Ordering Information appears at end of data sheet.

Features

●

1.3MHz Switching Frequency

●

Low VCESAT Switch: 330mV at 1.1A

●

High Output Voltage: Up to 40V

●

Wide Input Range: 2.7V to 16V

●

Dedicated Soft-Start Pin

● Uses Small Surface Mount Components

● Low Shutdown Current: <1µA

● Low Profile (1mm) ThinSOT™ Package

● Low Profile (0.75mm) 8-Lead (3mm × 2mm) Dual

Flat No Lead (DFN) Package

Applications

● Digital Cameras

● White LED Power Supplies

● Cellular Phones

● Medical Diagnostic Equipment

● Local 5V or 12V Supplies

● Thin Film Transistor (TFT)- Liquid Crystal Display

(LCD) Bias Supplies

● x Digital Subscriber Line (xDSL) Power Supplies

Description

The

ADPL21610 switching regulators combine a 42V,

1.1A switch with a soft-start function. The ADPL21610

switches at 1.3MHz, allowing the use of tiny, low-cost and

low-height inductors and capacitors. High inrush current

at start-up is eliminated using the programmable soft-start

function. A single external capacitor sets the current ramp

rate. A constant-frequency current mode pulse-width

modulator (PWM) architecture results in low, predictable

output noise that is easy to filter.

The high-voltage switch on the ADPL21610 is rated

at 42V, making the devices ideal for boost converters

up to 40V, as well as SEPIC and flyback designs. The

ADPL21610 is available in a low-profile (1mm) 6-lead

Small outline transistor (SOT)-23 package and tiny 3mm

× 2mm DFN package.

Figure 1. Lithium-Ion to 6V Step-Up DC/DC Converter

Figure 2. Efficiency vs. Load Current

Rev 0; 1/26

1.1A Step-Up DC/DC

Converter with Integrated Soft-Start

ADPL21610

One Analog Way, Wilmington, MA 01887 U.S.A. |

Tel: 781.329.4700

|

© 2026 Analog Devices, Inc. All rights reserved.

© 2026 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

Typical Application

IOUT (mA)

50 100

200

300

400

500

600

700

50

70

65

60

55

75

80

85

90

95

VIN = 4.2V

VIN = 3.3V

VIN = 2.7V

GND

VIN

SW

SHDN

SHDN

FB

VIN

2.7V TO 4.2V

D1

L1

2.2μH

R1

501kΩ

ADPL21610

C2

15µF

C3

1.8pF

C1

2.2µF

R2

133kΩ

VOUT

6V

275mA AT VIN = 2.7V

490mA AT VIN = 3.8V

590mA AT VIN = 4.2V

C1, C2: X5R OR X7R, 6.3V

D1: ON SEMICONDUCTOR MBRM120

L1: SUMIDA CR43-2R2

SS

C4

0.047µF