LP2957A Series

250-mA, 30-V, low-dropout voltage regulator with high accuracy & power good

Catalog

250-mA, 30-V, low-dropout voltage regulator with high accuracy & power good

Part	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output	Supplier Device Package	Output Configuration	Current - Quiescent (Iq)	Protection Features	Control Features	Mounting Type	Voltage Dropout (Max) [Max]	Output Type	Voltage - Output (Min/Fixed)	Number of Regulators	Current - Supply (Max) [Max]	Voltage - Input (Max) [Max]
Texas Instruments LP2957IT	TO-220-5 Formed Leads	125 °C	-40 °C	250 mA	TO-220-5	Positive	200 µA	Over Current Over Temperature Reverse Polarity	Enable	Through Hole	0.8 V	1.81 mOhm	5 V	1	33 mA	30 V
Texas Instruments LP2957ISX	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	125 °C	-40 °C	250 mA	TO-263 (DDPAK-5)	Positive	200 µA	Over Current Over Temperature Reverse Polarity	Enable	Surface Mount	0.8 V	1.81 mOhm	5 V	1	33 mA	30 V
Texas Instruments LP2957AISX/NOPB	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	125 °C	-40 °C	250 mA	TO-263 (DDPAK-5)	Positive	200 µA	Over Current Over Temperature Reverse Polarity	Enable	Surface Mount	0.8 V	1.81 mOhm	5 V	1	33 mA	30 V
Texas Instruments LP2957AISX	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	125 °C	-40 °C	250 mA	TO-263 (DDPAK-5)	Positive	200 µA	Over Current Over Temperature Reverse Polarity	Enable	Surface Mount	0.8 V	1.81 mOhm	5 V	1	33 mA	30 V
Texas Instruments LP2957AIS/NOPB	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	125 °C	-40 °C	250 mA	TO-263 (DDPAK-5)	Positive	200 µA	Over Current Over Temperature Reverse Polarity	Enable	Surface Mount	0.8 V	1.81 mOhm	5 V	1	33 mA	30 V

Catalog

250-mA, 30-V, low-dropout voltage regulator with high accuracy & power good

Key Features

• 5V Output within 1.4% Over Temperature (A Grade)Easily Programmed for Snap-On/Snap-Off OutputEnsured 250 mA Output CurrentExtremely Low Quiescent CurrentLow Input-Output Voltage Required for RegulationReverse Battery ProtectionExtremely Tight Line and Load RegulationVery Low Temperature CoefficientCurrent and Thermal LimitingError Flag Signals when Output is out of RegulationAll trademarks are the property of their respective owners.5V Output within 1.4% Over Temperature (A Grade)Easily Programmed for Snap-On/Snap-Off OutputEnsured 250 mA Output CurrentExtremely Low Quiescent CurrentLow Input-Output Voltage Required for RegulationReverse Battery ProtectionExtremely Tight Line and Load RegulationVery Low Temperature CoefficientCurrent and Thermal LimitingError Flag Signals when Output is out of RegulationAll trademarks are the property of their respective owners.

Description

The LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150 µA typical at 1 mA load), and very low dropout voltage (470 mV typical at 250 mA load current). Output can be wired for snap-on/snap-off operation to eliminate transition voltage states where µP operation may be unpredictable. Output crowbar (50 mA typical pull-down current) will bring down the output quickly when the regulator snaps off or when the shutdown function is activated. The part has tight line and load regulation (0.04% typical) and low output temperature coefficient (20 ppm/°C typical). The accuracy of the 5V output is ensured at room temperature and over the full operating temperature range. The LP2957 is available in the five-lead TO-220 and DDPAK/TO-263 packages. The LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150 µA typical at 1 mA load), and very low dropout voltage (470 mV typical at 250 mA load current). Output can be wired for snap-on/snap-off operation to eliminate transition voltage states where µP operation may be unpredictable. Output crowbar (50 mA typical pull-down current) will bring down the output quickly when the regulator snaps off or when the shutdown function is activated. The part has tight line and load regulation (0.04% typical) and low output temperature coefficient (20 ppm/°C typical). The accuracy of the 5V output is ensured at room temperature and over the full operating temperature range. The LP2957 is available in the five-lead TO-220 and DDPAK/TO-263 packages.