IL79LXX
1
THREE-TERMINAL LOW CURRENT POSITIVE VOLTAGE REGULATORS
The IL79LXX, A Series negative voltage regulators are inexpensive,
easy-to-use devices suitable for numerous applications requiring up to
100 mA. This series features thermal shutdown and current limiting,
making them remarkably rugged. In most applications, no external
components are required for operation.
The IL79LXX devices are useful for on-card regulation or any other
application where a regulated negative voltage at a modest current
level is needed. These regulators offer substantial advantage over the
common resistor/zener diode approach.
TO-226AA /
TO-92
Pin 1. Output
2.Ground
3.Input
F
EATURES
No External Components Required
• Internal Short Circuit Current Limiting
• Internal Thermal Overload Protection
• Low Cost
• Complementary Positive Regulators
Offered (IL78LXX Series)
• Available in Either ±5% (AC) or±10% (C) Selections
Ño**
0.1µF
Ñin*
0.33µF
Vout
Vin I L 79L XX
Standard application
A common ground is required between the input
and the output voltages. The input voltage must
remaintypically 2.0 V above the output voltage even
during the low point on the input ripple voltage.
*C in is required if regulator is located an
*appreciable distance from power supply filter.
**C O is not needed for stability; however, it does
*improve transient response.
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Input Voltage (-5.0 V)
(-12, -15, -18V)
(-24V)
Vl -30
-35
-40
Vdc
Storage Temperature Range Tstg -65 to +150 °C
Operating Junction Temperature Range TJ +150
°C
IL79LXX
2
IL79L05 ELECTRICAL CHARACTERISTICS
(Vl=-10 V, Io= 40 mA, Cl = 0.33 µF, Co = 0.1 µF, -40°C < TJ < +125°C unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (TJ=+25°C) VO -4.8 -5.0 -5.2 Vdc
Line Regulation
(TJ = +25°C)
-7.0 Vdc ≥ Vi ≥ 20 Vdc
-8.0 Vdc ≥ Vi ≥20 Vdc
Regline
-
-
-
-
150
100
mV
Load Regulation
TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA) 1.0 mA £≤ Io
≤ 40 mA)
Pegload
-
-
-
-
60
30
mV
Output Voltage
-7.0 Vdc ≥Vi≥ -20Vdc,
(Vi=-10 V, 1.0 mA≤Io≤70 mA)
VO
-4.75
-4.75
-
-
-5.25
-5.25
Vdc
Input Bias Current
(TJ = +25°C)
(TJ =+125°C)
IIB
-
-
-
6.0
5.5
mA
Input Bias Current Change
-8.8 Vdc ≥Vi ≥-£20 Vdc)
1.0 mA ≤Io≤ 40 mA
∆IIB
-
-
-
-
1.5
0.1
mA
Output Noise Voltage
(TA=+25°C, 10 Hz≤f≤100 kHz)
Vn - 40 -
µV
Ripple Rejection
(-8.0 Vdc ≥Vi ≥ -18 V,
f= 120 Hz, TJ= +25°C)
RR 41 49 - dB
Dropout Voltage (IO=40 mA, TJ = +25°C) Vi-Vo - 1.7 - Vdc
IL79L12 ELECTRICAL CHARACTERISTICS
(Vi =-19 V, Io =40 mA, Ci = 0.33 µF, Co = 0.1 µF, -40°C < TJ < +125°C, unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) Vo -11.1 -12 -12.9 Vdc
Line Regulation
(TJ = +25°C)
-14.5Vdc ≥Vi ≥ 27Vdc
-16 Vdc ≥Vi ≥ 27 Vdc
Regline
-
-
-
-
250
200
mV
Load Regulation
TJ = +25°C, 1.0 mA ≤ Io ≤ 100 mA
1.0 mA ≤ Io ≤ 40 mA
Pegload
-
-
-
-
100
50
mV
Output Voltage
-14.5Vdc ≥Vi ≥-27Vdc, 1.0mA≤Io≤ 40mA) Vi = -
19V, 1.0mA ≤Io ≤ 70mA)
Vo
-10.8 --
10.8
-
-
-13.2
-13.2
Vdc
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
-16Vdc ≥ Vi ≥ -27Vdc
1.0 mA ≤ Io ≤ 40 mA
∆IIB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(TA = +25°C, 10Hz ≤ f ≤ 100 kHz)
Vn - 80 -
µV
Ripple Rejection
-15V ≥ Vi ≥ -25V, f= 120 Hz, TJ=+25°C)
RR 36 42 - dB
Dropout Voltage
(IO= 40 mA, TJ = +25°C)
Vi-Vo " 1.7 - Vdc
IL79LXX
3
IL79L15 ELECTRICAL CHARACTERISTICS
(Vi = -23 V, Io = 40 mA, Ci = 0.33 µF, Co= 0.1 µF, -40°C < TJ < +125°C), unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) Vo -13.8 -15 -16.2 Vdc
Line Regulation
(TJ = +25°C, Io = 40mA)
-30Vdc ≤Vi ≤ -17.5Vdc
-30Vdc ≤ Vi ≤ -20Vdc
Regline
-
-
-
-
300
250
mV
Load Regulation
(TJ = +25°C, 1.0 mA ≤ Io ≤ 100 mA)
(TJ = +25°C, 1.0 mA ≤£ Io < 40 mA)
Pegload
-
-
-
-
150
75
mV
Output Voltage
(17.5Vdc≤Vi≤ 30Vdc, 1.0 mA≤Io≤ 40 mA) (Vi =
23V, 1.0mA ≤£Io≤ 70 mA)
Vo
-13.5
-13.5
-
-
-16.5
-16.5
Vdc
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(20Vdc ≤ Vi ≤ 30Vdc)
(1.0mA ≤ Io ≤ 40 mA)
∆IIB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(TA = +25°C, 10Hz ≤ f ≤ 100 kHz)
Vn - 90 - nV
Ripple Rejection (IO = 40 mA, f =120 Hz, 18.5V ≤
Vi ≤ 28.5V, TJ = +25°C)
RR 33 39 - dB
Dropout Voltage (TJ = +25°C) Vi-Vo - 1.7 - Vdc
IL79L18 ELECTRICAL CHARACTERISTICS
(Vi = 27 V, Io = 40 mA, Ci = 0.33 µF, Co = 0.1 µF, 40°C < TJ < +125°C, unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) VO -16.6 -18 -19.4 Vdc
Line Regulation
(TJ = +25°C, Io= 40 mA)
-33 Vdc ≤ Vi ≤ -20.7Vdc
-33 Vdc ≤ Vi ≤ -22 Vdc
Regline
-
-
-
-
325
275
mV
Load Regulation
(TJ = +25°C, 1.0 mA ≤ Io ≤ 100 mA)
(TJ = +25°C, 1.0 mA ≤ Io ≤ 40 mA)
Pegload
-
-
-
-
170
85
mV
Output Voltage
(-33Vdc ≤Vi≤-21.4Vdc, 1.0 mA ≤Io≤ 40 mA)
(Vi = -27 V, 1.0mA ≤Io≤ 70 mA)
Vo
-16.2
-16.2
-
-
-19.8
-19.8
Vdc
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(-33Vdc ≤ Vi ≤ -22Vdc)
(1.0mA ≤ Io ≤ 40 mA)
∆IIB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(TΑ=+25°C,10Hz ≤ Io ≤ 100kHz)
Vn - 150 - nV
Ripple Rejection
(f = 120 Hz, -33 V ≤ Vi ≤ -23 V, TJ = +25°C)
RR 32 46 - dB
Dropout Voltage (TJ = +25°C) Vi-Vo - 1.7 - Vdc
IL79LXX
4
IL79L24 ELECTRICAL CHARACTERISTICS
(Vi = 33 V, Io = 40 mA, Ci = 0.33 µF. Co = 0.1 µF,
0°C < TJ < +125°C, unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) VO -22.1 -24 -25.9 Vdc
Line Regulation
(TJ = +25°C, Io = 40 mA)
38 Vdc ≤Vi ≤ 27.5 Vdc
38 Vdc ≤ Vi ≤ 28 Vdc
Regline
-
-
35
30
350
300
mV
Load Regulation
(TJ = +25°C, 1.0 mA ≤ Io £≤ 100 mA)
(TJ = +25°C, 1.0 mA ≤ Io ≤ 40 mA)
Regload
-
-
40
20
200
100
mV
Output Voltage
-38Vdc≤Vi≤£ -28Vdc, 1.0 mA ≤ Io ≤40 mA
Vi= -33Vdc, 1.0 mA ≤ Io ≤70 mA
VO
-21.6
-21.6
-
-
-26.4
-26.4
Vdc
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(-38 Vdc ≤ Vi ≤£ -28 Vdc)
(1.0 mA ≤ Io ≤ 40 mA)
∆IIB
-
-
-
-
1.5
0.2
rnA
Output Noise Voltage
(TА = +25°C, 10Hz ≤ f ≤ 100 kHz)
Vn - 200 - nV
Ripple Rejection (IO = 40 mA, f= 120 Hz, -
35V ≤ Vi ≤ -29V, TJ = +25°C)
RR 30 43 - dB
Dropout Voltage (TJ = +25°C) Vi-Vo - 1.7 - Vdc
