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ADP1611

Analog Devices
Part Number ADP1611
Manufacturer Analog Devices
Description 1.2 MHz Step-Up DC-to-DC Switching Converter
Published Nov 7, 2006
Detailed Description www.DataSheet4U.com 20 V,1.2 MHz Step-Up DC-to-DC Switching Converter ADP1611 FEATURES Fully integrated 1.2 A , 0.23 Ω ...
Datasheet PDF File ADP1611 PDF File

ADP1611
ADP1611

Overview
www.
DataSheet4U.
com 20 V,1.
2 MHz Step-Up DC-to-DC Switching Converter ADP1611 FEATURES Fully integrated 1.
2 A , 0.
23 Ω power switch Pin-selectable 700 kHz or 1.
2 MHz PWM frequency 90% efficiency Adjustable output voltage up to 20 V 3% output regulation accuracy Adjustable soft start Input undervoltage lockout MSOP 8-lead package GENERAL DESCRIPTION The ADP1611 is a step-up dc-to-dc switching converter with an integrated 1.
2 A, 0.
23 Ω power switch capable of providing an output voltage as high as 20 V.
With a package height of less than 1.
1 mm, the ADP1611 is optimal for space-constrained applications such as portable devices or thin film transistor (TFT) liquid crystal displays (LCDs).
The ADP1611 operates in pulse-width modulation (PWM) current mode with up to 90% efficiency.
Adjustable soft start prevents inrush currents at startup.
The pin-selectable switching frequency and PWM current-mode architecture allow excellent transient response, easy noise filtering, and the use of small, cost-saving external inductors and capacitors.
The ADP1611 is offered in the Pb-free 8-lead MSOP and operates over the temperature range of −40°C to +85°C.
APPLICATIONS TFT LC bias supplies Portable applications Industrial/instrumentation equipment FUNCTIONAL BLOCK DIAGRAM COMP 1 IN 6 REF FB 2 ERROR AMP gm BIAS ADP1611 F/F RAMP GEN COMPARATOR RT 7 SS 8 SD 3 OSC SOFT START CURRENTSENSE AMPLIFIER 4 5 SW R Q S DRIVER GND Figure 1.
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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.
O.
Box 9106, Norwood, MA 02062-9106, U.
...


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