LM78XX / LM78XXA 3-Terminal A Positive oltage Regulator Features Output Current up to A s: 5, 6, 8, 9, 0,, 5, 8, 4 Thermal Overload Protection Short-Circuit Protection Output Transistor Safe Operating Area Protection Description September 04 The LM78XX series of three-terminal positive regulators is available in the TO-0 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down, and safe operating area protection. If adequate heat sinking is provided, they can deliver over A output current. Although designed primarily as fixedvoltage regulators, these devices can be used with external components for adjustable voltages and currents. TO-0 (Single Gauge) GND. Input. GND 3. Output Ordering Information () Product Number LM7805CT LM7806CT LM7808CT LM7809CT LM780CT LM78CT LM785CT LM788CT LM784CT LM7805ACT LM7809ACT LM780ACT LM78ACT LM785ACT Tolerance ±4% Package TO-0 (Single Gauge) Operating Temperature -40 C to +5 C ±% 0 C to +5 C Packing Method Rail Note:. Above output voltage tolerance is available at 5 C. LM78XX / LM78XXA Rev..3.
Block Diagram Input Starting Circuit Absolute Maximum Ratings Current Generator Reference oltage Error Amplifier Figure. Block Diagram SOA Protection Thermal Protection Series Pass Element Output 3 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. alues are at T A = 5 C unless otherwise noted. GND Symbol Parameter alue Unit I Input oltage = 5 to 8 35 = 4 40 R θjc Thermal Resistance, Junction-Case (TO-0) 5 C/W R θja Thermal Resistance, Junction-Air (TO-0) 65 C/W T OPR Operating Temperature Range LM78xx -40 to +5 LM78xxA 0 to +5 C T STG Storage Temperature Range - 65 to +50 C LM78XX / LM78XXA Rev..3.
Electrical Characteristics (LM7805) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 0, C I = 0. μf, unless otherwise specified. Regline Line Regulation () T J = +5 C T J = +5 C 4.80 5.00 5.0 I O = 5 ma to A, P O 5 W, I = 7 to 0 4.75 5.00 5.5 I = 7 to 5 4.0 00.0 I = 8 to.6 50.0 Regload Load Regulation () I O = 5 ma to.5 A 9.0 00.0 T J = +5 C I O = 50 ma to 750 ma 4.0 50.0 I Q Quiescent Current T J = +5 C 5 8 ma Quiescent Current I O = 5 ma to A 0.03 0.50 I = 7 to 5 0.30.30 ma Δ /ΔT Drift (3) I O = 5 ma -0.8 / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 4 μ RR Ripple Rejection (3) f = 0 Hz, I = 8 to 8 6 73 db DROP Dropout oltage T J = +5 C, I O = A R O Output Resistance (3) f = khz 5 mω I SC Short-Circuit Current T J = +5 C, I = 35 30 ma I PK Peak Current (3) T J = +5 C. A. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 3. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 3
Electrical Characteristics (LM7806) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I =, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (4) T J = +5 C T J = +5 C 5.75 6.00 6.5 I O = 5 ma to A, P O 5 W, I = 8.0 to 5.70 6.00 6.30 I = 8 to 5 5.0 0.0 I = 9 to 3.5 60.0 Regload Load Regulation (4) I O = 5 ma to.5 A 9.0 0.0 T J = +5 C I O = 50 ma to 750 ma 3.0 60.0 I Q Quiescent Current T J = +5 C 5 8 ma Quiescent Current I O = 5 ma to A 0.5 I = 8 to 5.3 ma Δ /ΔT Drift (5) I O = 5 ma -0.8 / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 45 μ RR Ripple Rejection (5) f = 0 Hz, I = 8 to 8 6 73 db DROP Dropout oltage T J = +5 C, I O = A R O Output Resistance (5) f = khz 9 mω I SC Short-Circuit Current T J = +5 C, I = 35 50 ma I PK Peak Current (5) T J = +5 C. A 4. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 5. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 4
