HomedatasheetCLM2950ACN-X

CLM2950ACN-X Datasheet

150ma Low Dropout Voltage Regulators
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Description

Features, Applications

FEATURES PRODUCT DESCRIPTION Calogic's CLM2950 and CLM2951 are low power voltage regulators. These devices are an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The CLM2950 and CLM2951 features very low quiescent current and very low dropout voltage (Typ. 50mV at light load and at 100mA). This includes a tight initial tolerance of 0.5% typ., extremely good load and line regulation of 0.05% typ. and very low output temperature coefficient, making the CLM2950/CLM2951 useful as a low-power voltage reference. Other key additional features of this device includes higher output current (150mA), positive transient protection to 60V (Load dump), and the ability to survive an unregulated input voltage transient of -20V below ground (reverse battery). The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. The CLM2950 is offered 3-pin TO-92 package compatible with other 5 volt regulators. The CLM2951 is also available in 8-pin plastic and SO-8. The regulator output voltage may be pin-strapped for 5V, 3.3V and 3.0 volts or programmed from 1.24 volt to 29 volts with an external pair of resistors. ORDERING INFORMATION PART CLM2951ACS-X CLM2951CS-X PACKAGE TEMPERATURE RANGE IND. TO-92 (3-Pin) Plastic DIP (8-Pin) Plastic DIP (8-Pin) Plastic SOIC (8-Pin) Plastic SOIC (8-Pin)

5V, 3.3V, and 3.0V Versions at 150mA Output Very Low Quiescent Current Dropout Voltage Low Extremely Tight Load and Line Regulation Very Low Temperature Coefficient Only 1�F for Stability Needs Current and Thermal Limiting Unregulated DC Input can Withstand -20V Reverse Battery and +60V Positive Transients Similar Replacement for LP2950/LP2951 Sockets

CLM2951 Versions Only Error Flag Warns of Output Dropout Logic-Controlled Electronic Shutdown Output Programmable from to 29V

APPLICATIONS

Battery Powered Systems Cordless Telephones Control Systems Radio Portable / Palm Top / Notebook Computers Portable Consumer Equipment Instrumentation Portable Avionics Automotive Electronics Post-Regulator SMPS Voltage Reference

OUTPUT SENSE SHUTDOWN GROUND 3 4 TOP VIEW OR 3.3V TAP ERROR 8 7 INPUT FEEDBACK

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

ABSOLUTE MAXIMUM RATINGS Power Dissipation. Internally Limited Lead Temp. (Soldering, 5 Seconds). 260 oC Storage Temperature Range. to +150oC Operating Junction Temperature Range to +125oC Input Supply Voltage. to +60V Feedback Input Voltage. to +30V Shutdown Input Voltage. to +30V Error Comparator Output. to +30V ESD Rating. 2KV Min

TJ 85oC Full Operating Temperature IL 150mA,TJ TJMAX TJ 85oC Full Operating Temperature 150mA, TJ TJMAX TJ 85oC Full Operating Temperature 150mA, TJ TJMAX

Voh = 30V VIN = 4.5V, IOL = 400�A (Note 8) (Note 8) (Note 8) Low (Regulator ON) High (Regulator OFF) = 30V (Note 9)

Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Unless otherwise specified all limits guaranteed for = 25oC, VIN 100 �A and = 1 �F. Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output Sense (VOUT = 5V) and VSHUTDOWN 0.8V. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Line regulation for the CLM2951 is tested at 150oC for = 1mA. For = 100�A and = 125oC, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage 2V (2.3V over temperature) must be taken input account. Note 6: VREF VOUT (VIN 1V), 2.3 VIN TJ T JMAX. Note 7: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temprtature range. Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V OUT/VREF = (R1+R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 9: VSHUTDOWN 2V, VIN 30V, VOUT = 0, Feedback pin tied to 5V Tap. Note 10: All typical values are not guaranteed.

UNREGULATED DC 7 FEEDBACK 8 INPUT 1 OUTPUT 2 SENSE + 3 FROM CMOS OR TTL SHUTDOWN + 1.23V REFERENCE GROUND CLM2950 AND CLM2951 BLOCK DIAGRAM


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CALOGIC, LLC
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