500 mA, Low Dropout,
CMOS Linear Regulator
ADP1715/ADP1716
FEATURES
TYPICAL APPLICATION CIRCUITS
Maximum output current: 500 mA
Input voltage range: 2.5 V to 5.5 V
Low shutdown current: <1 μA
Low dropout voltage:
250 mV @ 500 mA load
ADP1715
1
2
3
4
8
7
6
5
EN
IN
GND
GND
GND
GND
V
= 5V
IN
OUT
SS
2.2µF
= 3.3V
V
OUT
50 mV @ 100 mA load
2.2µF
10nF
Initial accuracy: 1ꢀ
Accuracy over line, load, and temperature: 3ꢀ
16 fixed output voltage options with soft start:
0.75 V to 3.3 V (ADP1715)
Figure 1. ADP1715 with Fixed Output Voltage, 3.3 V
ADP1715
ADJUSTABLE
Adjustable output voltage option: 0.8 V to 5.0 V
(ADP1715 Adjustable)
16 fixed output voltage options with tracking:
0.75 V to 3.3 V (ADP1716)
1
2
3
4
8
7
6
5
EN
GND
GND
GND
GND
V
= 5V
IN
IN
OUT
ADJ
2.2µF
= 0.8(1 + R1/R2)
R1
V
OUT
Stable with small 2.2 μF ceramic output capacitor
Excellent load/line transient response
Current limit and thermal overload protection
Logic controlled enable
R2
2.2µF
Figure 2. ADP1715 with Adjustable Output Voltage, 0.8 V to 5.0 V
8-lead thermally enhanced MSOP package
ADP1716
V
(V)
OUT
APPLICATIONS
1
2
3
4
8
7
6
5
EN
GND
GND
GND
GND
3
2
1
V
= 5V
IN
IN
Notebook computers
Memory components
Telecommunications equipment
Network equipment
OUT
TRK
2.2µF
OUT
V
0
1
2
3
4
5
2.2µF
V
= 0V TO 5V
V
(V)
TRK
TRK
DSP/FPGA/μP supplies
Figure 3. ADP1716 with Output Voltage Tracking
Instrumentation equipment/data acquisition systems
GENERAL DESCRIPTION
between 0.75 V and 3.3 V; the adjustable output voltage can
be set to any value between 0.8 V and 5.0 V by an external
voltage divider connected from OUT to ADJ. The variable
soft start uses an external capacitor at SS to control the
output voltage ramp. Tracking limits the output voltage to
the at-or-below voltage at the TRK pin.
The ADP1715/ADP1716 are low dropout, CMOS linear
regulators that operate from 2.5 V to 5.5 V and provide up to
500 mA of output current. Using an advanced proprietary
architecture, they provide high power supply rejection and
achieve excellent line and load transient response with just a
small 2.2 μF ceramic output capacitor.
The ADP1715/ADP1716 are available in 8-lead thermally
enhanced MSOP packages, making them not only a very
compact solution but also providing excellent thermal
performance for applications requiring up to 500 mA of output
current in a small, low profile footprint.
Three versions of this part are available, one with fixed
output voltage options and variable soft start (ADP1715),
one with adjustable output voltage and fixed soft start
(ADP1715 Adjustable), and one with voltage tracking in
fixed output voltage options (ADP1716). The fixed output
voltage options are internally set to one of sixteen values
Rev. 0
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