LR8845G-XX-AA3-D-R [UTC]
3A LOW DROPOUT LINEAR REGULATOR; 3A低压降线性稳压器型号: | LR8845G-XX-AA3-D-R |
厂家: | Unisonic Technologies |
描述: | 3A LOW DROPOUT LINEAR REGULATOR |
文件: | 总4页 (文件大小:274K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LR8845
Preliminary
CMOS IC
3A LOW DROPOUT LINEAR
REGULATOR
DESCRIPTION
The UTC LR8845 belonged to low quiescent current, low
dropout linear regulators operated from 2.5V to 6V input and are
guaranteed to deliver 3A. Wide range of preset output voltage
options are available. Built-in low on-resistance transistor provides
low dropout voltage and large output current. The UTC LR8845 is
designed and optimized for battery-powered systems to work with
low noise.
The UTC LR8845 consumes less than 2μA in shutdown mode.
Other features include ultra low dropout voltage, current limiting
protection, thermal shutdown protection and high ripple rejection
ratio.
FEATURES
* 3A Guaranteed Output Current
* low quiescent current: 300μA (typ.)
* 2μA Shutdown Current
* Short Circuit Current Fold-back
* Low Temperature Coefficient
* Current Limiting Protection
* Thermal Shutdown Protection
* Excellent Line/Load Transient
* SENSE Option Improves Load Regulation
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Packing
Lead Free
Halogen Free
1
2
3
LR8845L-xx-AA3-D-R
LR8845L-xx-TN3-D-R
LR8845L-xx-TN3-D-T
LR8845L-xx-TQ3-D-R
LR8845L-xx-TQ3-D-T
LR8845G-xx-AA3-D-R
LR8845G-xx-TN3-D-R
LR8845G-xx-TN3-D-T
LR8845G-xx-TQ3-D-R
LR8845G-xx-TQ3-D-T
SOT-223
TO-252
TO-252
TO-263
TO-263
I
I
I
I
I
G
G
G
G
G
O
O
O
O
O
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
Note: 1. Pin assignment: I: VIN O: VOUT G: GND
2. xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
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Copyright © 2012 Unisonic Technologies Co., Ltd
QW-R502-750.a
LR8845
Preliminary
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
G: Halogen Free
L: Lead Free
LR8845
Pin Code
SOT-223
Voltage Code
Date Code
1
2
3
25:2.5V
TO-252
TO-263
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
2 of 4
QW-R502-750.a
www.unisonic.com.tw
LR8845
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°С)
PARAMETER SYMBOL
RATINGS
7
UNIT
V
Supply Voltage
VIN
PD
Power Dissipation
Internally limited
+150
mW
°С
Junction Temperature
Operation Temperature
Storage Temperature
TJ
TOPR
TSTG
-40 ~ +85
-65 ~ +150
°С
°С
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
165
UNIT
TO-223
TO-252
TO-263
Junction to Ambient
θJA
108
°С/W
64
ELECTRICAL CHARACTERISTICS
(VIN = VOUT + 1V whichever is greater, CIN =0.1µF, COUT =2.2µF (Ceramic), TA= 25°C, unless otherwise specified)
PARAMETER
Input Voltage
SYMBOL
VIN
TEST CONDITIONS
MIN
Note1
-2
TYP
MAX
UNIT
V
6
2
3
TA=25°С , IOUT= 1mA ~3A
TA=0~85°С, IOUT= 1mA~3A
Output Voltage Accuracy
VOUT
%
-3
Maximum Output Current
Short-Circuit Current Limit
Short-Circuit Current
IOUT
ILIMIT
ISC
3
A
A
A
VOUT>1.2V
4.5
1.7
300
300
VOUT<0.4V
IOUT = 0mA
400
Ground Pin Current
IGND
µA
IOUT= 1mA to 3A
1.5V<=VOUT<=1.8V
IOUT=3A 1.8V<VOUT<2.5V
2.5<=VOUT
1000
700
Dropout Voltage (Note 2)
Line Regulation
VD
mV
300
0.1
450
ΔV
OUT
ΔV × V
IN OUT
VIN=VOUT+VD~6V
0.2
1
%/V
Load Regulation
ΔVOUT
eN
VIN=VOUT+1V, IOUT=10mA~3A
0.2
30
%
Output Voltage Noise
f=10Hz to100kHz, COUT=2.2μF
µVRMS
SHDN
=GND
Shutdown Supply Current
IOFF
2
10
µA
f=100Hz
f=1kHz
70
60
I
C
OUT=100mA
OUT=10μF
Power Supply Rejection
PSRR
dB
VIH
VIL
2
Shutdown Threshold
V
0.4
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Notes: 1. VIN(MIN)= VOUT+ VDROPOUT
TSHDN
DTSHDN
150
20
°С
2. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) × 98%
UNISONIC TECHNOLOGIES CO., LTD
3 of 4
QW-R502-750.a
www.unisonic.com.tw
LR8845
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
4 of 4
QW-R502-750.a
www.unisonic.com.tw
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