LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
3-Terminal
Negative voltage Regulators
DESCRIPTION
These voltage regulators are designed as fixed negative voltage regulators for a
wide variety of applications including local, on-card regulation. Although designed
primarily as a fixed voltage regulator, these devices can be used with external
components to obtain adjustable voltages and currents.
FEATURES
Output current in excess of 1.0A
No external components required
Output Voltages (-5V, -6V, -8V, -9V, -10V, -12V, -15V, -18V)
Internal Thermal shutdown and SOA protection
Output voltage offered in 4% Tolerance
Pb-Free Packages are available
High ESD Level (HBM>8000V, MM>800V)
TYPICAL APPLICATION
The input voltage must remain typically
2.0V above the output voltage even during
the low point on the ripple voltage.
* CI is required if regulator is located
an appreciable Distance from power filter.
* CO improves transient response.
Values of 1.0 µF could cause instability.
Input
2
Output
3
1
CI CO
2.2uF
1.0uF
1.0A ,Negative voltage Regulators
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Maximum Ratings (TA=25 °C, unless otherwise noted)
Rating
Symbol
Value
Unit
TO-220F TO-220 TO-252
Input Voltage
-5V ~ -18V
VI
-35 V
-24V
-40
Power Dissipation
Thermal Resistance of Junction to Ambient
Thermal Resistance of Junction to Case
Storage Temperature
Junction Temperature
Operating Temperature
PD
RθJA
RθJC
TSTG
TJ
TOPR
22
65 65
55
-55 ~ 125
+ 150
-40 ~ 125
1.3
92
5
W
°C/W
°C/W
°C
°C
°C
Stresses exceeding Maximum ratings may damage the device. Maximum ratings are stress ratings.
Functional operation above the recommended operating conditions is not implied.
Extended exposure to stresses the above the recommended operating conditions may affect
device reliability.
PD(max) = (TJ(max)–TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in
excessive die temperature, and the regulator will go into thermal shutdown.
Representative Schematic of LM79XX
R15 R18
R21
Q22
R22
D1 R1 Q17
Q19 Q21
Q24
C1
D2 + Q20
Q18 D5 Q23
GND
R13 R12
D3 R14
Q2 Q3
R17 R19 R20
R0
Q4
Q7
Q6
Q5
R2
R22A
Q12 Q13
Q26 Q27
R10
D4
R11
OUTPUT
Q8
Q9
R3
C2 C3
++
Q10 Q11
R4 R5
Q14
Q15
R9
R6
R7
Q16
R8
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INPUT
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Ordering Information
Part No
Package
Packing
LM79XXRTRL TO-252
Reel &
Tape
LM79XXFTL TO-220F Tube
LM79XXTL
TO-220
Tube
Finish Halogen
Packing
Unit
Remark
Sn Free
2,500ea
XX : Output
Voltage option *
Sn Free
5,000ea
XX : Output
Voltage option *
Sn Free
5,000ea
XX : Output
Voltage option *
* Voltage option (XX) : -5V(05), -6V(06), -8V(08), -9V(09), -10V(10), -12V(12), -15V(15), -18V(18),-24V(24)
Package Outline
PIN INFO. 1. GND PIN 2. INPUT PIN 3. OUTPUT PIN
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Electrical characteristics
*Note 1 Line and Load regulation are specified at constant junction temperature. Changes of VO due to
heating effects must be taken into account separately. Pulse testing with low duty circle is used.
Electrical characteristics (LM7905)
(TJ = 0 to 125 °C, VIN=10V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-4.8
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-7.0V ≥ VIN ≥ -20.0V
-4.75
Line regulation (TJ=25°C)
Regline -7.0V ≥ VIN ≥ -25.0V
(Note 1)
-8.0V ≥ VIN ≥ -12.0V
Load regulation (TJ=25°C)
(Note 1)
Regload 5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
Quiescent current
IQ
TJ=25°C
Quiescent current change
Δ IQ
5.0 mA ≤ IO ≤ 1.0 A
-8.0V ≥ VIN ≥ -25.0V
Output Voltage Drift
ΔVO/ΔT IO = 5.0 mA
Output noise voltage
VN 10 Hz ≤ f ≤ 100 KHz, TA=25°C
Ripple rejection
RR -8.0V ≥ VIN ≥ -18.0V, f=120 Hz
54
Dropout voltage
VDROP IO = 1.0A, TJ=25°C
Short circuit current limit
ISC VIN = -35V, TA=25°C
Peak output current
IPK TJ=25°C
Electrical characteristics (LM7906)
(TJ = 0 to 125 °C, VIN=11V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-5.75
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-8.0V ≥ VIN ≥ -21.0V
-5.7
Line regulation (TJ=25°C)
Regline -8.0V ≥ VIN ≥ -25.0V
(Note 1)
-9.0V ≥ VIN ≥ -13.0V
Load regulation (TJ=25°C)
Regload 5.0 mA ≤ IO ≤ 1.5A
(Note 1)
250 mA ≤ IO ≤ 750 mA
Quiescent current
IQ
TJ=25°C
Quiescent current change
Δ IQ
5.0 mA ≤ IO ≤ 1.0 A
-8.0V ≥ VIN ≥ -25.0V
Output Voltage Drift
ΔVO/ΔT IO = 5.0 mA
Output noise voltage
VN 10 Hz ≤ f ≤ 100 KHz, TA=25°C
Ripple rejection
RR -9.0V ≥ VIN ≥ -19.0V, f=120 Hz
54
Dropout voltage
VDROP IO = 1.0A, TJ=25°C
Short circuit current limit
ISC VIN = -35V, TA=25°C
Peak output current
IPK TJ=25°C
Typ
-5.0
-5.0
-0.4
40
60
1.3
500
2.2
Typ
-6.0
-6.0
-0.5
130
60
1.3
500
2.2
Max
-5.2
-5.25
100
50
100
50
6.0
0.5
0.8
Unit
V
mV
mV
mA
mA
mV/°C
µV/VO
dB
V
mA
A
Max
-6.25
-6.3
120
60
120
60
6.0
0.5
1.3
Unit
V
mV
mV
mA
mA
mV/°C
µV/VO
dB
V
mA
A
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Electrical characteristics (LM7908)
(TJ = 0 to 125 °C, VIN=14V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-7.7
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-10.5V ≥ VIN ≥ -23.0V
-7.6
Typ Max
-8.0 -8.3
-8.0 -8.4
Unit
V
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-10.5V ≥ VIN ≥ -25.0V
-11.5V ≥ VIN ≥ -17.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-10.5V ≥ VIN ≥ -25.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-11.5V ≥VIN ≥ -21.5V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
160
mV
80
160
mV
80
6.0 mA
0.5
mA
1.0
-0.6 mV/°C
175 µV/VO
54 60
dB
1.3 V
500 mA
2.2 A
Electrical characteristics (LM7909)
(TJ = 0 to 125 °C, VIN=15V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min Typ Max
TJ=25°C
-8.65 -9.0 -9.35
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-11.5V ≥ VIN ≥ -24.0V
-8.6 -9.0 -9.4
Unit
V
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-11.5V ≥ VIN ≥ -25.0V
-12.0V ≥ VIN ≥ -17.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-11.5V ≥ VIN ≥ -26.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-13.0V ≥VIN ≥ -23.0V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
180
mV
90
180
mV
90
6.0 mA
0.5
mA
1.0
-0.6 mV/°C
175 µV/VO
54 60
dB
1.3 V
500 mA
2.2 A
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Electrical characteristics (LM7910)
(TJ = 0 to 125 °C, VIN=16V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-9.6
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-12.5V ≥ VIN ≥ -25.0V
-9.5
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-12.5V ≥ VIN ≥ -25.0V
-13.0V ≥ VIN ≥ -25.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-12.5V ≥ VIN ≥ -29.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-13.0V ≥VIN ≥ -23.0V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
54
Typ
-10.0
Max
-10.4
-10.0 -10.5
Unit
V
200
mV
100
200
mV
100
6.0 mA
0.5
mA
1.0
-1.0 mV/°C
280 µV/VO
60 dB
2.0 V
500 mA
2.2 A
Electrical characteristics (LM7912)
(TJ = 0 to 125 °C, VIN=19V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-11.5
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-14.5V ≥ VIN ≥ -27.0V
-11.4
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-14.5V ≥ VIN ≥ -30.0V
-16.0V ≥ VIN ≥ -22.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-14.5V ≥ VIN ≥ -30.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-15.0V ≥VIN ≥ -25.0V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
54
Typ
-12.0
-12.0
-0.8
200
60
1.3
500
2.2
Max
-12.5
-12.6
240
120
240
120
6.0
0.5
1.0
Unit
V
mV
mV
mA
mA
mV/°C
µV/VO
dB
V
mA
A
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3-Terminal Negative voltage Regulators

