L78M12AC

L78MxxAB L78MxxAC Precision 500 mA regulators Features ■ ■ ■ ■ ■ ■ ■ Output current to 0.5 A Output voltages of 5; 6; 8; 9; 10; 12; 15; 18; 24 V Thermal overload protection Short circuit protection Output transition SOA protection ± 2 % Output voltage tolerance Guaranteed in extended temperature range with external components to obtain adjustable voltage and currents. TO-220 DPAK Description The L78MxxAB series of three-terminal positive regulators is available in TO-220 and DPAK packages and with 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. Each type employs internal current limiting, thermal shutdown and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 0.5 A output current. Although designed primarily as fixed voltage regulators, these devices can be used Table 1. Device summary Part number L78M05AB L78M05AC L78M06AB L78M08AB L78M08AC L78M09AB L78M10AB L78M12AB L78M12AC L78M15AB L78M24AB L78M24AC February 2008 Rev 6 1/29 www.st.com 29 Contents L78MxxAB - L78MxxAC Contents 1 2 3 4 5 6 7 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test circuits ............................................... 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.1 Design considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 8 9 10 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2/29 L78MxxAB - L78MxxAC Diagram 1 Figure 1. Diagram Block diagram 3/29 Pin configuration L78MxxAB - L78MxxAC 2 Figure 2. Pin configuration Pin connections (top view) TO-220 DPAK Figure 3. Schematic diagram 4/29 L78MxxAB - L78MxxAC Maximum ratings 3 Table 2. Symbol VI IO PD TSTG TOP Maximum ratings Absolute maximum ratings Parameter DC input voltage Output current Power dissipation Storage temperature range for L78M00AC Operating junction temperature range for L78M00AB -40 to 125 for VO= 5 to 18V for VO= 20, 24V Value 35 V 40 Internally limited Internally limited -65 to 150 0 to 125 °C mA mW °C Unit Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied Thermal data Parameter Thermal resistance junction-case Thermal resistance junction-ambient TO-220 3 50 DPAK 8 100 Unit °C/W °C/W Table 3. Symbol RthJC RthJA Figure 4. Application circuit 5/29 Test circuits L78MxxAB - L78MxxAC 4 Figure 5. Test circuits DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 6/29 L78MxxAB - L78MxxAC Electrical characteristics 5 Table 4. Electrical characteristics Electrical characteristics of L78M05XX (refer to the test circuits, VI = 10 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125°C (AC) unless otherwise specified) Parameter Output voltage Output voltage Line regulation TJ = 25°C IO = 5 to 350 mA, VI = 7 to 20 V VI = 7 to 25 V, IO = 200 mA, TJ = 25°C VI = 8 to 25 V, IO = 200 mA, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 8 to 25 V IO = 5 mA VI = 8 to 18 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C TJ = 25°C, VI = 35 V TJ = 25°C 62 40 2 300 700 -0.5 Test conditions Min. 4.9 4.8 Typ. 5 5 Max. 5.1 5.2 100 mV 50 100 mV 50 6 0.5 mA 0.8 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp 7/29 Electrical characteristics Table 5. L78MxxAB - L78MxxAC Electrical characteristics of L78M06XX (refer to the test circuits, VI = 11 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage Line regulation TJ = 25°C IO = 5 to 350 mA, VI = 8 to 21 V VI = 8 to 25 V, IO = 200 mA, TJ = 25°C VI = 9 to 25 V, IO = 200 mA, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 9 to 25 V IO = 5 mA VI = 9 to 19 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz TJ = 25°C TJ = 25°C, VI = 35 V TJ = 25°C 59 45 2 270 700 -0.5 Test conditions Min. 5.88 5.75 Typ. 6 6 Max. 6.12 6.3 100 mV 30 120 mV 60 6 0.5 mA 0.8 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp 8/29 L78MxxAB - L78MxxAC Electrical characteristics Table 6. Electrical characteristics of L78M08XX (refer to the test circuits, VI = 14 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = 5 to 350 mA, VI = 10.5 to 23 V VI = 10.5 to 25 V, IO = 200 mA, TJ = 25°C VI = 11 to 25 V, IO = 200 mA, TJ = 25°C Test conditions Min. 7.84 7.7 Typ. 8 8 Max. 8.16 8.3 100 mV 30 160 mV 80 6 0.5 mA 0.8 -0.5 56 52 2 250 700 