Datasheet > LM2940T

LM2940T

更新时间： 2024-11-23 04:44:31

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
20页	557K
描述
1A Low Dropout Regulator

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LM2940T 数据手册

January 2007

LM2940/LM2940C

1A Low Dropout Regulator

General Description

age, the regulator will automatically shut down to protect both

the internal circuits and the load. The LM2940/LM2940C can-

not be harmed by temporary mirror-image insertion. Familiar

regulator features such as short circuit and thermal overload

protection are also provided.

The LM2940/LM2940C positive voltage regulator features the

ability to source 1A of output current with a dropout voltage of

typically 0.5V and a maximum of 1V over the entire temper-

ature range. Furthermore, a quiescent current reduction cir-

cuit has been included which reduces the ground current

when the differential between the input voltage and the output

voltage exceeds approximately 3V. The quiescent current

with 1A of output current and an input-output differential of 5V

is therefore only 30 mA. Higher quiescent currents only exist

when the regulator is in the dropout mode (V_IN− V_OUT≤ 3V).

Designed also for vehicular applications, the LM2940/

LM2940C and all regulated circuitry are protected from re-

verse battery installations or 2-battery jumps. During line

transients, such as load dump when the input voltage can

momentarily exceed the specified maximum operating volt-

Features

Dropout voltage typically 0.5V @I_O= 1A

■

Output current in excess of 1A

Output voltage trimmed before assembly

Reverse battery protection

Internal short circuit current limit

Mirror image insertion protection

P⁺Product Enhancement tested

Typical Application

882203

*Required if regulator is located far from power supply filter.

**C_OUTmust be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to

the regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.

Ordering Information

Temp

Range

Output Voltage

Package

5.0

8.0

–

9.0

–

LM2940CT-5.0

LM2940CS-5.0

LM2940CT-9.0

LM2940CS-9.0

LM2940CT-12 LM2940CT-15 TO-220

LM2940CS-12 LM2940CS-15

0°C

–

≤ T_J≤

125°C

TO-263

LM2940CSX

-5.0

LM2940CSX

-9.0

LM2940CSX

-12

LM2940CSX

-15

–

LLP

1k Units

Tape and

Reel

LM2940LD-5.0 LM2940LD-8.0 LM2940LD-9.0 LM2940LD-10 LM2940LD-12 LM2940LD-15

−40°C

≤ T_J≤

125°C

LLP

4.5k

Units

Tape and

Reel

LM2940LDX

-5.0

LM2940LDX

-8.0

LM2940LDX

-9.0

LM2940LDX

-10

LM2940LDX

-12

LM2940LDX

-15

LM2940T-5.0

LM2940S-5.0

LM2940T-8.0

LM2940S-8.0

LM2940T-9.0

LM2940S-9.0

LM2940T-10

LM2940S-10

LM2940T-12

LM2940S-12

TO-220

–

−40°C

≤ T_J≤

125°C

TO-263

LM2940SX-5.0 LM2940SX-8.0 LM2940SX-9.0 LM2940SX-10 LM2940SX-12

8822

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与LM2940T相关器件

型号	品牌	获取价格	描述	数据表
LM2940T-10	NSC	获取价格	1A Low Dropout Regulator
LM2940T-10.0	TI	获取价格	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940T-10.0/NOPB	TI	获取价格	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940T-10/A+	ETC	获取价格	Positive Fixed Voltage Regulator
LM2940T-10/B+	ETC	获取价格	Positive Fixed Voltage Regulator
LM2940T-12	NSC	获取价格	1A Low Dropout Regulator
LM2940T-12.0	TI	获取价格	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940T-12.0/NOPB	TI	获取价格	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940T-5.0	TI	获取价格	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940T-5.0	NSC	获取价格	1A Low Dropout Regulator

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