uP1735
3A, 23V, High-Efficiency
Synchronous-Rectified Buck Converter
Features
General Description
The uP1735 is a high-efficiency synchronous-rectified
buck converter with internal power switch. With internal
low RDS(ON) switches, the high-efficiency buck converter is
capable of delivering 3A output current over a wide input
voltage range from 4.5V to 23V. The output voltage is
adjustable from 0.8V to 20V by a voltage divider. Other
features for the buck converter include adjust soft-start,
chip enable, over-voltage, under-voltage, over-
temperature and over-current protections. It is available
in a space saving PSOP-8L package.
4.5V to 23V Input Voltage Range
3A Output Current
Accurate Reference: 0.8V (+/- 1.5%)
Up to 93% Conversion Efficiency
Integrated Low RDS(ON) Upper and Lower
MOSFET Switches: 100mΩ
Current Mode PWM Operation
Constant Fixed-Frequency Operation:
340kHz
650kHz
1.2MHz
Applications
Battery-Powered Portable Devices
Programmable Soft-Start
MP3 Players
Integrated Boot Diode
Digital Still Cameras
Frequency Decay Mode During UVP
Over Voltage and Under Voltage Protection
Over Current and Over Temperature Protection
PSOP-8L Package
Wireless and DSL Modems
Personal Information Appliances
802.11 WLAN Power Supplies
FPGA/ASIC Power Supplies
Laptop, Palmtops, Notebook Computers
Portable Information Appliances
RoHS Compliant and Halogen Free
Pin Configuration
BOOT
VIN
1
2
3
4
8
7
6
5
SS
EN
GND
LX
COMP
FB
GND
PSOP - 8
Ordering Information
Order Number
uP1735PSU8
uP1735QSU8
uP1735RSU8
Package Type
Top Marking
uP1735P
uP1735Q
uP1735R
Remark
340kHz
650kHz
1.2MHz
PSOP-8L
Status:
In Production: uP1735PSU8
Others: Please check the sample/production availability with uPI representatives.
Note:
uPI products are compatible with the current IPC/JEDEC J-STD-020 requirement. They are halogen-free, RoHS
compliant and 100% matte tin (Sn) plating that are suitable for use in SnPb or Pb-free soldering processes.
uP1735-DS-F0002, Mar. 2017
www.upi-semi.com
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