Electrical Characteristics (LM7808) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 4, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (6) T J = +5 C T J = +5 C 7.7 8.0 8.3 I O = 5 ma to A, P O 5 W, I = 0.5 to 3 7.6 8.0 8.4 I = 0.5 to 5 5 60 I =.5 to 7 80 Regload Load Regulation (6) I O = 5 ma to.5 A 0 60 T J = +5 C I O = 50 ma to 750 ma 5 80 I Q Quiescent Current T J = +5 C 5 8 ma Quiescent Current I O = 5 ma to A 0.05 0.50 I = 0.5 to 5 0.5.0 ma Δ /ΔT Drift (7) I O = 5 ma -0.8 / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 5 μ RR Ripple Rejection (7) f = 0 Hz, I =.5 to.5 56 73 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (7) f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 30 ma I PK Peak Current (7) T J = +5 C. A 6. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 7. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 5
Electrical Characteristics (LM7809) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 5, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (8) T J = +5 C T J = +5 C 8.65 9.00 9.35 I O = 5 ma to A, P O 5 W, I =.5 to 4 8.60 9.00 9.40 I =.5 to 5 6 80 I = to 7 90 Regload Load Regulation (8) I O = 5 ma to.5 A 80 T J = +5 C I O = 50 ma to 750 ma 4 90 I Q Quiescent Current T J = +5 C 5 8 ma Quiescent Current I O = 5 ma to A 0.5 I =.5 to 6.3 ma Δ /ΔT Drift (9) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 58 μ RR Ripple Rejection (9) f = 0 Hz, I = 3 to 3 56 7 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (9) f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (9) T J = +5 C. A 8. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 9. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 6
Electrical Characteristics (LM780) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 6, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (0) T J = +5 C T J = +5 C 9.6 0.0 0.4 I O = 5 ma to A, P O 5 W, I =.5 to 5 9.5 0.0 0.5 I =.5 to 5 0 00 I = 3 to 5 3 00 Regload Load Regulation (0) I O = 5 ma to.5 A 00 T J = +5 C I O = 50 ma to 750 ma 4 400 I Q Quiescent Current T J = +5 C 5. 8.0 ma Quiescent Current I O = 5 ma to A 0.5 I =.5 to 9.0 ma Δ /ΔT Drift () I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 58 μ RR Ripple Rejection () f = 0 Hz, I = 3 to 3 56 7 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance () f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current () T J = +5 C. A 0. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used.. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 7
Electrical Characteristics (LM78) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 9, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation () T J = +5 C T J = +5 C.5.0.5 I O = 5 ma to A, P O 5 W, I = 4.5 to 7.4.0.6 I = 4.5 to 30 0 40 I = 6 to 3 0 Regload Load Regulation () I O = 5 ma to.5 A 40 T J = +5 C I O = 50 ma to 750 ma 5 0 I Q Quiescent Current T J = +5 C 5. 8.0 ma Quiescent Current I O = 5 ma to A 0. 0.5 I = 4.5 to 30 0.5.0 ma Δ /ΔT Drift (3) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 76 μ RR Ripple Rejection (3) f = 0 Hz, I = 5 to 5 55 7 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (3) f = khz 8 mω I SC Short-Circuit Current I = 35, T J = +5 C 30 ma I PK Peak Current (3) T J = +5 C. A. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 3. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 8
