LP2954

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250mA、30V、低压降稳压器

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数据表

document-pdfAcrobat LP2954, LP2954A 5-V and Adjustable Micropower LDOs 数据表 (Rev. E) (英语) PDF | HTML

LP2954

正在供货

数据表

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产品详情

Output options

Adjustable Output

Iout (max) (A)

0.25

Vin (max) (V)

Vin (min) (V)

-20

Vout (max) (V)

Vout (min) (V)

1.23

Noise (µVrms)

Iq (typ) (mA)

0.21

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)

800

Operating temperature range (°C)

-40 to 125

Output options

Adjustable Output

Iout (max) (A)

0.25

Vin (max) (V)

Vin (min) (V)

-20

Vout (max) (V)

Vout (min) (V)

1.23

Noise (µVrms)

Iq (typ) (mA)

0.21

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)

800

Operating temperature range (°C)

-40 to 125

SOIC (D)

29.4 mm² 4.9 x 6

TO-220 (NDE)

46.5328 mm² 10.16 x 4.58

TO-263 (KTT)

154.8384 mm² 10.16 x 15.24

5-V Output within 1.2% Over Temperature
(A Grade)
Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
Ensured 250-mA Output Current
Extremely Low Quiescent Current
Low Dropout Voltage
Reverse Battery Protection
Extremely Tight Line and Load Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Pin Compatible with LM2940 and LM340
(5-V Version Only)
Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown

5-V Output within 1.2% Over Temperature
(A Grade)
Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
Ensured 250-mA Output Current
Extremely Low Quiescent Current
Low Dropout Voltage
Reverse Battery Protection
Extremely Tight Line and Load Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Pin Compatible with LM2940 and LM340
(5-V Version Only)
Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown

The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).

The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.

The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.

Reverse battery protection is provided for the IN pin.

The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.

Output accuracy is ensured at both room temperature and over the entire operating temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).

The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.

Reverse battery protection is provided for the IN pin.

The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.

Output accuracy is ensured at both room temperature and over the entire operating temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.

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	类型	标题		日期
*	数据表	LP2954, LP2954A 5-V and Adjustable Micropower LDOs 数据表 (Rev. E)	PDF \| HTML	2016年 7月 28日
	应用手册	AN-1061 Power Conversion in Line-Powered Equipment (Rev. B)		2013年 4月 23日
	应用手册	Linear and Switching Voltage Regulator Fundamental Part 1		2007年 3月 21日

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参考设计

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设计指南: PDF

原理图: PDF