NSC LP5951MFX-3.3, LP5951 Datasheet
May 2007
LP5951
Micropower, 150mA Low-Dropout CMOS Voltage
Regulator
General Description
The LP5951 regulator is designed to meet the requirements
of portable, battery-powered systems providing a regulated
output voltage and low quiescent current. When switched to
shutdown mode via a logic signal at the Enable pin, the power
consumption is reduced to virtually zero.
The LP5951 is designed to be stable with small 1µF ceramic
capacitors.
The LP5951 also features internal protection against shortcircuit currents and over-temperature conditions.
Performance is specified for a -40°C to 125°C temperature
range.
The device is available in SOT23-5 and SC70-5 package.
The device is available in fixed output voltages in the range
of 1.3V to 3.3V. For availability, please contact your local NSC
sales office.
Features
■
Excellent line transient response: ±2mV typ.
■
Excellent PSRR: -60dB at 1kHz typ.
■
Low quiescent current of 29µA typ.
■
1.8 to 5.5V input voltage range
■
Small SC70-5 and SOT23-5 packages
■
Fast turn-on time of 30µs typ.
■
Typ. < 1nA quiescent current in shutdown
■
Guaranteed 150mA output current
■
Output voltage range: 1.3V to 3.3V
■
Logic controlled enable 0.4V/0.9V
■
Good load transient response of 50mVpp typ.
■
Thermal-overload and short-circuit protection
■
-40°C to +125°C junction temperature range
Applications
■
General purpose
Typical Application Circuit
20136201
© 2007 National Semiconductor Corporation 201362 www.national.com
LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator
Connection Diagrams
5-Lead Small Outline Package
SOT23-5 (MF)
20136202
Top View
See NS Package Number MF05A
5-Lead Small Outline Package
SC70-5 (MG)
20136203
Top View
See NS Package Number MAA05A
Pin Descriptions
Pin Number Pin Name Description
1 V
IN
Input Voltage. Input range: 1.8V to 5.5V
2 GND Ground
3 EN Enable pin logic input: Low = shutdown, High = normal operation. This pin should not be left floating.
4 NC No internal connection
5 V
OUT
Regulated output voltage
Order Information
For 5-Lead Small Outline Package SOT23-5 (MF)
Output Voltage
(V)
LP5951 Supplied as 1000 Units,
Tape and Reel
LP5951 Supplied as 3000 Units,
Tape and Reel
Flow Package
Marking
1.3
LP5951MF-1.3 LP5951MFX-1.3 LKRB
LP5951MF-1.3 LP5951MFX-1.3 NOPB LKRB
1.5
LP5951MF-1.5 LP5951MFX-1.5 LKAB
LP5951MF-1.5 LP5951MFX-1.5 NOPB LKAB
1.8
LP5951MF-1.8 LP5951MFX-1.8 LKBB
LP5951MF-1.8 LP5951MFX-1.8 NOPB LKBB
2.0
LP5951MF-2.0 LP5951MFX-2.0 LKCB
LP5951MF-2.0 LP5951MFX-2.0 NOPB LKCB
2.5
LP5951MF-2.5 LP5951MFX-2.5 LKEB
LP5951MF-2.5 LP5951MFX-2.5 NOPB LKEB
2.8
LP5951MF-2.8 LP5951MFX-2.8 LKFB
LP5951MF-2.8 LP5951MFX-2.8 NOPB LKFB
3.0
LP5951MF-3.0 LP5951MFX-3.0 LKGB
LP5951MF-3.0 LP5951MFX-3.0 NOPB LKGB
3.3
LP5951MF-3.3 LP5951MFX-3.3 LKHB
LP5951MF-3.3 LP5951MFX-3.3 NOPB LKHB
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LP5951
For 5-Lead Small Outline Package SC70-5 (MG)
Output Voltage
(V)
LP5951 Supplied as 1000 Units,
Tape and Reel
LP5951 Supplied as 3000 Units,
Tape and Reel
Flow Package
Marking
1.3
LP5951MG-1.3 LP5951MGX-1.3 L23
LP5951MG-1.3 LP5951MGX-1.3 NOPB L23
1.5
LP5951MG-1.5 LP5951MGX-1.5 L2B
LP5951MG-1.5 LP5951MGX-1.5 NOPB L2B
1.8
LP5951MG-1.8 LP5951MGX-1.8 L3B
LP5951MG-1.8 LP5951MGX-1.8 NOPB L3B
2.0
LP5951MG-2.0 LP5951MGX-2.0 L4B
LP5951MG-2.0 LP5951MGX-2.0 NOPB L4B
2.5
LP5951MG-2.5 LP5951MGX-2.5 L5B
LP5951MG-2.5 LP5951MGX-2.5 NOPB L5B
2.8
LP5951MG-2.8 LP5951MGX-2.8 L6B
LP5951MG-2.8 LP5951MGX-2.8 NOPB L6B
3.0
LP5951MG-3.0 LP5951MGX-3.0 L7B
LP5951MG-3.0 LP5951MGX-3.0 NOPB L7B
3.3
LP5951MG-3.3 LP5951MGX-3.3 LAB
LP5951MG-3.3 LP5951MGX-3.3 NOPB LAB
Note:
The package marking on the backside of the component designates the date code and a NSC internal code for die traceability. It will vary considerably.
