SIMPLE SWITCHER 1A LM2575 ( ) 1A 3.3V 5V 12V 15V LM2575 3 LM2575 4 10 50 A ( ) ( ) ( ) Note: TO-220 SIMPLE SWITCHER SIMPLE SWITCHER 1A Step-Down Voltage Regulator LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator LM1575 19920701 33220 24060 11800 ds011475 2004 8 changed Inductor selection guide to initial caps to meet NSC specs for relesae to the web. - vee composed after fixing a typo for TO-263. SN Converted to nat2000 DTD fix the PID segment. CN Mil-Aero: Removed TO-3 package thermal data from ElecChar table. Edited Note NS1051 to remove K & HVK, & add J version. Added J16A fig entity, removed K04A fig entity. Updated mech dwg for new J pkg, removal of K pkg. Removed LM1575HV throughout. WG Mil-Aero: Moved Connex diag & Order table to front of datasheet; added J16 text, removed TO-3 text. WG SGMLFIX: PR1.doc Fixed (cam) SGMLFIX: PR4.doc Fixed (cam) SGMLFIX: PR8.doc Fixed (cam) SGMLFIX: PR16.doc Fixed (cam) 3.3V 5V 12V 15V 1.23V 37V(HV 57V) 4 1A 40V HV 60V 4 52kHz TTL ( ) ( ) 20040126 LM1575/ SIMPLE SWITCHER 1A National Semiconductor Corporation DS011475-08-JP 1
3.3V, R2 1.7k 5V, R2 3.1k 12V, R2 8.84k 15V, R2 11.3k For ADJ. Version R1 Open, R2 0 Note: TO-220 FIGURE 1. (XX ) Straight Leads 5 Lead TO-220 (T) Bent, Staggered Leads 5-Lead TO-220 (T) Top View LM2575T-XX or LM2575HVT-XX See NS Package Number T05A Top View Side View LM2575T-XX Flow LB03 or LM2575HVT-XX Flow LB03 See NS Package Number T05D 2
(XX )( ) 16 Lead DIP (N) 24-Lead Surface Mount (M) *No Internal Connection Top View LM2575N-XX or LM2575HVN-XX See NS Package Number N16A *No Internal Connection Top View LM2575M-XX or LM2575HVM-XX See NS Package Number M24B TO-263(S) 5-Lead Surface-Mount Package Top View Side View LM2575S-XX or LM2575HVS-XX See NS Package Number TS5B 3
( ) 4
(Note 1) LM2575 45V LM2575HV 63V ON/OFF 0.3V V V IN ( ) 1V 65 150 150 ESD (C 100pF R 1.5k ) 2 kv ( 10 ) 260 40 T J 125 LM2575 40V LM2575HV 60V LM2575-3.3 LM2575HV-3.3 T J 25 LM2575-5.0 LM2575HV-5.0 T J 25 5
LM2575-5.0 LM2575HV-5.0 ( ) T J 25 LM2575-12 LM2575HV-12 T J 25 LM2575-15 LM2575HV-15 T J 25 6
LM2575-ADJ LM2575HV-ADJ T J 25 T J 25 3.3V 5V V IN 12V 12V V IN 25V 15V V IN 30V I LOAD 200mA 7
( ) T J 25 3.3V 5V V IN 12V 12V V IN 25V 15V V IN 30V I LOAD 200mA Note 1: IC IC Note 2: ( ) Note 3: ( ) ( ) 100 (SQC) Note 4: LM2575 Figure 2 System Parameters Note 5: ( 2) Note 6: ( 4) 0V Note 7: ( 4) /3.3V/5V 12V 12V/15V 25V Note 8: V IN 40V (HV 60V) Note 9: 5 TO-220 ( ) IC 1/2 Note 10: 5 TO-220 ( ) 4 1/4 Note 11: 1 PC Switchers Made Simple Note 12: TO-263 PC 0.5 JA 50 /W 1 JA 37 /W 1.6 JA 32 /W Note 13: 18kHz 40 5 2 Note 14: ( ) 8
(Figure 2 ) Normalized Output Voltage Line Regulation Dropout Voltage Current Limit Quiescent Current Standby Quiescent Current 9
(Figure 2 )( ) Oscillator Frequency Switch Saturation Voltage Efficiency Minimum Operating Voltage Quiescent Current vs Duty Cycle Feedback Voltage vs Duty Cycle 10