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LM79XX
Electrical characteristics (LM7915)
(TJ = 0 to 125 °C, VIN=23V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-14.4
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-17.5V ≥ VIN ≥ -30.0V
-14.25
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-17.5V ≥ VIN ≥ -30.0V
-20.0V ≥ VIN ≥ -26.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-17.5V ≥ VIN ≥ -30.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-18.5V ≥VIN ≥ -28.5V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
54
Typ
-15.0
-15.0
-0.9
250
60
1.3
500
2.2
Max
-15.6
-15.75
300
150
300
150
6.0
0.5
1.0
Unit
V
mV
mV
mA
mA
mV/°C
µV/VO
dB
V
mA
A
Electrical characteristics (LM7918)
(TJ = 0 to 125 °C, VIN=27V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-17.3
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-21.0V ≥ VIN ≥ -33.0V
-17.1
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-21.0V ≥ VIN ≥ -33.0V
-24.0V ≥ VIN ≥ -30.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-21.0V ≥ VIN ≥ -33.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-22.0V ≥VIN ≥ -32.0V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
54
Typ
-18.0
-18.0
-1.0
300
60
1.3
500
2.2
Max
-18.7
-18.9
360
180
360
180
6.0
0.5
1.0
Unit
V
mV
mV
mA
mA
mV/°C
µV/VO
dB
V
mA
A
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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LM79XX
Electrical characteristics (LM7924)
(TJ = 0 to 125 °C, VIN=33V, IO=500 mA, CI=2.2 µF, CO=1.0 µF, unless otherwise noted)
Characteristic
Symbol
Condition
Min
TJ=25°C
-23.0
Output voltage
VO 5.0mA ≤ IO ≤ 1.0A, PD≤15W
-27.0V ≥ VIN ≥ -38.0V
-22.8
Line regulation (TJ=25°C)
(Note 1)
Load regulation (TJ=25°C)
(Note 1)
Quiescent current
Quiescent current change
Output Voltage Drift
Output noise voltage
Ripple rejection
Dropout voltage
Short circuit current limit
Peak output current
Regline
Regload
IQ
Δ IQ
ΔVO/ΔT
VN
RR
VDROP
ISC
IPK
-27.0V ≥ VIN ≥ -38.0V
-30.0V ≥ VIN ≥ -36.0V
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
TJ=25°C
5.0 mA ≤ IO ≤ 1.0 A
-27.0V ≥ VIN ≥ -38.0V
IO = 5.0 mA
10 Hz ≤ f ≤ 100 KHz, TA=25°C
-28.0V ≥VIN ≥ -38.0V, f=120 Hz
IO = 1.0A, TJ=25°C
VIN = -35V, TA=25°C
TJ=25°C
54
Typ
-24.0
Max
-25.0
-24.0 -25.25
Unit
V
480
mV
180
480
mV
240
6.0 mA
0.5
mA
1.0
-1.0 mV/°C
400 µV/VO
60 dB
1.3 V
500 mA
2.2 A
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3-Terminal Negative voltage Regulators

