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ADP1613 Datasheet

(ADP1612 / ADP1613) 650 KHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converter

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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
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
90
fSW = 1.3MHz
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. 0
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.
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.


Analog Devices Semiconductor Electronic Components Datasheet

ADP1613 Datasheet

(ADP1612 / ADP1613) 650 KHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converter

No Preview Available !

ADP1613 pdf
wwAwD.DPat1aS6he1e2t4/UA.coDmP1613
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuit ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Thermal Resistance ...................................................................... 4
Boundary Condition.................................................................... 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 11
Current-Mode PWM Operation .............................................. 11
Frequency Selection ................................................................... 11
Soft Start ...................................................................................... 11
Thermal Shutdown (TSD)......................................................... 12
REVISION HISTORY
4/09—Revision 0: Initial Version
UnderVoltage Lockout (UVLO)............................................... 12
Enable/Shutdown Control ........................................................ 12
Applications Information .............................................................. 13
Setting the Output Voltage........................................................ 13
Inductor Selection ...................................................................... 13
Choosing the Input and Output Capacitors ........................... 13
Diode Selection........................................................................... 14
Loop Compensation .................................................................. 14
Soft Start Capacitor .................................................................... 15
Typical Application Circuits ......................................................... 16
Step-Up Regulator...................................................................... 16
Step-Up Regulator Circuit Examples....................................... 16
SEPIC Converter ........................................................................ 22
TFT LCD Bias Supply ................................................................ 22
PCB Layout Guidelines.................................................................. 24
Outline Dimensions ....................................................................... 25
Ordering Guide .......................................................................... 25
Rev. 0 | Page 2 of 28


Part Number ADP1613
Description (ADP1612 / ADP1613) 650 KHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converter
Maker Analog Devices
Total Page 28 Pages
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