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(R)
L7900AC SERIES
2% NEGATIVE VOLTAGE REGULATORS
s s
s s s
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
3 1
DESCRIPTION The L7900AC series of three-terminal negative regulators is available in TO-220 and D2PAK packages and several fixed output voltages. 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 L7800A positive standard series, they are particularly suited for split power supplies. In addition, the -5.2V is also available for ECL system. 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. SCHEMATIC DIAGRAM
D2PAK
TO-220
June 1998
1/11
L7900AC
ABSOLUTE MAXIMUM RATINGS
Symbol Vi Io Pt ot To p T stg Parameter DC Input Voltage (for VO = -5 to -18V) (for VO = -20, -24V) Output Current Power Dissipation Operating Junction Temperature Range Storage Temperature Range Value -35 -40 Internally limited Internally limited 0 to 125 - 65 to 150
o o
Unit V V
C C
THERMAL DATA
Symbol Parameter Max Max D PAK 3 62.5
2
TO-220 3 50
Unit
o o
R t hj- case Thermal Resistance Junction-case R th j-a mb Thermal Resistance Junction-ambient
C/W C/W
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220 Type L7905AC L7952AC L7906AC L7908AC L7912AC L7915AC L7918AC L7920AC L7922AC L7924AC TO-220 L7905ACV L7952ACV L7906ACV L7908ACV L7912ACV L7915ACV L7918ACV L7920ACV L7922ACV L7924ACV D PAK (*) L7905ACD2T L7952ACD2T L7906ACD2T L7908ACD2T L7912ACD2T L7915ACD2T L7918ACD2T L7920ACD2T L7922ACD2T L7924ACD2T
2
D PAK Output Voltage -5V -5.2V -6V -8V -12V -15V -18V -20V -22V -24V
2
(*) AVAILABLE IN TAPE AND REEL WITH "-TR" SUFFIX
APPLICATION CIRCUIT
2/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7905A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -10V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = 8 to 20 V Vi = -7 to -25 V Vi = -8 to -12 V Po 15 W
o
Min. -4.9 -4.8
Typ. -5 -5
Max. -5.1 -5.2 100 50
Unit V V mV mV mV mV mA mA mA mV/ C V dB V A A
o
Tj = 25 oC o Tj = 25 C Tj = 25 C o Tj = 25 C
o
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 oC Io = 5 to 1000 mA Vi = -8 to -25 V Io = 5 mA
100 50 3 0.5 1.3 -0.4
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
o
100 54 60 1.4 2.1 2.5
Io = 1 A Tj = 25 C VO = 100 mV
ELECTRICAL CHARACTERISTICS FOR L7952A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -10V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = -9 to -21 V Vi = -8 to -25 V Vi = -9 to -13 V Po 15 W
o
Min. -5.1 -5
Typ. -5.2 -5.2
Max. -5.3 -5.4 105 52 105 52 3 0.5 1.3
Unit V V mV mV mV mV mA mA mA mV/ o C V dB V A A
Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 C Io = 5 to 1000 mA Vi = -9 to -25 V Io = 5 mA
o
-0.5
o
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
125 54 60 1.4 2.1 2.5
Io = 1 A Tj = 25 C VO = 100 mV
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.
3/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7906A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -11V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Po 15 W Vi = -9.5 to -21.5 V Vi = -8.5 to -25 V Tj = 25 oC o Vi = -9 to -15 V Tj = 25 C Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 oC Io = 5 to 1000 mA Vi = -9.5 to -25 V Io = 5 mA B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o o o
Min. -5.88 -5.76
Typ. -6 -6
Max. -6.12 -6.24 120 60 120 60 3 0.5 1.3
Unit V V mV mV mV mV mA mA mA mV/ C V dB V A A
o
Tj = 25 C o Tj = 25 C
o
-0.6 144 54 60 1.4 2 2.5
Io = 1 A Tj = 25 C VO = 100 mV
ELECTRICAL CHARACTERISTICS FOR L7908A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -14V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Po 15 W Vi = -11.5 to -23 V Vi = -10.5 to -25 V Tj = 25 oC Vi = -11 to -17 V Tj = 25 oC Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 C Io = 5 to 1000 mA Vi = -11.5 to -25 V Io = 5 mA B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o o o o
Min. -7.84 -7.68
Typ. -8 -8
Max. -8.16 -8.32 160 80 160 80 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ o C V dB V A A
Tj = 25 oC o Tj = 25 C
-0.6 175 54 60 1.1 1.5 2.5
Io = 1 A Tj = 25 C VO = 100 mV
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.
4/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7912A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -19V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Po 15 W Vi = -15.5 to -27 V Vi = -14.5 to -30 V Tj = 25 oC o Vi = -16 to -22 V Tj = 25 C Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 oC Io = 5 to 1000 mA Vi = -15 to -25 V Io = 5 mA B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o o o
Min. -11.75 -11.5
Typ. -12 -12
Max. -12.25 -12.5 240 120 240 120 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ C V dB V A A
o
Tj = 25 C o Tj = 25 C
o
-0.8 200 54 60 1.1 1.5 2.5
Io = 1 A Tj = 25 C VO = 100 mV
ELECTRICAL CHARACTERISTICS FOR L7915A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -23V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Po 15 W Vi = -18.5 to -30 V Vi = -17.5 to -30 V Tj = 25 oC Vi = -20 to -26 V Tj = 25 oC Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 C Io = 5 to 1000 mA Vi = -18.5 to -30 V Io = 5 mA B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o o o o
Min. -14.7 -14.4
Typ. -15 -15
Max. -15.3 -15.6 300 150 300 150 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ o C V dB V A A
Tj = 25 oC o Tj = 25 C
-0.9 250 54 60 1.1 1.3 2.3
Io = 1 A Tj = 25 C VO = 100 mV
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.
