UNISONIC TECHNOLOGIES CO., LTD
LP5951
Preliminary
LINEAR INTEGRATED CIRCUIT
HIGH INPUT VOLTAGE, LOW
QUIESCENT CURRENT,
150mA LDO REGULATOR
DESCRIPTION
The
UTC LP5951
is a low ground current linear regulator which
operates with input voltage from 6.5V ~ 25V and delivers output
current up to 150mA. Typical dropout voltage is only 450mV at
150mA loading.
The
UTC LP5951
has many protection functions including over
temperature and current limit which prevent the device from
thermal over-load and current over-load.
HSOP-8
FEATURES
* Wide Operating Voltage : 6.5V~25V
* Ultra Low Ground Current :120μA
* High Output Accuracy : ±2% over temperature
* Excellent Load/Line Transient
* Low Dropout Voltage : 450mv @ 150mA
* Built-in Current Limit Protection
* Built-in Over Temperature Protection
* Zero Shutdown Current
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LP5951L-xx-SH2-R
LP5951G-xx-SH2-R
LP5951L-xx-SH2-T
LP5951G-xx-SH2-T
Note: xx: Output Voltage, refer to Marking Information.
LP5951L-xx-SH2-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Lead Free
Package
HSOP-8
HSOP-8
Packing
Tape Reel
Tube
(1) R: Tape Reel, T: Tube
(2) SH2: HSOP-8
(3) xx: Refer to Marking Information
(4) G: Halogen Free, L: Lead Free
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LP5951
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
Preliminary
LINEAR INTEGRATED CIRCUIT
MARKING
Date Code
HSOP-8
AD :ADJ
UTC
LP5951
XX
G: Halogen Free
L: Lead Free
Lot Code
Voltage Code
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
1
2, 3, 6
4
5
7
8
PIN NAME
V
OUT
NC
ADJ
EN
GND
V
IN
DESCRIPTION
output pin
No Connection
ADJ: output feedback pin
ON/OFF pin, low=output ON; high=output OFF
Ground
Input pin
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QW-R102-047.a
LP5951
BLOCK DIAGRAM
Preliminary
LINEAR INTEGRATED CIRCUIT
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QW-R102-047.a
LP5951
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
-0.3~+27
V
Feedback Voltage
V
FB
-1.5~+27
V
Shutdown Voltage
V
SHDN
-0.3~+27
V
Power Dissipation
P
D
Internally Limited
W
Junction Temperature
T
J
+125
°C
Storage Temperature
T
STG
-65~+150
°C
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
Junction to Ambient
Junction to Case
SYMBOL
θ
JA
θ
JC
RATINGS
50
20
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over V
IN
=V
OUT
+2.5V, C
IN
=1µF, C
OUT
=2.2mF,T
A
=-40°C ~ 85°C.
Typical values refer to T
A
=25°C.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Input Voltage
V
IN
6.5
25
V
Output Voltage Accuracy
V
OUT
-2
2
%
Output Voltage Range
3
20
V
I
OUT
=0.1mA
75
120
140
μA
Quiescent Current
I
Q
8
12
22
mA
I
OUT
=150mA
Load Current Range
I
OUT
0
150
mA
Reference Voltage
V
REF
-2% 1.235 +2%
V
Line Regulation
ΔV
OUT
V
OUT
+2.5V<V
IN
<25V, I
OUT
=1mA
0.1
0.2
%
Load Regulation
ΔV
OUT
0.1mA<I
OUT
<150mA
0.2
0.5
%
I
OUT
=0.1mA
50
80
150
mV
Dropout Voltage
V
D
380
450
600
I
OU
T=150mA
PROTECTION
Over Temperature Shutdown
OTS
150
°C
Circuit Current Limit
I
LIMIT
V
IN
=V
OUT
+2.5V
250
350
500
mA
Short Current
I
SHORT
V
OUT
=0V
50
mA
SHUTDOWN
Input High Voltage
2
V
EN
V
Input Low Voltage
0.7
EN pin Input Bias Current
I
EN
V
EN
=25V
450
600
μA
Shutdown Supply Current
I
QSHDN
EN=High, V
IN
=19V
0.1
1
mA
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QW-R102-047.a
LP5951
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
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. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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嵌入式系统