SOT23-5: ZWTT
SC70-5: WTT
with: Z: 1 Digit Assembly Plant Code, W: 1 Digit Date Code, TT: 2 Digit Dierun Code
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LP5951
Absolute Maximum Ratings (Notes 2, 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN pin: Voltage to GND -0.3V to 6.5V
EN pin: Voltage to GND -0.3V to (VIN+0.3V)
with 6.5V max
Continuous Power Dissipation
(Note 3) Internally Limited
Junction Temperature (T
J-MAX
) 150°C
Storage Temperature Range -65°C to + 150°C
Package Peak Reflow Temperature
(10-20 sec.) 240°C
Package Peak Reflow Temperature
(Pb-free, 10-20 sec.) 260°C
ESD Rating(Note 4)
Human Body Model: 2.0kV
Machine Model 200V
Operating Ratings
(Notes 1, 2)
Input Voltage Range (VIN) 1.8V to 5.5V
VEN Input Voltage 0 to (VIN + 0.3V)
Junction Temperature (TJ) Range -40°C to + 125°C
Ambient Temperature (TA) Range (Note 5)
Thermal Properties
Junction-to-Ambient Thermal
Resistance (θJA), (Note 6)
SOT23-5 Package: 220°C/W
SC70-5 Package: 415°C/W
ESD Caution Notice
National Semiconductor recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper
ESD handling techniques can result in damage.
Electrical Characteristics (Notes 2, 7)
Typical values and limits appearing in standard typeface are for TA = 25°C. Limits appearing in boldface type apply over the full
operating temperature range: -40°C ≤ TJ ≤ +125°C. Unless otherwise noted, VIN = V
OUT(NOM)
+ 1V, CIN = 1µF, C
OUT
= 1µF, VEN =
0.9V.
Symbol Parameter Condition Typ Limit Units
Min Max
V
IN
Input Voltage
VIN ≥ V
OUT(NOM)
+ V
DO
1.8 5.5 V
ΔV
OUT
Output Voltage
Tolerance
I
OUT
= 1mA
-30°C ≤ TJ ≤ +125°C
-2.0
-3.5
2.0
3.5
%
%
Line Regulation Error VIN = V
OUT(NOM)
+ 1V to 5.5V
I
OUT
= 1mA
0.1 %/V
Load Regulation Error I
OUT
= 1mA to 150mA -0.01 %/mA
V
DO
Output Voltage Dropout
(Note 10)
I
OUT
= 150mA
V
OUT
≥ 2.5V
V
OUT
< 2.5V
200
250
350
mV
mV
I
Q
Quiescent Current VEN = 0.9V, I
LOAD
= 0
VEN = 0.9V, I
LOAD
= 150mA
VEN = 0V
29
33
0.005
55
70
1
µA
µA
µA
I
SC
Output Current
(short circuit)
VIN = V
OUT(NOM)
+ 1V 400 150 mA
PSRR Power Supply
Rejection Ratio
Sine modulated V
IN
f = 100Hz
f = 1kHz
f = 10kHz
60
60
50
dB
dB
dB
E
N
Output Noise BW = 10Hz - 100kHz 125 µV
RMS
TSD Thermal Shutdown 160 °C
Temperature Hysteresis 20 °C
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LP5951
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