Voltage Regulator. LMS5258 Datasheet

LMS5258 Regulator. Datasheet pdf. Equivalent

LMS5258 Datasheet
Recommendation LMS5258 Datasheet
Part LMS5258
Description 150mA / Cap / Low Dropout Voltage Regulator
Feature LMS5258; LMS5258 150mA, µCap, Low Dropout Voltage Regulator with Power Good February 2003 LMS5258 150mA, µC.
Manufacture National Semiconductor
Datasheet
Download LMS5258 Datasheet




National Semiconductor LMS5258
February 2003
LMS5258
150mA, µCap, Low Dropout Voltage Regulator with
Power Good
General Description
The LMS5258 is a µCap, precise CMOS voltage regulator
with power good output.
It provides up to 150mA and consumes a typical of 10nA in
shutdown mode. The LMS5258 output stage is designed
with a push pull output for faster transient response.
The LMS5258 is optimized to work with low value, low cost
ceramic capacitors. The output typically require only 1µF of
output capacitance for stability. The enable pin can be tied to
VIN for easy device layout.
The LMS5258 is designed for portable, battery powered
equipment applications with small space requirements.
The LMS5258 is available in a 5-pin SOT-23 package. Per-
formance is specified for the −40˚C to +125˚C temperature
range and is available in a fixed 1.2V. For other output
voltage options, please contact National Semiconductor.
Features
n Power good indicator
n Stability with low ESR capacitors
n Low ground current: 120µA
n 150mA output current
n "Zero" shutdown mode current
n Fast transient response
n Auto Discharge
n Thermal shutdown
n Current limiting
n TTL-Logic-controlled enable input
n Pin-to-pin replacement for Mic5258
Applications
n Processor power-up sequencing
n Laptop, notebook and palm top computer
n PCMCIA VCC and VPP regulation switching
Typical Application
Pin Description
Pin Number
1
2
3
Pin Name
VIN
GND
EN
4 PG
5 VOUT
© 2003 National Semiconductor Corporation DS200424
20042419
Pin Function
Input Voltage
Ground
Enable Input Logic,
Logic High = Enabled
Logic Low = Shutdown
(Do not leave open)
Power Good Output
Output Voltage
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National Semiconductor LMS5258
Connection Diagram
SOT23-5
Ordering Information
Package
Part Number
5-Pin SOT-23
LMS5258MF-1.2
LMS5258MFX-1.2
Top View
20042421
Package Marking
LF9B
Transport Media
1k Units Tape and Reel
3k Units Tape and Reel
NSC
Drawing
MF05A
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National Semiconductor LMS5258
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance (Note 2)
Human Body Model
Junction Temperature
VIN, VOUT, VEN
Soldering Information
Infrared or Convection (20 sec)
Wave Soldering (10 sec)
2000V
150˚C
−0.3 TO 6.5V
235˚C
260˚C (lead temp)
Operating Ratings
Supply Voltages
VIN
VEN
Junction Temp. Range (Note 3)
Storage Temperature Range
Package Themal Resistance
SOT23-5
2.7V to 6V
0V to VIN
−40˚C to +125˚C
−65˚C to 150˚C
235˚C/W
Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, VIN = 2.7V, IL = 100µA, COUT = 1µF, VEN 2.0V. Boldface
limits apply over the entire operating temperature range, −40˚C to 125˚C.
Symbol
Parameter
Conditions
Min Typ Max
(Note 5) (Note 4) (Note 5)
Units
VO Output Voltage Accuracy
-3 3 %
-4 4
VO/VO
Line Regulation
VIN = 2.7V to 6V
−0.3
0.3 %
VO/VO
Load Regulation
IL = 0.1mA to 150mA (Note 6)
1 4%
IQ Quiescent Current
VEN 0.4V (Shutdown), PG = NC
.01 1 µA
IGND
Ground Pin Current (Note 5) VEN 2.0V (active),
120 180
µA
VIN = 6V, IL = 0mA
IL = 150mA, VEN 2.0V (active),
160 225
VIN = 6V
PSRR
Power Supply Rejection
f = 120HZ, COUT = 4.7µF,
62 dB
IL= 150mA
ILIMIT
Current Limit
VOUT = 0V
160 350
mA
Thermal Protection
Thermal Shutdown
Temperature
150 ˚C
Enable Input
VIL Enable Input Voltage Level
VIH
IIL Enable Input Current
IIH
Power Good
Logic Low (off), VIN = 5.5V
Logic High (on), VIN = 5.5V
VIL 0.4V, VIN = 5.5V
VIH 2.0V, VIN = 5.5V
0.4 V
2V
0.01
µA
0.01
µA
VPG Low Threshold
% of VOUT (PG ON)
High Threshold
% of VOUT (PG OFF)
VOL
PG Output Logic-Low
Ipowergood = 100µA, Fault
Voltage
Condition
89
97
0.02
0.1
%
V
IPG
Power Good Leakage
Power Good Off, VPG = 5.5V
Current
0.01
µA
VPG Delay Delay Time to Power Good See Timing Diagram
1
5 ms
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5kin series with 100pF.
Note 3: The maximum power dissipation is a function of TJ(MAX) , θJA, and TA. The maximum allowable power dissipation at any ambient temperature
is PD = (TJ(MAX)–T A)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 4: Typical Values represent the most likely parametric norm.
Note 5: All limits are guaranteed by testing or statistical analysis.
Note 6: Regulation is measured at constant junction temperature using low duty cycle pulse testing.
Note 7: Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current.
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