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LP4951CM/NOPB
Adjustable Micropower Voltage Regulators 8-SOIC -40 to 125
LP4950C-5V, LP4951C
www.ti.com SNVS208C–SEPTEMBER 2002–REVISED APRIL 2013
LP4950C-5V and LP4951C Adjustable Micropower Voltage Regulators
Checkfor Samples: LP4950C-5V, LP4951C
1FEATURES DESCRIPTIONThe LP4950C and LP4951C are micropower voltage
High Accuracy 5V Specified 100mA Output regulators with very low quiescent current (75μA typ.)
• Extremely Low Quiescent Current and very low dropout voltage (typ. 40mVat light loads
Low Dropout Voltage and 380mVat 100mA). They are ideally suited for
usein battery-powered systems. Furthermore, the
• Extremely Tight Load and Line Regulation quiescent current of the LP4950C/LP4951C
• Very Low Temperature Coefficient increases only slightlyin dropout, prolonging battery
• Useas Regulatoror Reference life.
Needs Only 1μF for Stability The LP4950Cin the popular 3-pin TO-92 packageis
Current and Thermal Limiting pin compatible with older 5V regulators. The 8-lead
LP4951Cis available ina plastic surface mount
package and offers additional system functions.
LP4951C VERSIONS ONLY One such featureisan error flag output which warnsa low output voltage, often dueto falling batteries
• Error Flag Warnsof Output Dropout the input.It may be used fora power-on reset.A
• Logic-controlled Electronic Shutdown second featureis the logic-compatible shutdown input
• Output Pogrammable From 1.24to 29V which enables the regulatorto be switched on and
off. Also, the part may be pin-strapped fora 5V
output or programmed from 1.24Vto 29V with an
external pairof resistors.
Careful design of the LP4950C/LP4951C has
minimizedall contributionsto the error budget. This
includesa tight initial tolerance (.5% typ.), extremely
good load and line regulation (.05% typ.) anda very
low output voltage temperature coefficient, making
the part usefulasa low-power voltage reference.
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
LP4950C LP4951C
