ST MICROELECTRONICS L7905CV STM Datasheet

L7900

SERIES

NEG A TIVE VOL TAGE REG U L A TORS

■ OUTPUT CURRENT UP TO 1.5A

■ OUTPUT VOLTAGES OF -5; -6; -8; -12; -15;

-18; -20; -24V

■ THERMAL OVERLOAD PROTECTION

■ SHORT CIRCUIT PROTECTION

■ OUTPUT TRANSITION SOA PROTECTION

DESCRIPTION

The L7900 series of three-terminal negative
regulators is available in TO-220, TO-220FP,
TO-3 and D

2

PAK packages and several fixed
output voltages, making it useful in a wide range of
applications. These regulators can provide local
on-card regulation, eliminating the distribution
problems associated with single point regulation;
furthermore, having the same voltage option as
the L7800 positive standard series, they are
particularly suited for split power supplies. If
adequate heat sinking is provided, they can
deliver over 1.5A output current.

Although designed primarily as fixed voltage
regulators, these devices can be used with
external components to obtain adjustable voltages
and currents.

TO-220

D2PAK

TO-220FP

TO-3

Figure 1: Sche matic Diagram

Rev. 10

1/18August 2005

L7900 SERIES

Table 1: Absolute Maximum Ratings

Symbol Parameter Value Unit

V

I
P
T
T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.

DC Input Voltage for VO = 5 to 18V

I

Output Current

O

Power Dissipation

tot

Storage Temperature Range

stg

Operating Junction Temperature Range

op

for V

= 20, 24V

O

Table 2: Thermal Data

-35

-40
Internally Limited
Internally Limited

-65 to 150 °C
0 to 150 °C

V

Symbol Parameter

R

thj-case

R

thj-amb

Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max

Figure 2: Connection Diagram (top view)

TO-220 TO-220FP

2

PAK

D2PAK

TO-220 TO-220FP TO-3 Unit

3354°C/W

62.5506035°C/W

TO-3D

2/18

L7900 SERIES

Table 3: Order Codes

2

PAK

TYPE

TO-220

(A Type)

TO-220

(C Type)

TO-220

(E Type)

2

PAK

D

(A Type) (#)

L7905C L7905CV L7905C-V L7905CV1 L7905CD2T L7905C-D2TR L7905CP L7905CT (*) -5 V
L7906C L7906CV L7906CD2T L7906CP (*) L7906CT (*) -6 V
L7908C L7908CV L7908CD2T L7908CP (*) L7908CT (*) -8 V
L7912C L7912CV L7912C-V L7912CV1 L7912CD2T L7912CP L7912CT (*) -12 V
L7915C L7915CV L7915CD2T L7915CP L7915CT -15 V
L7918C L7918CV L7918CD2T(*) L7918CP (*) L7918CT (*) -18 V
L7920C L7920CV L7920CD2T(*) L7920CP (*) L7920CT (*) -20 V
L7924C L7924CV L7924CD2T(*) L7924CP (*) L7924CT -24 V

(#) Available in Tape & Reel with the suffix "-TR".
(*) Avai l abl e on Requ est .

Figure 3: Test Circuit

D

(C Type)

(T & R)

TO-220FP TO-3

OUTPUT

VOLTAGE

Table 4: Electrical Characteristics Of L7905C (refer to the test circuits, T

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

= 0 to 125°C, VI = -10V,

J

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Output Voltage TJ = 25°C -4.8 -5 -5.2 V

V

O

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

V

O

(*) Line Regulation VI = -7 to -25 V TJ = 25°C 100 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 100 mV

∆V

O

I

Quiescent Current TJ = 25°C 3 mA

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -0.4 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= 8 to 20 V

I

V

= -8 to -12 V TJ = 25°C 50

I

= 250 to 750 mA TJ = 25°C 50

I

O

= -8 to -25 V 1.3

V

I

= 25°C 100 µV

J

= 10 V f = 120Hz 54 60 dB

I

-4.75-5-5.25 V

1.4 V

mV

Short Circuit Current 2.1 A

I

sc

(*) 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 cycle is used.

