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PDF LR1812 Data sheet ( Hoja de datos )
| Número de pieza | LR1812 | |
| Descripción | 1.0A FAST ULTRA LOW DROPOUT LINEAR REGULATOR | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
LR1812
1.0A FAST ULTRA LOW
DROPOUT LINEAR
REGULATOR WITH REVERSE
CURRENT PROTECTION
DESCRIPTION
The UTC LR1812 operate from a +1.5V ~ +6V input supply as
fast ultra low-dropout linear regulators. Wide output voltage range
options are available. The fast response characteristic to make
UTC LR1812 suitable for low voltage microprocessor application.
The low quiescent current operation and low dropout quality
caused by the CMOS process.
The UTC LR1812 has low dropout voltage. The ground pin
current is typically 60uA.
Output Voltage Precision: Multiple output voltage options are
available and ranging from 1.2V ~ 5.0V at room temperature with a
guaranteed accuracy of ±1.5%, and ±3.0% when varying line and
load.
With the reverse current protection function of a driver
transistor, the reverse current flow is prohibited when VOUT
voltage is higher than VIN voltage. For an example, when a battery
is connected to the VOUT pin, battery current will not flow back to
the UTC LR1812
The output voltage types of UTC LR1812-xx are fixed one in
the IC.
FEATURES
* Low Dropout Voltage
* The Guaranteed Output Current is 1A DC
* Output Voltage Accuracy ± 1.5%
* Over temperature Protection And Over current Protection
* Reverse Current Protection
ORDERING INFORMATION
Note:
Ordering Number
LR1812G-xx-AF5-R
LR1812G-xx-SH2-R
xx: Output Voltage, refer to Marking Information.
Package
SOT-25
HSOP-8
CMOS IC
Packing
Tape Ree
Tape Reel
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
1 of 6
QW-R102-079.a
1 page  
LR1812
CMOS IC
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
ON/OFF Pin Input Voltage “H”
ON/OFF Pin Input Voltage “L”
VSH VIN=VOUT(S)+1V, RL=1.0KΩ
VSL Determinied by VOUT output level
1.5
0.3 V
ON/OFF Pin Input Current “H”
ON/OFF Pin Input Current “L”
ISH VIN=VOUT(S)+1V,VON/OFF=5.5V
ISL VIN=VOUT(S)+1V,VON/OFF=0V
-0.1
-0.1
0.1 uA
0.1 uA
Reverse Current(Note 8)
IREV VIN=0V, VOUT= 6.0V
0.1 1.5 uA
VOUT Pin Sink Current
(Note 9)
IREVS
VIN=5.0V, VOUT=6.0V
0.1 1.5 uA
Ripple Rejection
|RR|
VIN=VOUT(S)+1V,
f=1khz,
△Vrip=0.5Vrms,
IOUT=100mA
1.2V≤VOUT(S)<3.0V
3.0V≤VOUT(S) ≤3.5V
3.5V≤VOUT(S) ≤5.0V
65
60
55
dB
Thermal Shutdown detection
temperature
TSD Junction temperature
150 °C
Thermal Shutdown release
temperature
TSR Junction temperature
120 °C
Notes: 1. The UTC LR1812 output must be diode-clamped to ground. If used in a dual-supply system where the
regulator load is returned to a negative supply.
2. Devices must be derated based on package thermal resistance at elevated temperatures.
3. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT(=100ma) and inputting VOUT(S)+1.0V
4. Vdrop=VIN1-(VOUT3×0.98)
VOUT3 is the output voltage when VIN=VOUT(S)+1.0V and IOUT=300mA, 1000mA.
5. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the
output current.
6. The change in temperature [mV/°C] is calculated using the following equation.
VOUT
TA
mV
/ C
VOUT
(S )
V
VOUT
TA VOUT
ppm / C 1000
7. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be
paid to the power dissipation of the package when the output current is large.
This specification is guaranteed by design.
8. Reverse current (IREV) flows from VOUT to VIN.
9. VOUT pin sink current (IREVS) flows from VOUT to GND.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R102-079.a
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LR1812.PDF ] | |
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