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LM2991WG-QML

更新时间： 2024-11-12 22:10:39

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
11页	341K
描述
Negative Low Dropout Adjustable Regulator

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技术参数
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LM2991WG-QML 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	SOP, SOP16,.4	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.18	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-GDSO-G16	JESD-609代码：	e0
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：	SOP	封装等效代码：	SOP16,.4
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
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：	2.33 mm	子类别：	Other Regulators
表面贴装：	YES	技术：	BIPOLAR
端子面层：	Tin/Lead (Sn63Pb37)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	6.35 mm
Base Number Matches：	1

LM2991WG-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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LM2991WG-QML 替代型号

型号	品牌	替代类型	描述	数据表
5962-9650502QXA	TI	功能相似	LM2991QML Negative Low Dropout Adjustable Regulator

与LM2991WG-QML相关器件

型号	品牌	获取价格	描述	数据表
LM299AH	NSC	获取价格	IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4, Voltage Reference
LM299AH	TI	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95V, MBCY4
LM299AH-20	ROCHESTER	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95V, MBCY4
LM299H	ETC	获取价格	Voltage Reference
LM299H/NOPB	TI	获取价格	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95V, MBCY4
LM2A228M2550LC	SAMWHA	获取价格	Aluminum Electrolytic Capacitor, Polarized, Aluminum (wet), 100V, 20% +Tol, 20% -Tol, 2200
LM2-AHR1-F1	MARKTECH	获取价格	Red Power SMT LED
LM2-AHR1-F1-N1-MT	MARKTECH	获取价格	Visible LED
LM2-AYL1-F1	MARKTECH	获取价格	Yellow Power SMT LED
LM2-AYL1-F1-N1	MARKTECH	获取价格	Visible LED

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