LM2940,LM2940C LM2940/LM2940C 1A Low Dropout Regulator Literature Number: JAJSBB5
LM2940/LM2940C 1A 3 LM2940/LM2940C 0.5V 1V 1A 3V 1A 5V 30mA (V IN V OUT 3V) LM2940 * 1A Low Dropout Regulator LM2940C 1A Low Dropout Regulator LM2940 19860409 33200 24060 11800 DS008822 0.5V@I O 1A 1A P 2007 1 Updated to include LLP package fixed all typ curves and package drawings Converted to nat2000 DTD. Fix the pid for the book. CN updated with tape and reel with the new package name. SN Mil-Aero: Order Info table - moved J-15 part from WG row to J row, corrected part number. Under J pinout, corrected J-15 part number; under S pinout, adjusted layout of part numbers. Under Op Condns, added mil parts. In Elec Char for 12V, 15V parts, extended Ripple Rej parameter cell down to catch the next set of conditions. Under J mech dwg, corrected J-15 part number. WG Mil-Aero: Order Info table - reduced pt size for mil table, adjusted column widths a bit. WG Mil-Aero: Split Order Info table into two pieces, one for comm. & one for mil., because mil part numbers could not fit into allotted cells. Removed reference to AN1028 in App Hints. WG Mil-Aero: Fixed line breaks in Order Info table. Moved pinouts to follow Order Info, adjusted layout. Adjusted layout of Typ Perf Char curves to improve page breaks. WG Mil-Aero: removed fig entities for K package pinout & mech dwg. Mil-Aero: added fig entities for J16A & WG16A packages, & linked them to mech dwgs. Added fig entities for new pinout dwgs, & linked them. Ready to compose when pinout dwgs are done. WG Mil-Aero edits: Removed TO-3 package parts from Order table, AbsMax, Op Conditions, pinout & mech. dwg diagrams, added J16 & WG16 parts to Order table, pinouts, & mech dwg. Removed NewPage PI from pinout pages. Still need to add Fig Entities for new pinouts & mech dwgs. WG ** C OUT 22 F ESR ESR STABLE 20030124 LM2940/LM2940C 1A 3 LM2940/LM2940C National Semiconductor Corporation DS008822-14-JP 1
LM2940/LM2940C ( ) SOT-223 TO-220 (T) Plastic Package SOT-223 (MP) 3-Lead Front View See NS Package Number TO3B Front View See NS Package Number MP04A LLP (LD) 8-Lead SOT-263 (S) Surface-Mount Package Top View Side View See NS Package Number TS3B 2 7 DAP 5 6 Top View See NS Package Number LDC08A 2
(Note 1) LM2940S J WG T MP ( 100ms) LM2940CS T ( 1ms) (Note 2) (Note 3) TO-220 (T) TO-263 (S) 60V 45V 150 65 150 260 10 235 30 SOT-223 (MP) LLP-8 (LD) ESD (Note 4) (Note 1) LM2940T LM2940S LM2940CT LM2940CS LM2940IMP LM2940LD 260 30 235 30 2 kv 26V 40 T J 125 0 T J 125 40 T A 85 40 T J 125 LM2940/LM2940C V IN V O 5V I O 1A C O 22 F T A T J 25 3
LM2940/LM2940C ( ) V IN V O 5V I O 1A C O 22 F T A T J 25 V IN V O 5V I O 1A C O 22 F T A T J 25 4
( ) V IN V O 5V I O 1A C O 22 F T A T J 25 LM2940/LM2940C V IN V O 5V I O 1A C O 22 F T A T J 25 5
