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PDF L1806 Data sheet ( Hoja de datos )
| Número de pieza | L1806 | |
| Descripción | ULTRA LOW DROPOUT LINEAR REGULATOR | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
L1806
3A, ULTRA LOW DROPOUT
(0.23V@3A) LINEAR
REGULATOR
CMOS IC
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 VTT (1.2V/3A) and
note book PC applications.
FEATURES
* Low Dropout VD=0.23V(typ.)@ IOUT=3A
* Low ESR Output Capacitor
* VREF=0.8V
* Fast Transient Response
* Output Voltage Adjustable through External Resistors
* POR(Power-On-Reset) controlling VCNTL and VIN
* 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
L1806G-SH2-R
L1806G-K10-3030-R
Package
HSOP-8
DFN-10(3×3)
Packing
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 7
QW-R102-063.b
1 page  
L1806
CMOS IC
ELECTRICAL CHARACTERISTICS
(TA = 25°C, VCNTL = 5V, VIN = 1.5V, VOUT = 1.2V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VCNTL Nominal Supply Current
VCNTL Shutdown Current
ICNTL
ISD
EN = VCNTL
EN = GND
1 1.5 mA
15 30 µA
PG Threshold
VCNTL
VIN
VTHR
VCNTL Rising
VIN Rising
2.5 2.7 2.9 V
0.8 0.9 1.0 V
PG Hysteresis
Reference Voltage
VCNTL
VIN
VHYS
VREF
FB =VOUT
0.4 V
0.5 V
0.8 V
Output Voltage Accuracy
Line Regulation
∆VOUT
∆VIN × VOUT
IOUT=0A~3A, TJ= -25 ~125°С
IOUT=10mA,VCNTL=3~5V
-1.5
-0.15
+1.5 %
+0.15 %/V
Load Regulation
∆VOUT
VOUT
IOUT=0A~3A
0.06 0.25 %
Current Limit
ILIMIT
VCNTL=5V, TJ= 25°С
4 5.7 7 A
Dropout Voltage
Over Temperature Shutdown
VD
OTS
VCNTL=5V
IOUT=3A
TJ Rising
VOUT=2.5V
VOUT=1.8V
VOUT=1.2V
TJ= 25°С
TJ= 25°С
TJ= 25°С
0.26 0.31
0.24 0.29
0.23 0.28
150
V
°С
Over Temperature Hysteresis
OTH
30 °С
Under-Voltage Threshold
VFB Falling
0.4 V
EN Logic High Threshold Voltage
EN Hysteresis
VEN Rising
0.5 0.8 1.1 V
100 mV
EN Pin Pull-Up Current
EN=GND
5 μA
PG Threshold Voltage for Power OK
VPG VFB Rising
90% 92% 94% VREF
PG Threshold Voltage for Power Not OK
PG Low Voltage
VPNOK
VFB Falling
PG sinks 5mA
81%
VREF
0.25 0.4 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 7
QW-R102-063.b
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet L1806.PDF ] | |
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