LP2957A

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具有高精度和电源正常指示功能的 250mA、30V、低压降稳压器

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数据表

document-pdfAcrobat LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications 数据表 (Rev. C) (英语)

LP2957A

正在供货

数据表

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产品详情

Output options

Fixed Output

Iout (max) (A)

0.25

Vin (max) (V)

Vin (min) (V)

-20

Vout (max) (V)

Vout (min) (V)

Fixed output options (V)

Noise (µVrms)

320

Iq (typ) (mA)

0.15

Thermal resistance θJA (°C/W)

Rating

Catalog

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

Features

Enable, Power good

Accuracy (%)

PSRR at 100 KHz (dB)

Dropout voltage (Vdo) (typ) (mV)

470

Operating temperature range (°C)

-40 to 125

Output options

Fixed Output

Iout (max) (A)

0.25

Vin (max) (V)

Vin (min) (V)

-20

Vout (max) (V)

Vout (min) (V)

Fixed output options (V)

Noise (µVrms)

320

Iq (typ) (mA)

0.15

Thermal resistance θJA (°C/W)

Rating

Catalog

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

Features

Enable, Power good

Accuracy (%)

PSRR at 100 KHz (dB)

Dropout voltage (Vdo) (typ) (mV)

470

Operating temperature range (°C)

-40 to 125

TO-220 (NDH)

86.0552 mm² 10.16 x 8.47

TO-263 (KTT)

154.8384 mm² 10.16 x 15.24

5V Output within 1.4% Over Temperature (A Grade)
Easily Programmed for Snap-On/Snap-Off Output
Ensured 250 mA Output Current
Extremely Low Quiescent Current
Low Input-Output Voltage Required for Regulation
Reverse Battery Protection
Extremely Tight Line and Load Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Error Flag Signals when Output is out of Regulation

All trademarks are the property of their respective owners.

5V Output within 1.4% Over Temperature (A Grade)
Easily Programmed for Snap-On/Snap-Off Output
Ensured 250 mA Output Current
Extremely Low Quiescent Current
Low Input-Output Voltage Required for Regulation
Reverse Battery Protection
Extremely Tight Line and Load Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Error Flag Signals when Output is out of Regulation

All trademarks are the property of their respective owners.

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.

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.

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