LR1121BL-23-AF5-A-R [UTC]
HIGH RIPPLE-REJECTION LDO REGULATOR;型号: | LR1121BL-23-AF5-A-R |
厂家: | Unisonic Technologies |
描述: | HIGH RIPPLE-REJECTION LDO REGULATOR |
文件: | 总6页 (文件大小:244K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LR1121B
CMOS IC
HIGH RIPPLE-REJECTION LDO
REGULATOR
DESCRIPTION
The UTC LR1121B is CMOS-based voltage regulator ICs with
high output voltage accuracy, extremely low current, low
ON-resistance, and high Ripple Rejection.
An ON/OFF circuit enables the output to be turned off, ensuring a
long battery life. a built-in low on-resistance transistor provides a low
dropout voltage and large output current, and a built-in overcurrent
protector prevents the load current from exceeding the current
capacitance of the output transistor.
The line transient response and load transient of the UTC
LR1121B is excellent.
FEATURES
* Ultra-Low Supply Current :
During Operation: 30μA TYP.
During Standby: 0.1μA Typ.
* Output Voltage: 2.1V ~ 5.5V, Selectable in 0.1 V Steps.
* High Output Voltage Accuracy: ±2.0%
* Low Dropout Voltage: 180 mV Typ. (2.8 V Output Product, IOUT = 100 mA)
* High Ripple Rejection: 70 dB TYP. (@ 1.0 kHz)
* High Peak Current Capability: 150 mA Output is Possible (@ VIN ≥ VOUT(S) + 1.0 V)
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
LR1121BL-xx-AF5-A-R
LR1121BL-xx-AF5-B-R
LR1121BG-xx-AF5-A-R
LR1121BG-xx-AF5-B-R
SOT-25
SOT-25
Tape Reel
Tape Reel
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Copyright © 2018 Unisonic Technologies Co., Ltd
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LR1121B
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
4
21:2.1V 30:3.0V 40:4.0V 50:5.0V
22:2.2V 31:3.1V 41:4.1V 51:5.1V
23:2.3V 32:3.2V 42:4.2V 52:5.2V
24:2.4V 33:3.3V 43:4.3V 53:5.3V
25:2.5V 34:3.4V 44:4.4V 54:5.4V
26:2.6V 35:3.5V 45:4.5V 55:5.5V
27:2.7V 36:3.6V 46:4.6V
5
Voltage Code
K
SOT-25
L: Lead Free
G: Halogen Free
Pin Code
28:2.8V 37:3.7V 47:4.7V
1
2
3
2J:2.85V 38:3.8V 48:4.8V
29:2.9V 39:3.9V 49:4.9V
PIN DESCRIPTION
PIN NO.
SYMBOL
DESCRIPTION
A
5
2
1
3
4
B
1
2
3
4
5
VOUT
VSS
Output pin
GND pin
VIN
Input pin
ON/OFF
NC*
Chip enable pin
No connection (The NC pin is electrically open or connected to VIN or VSS.)
BLOCK DIAGRAM
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LR1121B
CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25°C)
PARAMETER
SYMBOL
VIN
RATINGS
7
UNIT
V
Input Voltage
VON/OFF
VOUT
PD
0.3 ~ VIN+0.3
-0.3 ~ VIN+0.3
280
V
Output Voltage
V
Power Dissipation
mW
°C
°C
°C
Junction Temperature
Operating Temperature
Storage Temperature
TJ
125
TOPR
TSTG
-40 ~ +85
-40 ~ +125
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.
ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified.)
TEST
CIRCUIT
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
TYP MAX UNIT
VOUT
×0.98
200
VOUT
×1.02
Output Voltage
1
3
VIN=VOUT+1.0V, IOUT=30mA
V
Output Current
Input Voltage
IOUT
VIN
VIN≧VOUT+1.0V
mA
2.0
7
V
△VOUT(LINE)
△VIN×VOUT
V
OUT+0.5V≤VIN≤7V
Line Regulation
Load Regulation
Supply Current
1
1
2
2
3
0.04
15
0.2
%/V
I
OUT=30mA
VIN=VOUT+1.0V
1.0mA≤IOUT≤80mA
△VOUT(LOAD)
ISS1
40
65
mV
VIN=VOUT+1.0V, ON/OFF
pin=ON, no load
30
μA
Supply Current During
standby
VIN=VOUT+1.0V, ON/OFF
pin=OFF, no load
ISS2
0.1
230
1.0
VIN=VOUT+1.0V, ON/OFF
pin=ON, VOUT=0V
Short Circuit Current
ISHORT
mA
V
Shutdown Pin Input
Voltage
High
Low
High
Low
VSH
VSL
ISH
4
4
4
4
VIN=VOUT+1.0V, RL=10KΩ
VIN=VOUT+1.0V, RL=10KΩ
VIN=7V, VON/OFF= VIN
VIN=7V, VON/OFF= VSS
VIN=VOUT+1.0V, f=1.0kHz
Ripple 0.5Vp-p
1.6
0
VIN
0.3
0.1
0.1
Shutdown Pin Input
Current
-0.1
-0.1
μA
ISL
Ripple Rejection
RR
5
70
dB
ELECTRICAL CHARACTERISTICS OF DROPOUT VOLTAGE (TA=25°C)
VD (Dropout Voltage)
Output Voltage, VOUT (V)
Condition
MIN
TYP
0.22
0.20
0.18
0.15
MAX
0.70
0.35
0.30
0.26
UNIT
2.1V≤VOUT(S)≤2.4V
2.5V≤VOUT(S)≤2.7V
2.8V≤VOUT(S)≤3.3V
3.4V≤VOUT(S)≤5.5V
V
V
V
V
I
OUT=100mA
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LR1121B
CMOS IC
TEST CIRCUIT
Note:
Input capacitor (CIN): 1.0 μF or more
Output capacitor (CL): 2.2μF or more (tantalum capacitor)
SELECTION OF OUTPUT CAPACITOR (CL)
In this IC, phase compensation and the output capacitor is made for securing stable operation even if the load
current is varied. Therefore, always place a capacitor (CL) of 2.2 μF or more between VOUT and VSS pins. Using a
capacitor whose ESR is outside the optimum range (approximately 0.5 ~ 5Ω), whether larger or smaller, may cause
an unstable output, resulting in oscillation. For this reason, a tantalum electrolytic capacitor is recommended.
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LR1121B
CMOS IC
TYPICAL APPLICATION CIRCUIT
Note:
Input capacitor (CIN): 1.0 μF or more
Output capacitor (CL): 2.2μF or more (tantalum capacitor)
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LR1121B
CMOS IC
TYPICAL CHARACTERISTICS
Dropout voltage vs. Output current
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all UTC products described or contained herein.
UTC products are not designed for use in life support appliances, devices or systems where malfunction
of these products can be reasonably expected to result in personal injury. Reproduction in whole or in
part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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