L7900AC STMICROELECTRONICS [STMicroelectronics], L7900AC Datasheet

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L7900AC

Manufacturer Part Number
L7900AC
Description
2% NEGATIVE VOLTAGE REGULATORS
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
DESCRIPTION
The L7900AC series of three-terminal negative
regulators is available in TO-220 and D
packages and several fixed output voltages.
These regulators can provide local on-card
regulation, eliminating the distribution problems
associated
furthermore, having the same voltage option as
the L7800A positive standard series, they are
particularly suited for split power supplies. In
addition, the -5.2V is also available for ECL
system.
they can deliver over 1.5A output current.
Although designed primarily as fixed voltage
regulators, these devices can be used with
external
voltages and currents.
SCHEMATIC DIAGRAM
November 1999
OUTPUT CURRENT UP TO 1.5 A
OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -12;
-15; -18; -20; -22; -24V
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
OUTPUT TRANSITION SOA PROTECTION
If adequate heat sinking is provided,
components
with
single
to
2% NEGATIVE VOLTAGE REGULATORS
obtain
point
regulation;
adjustable
2
PAK
TO-220
D
2
PAK
1
L7900AC
3
SERIES
1/11

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L7900AC Summary of contents

Page 1

... THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSITION SOA PROTECTION DESCRIPTION The L7900AC series of three-terminal negative regulators is available in TO-220 and D packages and several fixed output voltages. These regulators can provide local on-card regulation, eliminating the distribution problems associated ...

Page 2

... L7900AC ABSOLUTE MAXIMUM RATINGS Symbol V DC Input Voltage (for -18V (for V = -20, -24V Output Current o P Power Dissipation tot T Operating Junction Temperature Range op T Storage Temperature Range st g THERMAL DATA Symbol Parameter R Thermal Resistance Junction-case thj Thermal Resistance Junction-ambient ...

Page 3

... B = 10Hz to 100KHz 120 100 due to heating effects must be taken into account o L7900AC 125 C, j Min. Typ. Max. Unit -4.9 -5 -5.1 V -4.8 -5 -5.2 V 100 100 0 ...

Page 4

... L7900AC ELECTRICAL CHARACTERISTICS FOR L7906A (refer to the test circuits -11V 500 mA 2 Symbol Parameter V Output Voltage o V Output Voltage Line Regulation Load Regulation o I Quiescent Current d I Quiescent Current Change d I Quiescent Current Change d V Output Voltage Drift ...

Page 5

... B = 10Hz to 100KHz 120 100 due to heating effects must be taken into account o L7900AC 125 C, j Min. Typ. Max. Unit -12 -12.25 V -11.5 -12 -12.5 V 240 mV 120 mV 240 mV 120 0.5 mA ...

Page 6

... L7900AC ELECTRICAL CHARACTERISTICS FOR L7918A (refer to the test circuits -27V 500 mA 2 Symbol Parameter V Output Voltage o V Output Voltage Line Regulation Load Regulation o I Quiescent Current d I Quiescent Current Change d I Quiescent Current Change d V Output Voltage Drift ...

Page 7

... B = 10Hz to 100KHz 120 100 due to heating effects must be taken into account o L7900AC 125 C, j Min. Typ. Max. Unit -21.5 -22 -22.4 V -21.1 -22 -22.8 V 440 mV 220 mV 440 mV 220 0.5 mA ...

Page 8

... L7900AC APPLICATION INFORMATION Figure 1 : Fixed Output Regulator. Notes : 1. To specify an output voltage, substitute voltage value for ”XX”. 2. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolitics are used, at least ten times value should be selected required if regulator is located an 1 appreciable distance from power supply filter ...

Page 9

... L2 16.2 L3 26.3 26.7 L5 2 Dia. 3.65 inch MAX. MIN. TYP. 4.8 1.37 2.8 0.094 1.35 0.047 0.55 0.014 0.94 0.024 1.4 0.045 5.21 0.195 0.200 10.4 10.4 0.396 0.638 27.1 1.035 1.051 3 0.102 15.8 0.594 6.6 0.236 3.85 0.144 L7900AC MAX. 0.189 0.054 0.110 0.053 0.022 0.037 0.055 0.205 0.409 0.409 1.067 0.118 0.622 0.260 0.152 P011D 9/11 ...

Page 10

... L7900AC TO-263 (D mm DIM. MIN. TYP. A 4.4 A1 2.49 B 0.7 B2 1.14 C 0.45 C2 1. 1. DETAIL”A” 10/11 2 PAK) MECHANICAL DATA MAX. MIN. 4.6 0.173 2.69 0.098 0.93 0.027 1.7 0.044 0.6 0.017 1.36 0.048 9.35 0.352 10.4 0.393 5.28 0.192 15.85 0.590 1.4 0.050 1.75 0.055 D C DETAIL”A” ...

Page 11

... The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . L7900AC 11/11 ...

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