LM2940/LM2940C ( ) V IN V O 5V I O 1A C O 22 F T A T J 25 Note 1: Note 2: Note 3: Note 4: Note 5: IC T J JA T A ( ) JA TO-220 60 /W TO-263 80 /W SOT-223 174 /W ( ) LLP JA PCB LLP AN-1187 6 (SMD) JEDEC J-STD-020C Sn-Pb (STD) ESD 1.5k 100pF T A T J 25 ( ) ( ) T A T J 25 100 (SQC) Note 6: ( ) Note 7: 1A 6
Dropout Voltage Dropout Voltage vs. Temperature LM2940/LM2940C Output Voltage vs. Temperature Quiescent Current vs. Temperature Quiescent Current Quiescent Current 7
LM2940/LM2940C ( ) Line Transient Response Load Transient Response Ripple Rejection Low Voltage Behavior Low Voltage Behavior Low Voltage Behavior 8
( ) Low Voltage Behavior Low Voltage Behavior LM2940/LM2940C Low Voltage Behavior Output at Voltage Extremes Output at Voltage Extremes Output at Voltage Extremes 9
LM2940/LM2940C ( ) Output at Voltage Extremes Output at Voltage Extremes Output at Voltage Extremes Output Capacitor ESR Peak Output Current Output Impedance 10
( ) Maximum Power Dissipation (TO-220) Maximum Power Dissipation (SOT-223) LM2940/LM2940C Maximum Power Dissipation (TO-263) 11
LM2940/LM2940C 12
ESR( ) 22 F ( ) LM2940/LM2940C ESR ESR ESR Output Capacitor ESR I IN I L I G P D (V IN V OUT ) I L (V IN ) I G FIGURE 2. Power Dissipation Diagram T R(MAX) T R (MAX) T J(MAX) T A (MAX) T J (MAX) 125 T A(MAX) T R(MAX) P D JA (JA) T R(MAX) /P D FIGURE 1. ESR Limits ESR ESR 25 40 ESR 30 ESR 75 25 ( ) 2 ESR 2 ESR ESR ESR P D Figure 2 : (JA) TO-220 53 /W TO-263 80 /W SOT- 223 174 /W (JA) TO-220 TO-220 PC TO-263 (JA) - (H-A) (H A) (JA) (C H) (J C) (J-C) (J-C) 3 /W (C-H) (C-H) 1.5 /W 2.5 /W ( ) 2 /W (H-A) 13
LM2940/LM2940C ( ) (H-A) TO-263 TO-263 ("S") PCB PCB Figure 3 1 (35 m) TO-263 (JA) FIGURE 4. Maximum Power Dissipation vs. T AMB for the TO-263 Package FIGURE 3. (JA) vs. Copper (1 ounce) Area for the TO- 263 Package 1 TO-263 PCB (JA) 32 /W Figure 4 TO-263 1 1 (JA) 35 /W (T J ) 125 TO-223 SOT-223 ("MP") PCB PCB PCB Figure 5 6 SOT-223 Figure 6 1 1 (JA) 74 /W 2 1 51 /W (T A ) 85 (T J ) 125 SOT-223 AN- 1028 FIGURE 5. (JA) vs. Copper (2 ounce) Area for the SOT-223 Package 14
( ) LLP LLP JA PCB 6 LLP AN-1187 LM2940/LM2940C FIGURE 6. Maximum Power Dissipation vs. T A for the SOT-223 Package 15
LM2940/LM2940C millimeters 3-Lead SOT-223 Package NS Package Number MP04A 3-Lead TO-220 Plastic Package (T) NS Package Number TO3B 16
inches (millimeters) ( ) LM2940/LM2940C 3-Lead TO-263 Surface Mount Package (MP) NS Package Number TS3B 8-Lead LLP Order Number LM2940LD-5.0, LM2940LD-8.0, LM2940LD-9.0, LM2940LD-10, LM2940LD-12 or LM2940LD-15 NS Package Number LDC08A millimeters 17
LM2940/LM2940C 1A 3 (CEO) (GENERAL COUNSEL) a (b) National Semiconductor Copyright 2007 National Semiconductor Corporation www.national.com 135-0042 2-17-16 / TEL.(03)5639-7300
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