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO Line regulation ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 10.5 to 25 V IO = 5 mA VI = 11.5 to 21.5 V, f = 120Hz IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C TJ = 25°C, VI = 35 V TJ = 25°C 9/29 Electrical characteristics L78MxxAB - L78MxxAC Table 7. Electrical characteristics of L78M09XX (refer to the test circuits, VI = 15 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = 5 to 350 mA, VI = 11.5 to 24 V VI = 11.5 to 25 V, IO = 200 mA, TJ = 25°C VI = 12 to 25 V, IO = 200 mA, TJ = 25°C Test conditions Min. 8.82 8.64 Typ. 9 9 Max. 9.18 9.36 100 mV 30 180 mV 90 6 0.5 mA 0.8 -0.5 56 52 2 250 700 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO Line regulation ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 11.5 to 25 V IO = 5 mA VI = 12.5 to 23 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C VI = 35 V, TJ = 25°C TJ = 25°C 10/29 L78MxxAB - L78MxxAC Electrical characteristics Table 8. Electrical characteristics of L78M10XX (refer to the test circuits, VI = 16 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = 5 to 350 mA, VI = 12.5 to 25 V VI = 12.5 to 30 V, IO = 200 mA, TJ = 25°C VI = 13 to 30 V, IO = 200 mA, TJ = 25°C Test conditions Min. 9.8 9.6 Typ. 10 10 Max. 10.2 10.4 100 mV 30 200 mV 100 6 0.5 mA 0.8 -0.5 56 64 2 245 700 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO Line regulation ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 12.5 to 30 V IO = 5 mA VI = 13.5 to 24 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C VI = 35 V, TJ = 25°C TJ = 25°C 11/29 Electrical characteristics L78MxxAB - L78MxxAC Table 9. Electrical characteristics of L78M12XX (refer to the test circuits, VI = 19 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = 5 to 350 mA, VI = 14.5 to 27 V VI = 14.5 to 30 V, IO = 200 mA, TJ = 25°C VI = 16 to 30 V, IO = 200 mA, TJ = 25°C Test conditions Min. 11.75 11.5 Typ. 12 12 Max. 12.25 12.5 100 mV 30 240 mV 120 6 0.5 mA 0.8 -1 55 75 2 240 700 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO Line regulation ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 14.5 to 30 V I O = 5 mA VI = 15 to 25 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C VI = 35 V, TJ = 25°C TJ = 25°C 12/29 L78MxxAB - L78MxxAC Electrical characteristics Table 10. Electrical characteristics of L78M15XX (refer to the test circuits, VI = 23 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = 5 to 350 mA, VI = 17.5 to 30 V VI = 17.5 to 30 V, IO = 200 mA, TJ = 25°C VI = 20 to 30 V, IO = 200 mA, TJ = 25°C Test conditions Min. 14.7 14.4 Typ. 15 15 Max. 15.3 15.6 100 mV 30 300 mV 150 6 0.5 mA 0.8 -1 54 90 2 240 700 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO Line regulation ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 17.5 to 30 V I O = 5 mA VI = 18.5 to 28.5 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C VI = 35 V, TJ = 25°C TJ = 25°C 13/29 Electrical characteristics Table 11. L78MxxAB - L78MxxAC Electrical characteristics of L78M24XX (refer to the test circuits, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified) Parameter Output voltage Output voltage Line regulation TJ = 25°C IO = 5 to 350 mA, VI = 27 to 38 V VI = 27 to 38 V, IO = 200 mA, TJ = 25°C VI = 28 to 38 V, IO = 200 mA, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Supply voltage rejection Output noise voltage Dropout voltage Short circuit current Short circuit peak current IO = 5 to 500 mA, TJ = 25°C IO = 5 to 200 mA, TJ = 25°C TJ = 25°C IO = 5 to 350 mA IO = 200 mA, VI = 27 to 38 V IO = 5 mA VI = 28 to 38 V, f = 120Hz, IO = 300mA, TJ = 25°C B =10Hz to 100kHz, TJ = 25°C TJ = 25°C VI = 35 V, TJ = 25°C TJ = 25°C 50 170 2 240 700 -1.2 Test conditions Min. 23.5 23 Typ. 24 24 Max. 24.5 25 100 mV 30 480 mV 240 6 0.5 mA 0.8 mV/°C dB µV V mA mA mA Unit V V Symbol VO VO ΔVO ΔVO Id ΔI d ΔVO/ΔT SVR eN Vd Isc Iscp 14/29 L78MxxAB - L78MxxAC Typical performance 6 Figure 8. Typical performance Dropout voltage vs junction temp. Figure 9. Dropout characteristics Figure 10. Peak output current vs input-output Figure 11. Output voltage vs junction differential voltage temperature Figure 12. Supply voltage