L7912CD2T-TR ,NEGATIVE VOLTAGE REGULATORSElectrical Characteristics Of L7908C (refer to the test circuits, T = 0 to 125°C, V = -14V,J I I = ..
L7912CP ,NEGATIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF L7952C (refer to the test circuits, T = 0 to 125°C, V = -10V,J II =50 ..
L7912CV ,NEGATIVE VOLTAGE REGULATORSL7900SERIESNEGATIVE VOLTAGE REGULATORS■ OUTPUT CURRENT UP TO 1.5A■ OUTPUT VOLTAGES OF -5; -5.2; -6; ..
L7912CV. ,NEGATIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF L7908C (refer to the test circuits, T = 0 to 125°C, V = -14V,J II =50 ..
L7915ACV ,+ 2% NEGATIVE VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS OF L7905A (refer to the test circuits, T = 0 to 125°C, V = -10V,J II =50 ..
L7915CD2T ,NEGATIVE VOLTAGE REGULATORSABSOLUTE MAXIMUM RATINGSSymbol Parameter² Value UnitDC Input Voltage for V = 5 to 18V-35OVVIfor V = ..
LC6520C ,Single-Chip 4-Bit Microcomputers for Medium/Large-Scale Control-Oriented ApplicationsFeatures3 Instruction set with 80 instructions (Common to the LC6500 series)I ROM/RAM4096 bytes/102 ..
LC6520H ,Single-Chip 4-Bit Microcomputers for Medium/Large-Scale Control-Oriented ApplicationsFeatures3 Instruction set with 80 instructions (Common to the LC6500 series)I ROM/RAM4096 bytes/102 ..
LC6522C ,Single-Chip 4-Bit Microcomputers for Medium/Large-Scale Control-Oriented ApplicationsFeatures3 Instruction set with 80 instructions (Common to the LC6500 series)I ROM/RAM4096 bytes/102 ..
LC6527F ,Single Chip 4-Bit Microcontroller for Small-Scale Control-Oriented ApplicationsFeatures1) CMOS technology for a low-power operation (with instruction-controlled standby function) ..
LC6527H ,CMOS LSI SINGLE
LC6527H ,CMOS LSI SINGLE
L7905CD2T-TR-L7912CD2T-TR
NEGATIVE VOLTAGE REGULATORS
1/17June 2004 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 D2 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
SERIESNEGATIVE VOLTAGE REGULATORS
SCHEMATIC DIAGRAMRev. 9
L7900 SERIES2/17
Table 1: Absolute Maximum Ratings Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
Table 2: Thermal Data
Figure 1: Connection Diagram (top view)
L7900 SERIES3/17
Table 3: Ordering Codes (#) Available in Tape & Reel with the suffix "-TR".
(*) Available on Request.
Figure 2: Test Circuit
Table 4: Electrical Characteristics Of L7905C (refer to the test circuits, TJ = 0 to 125°C, VI = -10V,
IO = 500 mA, CI = 2.2 µF, C O = 1 µF unless otherwise specified).
(*) 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.
L7900 SERIES4/17
Table 5: Electrical Characteristics Of L7906C (refer to the test circuits, TJ = 0 to 125°C, VI = -11V,O = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
(*) 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.
Table 6: Electrical Characteristics Of L7908C (refer to the test circuits, TJ = 0 to 125°C, VI = -14V,IO = 500 mA, CI = 2.2 µF, C O = 1 µF unless otherwise specified).
(*) 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.
L7900 SERIES5/17
Table 7: Electrical Characteristics Of L7912C (refer to the test circuits, TJ = 0 to 125°C, VI = -19V,O = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
(*) 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.
Table 8: Electrical Characteristics Of L7915C (refer to the test circuits, TJ = 0 to 125°C, VI = -23V,IO = 500 mA, CI = 2.2 µF, C O = 1 µF unless otherwise specified).
(*) 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.
L7900 SERIES6/17
Table 9: Electrical Characteristics Of L7918C (refer to the test circuits, TJ = 0 to 125°C, VI = -27V,O = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
(*) 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.
Table 10: Electrical Characteristics Of L7920C (refer to the test circuits, TJ = 0 to 125°C, VI = -29V,IO = 500 mA, CI = 2.2 µF, C O = 1 µF unless otherwise specified).
(*) 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.
L7900 SERIES7/17
Table 11: Electrical Characteristics Of L7924C (refer to the test circuits, TJ = 0 to 125°C, VI = -33V,O = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
(*) 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.
APPLICATIONS INFORMATION
Figure 3: Fixed Output Regulator NOTE:
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 electrolytics 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 intro-
duced to protect the device from momentary input short circuit.
L7900 SERIES8/17
Figure 4: Split Power Supply (± 15V/1A) Against potential latch-up problems.
Figure 5: Circuit for Increasing Output Voltage C3 Optional for improved transient response and ripple rejection.
Figure 6: High Current Negative Regulator (-5V/4A with 5A current limiting)
