Data Sheet

ManualsBrandsSTMicroelectronics ManualsActive ComponentsVoltage regulator - linear, type 79 L7905CV Negative Adjustable -5 V 1.5 A TO 220 3

1/18August 2005

■ 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

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.

L7900

SERIES

NEGATIVE VOLTAGE REGULATORS

Figure 1: Schematic Diagram

TO-220

PAK

TO-220FP

TO-3

Rev. 10

Summary of content (18 pages)

PAGE 1
L7900 SERIES NEGATIVE VOLTAGE REGULATORS ■ 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 D2PAK packages and several fixed output voltages, making it useful in a wide range of applications.
PAGE 2
L7900 SERIES Table 1: Absolute Maximum Ratings Symbol VI Parameter DC Input Voltage Value for VO = 5 to 18V -35 for VO = 20, 24V -40 Unit V Output Current Internally Limited Ptot Power Dissipation Internally Limited Tstg Storage Temperature Range Top Operating Junction Temperature Range IO -65 to 150 °C 0 to 150 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
PAGE 3
L7900 SERIES Table 3: Order Codes TYPE L7905C L7906C L7908C L7912C L7915C L7918C L7920C L7924C TO-220 (A Type) TO-220 (C Type) TO-220 (E Type) D2PAK (A Type) (#) D2PAK (C Type) (T & R) TO-220FP OUTPUT VOLTAGE TO-3 L7905CV L7905C-V L7905CV1 L7905CD2T L7905C-D2TR L7905CP L7905CT (*) L7906CV L7906CD2T L7906CP (*) L7906CT (*) L7908CV L7908CD2T L7908CP (*) L7908CT (*) L7912CV L7912C-V L7912CV1 L7912CD2T L7912CP L7912CT (*) L7915CV L7915CD2T L7915CP L7915CT L7918CV L7918CD2T(*) L7918CP (*) L7918CT (*) L7
PAGE 4
L7900 SERIES Table 5: Electrical Characteristics Of L7906C (refer to the test circuits, TJ = 0 to 125°C, VI = -11V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. -5.75 -6 -6.25 V -5.7 -6 -6.3 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -9.5 to -21.5 V ∆VO(*) Line Regulation VI = -8.5 to -25 V TJ = 25°C 120 VI = -9 to -15 V TJ = 25°C 60 IO = 5 mA to 1.
PAGE 5
L7900 SERIES Table 7: Electrical Characteristics Of L7912C (refer to the test circuits, TJ = 0 to 125°C, VI = -19V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. Unit -11.5 -12 -12.5 V -11.4 -12 -12.6 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -15.5 to -27 V ∆VO(*) Line Regulation VI = -14.5 to -30 V TJ = 25°C 240 VI = -16 to -22 V TJ = 25°C 120 IO = 5 mA to 1.
PAGE 6
L7900 SERIES Table 9: Electrical Characteristics Of L7918C (refer to the test circuits, TJ = 0 to 125°C, VI = -27V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -22 to -33 V ∆VO(*) Line Regulation VI = -21 to -33 V VI = -24 to -30 V IO = 5 mA to 1.5 A TJ = 25°C 360 IO = 250 to 750 mA TJ = 25°C 180 ∆VO(*) Id ∆Id Load Regulation -18 -18.
PAGE 7
L7900 SERIES Table 11: Electrical Characteristics Of L7924C (refer to the test circuits, TJ = 0 to 125°C, VI = -33V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. Unit -23 -24 -24.5 V -22.8 -24 -25.2 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -27 to -38 V ∆VO(*) Line Regulation VI = -27 to -38 V TJ = 25°C 480 VI = -30 to -36 V TJ = 25°C 240 IO = 5 mA to 1.
PAGE 8
L7900 SERIES Figure 5: Split Power Supply (± 15V/1A) Against potential latch-up problems. Figure 6: Circuit for Increasing Output Voltage R1 + R2 VO = Vxx  R2 Vxx  > 3Id R2 C3 Optional for improved transient response and ripple rejection.
PAGE 9
L7900 SERIES TO-3 MECHANICAL DATA mm. DIM. MIN. A inch TYP MAX. MIN. TYP. 11.85 B 0.96 MAX. 0.466 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 R 3.88 1.031 4.09 U 0.152 39.5 V 1.555 30.10 1.185 A P D C O N B V E G U 0.
PAGE 10
L7900 SERIES TO-220 (A TYPE) MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. A 4.40 4.60 0.173 TYP. MAX. 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 L30 0.645 28.9 1.
PAGE 11
L7900 SERIES TO-220 (C TYPE) MECHANICAL DATA DIM. mm. MIN. MAX. MIN. 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 D E TYP inch 15.70 9.80 TYP. 0.024 0.618 10.20 0.386 0.402 e 2.54 0.100 e1 5.08 0.200 F 1.25 H1 MAX. 1.39 0.049 6.5 0.055 0.256 J1 2.20 2.60 0.087 0.202 L 12.88 13.28 0.507 0.523 L1 L20 3 15.70 L30 0.118 16.1 0.618 28.9 0.634 1.138 φP 3.50 3.70 0.138 0.146 Q 2.70 2.90 0.106 0.
PAGE 12
L7900 SERIES TO-220 (E TYPE) MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. A 4.47 4.67 0.176 TYP. 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 MAX. 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.
PAGE 13
L7900 SERIES TO-220FP MECHANICAL DATA mm. DIM. MIN. TYP inch MAX. MIN. TYP. MAX. 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 L2 L3 16 0.409 0.630 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.
PAGE 14
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 8 9.35 0.352 0.368 E 10 10.4 E1 8.5 D1 e 0.315 0.393 0.409 0.335 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.
PAGE 15
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 0.035 b 0.70 0.90 0.028 b2 1.17 1.37 0.046 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 9.2 9.4 0.354 0.362 0.370 D 9.0 D1 7.5 E 9.8 E1 7.5 0.054 0.295 10.2 0.386 0.402 0.295 e 2.54 e1 5.08 0.200 H 15 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.
PAGE 16
L7900 SERIES Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA mm. inch DIM. MIN. TYP A MIN. TYP. 180 13.0 13.2 MAX. 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 16/18 MAX. 0.504 0.512 14.4 0.519 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.
PAGE 17
L7900 SERIES Table 12: Revision History Date Revision 22-Jun-2004 31-Aug-2005 9 10 Description of Changes Ordering Codes updated Table 3, pag. 3. Add new order codes (TO-220 E Type) on Table 3, pag. 3.
PAGE 18
L7900 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice.