UTC LR1120G-18-AF5-A-R, LR1120G-18-AL5-A-R, LR1120G-25-AF5-A-R, LR1120G-25-AL5-A-R, LR1120G-28-AF5-A-R Schematic [ru]
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UNISONIC TECHNOLOGIES CO., LTD
LR1120 Preliminary CMOS IC
500mA, LOW DROPOUT, LOW NOISE ULTRA-FAST WITH SOFT START CMOS LDO REGULATOR
DESCRIPTION
UTC LR1120, a 500mA LDO regulator, has very high PSRR and super low dropout voltage especially suitable for wireless and portable applications.
In the field of hand-held wireless devices, board space and battery life are the main concerns of designers and end-users. Because of the low quiescent current and low ESR ceramic capacitors, UTC LR1120 can satisfy those concerns.
Furthermore, low current consumption in shutdown mode (0.7μA), fast turn-on time (<70μs), high output accuracy, current limiting protection, and high ripple rejection ratio are advantages of UTC LR1120.
FEATURES
*Operating Voltage Ranges : 2.2V to 5.5V
*Dropout : 250mV at 500mA
*When IC Shutdown: 5mA Discharge Current of VOUT
*Extreme Low Noise for DSC Application
*Extreme Fast Response in Line/Load Transient
*Internal Current Limiting Protection
*Internal Thermal Shutdown Protection
*High PSRR
*Recommended 1μF Output Capacitor only for Stability
*With TTL Logic Controlled Shutdown Input
ORDERING INFORMATION
Ordering Number |
Package |
Packing |
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Lead Free |
Halogen Free |
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LR1120L-xx-AF5-x-R |
LR1120G-xx-AF5-x-R |
SOT-25 |
Tape Reel |
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LR1120L-xx-AL5-x-R |
LR1120G-xx-AL5-x-R |
SOT-353 |
Tape Reel |
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Note: xx: Output Voltage, refer to Marking Information.
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www.unisonic.com.tw |
1 of 5 |
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Copyright © 2013 Unisonic Technologies Co., Ltd |
QW-R502-331.j |
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LR1120 |
Preliminary |
CMOS IC |
MARKING INFORMATION
PACKAGE |
VOLTAGE CODE |
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MARKING |
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18 :1.8V |
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25 :2.5V |
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SOT-25 |
28 :2.8V |
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30: 3.0V |
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SOT-353 |
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31 :3.1V |
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33 :3.3V |
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40:4.0V
PIN DESCRIPTION
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PIN CODE |
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PIN |
DESCRIPTION |
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A |
B |
C |
D |
NAME |
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1 |
1 |
1 |
2 |
VIN |
Supply voltage input. |
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2 |
2 |
2 |
1 |
GND |
Ground. |
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3 |
3 |
3 |
- |
EN |
Input logic pin, active high for enabling the chip. When this pin goes to |
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a logic low, the chip will be shutdown. |
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4 |
- |
- |
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SS |
Soft start pin. |
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5 |
4 |
5 |
3 |
VOUT |
Regulator output voltage pin. |
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- |
5 |
4 |
4, 5 |
NC |
No Connection |
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BLOCK DIAGRAM
SS |
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Current Limit |
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VIN |
VREF |
- |
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POR |
+ |
MOS Driver |
OTP |
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VOUT |
EN |
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R |
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GND |
UNISONICTECHNOLOGIESCO.,LTD |
2 of 5 |
www.unisonic.com.tw |
QW-R502-331.j |
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