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ADP1613-12-EVALZ Datenblatt(PDF) 1 Page - Analog Devices

Teilenummer ADP1613-12-EVALZ
Bauteilbeschribung  650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters
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Direct Link  http://www.analog.com
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650 kHz /1.3 MHz Step-Up
PWM DC-to-DC Switching Converters
ADP1612/ADP1613
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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 Analog Devices, Inc. All rights reserved.
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
APPLICATIONS
TFT LCD bias supplies
Portable applications
Industrial/instrumentation equipment
TYPICAL APPLICATION CIRCUIT
ADP1612/
ADP1613
6
3
7
8
5
2
1
4
VIN
EN
FREQ
SS
SW
FB
COMP
GND
ON
OFF
1.3MHz
650kHz
(DEFAULT)
VOUT
VIN
L1
CIN
CSS
COUT
CCOMP
RCOMP
R1
R2
D1
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
90
80
70
60
50
40
30
1
10
100
1k
LOAD CURRENT (mA)
VIN = 5V
fSW = 1.3MHz
TA = 25°C
ADP1612, VOUT = 12V
ADP1612, VOUT = 15V
ADP1613, VOUT = 12V
ADP1613, VOUT = 15V
Figure 2. ADP1612/ADP1613 Efficiency for Various Output Voltages


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