Voltage Regulator. LMS5258 Datasheet
150mA, µCap, Low Dropout Voltage Regulator with
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.
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 Mic™ 5258
n Processor power-up sequencing
n Laptop, notebook and palm top computer
n PCMCIA VCC and VPP regulation switching
© 2003 National Semiconductor Corporation DS200424
Enable Input Logic,
Logic High = Enabled
Logic Low = Shutdown
(Do not leave open)
Power Good Output
1k Units Tape and Reel
3k Units Tape and Reel
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
VIN, VOUT, VEN
Infrared or Convection (20 sec)
Wave Soldering (10 sec)
−0.3 TO 6.5V
260˚C (lead temp)
Junction Temp. Range (Note 3)
Storage Temperature Range
Package Themal Resistance
2.7V to 6V
0V to VIN
−40˚C to +125˚C
−65˚C to 150˚C
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.
Min Typ Max
(Note 5) (Note 4) (Note 5)
VO Output Voltage Accuracy
-3 3 %
VIN = 2.7V to 6V
IL = 0.1mA to 150mA (Note 6)
IQ Quiescent Current
VEN ≤ 0.4V (Shutdown), PG = NC
.01 1 µA
Ground Pin Current (Note 5) VEN ≥ 2.0V (active),
VIN = 6V, IL = 0mA
IL = 150mA, VEN ≥ 2.0V (active),
VIN = 6V
Power Supply Rejection
f = 120HZ, COUT = 4.7µF,
VOUT = 0V
VIL Enable Input Voltage Level
IIL Enable Input Current
Logic Low (off), VIN = 5.5V
Logic High (on), VIN = 5.5V
VIL ≤ 0.4V, VIN = 5.5V
VIH ≥ 2.0V, VIN = 5.5V
VPG Low Threshold
% of VOUT (PG ON)
% of VOUT (PG OFF)
PG Output Logic-Low
Ipowergood = 100µA, Fault
Power Good Leakage
Power Good Off, VPG = 5.5V
VPG Delay Delay Time to Power Good See Timing Diagram
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, 1.5kΩ in 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.