Electrical Characteristics (LM785) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 3, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (4) T J = +5 C T J = +5 C 4.40 5.00 5.60 I O = 5 ma to A, P O 5 W, I = 7.5 to 30 4.5 5.00 5.75 I = 7.5 to 30 300 I = 0 to 6 3 50 Regload Load Regulation (4) I O = 5 ma to.5 A 300 T J = +5 C I O = 50 ma to 750 ma 4 50 I Q Quiescent Current T J = +5 C 5. 8.0 ma Quiescent Current I O = 5 ma to A 0.5 I = 7.5 to 30.0 ma Δ /ΔT Drift (5) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 90 μ RR Ripple Rejection (5) f = 0 Hz, I = 8.5 to 8.5 54 70 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (5) f = khz 9 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (5) T J = +5 C. A 4. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 5. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 9
Electrical Characteristics (LM788) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 7, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (6) T J = +5 C T J = +5 C 7.3 8.0 8.7 I O = 5 ma to A, P O 5 W, I = to 33 7. 8.0 8.9 I = to 33 5 360 I = 4 to 30 5 80 Regload Load Regulation (6) I O = 5 ma to.5 A 5 360 T J = +5 C I O = 50 ma to 750 ma 5 80 I Q Quiescent Current T J = +5 C 5. 8.0 ma Quiescent Current I O = 5 ma to A 0.5 I = to 33.0 ma Δ /ΔT Drift (7) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 0 μ RR Ripple Rejection (7) f = 0 Hz, I = to 3 53 69 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (7) f = khz mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (7) T J = +5 C. A 6. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 7. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 0
Electrical Characteristics (LM784) Refer to the test circuit, -40 C < T J < 5 C, I O = 500 ma, I = 33, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (8) T J = +5 C T J = +5 C 3.00 4.00 5.00 I O = 5 ma to A, P O 5 W, I = 7 to 38.80 4.00 5.5 I = 7 to 38 7 480 I = 30 to 36 6 40 Regload Load Regulation (8) I O = 5 ma to.5 A 5 480 T J = +5 C I O = 50 ma to 750 ma 5 40 I Q Quiescent Current T J = +5 C 5. 8.0 ma Quiescent Current I O = 5 ma to A 0. 0.5 I = 7 to 38 0.5.0 ma Δ /ΔT Drift (9) I O = 5 ma -.5 / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 0 μ RR Ripple Rejection (9) f = 0 Hz, I = 8 to 38 50 67 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (9) f = khz 8 mω I SC Short-Circuit Current I = 35, T J = +5 C 30 ma I PK Peak Current (9) T J = +5 C. A 8. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 9. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3.
Electrical Characteristics (LM7805A) Refer to the test circuit, 0 C < T J < 5 C, I O = A, I = 0, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (0) T J = +5 C 4.9 5.0 5. I O = 5 ma to A, P O 5 W, I = 7.5 to 0 4.8 5.0 5. I = 7.5 to 5, I O = 500 ma 5.0 50.0 I = 8 to 3.0 50.0 T J = +5 C I = 7.3 to 0 5.0 50.0 I = 8 to.5 5.0 Regload Load Regulation (0) I O = 5 ma to A 9 00 T J = +5 C, I O = 5 ma to.5 A 9 00 I O = 50 ma to 750 ma 4 50 I Q Quiescent Current T J = +5 C 5 6 ma I O = 5 ma to A 0.5 Quiescent Current I = 8 to 5, I O = 500 ma 0.8 ma I = 7.5 to 0, T J = +5 C 0.8 Δ /ΔT Drift () I O = 5 ma -0.8 / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 4 μ RR Ripple Rejection () f = 0 Hz, = 500 ma, I =8 to 8 68 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance () f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current () T J = +5 C. A 0. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used.. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3.
