500 mA, Low Dropout,

CMOS Linear Regulator

ADP1715/ADP1716

Rev. 0

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FEATURES

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

50 mV @ 100 mA load

Initial accuracy: ±1%

Accuracy over line, load, and temperature: ±3%

16 fixed output voltage options with soft start:

0.75 V to 3.3 V (ADP1715)

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)

Stable with small 2.2 μF ceramic output capacitor

Excellent load/line transient response

Current limit and thermal overload protection

Logic controlled enable

8-lead thermally enhanced MSOP package

APPLICATIONS

Notebook computers

Memory components

Telecommunications equipment

Network equipment

DSP/FPGA/μP supplies

Instrumentation equipment/data acquisition systems

TYPICAL APPLICATION CIRCUITS

GND

1

GND

2

GND

3

GND

4

8

7

6

EN

IN

OUT

SS

5

ADP1715

10nF

2.2µF

2.2µF

Figure 1. ADP1715 with Fixed Output Voltage, 3.3 V

GND

1

GND

2

GND

3

GND

4

8

7

6

EN

IN

OUT

ADJ

5

ADP1715

ADJUSTABLE

2.2µF

2.2µF

R1

R2

Figure 2. ADP1715 with Adjustable Output Voltage, 0.8 V to 5.0 V

GND

1

GND

2

GND

3

GND

4

8

7

6

EN

IN

OUT

TRK

5

ADP1716

2.2µF

2.2µF

3

2

1

0

123

45

Figure 3. ADP1716 with Output Voltage Tracking

GENERAL DESCRIPTION

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.

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

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 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.