sm72238tdx-5.0 National Semiconductor Corporation, sm72238tdx-5.0 Datasheet

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sm72238tdx-5.0

Manufacturer Part Number
sm72238tdx-5.0
Description
Solarmagic Micropower Voltage Regulator
Manufacturer
National Semiconductor Corporation
Datasheet
© 2011 National Semiconductor Corporation
SolarMagic Micropower Voltage Regulator
General Description
The SM72238 is a micropower voltage regulator with very low
quiescent current (75μA typ.) and very low dropout voltage
(typ. 40mV at light loads and 380mV at 100mA). It is ideally
suited for use in battery-powered systems. Furthermore, the
quiescent current of the SM72238 increases only slightly in
dropout, prolonging battery life.
The SM72238 is available in the surface-mount D-Pak pack-
age.
Careful design of the SM72238 has minimized all contribu-
tions to the error budget. This includes a tight initial tolerance
(.5% typ.), extremely good load and line regulation (.05% typ.)
and a very low output voltage temperature coefficient, making
the part useful as a low-power voltage reference.
Block Diagram and Typical Applications
301413
SM72238
SM72238
Features
Renewable Energy Grade
High accuracy output voltage
Guaranteed 100mA output current
Extremely low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Use as Regulator or Reference
Needs minimum capacitance for stability
Current and Thermal Limiting
Stable with low-ESR output capacitors (10mΩ to 6Ω)
30141325
www.national.com
May 9, 2011

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sm72238tdx-5.0 Summary of contents

Page 1

... This includes a tight initial tolerance (.5% typ.), extremely good load and line regulation (.05% typ.) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference. Block Diagram and Typical Applications © 2011 National Semiconductor Corporation SM72238 Features ■ Renewable Energy Grade ■ ...

Page 2

... SM72238TDE-3.0 S72238–3.0 SM72238TDX-3.0 SM72238TD-3.3 SM72238TDE-3.3 S72238–3.3 SM72238TDX-3.3 SM72238TD-5.0 SM72238TDE-5.0 S72238 SM72238TDX-5.0 2 30141370 Transport Media NSC Drawing 75 Units in Rail 250 Units in Tape and Reel 2500 Units in Tape and Reel 75 Units in Rail 250 Units in Tape and Reel 2500 Units in Tape and Reel ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Supply Voltage Power Dissipation Junction Temperature ( Ambient Storage Temperature Soldering Dwell Time, Temperature Wave Infrared ...

Page 4

Parameter Conditions = 100μA Dropout Voltage I L (Note 100mA L = 100μA Ground I L Current I = 100mA L Dropout NOM − 0.5 100μA Ground Current I L Current ...

Page 5

Typical Performance Characteristics Quiescent Current Input Current Output Voltage vs. Temperature of 3 Representative Units Dropout Characteristics 30141327 30141329 Quiescent Current 30141331 5 30141328 Input Current 30141330 30141332 www.national.com ...

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Quiescent Current Quiescent Current Dropout Voltage www.national.com Quiescent Current 30141333 Short Circuit Current 30141335 Line Transient Response 30141337 6 30141334 30141336 30141344 ...

Page 7

Load Transient Response 30141345 Output Impedance 30141348 Ripple Rejection 30141350 Load Transient Response Ripple Rejection Ripple Rejection 7 30141346 30141349 30141351 www.national.com ...

Page 8

Shutdown Threshold Voltage Maximum Rated Output Current Output Capacitor ESR Range www.national.com Line Regulation 30141354 Thermal Response 30141357 30141363 8 30141355 30141358 ...

Page 9

Application Hints EXTERNAL CAPACITORS A 1.0μF (or greater) capacitor is required between the output and ground for stability. Without this capacitor the part will oscillate. Most types of tantalum or aluminum electrolytics work fine here; even film types work but ...

Page 10

Schematic Diagram www.national.com 10 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted D-Pak Package NS Package Number TD03B 11 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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