5/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7918A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -27V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = -22 to -33 V Vi = -21 to -33 V Vi = -24 to -30 V Po 15 W Tj = 25 oC o Tj = 25 C Tj = 25 C o Tj = 25 C
o o
Min. -17.64 -17.3
Typ. -18 -18
Max. -18.36 -18.7 360 180 360 180 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ C V dB V A A
o
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 oC Io = 5 to 1000 mA Vi = -22 to -33 V Io = 5 mA
-1
o
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
300 54 60 1.1 1.1 2.2
Io = 1 A Tj = 25 C VO = 100 mV
ELECTRICAL CHARACTERISTICS FOR L7920A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -29V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = -24 to -35 V Vi = -23 to -35 V Vi = -26 to -32 V Po 15 W Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C
o
Min. -19.6 -19.2
Typ. -20 -20
Max. -20.4 -20.8 400 200 400 200 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ o C V dB V A A
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 C Io = 5 to 1000 mA Vi = -24 to -35 V Io = 5 mA
o
-1.1
o
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
350 54 60 1.1 0.9 2.2
Io = 1 A Tj = 25 C VO = 100 mV
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.
6/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7922A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -31V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = -26 to -37 V Vi = -25 to -37 V Vi = -28 to -34 V Po 15 W Tj = 25 oC o Tj = 25 C Tj = 25 C o Tj = 25 C
o o
Min. -21.5 -21.1
Typ. -22 -22
Max. -22.4 -22.8 440 220 440 220 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ C V dB V A A
o
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 oC Io = 5 to 1000 mA Vi = -26 to -37 V Io = 5 mA
-1.1
o
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
375 54 60 1.1 1.1 2.2
Io = 1 A Tj = 25 C VO = 100 mV
ELECTRICAL CHARACTERISTICS FOR L7924A (refer to the test circuits, Tj = 0 to 125 oC, Vi = -33V, Io = 500 mA, Ci = 2.2 F, Co = 1 F unless otherwise specified)
Symbol Vo Vo V o * V o * Id I d I d Vo T eN SVR Vd I sc I s cp Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change Quiescent Current Change Output Voltage Drift Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current Tj = 25 C
o
Test Conditions Tj = 25 C Io = -5 mA to -1 A Vi = -27 to -38 V Vi = -27 to -38 V Vi = -30 to -36 V Po 15 W Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C
o
Min. -23.5 -23
Typ. -24 -24
Max. -24.5 -25 480 240 480 240 3 0.5 1
Unit V V mV mV mV mV mA mA mA mV/ o C V dB V A A
Io = 5 to 1500 mA Io = 250 to 750 mA Tj = 25 C Io = 5 to 1000 mA Vi = -27 to -38 V Io = 5 mA
o
-1
o
B = 10Hz to 100KHz Tj = 25 C Vi = 10 V f = 120 Hz
o
400 54 60 1.1 1.1 2.2
Io = 1 A Tj = 25 C VO = 100 mV
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.
7/11
L7900AC
APPLICATION INFORMATION Figure 1 : Fixed Output Regulator. Figure 2 : Split Power Supply ( 15V/1A).
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. C1 is required if regulator is located an appreciable distance from power supply filter. 3. To improve transient response. If large capacitors are used, a high current diode from input to output (1N4001 or similar) should be introduced to protect the device from momentary input short circuit.
Against potential latch-up problems.
Figure 3 : Circuit for Increasing Output Voltage.
Figure 4 : High Current Negative Regulator (- 5V/4A with 5A current limiting).
VO = V XX
R1+R2 R2
V XX > 3I d R2
C3 Optional for improved transient response and ripple rejection.
Figure 5 : Typical ECL System Power Supply (- 5.2V/4A).
Optional dropping resistor to reduce the power dissipated in the boost transistor.
8/11
L7900AC
TO-220 MECHANICAL DATA
DIM. MIN. A C D D1 E F F2 G H2 H3 L2 L3 L5 L6 L7 Dia. 26.3 2.6 15.1 6 3.65 10.05 16.2 26.7 27.1 3 15.8 6.6 3.85 1.035 0.102 0.594 0.236 0.144 2.4 1.2 0.35 0.61 1.15 4.95 5.08 mm TYP. MAX. 4.8 1.37 2.8 1.35 0.55 0.94 1.4 5.21 10.4 10.4 0.396 0.638 1.051 1.067 0.118 0.622 0.260 0.152 0.094 0.047 0.014 0.024 0.045 0.195 0.200 MIN. inch TYP. MAX. 0.189 0.054 0.110 0.053 0.022 0.037 0.055 0.205 0.409 0.409
P011D
9/11
L7900AC
TO-263 (D2PAK) MECHANICAL DATA
mm MIN. A A1 B B2 C C2 D E G L L2 L3 4.3 2.49 0.7 1.25 0.45 1.21 8.95 10 4.88 15 1.27 1.4 TYP. MAX. 4.6 2.69 0.93 1.4 0.6 1.36 9.35 10.28 5.28 15.85 1.4 1.75 MIN. 0.169 0.098 0.027 0.049 0.017 0.047 0.352 0.393 0.192 0.590 0.050 0.055 inch TYP. MAX. 0.181 0.106 0.036 0.055 0.023 0.053 0.368 0.404 0.208 0.624 0.055 0.068
DIM.
E C2 L2
A
D L L3
B2 B G
A1 C
P011P6/C
10/11
L7900AC
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. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. .
11/11

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