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Typical Performance Characteristics
LM79XX
Figure 1. Quiescent Current
Figure 2. Output Peak Current
Figure 3. Output Voltage
Figure 4. Dropout Voltage
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3-Terminal Negative voltage Regulators

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Typical Applications
LM79XX
-20V
Input
CI
1 µF
2 NLMA7990055
3
1
CO
1µF
R VO 10V
IO = 5.0 / R + IQ
Figure 4-1 Constant Current Regulator
+20V
Input
CI
0.33µF
1
NLMA78155
2
1.0 µF
3
CO
1 µF
+15V
Output
-20V
Input
1.0 µF
1.0 µF
1 -15V
2 NLAM77991155 3
Output
Figure 4-2 Operation Amplifier Supply (±15V @ 1.0A)
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3-Terminal Negative voltage Regulators

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Package Dimensions
TO-220 Dual Gauge
LM79XX
TO-220F
.
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3-Terminal Negative voltage Regulators

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Package Dimensions
TO-252
LM79XX
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LM7909 (AP Semiconductor)
3-Terminal Negative voltage Regulators

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Revision History
No Date
1 2015-01-30
2 2015-06-22
3 2016-11-07
Contents
Initial Brief Datasheet Release
ESD Level Update
Power Dissipation Update
LM79XX
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3-Terminal Negative voltage Regulators

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LM79XX
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products or specifications herein. AP Semiconductor co, Ltd does not assume any responsibility
for use of any its products for any particular purpose, nor does AP Semiconductor co, Ltd
assume any liability arising out of the application or use of any its products or circuits. AP
Semiconductor co, Ltd does not convey any license under its patent rights or other rights nor the
rights of others.
AP Semiconductor Co., Ltd
Contact. Tel 82.70.4693.2299 FAX 82.70.4000.4009
E-mail: sales@apsemi.com
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LM7909.pdf
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