LM7805 - LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators

LM7805 - LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators

 

Texas Instruments

 

Description

The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal current limiting, thermal shutdown, and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications, including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characteristics table.

 

LM340 및 LM7805 시리즈의 단일 칩 3단자 양극성 전압 레귤레이터는 내부 전류 제한, 열 차단, 안전 구역 보상을 포함하여 사실상 파손되지 않는 특성을 갖추고 있습니다. 충분한 방열이 제공되면 1.5A 이상의 출력 전류를 공급할 수 있습니다. 이들은 다양한 응용 분야에서 고정 전압 레귤레이터로 사용되며, 특히 단일 지점 조정에서 발생하는 잡음과 분배 문제를 해결하기 위한 국소적(on-card) 전압 조정에 적합합니다.

이 장치들은 고정 전압 레귤레이터로 사용될 뿐만 아니라, 외부 부품과 함께 사용하여 조정 가능한 출력 전압과 전류를 얻을 수 있습니다. 또한, 이 시리즈 레귤레이터는 사용이 쉽고 외부 부품 수를 최소화하도록 설계되었습니다. 출력 바이스패스는 필수는 아니지만 과도 응답을 향상시키며, 입력 바이스패스는 전원 공급 장치의 필터 커패시터에서 레귤레이터가 멀리 떨어져 있는 경우에만 필요합니다.

LM7805는 더 높은 정확도와 성능을 갖춘 버전(LM340A)도 제공됩니다. 자세한 내용은 LM340A 전기적 특성 표에서 LM340A의 사양을 참조하십시오.

 

employ : 1. 고용하다 2. 쓰다

compensation : 보상

essentially : 근본[기본/본질]적으로

indestructible : (쉽게) 파괴할 수 없는

adequate :  (특정한 목적이나 필요에) 충분한[적절한]

intended : ...을 의도하다.

distribution :분배 (방식), 분포

obtain : (특히 노력 끝에) 얻다[구하다/입수하다]

 

Features
 • Output Current up to 1.5 A
 • Available in Fixed 5-V, 12-V, and 15-V Options
 • Output Voltage Tolerances of ±2% at TJ = 25°C (LM340A)
 • Line Regulation of 0.01% / V of at 1-A Load (LM340A)
 • Load Regulation of 0.3% / A (LM340A)
 • Internal Thermal Overload, Short-Circuit and SOA Protection
 • Available in Space-Saving SOT-223 Package
 • Output Capacitance Not Required for Stability

 

 

 

 

 

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