Electrical Characteristics (LM7809A) Refer to the test circuit, 0 C < T J < 5 C, I O = A, I = 5, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation () T J = +5 C 8.8 9.00 9.6 I O = 5 ma to A, P O 5 W, I =. to 4 8.65 9.00 9.35 I =.7 to 5, I O = 500 ma 6 90 I =.5 to 9 4 45 T J = +5 C I =.5 to 4 6 90 I =.5 to 9 45 Regload Load Regulation () I O = 5 ma to A 00 T J = +5 C, I O = 5 ma to.5 A 00 I O = 50 ma to 750 ma 5 50 I Q Quiescent Current T J = +5 C 5 6 ma I O = 5 ma to A 0.5 Quiescent Current I = to 5, I O = 500 ma 0.8 ma I =.7 to 5, T J = +5 C 0.8 Δ /ΔT Drift (3) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 58 μ RR Ripple Rejection (3) f = 0 Hz, = 500 ma, I = to 6 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (3) f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (3) T J = +5 C. A. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 3. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 3
Electrical Characteristics (LM780A) Refer to the test circuit, 0 C < T J < 5 C, I O = A, I = 6, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (4) T J = +5 C 9.8 0.0 0. I O = 5 ma to A, P O 5 W, I =.8 to 5 9.6 0.0 0.4 I =.8 to 6, I O = 500 ma 8 00 I = 3 to 0 4 50 T J = +5 C I =.5 to 5 8 00 I = 3 to 0 3 50 Regload Load Regulation (4) I O = 5 ma to A 00 T J = +5 C, I O = 5 ma to.5 A 00 I O = 50 ma to 750 ma 5 50 I Q Quiescent Current T J = +5 C 5 6 ma I O = 5 ma to A 0.5 Quiescent Current I =.8 to 5, I O = 500 ma 0.8 ma I = 3 to 6, T J = +5 C 0.5 Δ /ΔT Drift (5) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 58 μ RR Ripple Rejection (5) f = 0 Hz, = 500 ma, I =4 to 4 6 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (5) f = khz 7 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (5) T J = +5 C. A 4. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 5. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 4
Electrical Characteristics (LM78A) Refer to the test circuit, 0 C < T J < 5 C, I O = A, I = 9, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (6) T J = +5 C.75.00.5 I O = 5 ma to A, P O 5 W, I = 4.8 to 7.50.00.50 I = 4.8 to 30, I O = 500 ma 0 0 I = 6 to 4 0 T J = +5 C I = 4.5 to 7 0 0 I = 6 to 3 60 Regload Load Regulation (6) I O = 5 ma to A 00 T J = +5 C, I O = 5 ma to.5 A 00 I O = 50 ma to 750 ma 5 50 I Q Quiescent Current T J = +5 C 5 6 ma I O = 5 ma to A 0.5 Quiescent Current I = 4 to 7, I O = 500 ma 0.8 ma I = 5 to 30, T J = +5 C 0.8 Δ /ΔT Drift (7) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 76 μ RR Ripple Rejection (7) f = 0 Hz, = 500 ma, I =4 to 4 60 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (7) f = khz 8 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (7) T J = +5 C. A 6. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 7. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 5
Electrical Characteristics (LM785A) Refer to the test circuit, 0 C < T J < 5 C, I O = A, I = 3, C I = 0.33 μf, C O = 0. μf, unless otherwise specified. Regline Line Regulation (8) T J = +5 C 4.75 5.00 5.30 I O = 5 ma to A, P O 5 W, I = 7.7 to 30 4.40 5.00 5.60 I = 7.4 to 30, I O = 500 ma 0 50 I = 0 to 6 5 50 T J = +5 C I = 7.5 to 30 50 I = 0 to 6 3 75 Regload Load Regulation (8) I O = 5 ma to A 00 T J = +5 C, I O = 5 ma to.5 A 00 I O = 50 ma to 750 ma 5 50 I Q Quiescent Current T J = +5 C 5. 