(Figure 2 )( ) Feedback Pin Current Maximum Power Dissipation (TO-263) (See (Note 12)) Switching Waveforms Load Transient Response V OUT 5V A: Output Pin Voltage, 10V/div B: Output Pin Current, 1A/div C: Inductor Current, 0.5A/div D: Output Ripple Voltage, 20 mv/div, AC-Coupled Horizontal Time Base: 5 s/div ( ) 11
(Figure 2 )( ) Fixed Output Voltage Versions C IN 100 F, 75V, Aluminum Electrolytic C OUT 330 F, 25V, Aluminum Electrolytic D1 Schottky, 11DQ06 L1 330 H, PE-52627 (for 5V in, 3.3V out, use 100 H, PE-92108) Adjustable Output Voltage Version V REF 1.23V R1 1k 5k R1 2k, 0.1% R2 6.12k, 0.1% Note: TO-220 FIGURE 2. 12
LM2575 ( ) [ ] ( ) [ ] ( ) : VOUT (3.3V 5V 12V 15V) V IN (Max) I LOAD (Max) : VOUT 5V V IN (Max) 20V I LOAD (Max) 0.8A 1. (L1) 1. (L1) A. Figure 3 4 5 6 ( 3.3V 5V 12V 15V) B. V IN (Max) I LOAD (Max) C. Figure 9 3 LM2575 (52kHz) 1.15 I LOAD A. Figure 4 B. 20V 0.8A L330 C. 330 H Figure 9 AIE 415-0926 Pulse Engineering PE-52627 Renco Electronics Incorporated RL-1952 2. (C OUT ) A. ( 1 ) 100 F 470 F B. 1.5 5V 8V 10V 15V ESR 2. (C OUT ) A. C OUT 100 F 470 F B. 20V 3. (D1) A. 1.2 LM2575 B. 1.25 4. (C IN ) 3. (D1) A. 1A B. 30V 1N5818 SR103 Figure 8 4. (C IN ) 47 F 25V 13
( ) FIGURE 3. LM2575(HV)-3.3 FIGURE 5. LM2575(HV)-12 FIGURE 4. LM2575(HV)-5.0 FIGURE 6. LM2575(HV)-15 FIGURE 7. LM2575(HV)-ADJ 14
( )( ) [ ] ( ) [ ] ( ) : : V OUT V IN (Max) I LOAD (Max) F (52kHz ) V OUT 10V V IN (Max) 25V I LOAD (Max) 1A F 52 khz 1. (R1 R2 Figure 2 ) 1. (R1 R2 ) R 1 1k 5k ( 1 ) R2 1k (8.13 1) 7.13k 1 7.15k 2. (L1) A. E T(V s) 2. (L1) A. E T(V s) B. E T Figure 7 E T C. D. E T E. Figure 9 3 LM2575 (52kHz) 1.15 I LOAD B. E T 115 V s C. I LOAD (Max) 1A D. H470 E. 470 H AIE 430-0634 Pulse Engineering PE-53118 Renco RL-1961 3. (C OUT ) A. 3. (C OUT ) 10 F 2000 F ( 1 ) B. 1.5 10V 15V ESR C OUT 220 F C OUT 220 F 15
( )( ) [ ] ( ) ( ) [ ] ( ) ( ) 4. (D1) 4. (D1) A. A. 3A 1.2 B. 40V MBR340 31DQ04 Figure 8 LM2575 Figure 8 B. 1.25 5. (C IN ) 5. (C IN ) 100 F ( ) SIMPLE SWITCHER IBM Switchers Made Simple ( 3.3) (3.5 ) power.national.com/jpn 16
( )( ) FIGURE 8. Diode Selection Guide Note 15: Schott Corp., (612) 475-1173, 1000 Parkers Lake Rd., Wayzata, MN 55391. Note 16: Pulse Engineering, (619) 674-8100, P.O. Box 12236, San Diego, CA 92112. Note 17: Renco Electronics Inc., (516) 586-5566, 60 Jeffryn Blvd. East, Deer Park, NY 11729. FIGURE 9. Inductor Selection by Manufacturer's Part Number 17
(C IN ) 47 F 25 ESR ( ) RMS 2 2 LM2575( ) Figure 3 Figure 7 ( ) DC 20 30 ( ) ( ) ( 200mA ) Switchers Made Simple ( 3.3) ( ) E (EMI) EMI AIE Renco ( DC ) SIMPLE SWITCHER / / DC DC ( ) ( ) LM2575 ESR ESR (12V ) ESR ESR ( I IND ) (220 F 680 F) 50mV 150mV( ) 20mV 50mV ( I IND ) ( ESR ) ESR 10mV 20mV ESR 0.05 18
