LM317HVK

更新时间： 2024-11-19 04:59:47

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
15页	472K
描述
3-Terminal Adjustable Regulator

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LM317HVK 数据手册

April 2000

LM117HV/LM317HV

3-Terminal Adjustable Regulator

Also, it makes an especially simple adjustable switching

regulator, a programmable output regulator, or by connecting

a fixed resistor between the adjustment and output, the

LM117HV can be used as a precision current regulator. Sup-

plies with electronic shutdown can be achieved by clamping

the adjustment terminal to ground which programs the out-

put to 1.2V where most loads draw little current.

General Description

The LM117HV/LM317HV are adjustable 3-terminal positive

voltage regulators capable of supplying in excess of 1.5A

over a 1.2V to 57V output range. They are exceptionally

easy to use and require only two external resistors to set the

output voltage. Further, both line and load regulation are bet-

ter than standard fixed regulators. Also, the LM117HV is

packaged in standard transistor packages which are easily

mounted and handled.

The LM117HVK STEEL and LM317HVK STEEL are pack-

aged in standard TO-3 transistor packages, while the

LM117HVH and LM317HVH are packaged in a solid Kovar

base TO-39 transistor package. The LM317HVT uses a TO-

220 plastic package. The LM117HV is rated for operation

from −55˚C to +150˚C, and the LM317HV from 0˚C to

+125˚C.

In addition to higher performance than fixed regulators, the

LM117HV series offers full overload protection available only

in IC’s. Included on the chip are current limit, thermal over-

load protection and safe area protection. All overload protec-

tion circuitry remains fully functional even if the adjustment

terminal is disconnected.

Features

Normally, no capacitors are needed unless the device is situ-

ated more than 6 inches from the input filter capacitors in

which case an input bypass is needed. An optional output

capacitor can be added to improve transient response. The

adjustment terminal can be bypassed to achieve very high

ripple rejections ratios which are difficult to achieve with

standard 3-terminal regulators.

n Adjustable output down to 1.2V

n Guaranteed 1.5A output current

n Line regulation typically 0.01%/V

n Load regulation typically 0.1%

n Current limit constant with temperature

n 100% electrical burn-in

Besides replacing fixed regulators, the LM117HV is useful in

a wide variety of other applications. Since the regulator is

“floating” and sees only the input-to-output differential volt-

age, supplies of several hundred volts can be regulated as

long as the maximum input to output differential is not ex-

ceeded, i.e. do not short the output to ground.

n Eliminates the need to stock many voltages

n Standard 3-lead transistor package

n 80 dB ripple rejection

n Output is short-circuit protected

n P⁺Product Enhancement tested

Typical Applications

1.2V-45V Adjustable Regulator

DS009062-1

Full output current not available at high input-output voltages

†

Optional — improves transient response. Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum electrolytic

are commonly used to provide improved output impedance and rejection of transients.

*Needed if device is more than 6 inches from filter capacitors.

DS009062

www.national.com

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LM317HVK 替代型号

型号	品牌	替代类型	描述	数据表
LM117HVK/883	TI	功能相似	3-Terminal Adjustable Regulator

与LM317HVK相关器件

型号	品牌	获取价格	描述	数据表
LM317HVKSTEEL	NSC	获取价格	IC VREG 1.2 V-57 V ADJUSTABLE POSITIVE REGULATOR, MBFM2, METAL CAN, TO-3, 2 PIN, Adjustabl
LM317HVK-STEEL	NSC	获取价格	Positive Adjustable Voltage Regulator
LM317HVKSTEEL/NOPB	NSC	获取价格	IC VREG 1.2 V-57 V ADJUSTABLE POSITIVE REGULATOR, MBFM2, ROHS COMPLIANT, METAL CAN, TO-3,
LM317HVR	ETC	获取价格	Analog IC
LM317HVT	NSC	获取价格	3-Terminal Adjustable Regulator
LM317HVT/NOPB	TI	获取价格	1.5-A, 60-V, adjustable linear voltage regulator 3-TO-220 0 to 125
LM317H-XX-AR	TAITRON	获取价格	Adustable Positive Voltage Regulator
LM317H-XX-BL	TAITRON	获取价格	Adustable Positive Voltage Regulator
LM317H-XX-TR30	TAITRON	获取价格	Adustable Positive Voltage Regulator
LM317H-XX-TR70	TAITRON	获取价格	Adustable Positive Voltage Regulator

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