6.0 ma I O = 5 ma to A 0.5 Quiescent Current I = 7.5 to 30, I O = 500 ma 0.8 ma I = 7.5 to 30, T J = +5 C 0.8 Δ /ΔT Drift (9) I O = 5 ma - / C N Output Noise oltage f = 0 Hz to 00 khz, T A = +5 C 90 μ RR Ripple Rejection (9) f = 0 Hz, = 500 ma, I =8.5 to 8.5 58 db DROP Dropout oltage I O = A, T J = +5 C R O Output Resistance (9) f = khz 9 mω I SC Short-Circuit Current I = 35, T J = +5 C 50 ma I PK Peak Current (9) T J = +5 C. A 8. Load and line regulation are specified at constant junction temperature. s in due to heating effects must be taken into account separately. Pulse testing with low duty is used. 9. These parameters, although guaranteed, are not 00% tested in production. LM78XX / LM78XXA Rev..3. 6
Typical Performance Characteristics QUIESCENT CURRENT (ma) NORMALIZED OUTPUT OLTAGE () 6 5.75 5.5 5.5 5 4.75 I = 0 = 5 I O = 5mA 4.5-50 -5 0 5 50 75 00 5 JUNCTION TEMPERATURE ( C) Figure. Quiescent Current.0.0 0.99 I = 5 I O = 5mA 0.98-50 -5 0 5 50 75 00 5 JUNCTION TEMPERATURE ( C) Figure 4. QUIESCENT CURRENT (ma) OUTPUT CURRENT (A) 3.5.5.5 0 0 7 6.5 6 5.5 5 4.5 T J = 5 C Δ = 00 5 0 5 0 5 30 35 INPUT-OUTPUT DIFFERENTIAL () Figure 3. Peak Output Current T J = 5 C = 5 I O = 0mA 4 5 0 5 0 5 30 35 INPUT OLTAGE () Figure 5. Quiescent Current LM78XX / LM78XXA Rev..3. 7
Typical Applications Input 0.33μF Input C I LM78XX 3 LM78XX 0.33μF Figure 6. DC Parameters 3 N6 or EQ R L C O Output 0.μF Output 70pF 00Ω 30μS 0 Figure 7. Load Regulation Input 5.Ω LM78XX 3 Output 0.33μF R L 470μF 0Hz + Figure 8. Ripple Rejection LM78XX / LM78XXA Rev..3. 8
Typical Applications (Continued) Input C I Input C I 3 LM78XX 0.33μF Figure 9. Fixed-Output Regulator 3 LM78XX 0.33μF I Q XX I O = +I R Q Figure 0. Constant Current Regulator 9. To specify an output voltage, substitute voltage value for XX. A common ground is required between the input and the output voltage. The input voltage must remain typically.0 above the output voltage even during the low point on the input ripple voltage. 30. C I is required if regulator is located an appreciable distance from power supply filter. 3. C O improves stability and transient response. C O 0.μF C O 0.μF XX R R L Output IO Output Input 3 LM78XX Output C I 0.33μF C XX O 0.μF R I Q I RI 5 I Q = XX ( + R / R ) + I Q R R Figure. Circuit for Increasing LM78XX / LM78XXA Rev..3. 9
Typical Applications (Continued) Input C I 0.33μF I RI 5 I Q = XX ( + R / R ) + I Q R Input R = BEQ LM7805 3 6 - LM74 + 3 4 Figure. Adjustable Output Regulator (7 to 30 ) R 3Ω I REG I Q / B Q Q BD536 IREG 0.33μF IQ LM78XX 3 0kΩ Output C O 0.μF Output I O 0.μF I O = I REG + B Q (I REG BEQ /R ) Figure 3. High-Current oltage Regulator Input R SC Q Q R 3Ω Q = TIP4 Q = TIP4 0.33μF LM78XX 3 0.μF Output R SC = BEQ I SC Figure 4. High Output Current with Short-Circuit Protection LM78XX / LM78XXA Rev..3. 0
Typical Applications (Continued) 3 LM78XX I 0.33μF 0.μF 4.7kΩ 7 COMMON COMMON _ 6 LM74 4 + 3 4.7kΩ - IN TIP4 - Figure 5. Tracking oltage Regulator 3 LM785 +0 +5 0.33μF 0.μF N400 +.μf μf + -0 MC795 3 N400-5 Figure 6. Split Power Supply (±5 - A) LM78XX / LM78XXA Rev..3.
Typical Applications (Continued) Input + 0.μF LM78XX 3 Figure 7. Negative Circuit Input D45H mh Output Output 4.7Ω 470Ω Z LM78XX 3 + 0μF 0.5Ω 0.33μF + 000μF Figure 8. Switching Regulator LM78XX / LM78XXA Rev..3.
Physical Dimensions Figure 9. TO-0, MOLDED, 3-LEAD, JEDEC ARIATION AB (ACTIE) LM78XX / LM78XXA Rev..3. 3
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