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LM2991S

更新时间： 2024-11-26 12:09:43
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德州仪器 - TI 稳压器
页数 文件大小 规格书
19页 2011K
描述
LM2991 Negative Low Dropout Adjustable Regulator

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LM2991S 技术参数

生命周期：Not Recommended零件包装代码：D2PAK
包装说明：TO-263, SMSIP5H,.6,67TB针数：4
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：7.36
可调性：ADJUSTABLE最大回动电压 1：1 V
标称回动电压 1：0.6 V最大输入电压：0.3 V
最小输入电压：26 VJESD-30 代码：R-PSSO-G5
JESD-609代码：e0长度：10.16 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：3功能数量：1
输出次数：1端子数量：5
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 1：25 V
最小输出电压 1：2 V封装主体材料：PLASTIC/EPOXY
封装代码：TO-263封装等效代码：SMSIP5H,.6,67TB
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
包装方法：TUBE峰值回流温度（摄氏度）：235
认证状态：Not Qualified调节器类型：ADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：4.8 mm子类别：Other Regulators
表面贴装：YES技术：BIPOLAR
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：1.7 mm端子位置：SINGLE
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.64 mm
Base Number Matches：1

LM2991S 数据手册

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LM2991  
www.ti.com  
SNVS099H –MAY 1999–REVISED JUNE 2013  
LM2991 Negative Low Dropout Adjustable Regulator  
Check for Samples: LM2991  
1
FEATURES  
DESCRIPTION  
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.  
2
•
Output Voltage Adjustable from −3V to −24V,  
Typically −2V to −25V  
•
•
•
•
•
•
•
Output Current in Excess of 1A  
Dropout Voltage Typically 0.6V at 1A Load  
Low Quiescent Current  
The LM2991 uses new circuit design techniques to  
provide a low dropout voltage, low quiescent current  
and low temperature coefficient precision reference.  
The dropout voltage at 1A load current is typically  
0.6V and an ensured worst-case maximum of 1V  
over the entire operating temperature 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  
(VOUT − VIN ≤ 3V).  
Internal Short Circuit Current Limit  
Internal Thermal Shutdown with Hysteresis  
TTL, CMOS Compatible ON/OFF Switch  
Functional Complement to the LM2941 Series  
APPLICATIONS  
•
•
•
Post Switcher Regulator  
Local, On-Card, Regulation  
Battery Operated Equipment  
The LM2991 is short-circuit proof, and thermal  
shutdown includes hysteresis to enhance the  
reliability of the device when inadvertently overloaded  
for extended periods. The LM2991 is available in 5-  
lead TO-220 and DDPAK/TO-263 packages and is  
rated for operation over the automotive temperature  
range of −40°C to +125°C. Mil-Aero versions are also  
available.  
Typical Application  
VOUT = VREF (1 + R2/R1)  
*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.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  
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中文翻译

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LM2991S 替代型号

型号 品牌 替代类型 描述 数据表
LT1175CQ Linear

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 LM2991 Negative Low Dropout Adjustable Regulator

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LM2991S/NOPB TI

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 		具有使能功能的 1A、负电压、可调节超低压降稳压器 | KTT | 5 | -40 to
LM2991SEP TI

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 		IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,SIP,5PIN,PLASTIC
LM2991SEP NSC

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 		IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,SIP,5PIN,PLASTIC
LM2991SEP/NOPB NSC

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 		IC,VOLT REGULATOR,ADJUSTABLE,-2 TO -25V,BIPOLAR,SIP,5PIN,PLASTIC
LM2991S-NOPB TI

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 		LM2991 Negative Low Dropout Adjustable Regulator
LM2991SX TI

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 		LM2991 Negative Low Dropout Adjustable Regulator
LM2991SX/NOPB TI

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 		具有使能功能的 1A、负电压、可调节超低压降稳压器 | KTT | 5 | -40 to
LM2991SX-NOPB TI

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 		LM2991 Negative Low Dropout Adjustable Regulator
LM2991T NSC

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 		Negative Low Dropout Adjustable Regulator
LM2991T TI

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 		LM2991 Negative Low Dropout Adjustable Regulator

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