uP9301
5V/12V Synchronous-Rectified
Buck Controller with Reference Input
Features
General Description
The uP9301 is a compact synchronous-rectified buck ! Operate from 5V or 12V Supply Voltage
controller specifically designed to operate from 5V or 12V
supply voltage and to deliver high quality output voltage as
low as 0.55V. The uP9301 operates at fixed 200/300kHz
frequency and provides an optimal level of integration to
reduce size and cost of the power supply.
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"
"
3.3V to 12V VIN Input Range
0.6 VREF with 1.5% Accuracy
Output Range from VREF to 80% of VIN
! Support Tracking Mode and Stand Alone Mode
Operation
The uP9301 supports both tracking mode and stand-alone
mode operation. The output voltage is tightly regulated to
the external reference voltage from 0.55V to 3.0Vat tracking
mode or to internal 0.6V reference at stand-alone mode.
! Simple Single-Loop Control Design
"
"
Voltage-Mode PWM Control
Fast Transient Response
! High-Bandwidth Error Amplifier
0% to 80% Duty Cycle
! Lossless, Programmable Over Current Protection
Uses Lower MOSFET RDS(ON)
This controller integrates internal MOSFET drivers that
support 12V+12V bootstrapped voltage for high efficiency
power conversion. The bootstrap diode is built-in to simplify
the circuit design and minimize external part count.
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"
! 200/300kHz Fixed Frequency Oscillator
! Internal Soft Start
! Integrated Bootstrap Diode
! RoHS Compliant and Halogen Free
Other features include internal softstart, under voltage
protection, over current protection and shutdown function.
With aforementioned functions, this part provides
customers a compact, high efficiency, well-protected and
cost-effective solutions. This part is available in (P)SOP -
8L packages.
Applications
! Power Supplies for Microprocessors or Subsystem
Power Supplies
! Cable Modems, Set Top Boxes, and xDSL
Modems
! Industrial Power Supplies; General Purpose
Supplies
! 5V or 12V Input DC-DC Regulators
! Low Voltage Distributed Power Supplies
Ordering Information
Order Number
uP9301PSU8
uP9301QSU8
uP9301RSU8
uP9301SSU8
uP9301TSU8
uP9301USU8
uP9301VSA8
uP9301WSA8
Package
PSOP-8L
Top Marking
Remark
uP9301P
uP9301Q
uP9301R
uP9301S
uP9301T
uP9301U
uP9301V
uP9301W
200kHz / linear OCP
200kHz / fixed OCP @ 375mV
200kHz / fixed OCP @ 225mV
300kHz / linear OCP
300kHz / fixed OCP @ 375mV
300kHz / fixed OCP @ 225mV
300kHz / fixed OCP @ 150mV
300kHz / fixed OCP @ 225mV
SOP-8L
Note: uPI products are compatible with the current IPC/JEDEC J-STD-020 requirements. They are halogen-free, RoHS
compliant and 100% matte tin (Sn) plating that are suitable for use in SnPb or Pb-free soldering processes.
uP9301-DS-F0001, May 2015
www.upi-semi.com
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