LP4951 Series

100-mA, 30-V, adjustable low-dropout voltage regulator with power good & enable

Catalog(4 parts)

Part	Mounting Type	Voltage - Input (Max)▲▼	Voltage - Output (Min/Fixed)▲▼	Voltage - Output (Max)▲▼	Protection Features	Output Type	Voltage Dropout (Max)▲▼	Supplier Device Package	Current - Quiescent (Iq)▲▼	Number of Regulators▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Package / Case▲▼	Package / Case	Control Features	Output Configuration	Current - Output▲▼	Current - Supply (Max)▲▼
Texas Instruments LP4951CMX/NOPB Linear Voltage Regulator IC Positive Adjustable 1 Output 100mA 8-SOIC	Surface Mount	30 V	1.2350000143051147 V	30 V	Over Current, Over Temperature	Adjustable	0.6000000238418579 V	8-SOIC	0.00016999999934341758 A	1 ul	125 °C	-40 °C	0.003899999894201755 m	8-SOIC	Enable	Positive	0.10000000149011612 A	0.01899999938905239 A
Texas Instruments LP4951CMX Linear Voltage Regulator IC Positive Adjustable 1 Output 100mA 8-SOIC	Surface Mount	30 V	1.2350000143051147 V	30 V	Over Current, Over Temperature	Adjustable	0.6000000238418579 V	8-SOIC	0.00016999999934341758 A	1 ul	125 °C	-40 °C	0.003899999894201755 m	8-SOIC	Enable	Positive	0.10000000149011612 A	0.01899999938905239 A
Texas Instruments LP4951CM Linear Voltage Regulator IC Positive Adjustable 1 Output 100mA 8-SOIC	Surface Mount	30 V	1.2350000143051147 V	30 V	Over Current, Over Temperature	Adjustable	0.6000000238418579 V	8-SOIC	0.00016999999934341758 A	1 ul	125 °C	-40 °C	0.003899999894201755 m	8-SOIC	Enable	Positive	0.10000000149011612 A	0.01899999938905239 A
Texas Instruments LP4951CM/NOPB Linear Voltage Regulator IC Positive Adjustable 1 Output 100mA 8-SOIC	Surface Mount	30 V	1.2350000143051147 V	30 V	Over Current, Over Temperature	Adjustable	0.6000000238418579 V	8-SOIC	0.00016999999934341758 A	1 ul	125 °C	-40 °C	0.003899999894201755 m	8-SOIC	Enable	Positive	0.10000000149011612 A	0.01899999938905239 A

Key Features

• High Accuracy 5V Specified 100mA OutputExtremely Low Quiescent CurrentLow Dropout VoltageExtremely Tight Load and Line RegulationVery Low Temperature CoefficientUse as Regulator or ReferenceNeeds Only 1μF for StabilityCurrent and Thermal LimitingLP4951C Versions OnlyError Flag Warns of Output DropoutLogic-controlled Electronic ShutdownOutput Pogrammable From 1.24 to 29VAll trademarks are the property of their respective owners.High Accuracy 5V Specified 100mA OutputExtremely Low Quiescent CurrentLow Dropout VoltageExtremely Tight Load and Line RegulationVery Low Temperature CoefficientUse as Regulator or ReferenceNeeds Only 1μF for StabilityCurrent and Thermal LimitingLP4951C Versions OnlyError Flag Warns of Output DropoutLogic-controlled Electronic ShutdownOutput Pogrammable From 1.24 to 29VAll trademarks are the property of their respective owners.

Description

The LP4950C and LP4951C are micropower voltage regulators with very low quiescent current (75μA typ.) and very low dropout voltage (typ. 40mV at light loads and 380mV at 100mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP4950C/LP4951C increases only slightly in dropout, prolonging battery life. The LP4950C in the popular 3-pin TO-92 package is pin compatible with older 5V regulators. The 8-lead LP4951C is available in a plastic surface mount package and offers additional system functions. One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5V output or programmed from 1.24V to 29V with an external pair of resistors. Careful design of the LP4950C/LP4951C has minimized all contributions 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. The LP4950C and LP4951C are micropower voltage regulators with very low quiescent current (75μA typ.) and very low dropout voltage (typ. 40mV at light loads and 380mV at 100mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP4950C/LP4951C increases only slightly in dropout, prolonging battery life. The LP4950C in the popular 3-pin TO-92 package is pin compatible with older 5V regulators. The 8-lead LP4951C is available in a plastic surface mount package and offers additional system functions. One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5V output or programmed from 1.24V to 29V with an external pair of resistors. Careful design of the LP4950C/LP4951C has minimized all contributions 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.