows external circuits to turn on and turn
off the ADP1720 output is available. For automatic startup, the
enable (EN) pin can be connected directly to the input rail.
50 mA, High Voltage,
Micropower Linear Regulator
ADP1720-EP
TYPICAL APPLICATION CIRCUITS
V_IN = 28V
1µF
V_OUT = 5V
1µF
ADP1720-EP
FIXED
1 GND
2 IN
3 OUT
4 EN
GND 8
GND 7
GND 6
GND 5
Figure 1. ADP1720-EP with Fixed Output Voltage, 5.0 V
R2
R1
V_IN = 12V
1µF
V_OUT =
1.225V(1 + R1/R2)
1µF
ADP1720-EP
ADJUSTABLE
1 ADJ
2 IN
3 OUT
4 EN
GND 8
GND 7
GND 6
GND 5
Figure 2. ADP1720-EP with Adjustable Output Voltage, 1.225 V to 5.0 V
The ADP1720-EP is optimized for stable operation with small
1 µF ceramic output capacitors, allowing for good transient
performance while occupying minimal board space.
The ADP1720-EP operates from –55°C to +125°C and uses
current limit protection and thermal overload protection
circuits to prevent damage to the device in adverse conditions.
Available in a small MSOP package, the ADP1720-EP provides
a compact solution with low thermal resistance.
Additional application and technical information can be found
in the ADP1720 data sheet.
Rev. A
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