( ) ESR 10 20 52kHz 50 ( ) 1 LM2575 5V ( ) ( ) EMI ( ) (1N4001 1N5400 ) Figure 8 ( 1 ) ESR ( ) LC (20 H 100 F) (Figure 15 ) 1/10 ON/OFF ON/OFF L TTL ( 1.6V ) H TTL CMOS ON/OFF V IN (Figure 2 ) 5 TO- 220 3 N M / LM2575 1. ( ) 2. ( ) 3. (LM2575 125 ) 15 4. LM2575 JA JC LM2575 P D (V IN ) (I Q ) (V O /V IN ) (I LOAD ) (V SAT ) I Q ( ) V SAT V IN V O I LOAD T J (P D ) ( JA ) T J T J T A LM2575( ) LM2575 100k 3 T J (P D ) ( JC interface Heat sink ) T J T A T J ( ) 19
( ) DIP(N) (M) LM2575 IC SO 40 /W N 30 /W Switchers Made Simple ( 3.3) ( ) ( ) ( ) ( ) 1.5A ( ) ( ) ( ) 68 H 220 H ( F) Figure 10 ( ) LM2575-12 12V 12V 12V 0.35A 4.7V f osc 52kHz ( ) V IN 12V LM2575 28V LM2575HV 48V Switchers Made Simple 3.3 FIGURE 10. Inverting Buck-Boost Develops 12V ( ) ( ) 1 ( ) Figure 11 5V 12V 12V 12V 12V ( ) (Figure 11) V IN IC 20
( ) Typical Load Current 200 ma for V IN 5.2V 500 ma for V IN 7V Note: TO-220 FIGURE 11. Negative Boost Note: Note: TO-220 FIGURE 12. Undervoltage Lockout for Buck Circuit (Figure 12 ) Figure 13 V TH V Z1 2V BE (Q1) ( ) ON/OFF (Figure 14 ) 20V 10msec RC RC ON/OFF 60Hz ( ) 120Hz Note: (Figure 10 ) Note: TO-220 FIGURE 13. Undervoltage Lockout for Buck-Boost Circuit Figure 15 1A L-C 1/10 Note: Note: TO-220 FIGURE 14. Delayed Startup 21
( ) Note: TO-220 FIGURE 15. 1.2V to 55V Adjustable 1A Power Supply with Low Output Ripple 1 ( ) LM2575 SW ( ) (ESR) (Figure 16 ) ESR ESR FIGURE 16. Simple Model of a Real Capacitor 100 F 1000 F ESR 0.5 0.1 ( ESR ) 0.15 (ESL) (Figure 16 ) ( ) AC ESR ( I IND ) RMS ( ) (I STBY ) (ON/OFF H TTL ) LM2575 ( I IND ) ( ) 22
( ) / DC (E T op ) ( ) E T op 23
inches (millimeters) 14-Lead Wide Surface Mount (WM) Order Number LM2575M-5.0, LM2575HVM-5.0, M2575M-12, LM2575HVM-12, LM2575M-15, LM2575HVM-15, LM2575M-ADJ or LM2575HVM-ADJ NS Package Number M24B 24
inches (millimeters) ( ) 16-Lead Molded DIP (N) Order Number LM2575N-5.0, LM2575HVN-5.0, LM2575N-12, LM2575HVN-12, LM2575N-15, LM2575HVN-15, LM2575N-ADJ or LM2575HVN-ADJ NS Package Number N16A 5-Lead TO-220 (T) Order Number LM2575T-3.3, LM2575HVT-3.3, LM2575T-5.0, LM2575HVT-5.0, LM2575T-12, LM2575HVT-12, LM2575T-15, LM2575HVT-15, LM2575T-ADJ or LM2575HVT-ADJ NS Package Number T05A 25
inches (millimeters) ( ) TO-263, Molded, 5-Lead Surface Mount Order Number LM2575S-3.3, LM2575HVS-3.3, LM2575S-5.0, LM2575HVS-5.0, LM2575S-12, LM2575HVS-12, LM2575S-15, LM2575HVS-15, LM2575S-ADJ or LM2575HVS-ADJ NS Package Number TS5B 26
inches (millimeters) ( ) Bent, Staggered 5-Lead TO-220 (T) Order Number LM2575T-3.3 Flow LB03, LM2575HVT-3.3 Flow LB03, LM2575T-5.0 Flow LB03, LM2575HVT-5.0 Flow LB03, LM2575T-12 Flow LB03, LM2575HVT-12 Flow LB03, LM2575T-15 Flow LB03, LM2575HVT-15 Flow LB03, LM2575T-ADJ Flow LB03 or LM2575HVT-ADJ Flow LB03 NS Package Number T05D SIMPLE SWITCHER 1A 1. (a) (b) 2. 135-0042 2-17-16 TEL.(03)5639-7300 / 0120-666-116