Preliminary
3A Ultra Low Dropout Linear Regulator
uP7718
Features
General Description
The uP7718 is a 3A ultra low dropout linear regulator Works with 1.2V~5.5V VIN
specifically designed for motherboard, notebook and graphic
Adjustable Output Voltage, Down to 0.8V
1.5% Initial Accuracy
card applications. This device works with dual supplies, a
control input for the control circuitry and a power input as
low as 1.2V for providing current to output. The uP7718
delivers high-current and ultra-low-drop output voltage as
low as 0.8V for applications where VOUT is very close to
VIN.
Excellent Line and Load Regulation
3A Guaranteed Output Current
178mV @ 3A Dropout Voltage
Very Low On-Resistance
The uP7718 features comprehensive control and protection
functions: a power on reset (POR) circuit for monitoring
both control and power inputs for proper operation; an EN
input for enabling or disabling the device, a power OK with
time delay for indicating the output voltage status, a
foldback current limit function, and a thermal shutdown
function.
54mΩ typical
VOUT Pull Low Resistance when Disabled
VOUT Power OK Signal
Fast Transient Response
Low External Component Count
Low Cost and Easy to Use
The uP7718 is available in PSOP-8 package with very low
thermal resistance.
Enable Pin
Over Current and Over Temperature Protection
RoHS Compliant and Halogen Free
Applications
Desktop PCs, Notebooks, and Workstations
Graphic Cards
Ordering Information
Low Voltage Logic Supplies
Order Number Package Type
uP7718ASU8 PSOP-8
Remark
Microprocessor and Chipset Supplies
Split Plane Microprocessor Supplies
Advanced Graphics Cards Supplies
SoundCards and Auxiliary Power Supplies
SMPS Post Regulators
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.
Pin Configuration & Typical Application Circuit
CNTL
EN
POK
VOUT
FB
5VCC
R4
10R
R3
10K
GND
FB
1
2
3
4
8
7
6
5
EN
VOUT
POK
CNTL
VIN
VIN
R2
12.5K
C4
option
VOUT
VOUT
VIN
VIN
C2
4.7uF
C1
1uF
R1
10K
C3
10uF
GND
PSOP-8
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P00, File Name: uP7718-DS-P0000
1