器件名称: MC7905
功能描述: 3-Terminal 1A Negative Voltage Regulator
文件大小: 117.76KB 共18页
简 介:www.fairchildsemi.com
MC79XX/MC79XXA/LM79XX
3-Terminal 1A Negative Voltage Regulator
Features
Output Current in Excess of 1A Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and 24V Internal Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area Compensation
Description
The MC79XX / MC79XXA/ 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.
TO-220
Vin
1
1. GND 2. Input 3. Output
Internal Block Digram
GND
R1 VOLTAGE REFERENCE
R2
Output Out
+
Q1
Q2 PROTECTION CIRCUITRY Rsc
I1
I2
Input
In
Rev. 1.0.1
2002 Fairchild Semiconductor Corporation
MC79XX/MC79XXA/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 no ambient airflow
Symbol VI RθJC RθJA TOPR TSTG
Value -35 5 65 0 ~ +125 -65 ~ +150
Unit V °C/W °C °C
Electrical Characteristics (MC7905/LM7905)
(VI = -10V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5mA to 1A……
