uP8801S
3A Ultra Low Dropout Linear Regulator
Features
General Description
The uP8801S 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 uP8801S
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
300mV @ 3A Dropout Voltage
Very Low On-Resistance
The uP8801S features comprehensive control and
protection functions: a power on reset (POR) circuit for
monitoring both control and power inputs for proper
operation; an ENinput 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.
100mΩ 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 uP8801S is available in PSOP - 8Lor WDFN3x3 - 10L
packages with very low thermal resistance.
Over Current and Over Temperature Protection
RoHS Compliant and Halogen Free
Applications
Ordering Information
Desktop PCs, Notebooks, and Workstations
Graphic Cards
Order Number
uP8801SSW8
uP8801SDDA
Package
PSOP-8L
Top Marking
uP8801S
Low Voltage Logic Supplies
Microprocessor and Chipset Supplies
Split Plane Microprocessor Supplies
Advanced Graphics Cards Supplies
SoundCards and Auxiliary Power Supplies
SMPS Post Regulators
WDFN3x3-10L
uP8801S
Note:
(1) Please check the sample/production availability with
uPI representatives.
(2) 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
5VCC
POK
EN
1
2
3
4
8
7
6
5
GND
FB
R4
10R
CNTL
4
GND
EN
POK
VOUT
FB
VIN
VOUT
NC
2
3
5
1
6
7
R3
CNTL
10K
VOUT
VIN
VIN
PSOP-8L
R2
12.5K
C4
option
C1
1uF
VOUT
VOUT
VOUT
FB
1
2
3
4
5
10 CNTL
NC
C3
100uF
9
8
7
6
VIN
VIN
VIN
EN
R1
10K
C2
22uF
9
GND
GND
POK
WDFN3x3-10L
uP8801S-DS-F0000, Dec. 2014
www.upi-semi.com
1