3/18

L7900 SERIES

Table 5: Electrical Characteristics Of L7906C (refer to the test circuits, TJ = 0 to 125°C, VI = -11V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -5.75 -6 -6.25 V

O

V

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

O

(*) Line Regulation VI = -8.5 to -25 V TJ = 25°C 120 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 120 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -0.6 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -9.5 to -21.5 V

I

= -9 to -15 V TJ = 25°C 60

V

I

I

= 250 to 750 mA TJ = 25°C 60

O

= -9.5 to -25 V 1.3

V

I

= 25°C 144 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 2 A

I

sc

(*) 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 cycle is used.

-5.7 -6 -6.3 V

1.4 V

Table 6: Electrical Characteristics Of L7908C (refer to the test circuits, TJ = 0 to 125°C, VI = -14V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -7.7 -8 -8.3 V

O

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

V

O

(*) Line Regulation VI = -10.5 to -25 V TJ = 25°C 160 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 160 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -0.6 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -11.5 to -23 V

I

= -11 to -17 V TJ = 25°C 80

V

I

I

= 250 to 750 mA TJ = 25°C 80

O

= -11.5 to -25 V 1

V

I

= 25°C 175 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 1.5 A

I

sc

(*) 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 cycle is used.

-7.6 -8 -8.4 V

1.1 V

4/18

L7900 SERIES

Table 7: Electrical Characteristics Of L7912C (refer to the test circuits, TJ = 0 to 125°C, VI = -19V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -11.5 -12 -12.5 V

O

V

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

O

(*) Line Regulation VI = -14.5 to -30 V TJ = 25°C 240 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 240 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -0.8 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -15.5 to -27 V

I

= -16 to -22 V TJ = 25°C 120

V

I

I

= 250 to 750 mA TJ = 25°C 120

O

= -15 to -30 V 1

V

I

= 25°C 200 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 1.5 A

I

sc

(*) 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 cycle is used.

-11.4 -12 -12.6 V

1.1 V

Table 8: Electrical Characteristics Of L7915C (refer to the test circuits, TJ = 0 to 125°C, VI = -23V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -14.4 -15 -15.6 V

O

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

V

O

(*) Line Regulation VI = -17.5 to -30 V TJ = 25°C 300 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 300 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -0.9 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -18.5 to -30 V

I

= -20 to -26 V TJ = 25°C 150

V

I

I

= 250 to 750 mA TJ = 25°C 150

O

= -18.5 to -30 V 1

V

I

= 25°C 250 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 1.3 A

I

sc

(*) 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 cycle is used.

-14.3 -15 -15.7 V

1.1 V

5/18

L7900 SERIES

Table 9: Electrical Characteristics Of L7918C (refer to the test circuits, TJ = 0 to 125°C, VI = -27V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -17.3 -18 -18.7 V

O

V

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

O

(*) Line Regulation VI = -21 to -33 V TJ = 25°C 360 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 360 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -1 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -22 to -33 V

I

= -24 to -30 V TJ = 25°C 180

V

I

I

= 250 to 750 mA TJ = 25°C 180

O

= -22 to -33 V 1

V

I

= 25°C 300 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 1.1 A

I

sc

(*) 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 cycle is used.

-17.1 -18 -18.9 V

1.1 V

Table 10: Electrical Characteristics Of L7920C (refer to the test circuits, TJ = 0 to 125°C, VI = -29V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -19.2 -20 -20.8 V

O

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

V

O

(*) Line Regulation VI = -23 to -35 V TJ = 25°C 400 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 400 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -1.1 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -24 to -35 V

I

= -26 to -32 V TJ = 25°C 200

V

I

I

= 250 to 750 mA TJ = 25°C 200

O

= -24 to -35 V 1

V

I

= 25°C 350 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 0.9 A

I

sc

(*) 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 cycle is used.

-19 -20 -21 V

1.1 V

6/18

L7900 SERIES

Table 11: Electrical Characteristics Of L7924C (refer to the test circuits, TJ = 0 to 125°C, VI = -33V,

= 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).

