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ADP3026ARU Datasheet دیتاشیت PDF دانلود

دیتاشیت - Analog Devices - High-Efficiency Notebook Computer Power Supply Controller

شماره قطعه ADP3026ARU
شرح مفصل High-Efficiency Notebook Computer Power Supply Controller
تولید کننده Analog Devices 
آرم Analog Devices 


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ADP3026ARU شرح
PRELIMINARY TECHNICAL DATA
a
High-Efficiency Notebook Computer
Power Supply Controller
Preliminary Technical Data
ADP3026
FEATURES
Wide Input Voltage Range: 6.5 V to 25 V
High Conversion Efficiency > 96%
Integrated Current Sense—No External Resistor Re-
quired
Low Shutdown Current: 14 A (Typical)
Voltage Mode PWM with Input Feed Forward for Fast
Line Transient Response
Dual Synchronous Buck Controllers with PWM/
Power-Saving Mode Operation
Built-In Gate Drive Boost Circuit for Driving Exter-
nal
N-Channel MOSFETs
Two Fixed Output Voltages: 3.3 V, 5 V
PWM Frequency: 300 kHz
Extensive Circuit Protection Functions
28-Lead TSSOP Package
APPLICATIONS
Notebook Computers and PDAs
Portable Instruments
General Purpose DC-DC Converters
GENERAL DESCRIPTION
The ADP3026 is a highly efficient dual synchronous buck
switching regulator controller optimized for converting the
battery or adapter input into the system supply voltages re-
quired in notebook computers. The ADP3026 uses a
dual-mode PWM/Power Saving Mode architecture to maintain
efficiency over a wide load range.
The ADP3026 provides accurate and reliable short circuit
protection using an internal current sense circuit, which re-
duces cost and increases overall efficiency. Other protection
features include programmable soft-start, UVLO, and inte-
grated output undervoltage/overvoltage protection.
VIN
6.5V TO 25V
Q3
L2
5V
Q4
FUNCTIONAL BLOCK DIAGRAM
ADP3026
5V LINEAR
REF
5V
SMPS
3.3V
SMPS
SS5
PWRGD
POWER-ON
RESET
Q1
L1
Q2
3.3V
SS3
REV. PrB
3/12/02
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002

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