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UNISONIC TECHNOLOGIES CO., LTD
L1806
Preliminary CMOS IC
1 of 7
Copyright © 2022 Unisonic Technologies Co., Ltd
QW-R102-063.d
3A, ULTRA LOW DROPOUT
(0.23V@3A) LINEAR
REGULATOR
DESCRIPTION
The UTC L1806 is a typical LDO with the features of very low
dropout voltage as low as 0.23V at output current 3A.
For normal operation, two supply voltages are necessary. One
called control voltage from other equipment can shutdown the
output voltage and it should pull and hold the voltage of EN pin less
than 0.5V. Another one is the main supply voltage whose purpose is
for main power conversion, to keep the power dissipation low, and
to make the dropout voltage lower.
Internally, in the UTC L1806, there’re many functions which
can be seen in the block figure to prevent the IC from being
damaged. Internal Power-On-Reset (POR) circuit can control the
two supply voltages to prevent fault operations of the circuit; the
thermal shutdown circuit is able to protect the device from over
thermal operation, and a current limit function will keep the device
work safely under current over-loads.
The UTC L1806 can be used as an ideal to provide well supply
voltage in the applications, such as front-side-bus termination on
motherboard, NB applications, front side bus V
TT
(1.2V/3A) and
note book PC applications.
FEATURES
* Low Dropout V
D
=0.23V(typ.)@ I
OUT
=3A
* Low ESR Output Capacitor
* V
REF
=0.8V
* Fast Transient Response
* Output Voltage Adjustable through External Resistors
* POR(Power-On-Reset) controlling V
CNTL
and V
IN
* With internal Soft-Start
* Internal Current Limit Protection
* Internal Under Voltage Protection
* Hysteretic Thermal Shutdown
* With Power-OK Output (with a Delay Time)
* Low Shutdown Quiescent Current (<30 uA)
* Shutdown/Enable Control Function
ORDERING INFORMATION
Ordering Number
Package Packing
Lead Free Halogen Free
L1806L-SH2-R L1806G-SH2-R HSOP-8 Tape Reel
L1806L-K10-3030-R L1806G-K10-3030-R DFN3030-10 Tape Reel
L1806G-SH2-R
(1)Packing Type
(2)Package Type
(1) R: Tape Reel
(2) SH2: HSOP-8, K10-3030: DFN3030-10
(3) G: Halogen Free and Lead Free, L: Lead Free
(3)Green Package