LM7909 Fairchild Semiconductor, LM7909 Datasheet

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LM7909

Manufacturer Part Number
LM7909
Description
The LM79XX series of three terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications
Manufacturer
Fairchild Semiconductor
Datasheet

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Features
• Output Current in Excess of 1A
• Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and -
• Internal Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Compensation
Internal Block Digram
©2011 Fairchild Semiconductor Corporation
LM79XX
3-Terminal 1A Negative Voltage Regulator
24V
GND
REFERENCE
I1
VOLTAGE
I2
+
-
PROTECTION
CIRCUITRY
Description
The LM79XX series of three terminal negative regulators
are available in TO-220 package and with several fixed
output voltages, making them useful in a wide range
of applications. Each type employs internal current limiting,
thermal shut down and safe operating area protection,
making it essentially indestructible.
1. GND 2. Input 3. Output
TO-220 (Single Gauge)
1
Vin
Q1
Q2
www.fairchildsemi.com
R1
R2
Rsc
Input
Output
Out
In
Rev. 1.0.3

Related parts for LM7909

LM7909 Summary of contents

Page 1

... Internal Block Digram GND VOLTAGE REFERENCE I1 ©2011 Fairchild Semiconductor Corporation Description The LM79XX series of three terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible ...

Page 2

LM79XX Absolute Maximum Ratings Parameter Input Voltage Thermal Resistance Junction-Case (Note1) Thermal Resistance Junction-Air (Note1, 2) Operating Temperature Range Storage Temperature Range Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume ...

Page 3

Electrical Characteristics (LM7906) = 500mA, 0°C ≤ -11V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage ...

Page 4

LM79XX Electrical Characteristics (LM7908) = 500mA, 0°C ≤ -14V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage ...

Page 5

... Electrical Characteristics (LM7909) = 500mA, 0°C ≤ -15V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current Note: 1. Load and line regulation are specified at constant junction temperature. Changes in V into account separately ...

Page 6

Electrical Characteristics (LM7910) = 500mA, 0°C ≤ -17V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage Short ...

Page 7

LM79XX Electrical Characteristics (LM7912) = 500mA, 0°C ≤ -19V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage ...

Page 8

Electrical Characteristics (LM7915) = 500mA, 0°C ≤ -23V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage Short ...

Page 9

LM79XX Electrical Characteristics (LM7918) = 500mA, 0°C ≤ -27V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage ...

Page 10

LM79XX Electrical Characteristics (LM7924) = 500mA, 0°C ≤ -33V Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient Output Noise Voltage Ripple Rejection Dropout Voltage ...

Page 11

Typical Performance Characteristics 5.1 5. 4.95 lta ge 4 4.85 4.8 -40 - Ambient Temperature [ A Figure 1. Output Voltage 5 4.5 4 3.5 3 2.5 2 1.5 ...

Page 12

LM79XX Typical Applications Notes: (1) To specify an output voltage, substitute voltage value for "XX " (2) Required for stability. For value given, capacitor must be solid tantalum. If aluminium electronics are used, at least ten times value shown should ...

Page 13

Mechanical Dimensions Package TO-220 [ SINGLE GAUGE ] Dimensions in millimeters LM79XX 13 ...

Page 14

... LM79XX Ordering Information Product Number Output Voltage Tolerance LM7905CT LM7906CT LM7908CT LM7909CT LM7910CT LM7912CT LM7915CT LM7918CT LM7924CT 14 Package TO-220 ±4% (Single Gauge) Operating Temperature 0 ~ +125°C ...

Page 15

... LM79XX DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...

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