rejection vs freq. Figure 13. Quiescent current vs junction temp. 15/29 Typical performance L78MxxAB - L78MxxAC Figure 14. Load transient response Figure 15. Line transient response Figure 16. Quiescent current vs input voltage 16/29 L78MxxAB - L78MxxAC Applications information 7 7.1 Applications information Design considerations The L78MxxAB series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor Safe-Area compensation that reduces the output short-circuit as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. Figure 17. Current regulator IO = VXX/R1+Id Figure 18. Adjustable output regulator VO = 7.0V to 20V VI - VO ≥ 2.0V 17/29 Applications information L78MxxAB - L78MxxAC Figure 19. Current boost regulator VBEQ1 R1 = ______________ IREQ-(IQ1/βQ1) VBEQ1 IO = IREG + Q1 (IREG ______) R1 Figure 20. Short-circuit protection Note: The circuit of Figure 19 can be modified to provide supply protection against short circuits by adding a short-circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short-circuit current of the three-terminal regulator. Therefore, a four-ampere plastic power transistor is specified. 18/29 L78MxxAB - L78MxxAC Package mechanical data 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 19/29 Package mechanical data L78MxxAB - L78MxxAC TO-220 mechanical data Dim. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. Min. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 Typ. Max. 4.60 1.32 2.72 Min. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch. Typ. Max. 0.181 0.051 0.107 P011C 20/29 L78MxxAB - L78MxxAC Package mechanical data Figure 21. Drawing dimension DPAK type STD-ST 0068772/G 21/29 Package mechanical data L78MxxAB - L78MxxAC Figure 22. Drawing dimension DPAK type FUJITSU-Subcon. 0068772/G 22/29 L78MxxAB - L78MxxAC Package mechanical data Figure 23. Drawing dimension DPAK TYPE IDS-Subcon. 0068772/G 23/29 Package mechanical data L78MxxAB - L78MxxAC Table 12. DPAK mechanical data Type STD-ST Type FUJITSU-Subcon. mm. Max. 2.40 1.10 0.23 0.90 5.40 0.60 0.60 6.20 5.10 6.40 4.70 2.28 4.40 9.35 1.00 2.80 0.80 0.60 0.20 0° 8° 0° 1.00 1.03 0.70 0.40 8° 0° 1.13 0.90 4.60 10.10 9.90 1.40 10.30 1.60 2.23 6.60 Min. 2.25 0.96 0 0.76 5.28 0.46 0.46 6.05 5.27 6.55 6.60 4.77 2.28 2.33 4.51 9.40 0.90 2.50 0.89 0.64 0.20 8° 2.65 1.27 1.02 Typ. 2.30 Max. 2.35 1.06 0.10 0.86 5.38 0.56 0.56 6.15 5.47 6.65 6.35 4.70 2.28 4.61 10.42 Min. 2.19 0.89 0.03 0.64 5.21 0.46 0.46 5.97 5.20 6.73 Type IDS-Subcon. mm. Typ. Max. 2.38 1.14 0.23 0.88 5.46 0.58 0.58 6.22 Dim. Min. A A1 A2 b b4 c c2 D D1 E E1 e e1 H L L1 L2 L4 R V2 2.20 0.90 0.03 0.64 5.20 0.45 0.48 6.00 mm. Typ. Note: The DPAK package coming from the two subcontractors (Fujitsu and IDS) are fully compatible with the ST's package suggested footprint. 24/29 L78MxxAB - L78MxxAC Package mechanical data Figure 24. DPAK footprint recommended data Table 13. Footprint data Values Dim. A B C D E F G mm. 6.70 6.70 1.8 3.0 1.60 2.30 2.30 inch. 0.264 0.64 0.070 0.118 0.063 0.091 0.091 25/29 Package mechanical data L78MxxAB - L78MxxAC Tape & reel DPAK-PPAK mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 Min. Typ. Max. 12.992 0.519 inch. 26/29 L78MxxAB - L78MxxAC Order codes 9 Table 14. Order codes Order codes Packaging Part numbers TO-220 L78M05AB L78M05AC L78M06AB L78M08AB L78M08AC L78M09AB L78M10AB L78M12AB L78M12AC L78M15AB L78M24AB L78M24AC L78M15ABV L78M24ABV L78M12ABV L78M09ABV L78M08ABV L78M05ABV DPAK L78M05ABDT-TR L78M05ACDT-TR L78M06ABDT-TR L78M08ABDT-TR L78M08ACDT-TR L78M09ABDT-TR L78M10ABDT-TR L78M12ABDT-TR L78M12ACDT-TR L78M15ABDT-TR L78M24ABDT-TR L78M24ACDT-TR Output voltage 5V 5V 6V 8V 8V 9V 10 V 12 V 12 V 15 V 24 V 24 V 27/29 Revision history L78MxxAB - L78MxxAC 10 Table 15. Date Revision history Document revision history Revision 3 4 5 6 Order Codes updated. DPAK mechanical data updated and add footprint data. Modified: Table 14. Modified: Table 14 on page 27. Changes 30-Aug-2006 05-Oct-2006 10-Dec-2007 20-Feb-2008 28/29 L78MxxAB - L78MxxAC Please Read Carefully: Information in this document is provided solely in connection with ST products. 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