I

O

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage TJ = 25°C -23 -24 -24.5 V

O

V

Output Voltage IO = -5 mA to -1 A PO ≤ 15 W

O

(*) Line Regulation VI = -27 to -38 V TJ = 25°C 480 mV

∆V

O

(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 480 mV

∆V

O

Quiescent Current TJ = 25°C 3 mA

I

d

Quiescent Current Change IO = 5 mA to 1 A 0.5 mA

∆I

d

/∆T Output Voltage Drift IO = 5 mA -1 mV/°C

∆V

O

eN Output Noise Voltage B = 10Hz to 100KHz T

SVR Supply Voltage Rejection ∆V

Dropout Voltage IO = 1 A TJ = 25°C ∆VO = 100

V

d

V

= -27 to -38 V

I

= -30 to -36 V TJ = 25°C 240

V

I

I

= 250 to 750 mA TJ = 25°C 240

O

= -27 to -38 V 1

V

I

= 25°C 400 µV

J

= 10 V f = 120Hz 54 60 dB

I

mV

Short Circuit Current 1.1 A

I

sc

(*) 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 cycle is used.

-22.8 -24 -25.2 V

1.1 V

APPLICATIONS INFORMATION
Figure 4: Fixed Output R egulato r

NOTE:

1. To specify an output v ol tage, subst i tu te voltage v alue for "XX".

2. Required for stability. For value given, capacitor mu st b e solid tantalum. If a luminium ele ctrolytics ar e used, at least te n ti mes va lue shoul d
be selec ted. C1 is requ i red if regula tor is located an appreciable distance from power supply f ilt er.

3. To improve transie nt response . If la rge capacito rs are used, a hig h current diod e from input to output (1N4001 or similar) should be intro­duced to protect the d evice from mom entary input short circui t.

7/18

L7900 SERIES

Figure 5: Split Power Supply (± 15V/1A)

Against potential latch-up pr obl ems.

Figure 6: Circuit for Increasing Output Voltage

R
VO = Vxx 

R

C3 Optio nal f or i m proved tra nsient respo nse and ripp l e rej ection.

1 + R2

2

V

xx

 > 3I
R

2

d

Figure 7: High Current Negative Regulator (-5V/4A with 5A current limiting)

8/18

TO-3 MECHANICAL DATA

L7900 SERIES

DIM.

A 11.85 0.466

B 0.96 1.05 1.10 0.037 0.041 0.043

C 1.70 0.066

D 8.7 0.342

E 20.0 0.787

G 10.9 0.429

N 16.9 0.665

P 26.2 1.031

R 3.88 4.09 0.152 0.161

U 39.5 1.555

V 30.10 1.185

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

P

A

G

U

V

N

O

B

D

C

E

R

P003C/C

9/18

L7900 SERIES

TO-220 (A TYPE) MECHANICAL DATA

DIM.

A 4.40 4.60 0.173 0.181
b 0.61 0.88 0.024 0.034

b1 1.15 1.70 0.045 0.067

c 0.49 0.70 0.019 0.027
D 15.25 15.75 0.600 0.620
E 10.0 10.40 0.393 0.409
e 2.4 2.7 0.094 0.106

e1 4.95 5.15 0.194 0.203

F 1.23 1.32 0.048 0.051

H1 6.2 6.6 0.244 0.260

J1 2.40 2.72 0.094 0.107

L 13.0 14.0 0.511 0.551

L1 3.5 3.93 0.137 0.154
L20 16.4 0.645
L30 28.9 1.138

φP 3.75 3.85 0.147 0.151

Q 2.65 2.95 0.104 0.116

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

10/18

0015988/N

TO-220 (C TYPE) MECHANICAL DATA

L7900 SERIES

DIM.

A 4.30 4.70 0.169 0.185

b 0.70 0.90 0.028 0.035

b1 1.42 1.62 0.056 0.064

c 0.45 0.60 0.018 0.024
D 15.70 0.618
E 9.80 10.20 0.386 0.402

e 2.54 0.100

e1 5.08 0.200

F 1.25 1.39 0.049 0.055

H1 6.5 0.256

J1 2.20 2.60 0.087 0.202

L 12.88 13.28 0.507 0.523

L1 3 0.118
L20 15.70 16.1 0.618 0.634
L30 28.9 1.138

φP 3.50 3.70 0.138 0.146

Q 2.70 2.90 0.106 0.114

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

0015988/N

11/18

L7900 SERIES

TO-220 (E TYPE) MECHANICAL DATA

DIM.

