LM2991J-QML

更新时间： 2024-11-22 22:25:23

品牌	Logo	应用领域
美国国家半导体 - NSC		线性稳压器IC 调节器电源电路输出元件
页数	文件大小	规格书
11页	341K
描述
Negative Low Dropout Adjustable Regulator

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中文翻译

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技术参数
数据手册

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LM2991J-QML 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	CERAMIC, DIP-16	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.71	Is Samacsys：	N
可调性：	ADJUSTABLE	最大回动电压 1：	1 V
标称回动电压 1：	0.6 V	JESD-30 代码：	R-GDIP-T16
JESD-609代码：	e0	长度：	19.43 mm
最大电网调整率 (%/V)：	0.04	最大负载调整率 (%)：	0.4%
湿度敏感等级：	1	功能数量：	1
输出次数：	1	端子数量：	16
工作温度TJ-Max：	125 °C	工作温度TJ-Min：	-40 °C
最大输出电流 1：	1 A	最大输出电压 1：	24 V
最小输出电压 1：	3 V	封装主体材料：	CERAMIC, GLASS-SEALED
封装代码：	DIP	封装等效代码：	DIP16,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
包装方法：	RAIL	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	调节器类型：	ADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR
筛选级别：	MIL-PRF-38535 Class Q	座面最大高度：	5.08 mm
子类别：	Other Regulators	表面贴装：	NO
技术：	BIPOLAR	端子面层：	Tin/Lead (Sn63Pb37)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	7.62 mm	Base Number Matches：	1

LM2991J-QML 数据手册

May 1999

LM2991

Negative Low Dropout Adjustable Regulator

General Description

Features

n Output voltage adjustable from −3V to −24V, typically

−2V to −25V

The LM2991 is a low dropout adjustable negative regulator

with a output voltage range between −3V to −24V. The

LM2991 provides up to 1A of load current and features a On

/Off pin for remote shutdown capability.

n Output current in excess of 1A

n Dropout voltage typically 0.6V at 1A load

n Low quiescent current

n Internal short circuit current limit

n Internal thermal shutdown with hysteresis

n TTL, CMOS compatible ON/OFF switch

n Functional complement to the LM2941 series

The LM2991 uses new circuit design techniques to provide a

low dropout voltage, low quiescent current and low tempera-

ture coefficient precision reference. The dropout voltage at

1A load current is typically 0.6V and

a guaranteed

worst-case maximum of 1V over the entire operating tem-

perature range. The quiescent current is typically 1 mA with

a 1A load current and an input-output voltage differential

greater than 3V. A unique circuit design of the internal bias

supply limits the quiescent current to only 9 mA (typical)

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

Applications

n Post switcher regulator

n Local, on-card, regulation

n Battery operated equipment

The LM2991 is short-circuit proof, and thermal shutdown in-

cludes hysteresis to enhance the reliability of the device

when inadvertently overloaded for extended periods. The

LM2991 is available in 5-lead TO-220 and TO-263 packages

and is rated for operation over the automotive temperature

range of −40˚C to +125˚C. Mil-Aero versions are also avail-

able.

Typical Application

DS011260-1

(1 + R2/R1)

REF

OUT

*Required if the regulator is located further than 6 inches from the power supply filter capacitors. A 1 µF solid tantalum or a 10 µF aluminum electrolytic

capacitor is recommended.

*Required for stability. Must be at least a 10 µF aluminum electrolytic or a 1 µF solid tantalum to maintain stability. May be increased without bound to

maintain regulation during transients. Locate the capacitor as close as possible to the regulator. The equivalent series resistance (ESR) is critical, and

should be less than 10Ω over the same operating temperature range as the regulator.

DS011260

www.national.com

12 3 4 5 6 7...11

中文翻译

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与LM2991J-QML相关器件

型号	品牌	获取价格	描述	数据表
LM2991J-QMLV	TI	获取价格	3 V-24V ADJUSTABLE NEGATIVE LDO REGULATOR, 1V DROPOUT, CDIP16, CERAMIC, DIP-16
LM2991J-QMLV	NSC	获取价格	Negative Low Dropout Adjustable Regulator
LM2991MD8	NSC	获取价格	IC VREG 3 V-24 V ADJUSTABLE NEGATIVE LDO REGULATOR, 1 V DROPOUT, UUC, DIE, Adjustable Nega
LM2991MD8	TI	获取价格	Negative Low Dropout Adjustable Regulator
LM2991MDC	NSC	获取价格	IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,DIE
LM2991MDS	NSC	获取价格	IC VREG 3 V-24 V ADJUSTABLE NEGATIVE LDO REGULATOR, 1 V DROPOUT, UUC, DIE, Adjustable Nega
LM2991MWC	NSC	获取价格	IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,WAFER
LM2991MWC	TI	获取价格	Negative Low Dropout Adjustable Regulator
LM2991QML	NSC	获取价格	Negative Low Dropout Adjustable Regulator
LM2991QML	TI	获取价格	LM2991QML Negative Low Dropout Adjustable Regulator

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