Datasheet ADP1611 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 20 V,1.2 MHz Step-Up DC-to-DC Switching Converter |
| Páginas / Página | 20 / 1 — 20 V,1.2 MHz Step-Up. DC-to-DC Switching Converter. ADP1611. FEATURES. … |
| Formato / tamaño de archivo | PDF / 763 Kb |
| Idioma del documento | Inglés |
20 V,1.2 MHz Step-Up. DC-to-DC Switching Converter. ADP1611. FEATURES. GENERAL DESCRIPTION
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20 V,1.2 MHz Step-Up DC-to-DC Switching Converter ADP1611 FEATURES GENERAL DESCRIPTION Fully integrated 1.2 A , 0.23 Ω power switch
The ADP1611 is a step-up dc-to-dc switching converter with an
Pin-selectable 700 kHz or 1.2 MHz PWM frequency
integrated 1.2 A, 0.23 Ω power switch capable of providing an
90% efficiency
output voltage as high as 20 V. With a package height of less
Adjustable output voltage up to 20 V
than 1.1 mm, the ADP1611 is optimal for space-constrained
3% output regulation accuracy
applications such as portable devices or thin film transistor
Adjustable soft start
(TFT) liquid crystal displays (LCDs).
Input undervoltage lockout MSOP 8-lead package
The ADP1611 operates in pulse-width modulation (PWM) current mode with up to 90% efficiency. Adjustable soft start
APPLICATIONS
prevents inrush currents at startup. The pin-selectable switching
TFT LC bias supplies
frequency and PWM current-mode architecture allow excellent
Portable applications
transient response, easy noise filtering, and the use of small,
Industrial/instrumentation equipment
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.
FUNCTIONAL BLOCK DIAGRAM COMP IN 1 6 ERROR AMP REF ADP1611 gm BIAS FB 2 5 SW F/F R Q RAMP GEN S DRIVER COMPARATOR RT 7 OSC SS 8 SOFT START 3 CURRENT- SD SENSE AMPLIFIER 4 GND
04906-001 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. or otherwise under any patent or patent rights of Analog Devices. Trademarks and Tel: 781.329.4700 www.analog.com registered trademarks are the property of their respective owners. Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CURRENT-MODE PWM OPERATION FREQUENCY SELECTION SOFT START ON/OFF CONTROL SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION CHOOSING THE INPUT AND OUTPUT CAPACITORS DIODE SELECTION LOOP COMPENSATION SOFT-START CAPACITOR APPLICATION CIRCUITS STEP-UP DC-TO-DC CONVERTER WITH TRUE SHUTDOWN TFT LCD BIAS SUPPLY SEPIC POWER SUPPLY LAYOUT PROCEDURE OUTLINE DIMENSIONS ORDERING GUIDE
The ADP1611 is a step-up dc-to-dc switching converter with an
Pin-selectable 700 kHz or 1.2 MHz PWM frequency
integrated 1.2 A, 0.23 Ω power switch capable of providing an
90% efficiency
output voltage as high as 20 V. With a package height of less
Adjustable output voltage up to 20 V
than 1.1 mm, the ADP1611 is optimal for space-constrained
3% output regulation accuracy
applications such as portable devices or thin film transistor
Adjustable soft start
(TFT) liquid crystal displays (LCDs).
Input undervoltage lockout MSOP 8-lead package
The ADP1611 operates in pulse-width modulation (PWM) current mode with up to 90% efficiency. Adjustable soft start
APPLICATIONS
prevents inrush currents at startup. The pin-selectable switching
TFT LC bias supplies
frequency and PWM current-mode architecture allow excellent
Portable applications
transient response, easy noise filtering, and the use of small,
Industrial/instrumentation equipment
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.
FUNCTIONAL BLOCK DIAGRAM COMP IN 1 6 ERROR AMP REF ADP1611 gm BIAS FB 2 5 SW F/F R Q RAMP GEN S DRIVER COMPARATOR RT 7 OSC SS 8 SOFT START 3 CURRENT- SD SENSE AMPLIFIER 4 GND
04906-001 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. or otherwise under any patent or patent rights of Analog Devices. Trademarks and Tel: 781.329.4700 www.analog.com registered trademarks are the property of their respective owners. Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CURRENT-MODE PWM OPERATION FREQUENCY SELECTION SOFT START ON/OFF CONTROL SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION CHOOSING THE INPUT AND OUTPUT CAPACITORS DIODE SELECTION LOOP COMPENSATION SOFT-START CAPACITOR APPLICATION CIRCUITS STEP-UP DC-TO-DC CONVERTER WITH TRUE SHUTDOWN TFT LCD BIAS SUPPLY SEPIC POWER SUPPLY LAYOUT PROCEDURE OUTLINE DIMENSIONS ORDERING GUIDE