SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER - UTC
Description
UNISONIC TECHNOLOGIES CO.
, LTD P1484
3A, 23V, 340KHZ SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
DESCRIPTION SOP-8
LINEAR INTEGRATED CIRCUIT
The UTC P1484 is a synchronous buck regulator.
The device provides3A of continuous load current over a wide input voltage of 5V~23V.
Current mode control provides fast transient response and cycle-bycycle current limit.
An adjustable soft-start prevents inrush current at turn-on The UTC P1484 can provide low-ripple power, high efficiency, and perfect transient characteristics.
The duty ratio varies linearly from 0% to 92% in the PWM control.
The error amplifier circuit and soft-start circuit included in this device can prevent overshoot at startup.
An enable function, an over current protect (OCP) function and short circuit protect (SCP) are also build inside, and when OCP happens, the operation frequency will be reduced.
FEATURES
* 3A Output Current * Wide 6V~23V Operating Input Range * Integrated Power MOSFET Switches * Programmable Soft-Start * Stable with Low ESR Ceramic Output Capacitors * Fixed 340KHz Frequency * Cycle-by-Cycle Over Current Protection
ORDERING INFORMATION
Ordering Number Lead Free Halogen Free P1484L-S08-R P1484G-S08-R P1484L-S08-T P1484G-S08-T Package SOP-8 SOP-8 Packing Tape Reel Tube
www.
unisonic.
com.
tw Copyright © 2013 Unisonic Technologies Co.
, Ltd
1 of 6
QW-R103-060.
B
Free Datasheet http://www.
Datasheet4U.
com
P1484
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NAME NC VIN SW GND FB COMP EN SS DESCRIPTION No Bonding IC power supply pin.
Power Switching Output.
Ground.
Feedback Input.
Compensation Node.
Enable Input.
Soft-Start Control Input.
PIN NO.
1 2 3 4 5 6 7 8
UNISONIC TECHNOLOGIES CO.
, LTD
www.
unisonic.
com.
tw
2 of 6
QW-R103-060.
B
Free Datasheet http://www.
Datasheet4U.
com
P1484
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO.
, LTD
www.
unisonic.
com.
tw
3 of 6
QW-R103-060.
B
Free Datasheet http://www.
Datasheet4U.
com
P1484
ABSOLUT...
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