A 4.47 4.67 0.176 0.184

b 0.70 0.91 0.028 0.036

b1 1.17 1.37 0.046 0.054

c 0.31 0.53 0.012 0.021
D 14.60 15.70 0.575 0.618
E 9.96 10.36 0.392 0.408

e 2.54 0.100

e1 5.08 0.200

F 1.17 1.37 0.046 0.054

H1 6.1 6.8 0.240 0.268

J1 2.52 2.82 0.099 0.111

L 12.70 13.80 0.500 0.543

L1 3.20 3.96 0.126 0.156

L20 15.21 16.77 0.599 0.660

φP 3.73 3.94 0.147 0.155

Q 2.59 2.89 0.102 0.114

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

12/18

7655923/A

TO-220FP MECHANICAL DATA

L7900 SERIES

DIM.

A 4.40 4.60 0.173 0.181
B 2.5 2.7 0.098 0.106
D 2.5 2.75 0.098 0.108
E 0.45 0.70 0.017 0.027
F 0.75 1 0.030 0.039

F1 1.15 1.50 0.045 0.059
F2 1.15 1.50 0.045 0.059

G 4.95 5.2 0.194 0.204

G1 2.4 2.7 0.094 0.106

H 10.0 10.40 0.393 0.409

L2 16 0.630
L3 28.6 30.6 1.126 1.204
L4 9.8 10.6 0.385 0.417
L5 2.9 3.6 0.114 0.142
L6 15.9 16.4 0.626 0.645
L7 9 9.3 0.354 0.366

DIA. 3 3.2 0.118 0.126

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

7012510A-H

13/18

L7900 SERIES

D2PAK (A TYPE) MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 4.4 4.6 0.173 0.181

A1 0.03 0.23 0.001 0.009

b 0.7 0.93 0.027 0.036

b2 1.14 1.7 0.044 0.067

c 0.45 0.6 0.017 0.023

c2 1.23 1.36 0.048 0.053

D 8.95 9.35 0.352 0.368

D1

E 10 10.4 0.393 0.409

E1 8.5 0.335

e 2.54 0.100

e1 4.88 5.28 0.192 0.208

H 15 15.85 0.590 0.624

J1 2.49 2.69 0.098 0.106

L 2.29 2.79 0.090 0.110

L1 1.27 1.4 0.050 0.055
L2 1.3 1.75 0.051 0.069

R 0.4 0.016

V2 0° 8° 0° 8°

8

0.315

14/18

0079457/J

L7900 SERIES

D2PAK (C TYPE) MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 4.3 4.7 0.169 0.185

A1 0 0.20 0.000 0.008

b 0.70 0.90 0.028 0.035

b2 1.17 1.37 0.046 0.054

c 0.45 0.50 0.6 0.018 0.020 0.024

c2 1.25 1.30 1.40 0.049 0.051 0.055

D 9.0 9.2 9.4 0.354 0.362 0.370

D1 7.5 0.295

E 9.8 10.2 0.386 0.402

E1 7.5 0.295

e 2.54 0.100

e1 5.08 0.200

H 15 15.30 15.60 0.591 0.602 0.614

J1 2.20 2.60 0.087 0.102

L 1.79 2.79 0.070 0.110

L1 1.0 1.4 0.039 0.055
L2 1.2 1.6 0.047 0.063

R 0.3 0.012

V2 0° 3° 0° 3°

0079457/J

15/18

L7900 SERIES

Tape & Reel D

DIM.

A 180 7.086
C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N 60 2.362

T 14.4 0.567

Ao 10.50 10.6 10.70 0.413 0.417 0.421
Bo 15.70 15.80 15.90 0.618 0.622 0.626
Ko 4.80 4.90 5.00 0.189 0.193 0.197
Po 3.9 4.0 4.1 0.153 0.157 0.161

P 11.9 12.0 12.1 0.468 0.472 0.476

2

PAK-P2PAK-D2PAK/A-P2PAK/A MECHANICAL DATA

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

16/18

Table 12: Revision History

Date Revisio n Description of Changes

22-Jun-2004 9 Ordering Codes updated Table 3, pag. 3.

31-Aug-2005 10 Add new order codes (TO-220 E Type) on Table 3, pag. 3.

L7900 SERIES

17/18

L7900 SERIES

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