ADP1612 데이터 시트보기 (PDF) - Analog Devices

부품명

상세내역

제조사

ADP1612

650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters

Analog Devices 

Data Sheet

650 kHz /1.3 MHz Step-Up

PWM DC-to-DC Switching Converters

ADP1612/ADP1613

FEATURES

Current limit

1.4 A for the ADP1612

2.0 A for the ADP 1613

Minimum input voltage

1.8 V for the ADP1612

2.5 V for the ADP1613

Pin-selectable 650 kHz or 1.3 MHz PWM frequency

Adjustable output voltage up to 20 V

Adjustable soft start

Undervoltage lockout

Thermal shutdown

8-lead MSOP

Supported by ADIsimPower™ design tool

ADIsimPower downloadable design tools for boost, coupled-

SEPIC, and SEPIC Cuk configurations

APPLICATIONS

TFT LCD bias supplies

Portable applications

Industrial/instrumentation equipment

TYPICAL APPLICATION CIRCUIT

L1

ADP1612/

VIN

ADP1613

6 VIN

SW 5

ON

OFF

3 EN

CIN

1.3MHz

650kHz

7 FREQ

(DEFAULT)

FB 2

8 SS

COMP 1

CSS

GND

4

D1

VOUT

R1

R2

RCOMP

CCOMP

COUT

Figure 1. Step-Up Regulator Configuration

GENERAL DESCRIPTION

The ADP1612/ADP1613 are step-up dc-to-dc switching con-

verters with an integrated power switch capable of providing

an output voltage as high as 20 V. With a package height of less

than 1.1 mm, the ADP1612/ADP1613 are optimal for space-

constrained applications such as portable devices or thin film

transistor (TFT) liquid crystal displays (LCDs).

The ADP1612/ADP1613 operate in current mode pulse-width

modulation (PWM) with up to 94% efficiency. Adjustable

soft start prevents inrush currents when the part is enabled.

The pin-selectable switching frequency and PWM current-mode

architecture allow for excellent transient response, easy noise

filtering, and the use of small, cost-saving external inductors

and capacitors. Other key features include undervoltage lockout

(UVLO), thermal shutdown (TSD), and logic controlled enable.

The ADP1612/ADP1613 are available in the lead-free

8-lead MSOP.

100

VIN = 5V

fSW = 1.3MHz

90 TA = 25°C

80

70

60

50

ADP1612, VOUT = 12V

40

ADP1612, VOUT = 15V

ADP1613, VOUT = 12V

ADP1613, VOUT = 15V

30

1

10

100

1k

LOAD CURRENT (mA)

Figure 2. ADP1612/ADP1613 Efficiency for Various Output Voltages

Rev. D

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 ©2009–2012 Analog Devices, Inc. All rights reserved.

Share Link: