Document
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
KA79XX / KA79XXA / LM79XX 3-Terminal 1 A Negative Voltage Regulator
September 2014
Features
• Output Current in Excess of 1 A • Output Voltages of: -5 V, -6 V, -8 V, -9 V, -12 V, -15 V,
-18 V, -24 V • Internal Thermal Overload Protection • Short-Circuit Protection • Output Transistor Safe Operating Area Compensation
Description
The KA79XX / KA79XXA / LM79XX series of three-terminal negative regulators are available in a TO-220 package with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shutdown, and safe operating area protection.
TO-220
Input
Ordering Information
Product Number
KA7905TU KA7906TU KA7908TU KA7909TU KA7912TU KA7915TU KA7918TU KA7924TU KA7912ATU KA7915ATU LM7905CT LM7908CT LM7909CT LM7910CT LM7912CT LM7915CT LM7918CT
Output Voltage Tolerance
±4%
±2%
±4%
© 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1
1
1. GND 2. Input 3. Output
Package
Packing Method
Operating Temperature
TO-220 (Dual Gauge)
Rail
0 to +125°C
TO-220 (Single Gauge)
www.fairchildsemi.com
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Block Diagram
GND
VOLTAGE REFERENCE
I1
R1
R2
OOuutptut +
Q1
-
Q2 PROTECTION I2 CIRCUITRY
Rsc
In Input
Figure 1. Block Diagram
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.
Symbol
Parameter
Value
Unit
VI RθJC RθJA TOPR TSTG
Input Voltage Thermal Resistance, Junction-Case(1) Thermal Resistance, Junction-Air(1, 2)
Operating Temperature Range
Storage Temperature Range
-35 5 65 0 to +125 - 65 to +150
V °C/W °C/W
°C °C
Notes: 1. Thermal resistance test board, size: 76.2 mm x 114.3 mm x 1.6 mm(1S0P), JEDEC standard:
JESD51-3, JESD51-7. 2. Assume no ambient airflow.
© 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1
2
www.fairchildsemi.com
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7905 / LM7905)
(VI = -10 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
VO
ΔVO
ΔVO IQ ΔIQ
ΔVo/ΔT VN RR VD ISC IPK
Output Voltage
Line Regulation(3)
Load Regulation(3)
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short-Circuit Current Peak Current
TJ = +25°C
IO = 5 mA to 1 A, PO ≤ 15 W, VI = -7 V to -20 V
TJ = +25°C
VI = -7 V to -25 V VI = -8 V to -12 V
TJ = +25°C, IO = 5 mA to 1.5 A
TJ = +25°C, IO = 250 mA to 750 mA
TJ = +25°C
IO = 5 mA to 1 A
VI = -8 V to -25 V
IO = 5 mA
f = 10 Hz to 100 kHz, TA = +25°C f = 120 Hz, ΔVI = 10 V TJ = +25°C, IO = 1 A TJ = +25°C, VI = -35 V TJ = +25°C
-4.80 -4.75
54
-5.00
-5.00
35 8 10 3 3 0.05 0.10
-0.4
40 60 2 300 2.2
-5.20 -5.25
V
100 50 100 50 6 0.50 0.80
mV
mV mA mA
mV/°C
μV dB V mA A
Note:
3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1
3
www.fairchildsemi.com
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7906)
(VI = -11 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
VO
ΔVO
ΔVO IQ ΔIQ
ΔVo/ΔT VN RR VD ISC IPK
Output Voltage
Line Regulation(4)
Load Regulation(4)
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short-Circuit Current Peak Current
TJ = +25°C
IO = 5 mA to 1 A, PO ≤ 15 W, VI = -9 V to -21 V
TJ = +25°C
VI = -8 V to -25 V VI = -9 V to -13 V
TJ = +25°C, IO = 5 mA to 1.5 A
TJ = +25°C, IO = 250 mA to 750 mA
TJ = +25°C
IO = 5 mA to 1 A
VI = -8 V to -25 V
IO = 5 mA
f = 10 Hz to 100 kHz, TA =+25°C f = 120 Hz, ΔVI = 10 V TJ = +25°C, IO = 1 A TJ = +25°C, VI = -35 V TJ = +25°C
-5.75 -5.70
54
-6.00
-6.00
10 5 10 3 3 0.05 0.10
-0.5
130 60 2 300 2.2
-6.25 -6.30
V
120 60 120 60 6 0.50 1.30
mV
mV mA mA
mV/°C
μV dB V mA A
Note:
4. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1
4
www.fair.