Tesis

www.fairchildsemi.com

KA78XX/KA78XXA

3-Terminal 1A Positive Voltage Regulator
Features
• • • • • Output Current up to 1A Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area Protection

Description
The KA78XX/KA78XXA series of three-terminal positive regulator are available in the TO-220/D-PAKpackage 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. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used withexternal components to obtain adjustable voltages and currents.
TO-220

1 D-PAK

1 1. Input 2. GND 3. Output

Internal Block Digram

Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation

KA78XX/KA78XXA

Absolute Maximum Ratings
Parameter Input Voltage (for VO = 5V to 18V) (for VO = 24V) Thermal Resistance Junction-Cases (TO-220) Thermal Resistance Junction-Air (TO-220) OperatingTemperature Range (KA78XX/A/R) Storage Temperature Range Symbol VI VI RθJC RθJA TOPR TSTG Value 35 40 5 65 0 ~ +125 -65 ~ +150
°

Unit V V C/W
° ° °C/W

C C

Electrical Characteristics (KA7805/KA7805R)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =10V, CI= 0.33µF, CO=0.1µF, unless otherwise specified) Parameter Symbol TJ =+25 oC Output Voltage VO 5.0mA ≤ Io ≤ 1.0A, PO ≤ 15W VI =7V to 20V TJ=+25 oC TJ=+25 oC TJ =+25 oC IO = 5mA to 1.0A VI= 7V to 25V IO= 5mA f = 10Hz to 100KHz, TA=+25 oC f = 120Hz VO = 8V to 18V IO = 1A, TJ =+25 oC f = 1KHz VI = 35V, TA =+25 TJ =+25 C
o oC

Conditions

KA7805 Min. 4.8 4.75 62 Typ. Max. 5.0 5.0 4.0 1.6 9 4 5.0 0.03 0.3 -0.8 42 73 2 15 230 2.2 5.2 5.25 100 50 100 50 8.0 0.5 1.3 -

Unit

V mV mV mA mA mV/ oC µV/VO dB V mΩ mA ALine Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current

Regline Regload IQ ∆IQ ∆VO/∆T VN RR VDrop rO ISC IPK

VO = 7V to 25V VI = 8V to 12V IO = 5.0mA to1.5A IO =250mA to 750mA

Note: 1. Load and line regulation are specified atconstant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulse testing with low duty is used.

2

KA78XX/KA78XXA

Electrical Characteristics (KA7806/KA7806R)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =11V, CI= 0.33µF, CO=0.1µF, unless otherwise specified) Parameter Symbol TJ =+25 oC Output Voltage VO 5.0mA ≤ IO ≤ 1.0A, PO ≤ 15WVI = 8.0V to 21V TJ =+25 oC TJ =+25 oC TJ =+25 oC IO = 5mA to 1A VI = 8V to 25V IO = 5mA f = 10Hz to 100KHz, TA =+25 oC f = 120Hz VI = 9V to 19V IO = 1A, TJ =+25 oC f = 1KHz VI= 35V, TA=+25 oC TJ =+25 C
o

Conditions

KA7806 Min. Typ. Max. 5.75 5.7 59 6.0 6.0 5 1.5 9 3 5.0 -0.8 45 75 2 19 250 2.2 6.25 6.3 120 60 120 60 8.0 0.5 1.3 -

Unit

V mV mV mA mA mV/ o C µV/Vo dB V mΩ mA A

LineRegulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current

Regline Regload IQ ∆IQ ∆VO/∆T VN RR VDrop rO ISC IPK

VI = 8V to 25V VI = 9V to 13V IO =5mA to 1.5A IO =250mA to750mA

Note: 1. Load and line regulation are specified at constantjunction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.

3

KA78XX/KA78XXA

Electrical Characteristics (KA7808/KA7808R)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =14V, CI= 0.33µF, CO=0.1µF, unless otherwise specified) Parameter Symbol TJ =+25 oC Output Voltage VO 5.0mA ≤ IO ≤ 1.0A, PO ≤ 15W VI =...