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USR1101

UNISONIC TECHNOLOGIES
Part Number USR1101
Manufacturer UNISONIC TECHNOLOGIES
Description 5V 12V SYNCHRONOUS BUCK PWM DC-DC CONTROLLER
Published May 27, 2014
Detailed Description UNISONIC TECHNOLOGIES CO., LTD USR1101 Preliminary LINEAR INTEGRATED CIRCUIT 5V/12V SYNCHRONOUS BUCK PWM DC-DC CONTR...
Datasheet PDF File USR1101 PDF File

USR1101
USR1101

Overview
UNISONIC TECHNOLOGIES CO.
, LTD USR1101 Preliminary LINEAR INTEGRATED CIRCUIT 5V/12V SYNCHRONOUS BUCK PWM DC-DC CONTROLLER  DESCRIPTION The UTC USR1101 is a high efficiency synchronous buck PWM controller, with operating at fixed 300kHz frequency, Internal soft-start, frequency compensation networks and integrates all of the control, output adjustment, monitoring and protection functions into a single package.
Adjustable over-current protection (OCP) monitors the voltage drop across the RDS(ON) of the lower MOSFET for synchronous buck PWM DC-DC controller.
 FEATURES * Operating with 5V or 12V supply voltage * Drives all low cost N-channel MOSFETs * PWM control mode * 300kHz fixed frequency * Internal soft-start * Over-current fault monitor on MOSFET, no current sense resistor required * RoHS compliant and 100% lead (Pb)-free  ORDERING INFORMATION Ordering Number USR1101G-S08-R Package SOP-8 SOP-8 Packing Tape Reel USR1101G-S08-R (1)Packing Type (2)Package Type (3)Green Package (1) R: Tape Reel (2) S08: SOP-8 (3) G: Halogen Free and Lead Free  MARKING www.
unisonic.
com.
tw Copyright © 2015 Unisonic Technologies Co.
, Ltd 1 of 5 QW-R103-062.
b USR1101  PIN CONFIGURATION Preliminary LINEAR INTEGRATED CIRCUIT BOOT 1 8 NC UGATE 2 GND 3 USR1101 7 OPS 6 FB LGATE 4 5 VCC  PIN DESCRIPTION PIN NO.
1 2 3 4 5 6 7 8 PIN NAME BOOT UGATE GND LGATE VCC FB OPS NC High-Side gate drive boost Upper gate driver output Ground Lower gate drive output Supply voltage Feedback voltage Over-current setting and shutdown No bonding DESCRIPTION UNISONIC TECHNOLOGIES CO.
, LTD www.
unisonic.
com.
tw 2 of 5 QW-R103-062.
b USR1101  BLOCK DIAGRAM Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO.
, LTD www.
unisonic.
com.
tw 3 of 5 QW-R103-062.
b USR1101 Preliminary LINEAR INTEGRATED CIRCUIT  ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 16 V Power Dissipation (TA=25°C) (Note 1) PD 0.
625 W Storage Temperature TSTG -...


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