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| NIKO-SEM 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) N2576G-5 TO-220, TO263 Lead-Free GENERAL DESCRIPTION The N2576 Series switching voltage regulators (SVR) are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, B o t h s e r ie s a r e c a p a b l e o f d r i v i n g 3 A load respectively with excellent line and load regulation. The N2576 Series SVR include a switching regulator and compensation network all within the same package. Just add a choke, catch diode and two capacitors to obtain an efficient DC-to-DC converter. The output switch includes cycle-by-cycle current limit -ing, as well as thermal shutdown for full protection under fault conditions. The N2576 Series SVR offer replacement for popular 3 terminal linear regulators by providing higher efficiency with reduced heat sink size. In many applications a heat sink will not be required. FEATURES Pin compatible with industry products of LM2576 Series Fixed 5V output version Wide output voltage range, 1.23V to 27V for adjustable output version DC-to-DC buck converter requiring only 4 external parts 52 KHz fixed frequency internal oscillator TTL shutdown capability, low power stand -by mode High efficiency Uses readily available standard inductors APPLICATIONS Simple high-efficiency step-down (buck) regulator Positive to negative converter (Inverting Buck-Boost) Isolated Fly back Converter using minimum number of external parts Powering portable instrument, Set-Top Box, LCD Monitor, Scanner, I.A, Easy PC SMPS Post-Regulator TYPICAL APPLICATION 8V - 27V Unregulated DC Input +Vin 3 Gnd Cin 100uF + D1 1N5822 4 1 N2576 2 5 On/Off Feedback Output L1 100uH +5V, 3A Regulated Output + Cout 1000uF 1 MAY-21-2004 NIKO-SEM 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) N2576G-5 TO-220, TO263 Lead-Free ABSOLUTE MAXIMUM RATINGS Maximum Supply Voltage ON/OFF Pin Input Voltage Output Voltage to Ground (Stead State) Power Dissipation Thermal Resistance Junction to Case, JC 30V -0.3V+VI -1V Internally Limited 2.0C/W Thermal Resistance Junction to Ambient, JA TO-220 TO-263 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Seconds) 50C/W 60C/W -40 to 125C -65 to 150C 260C ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25C.) Parameter Output Voltage Output Voltage Efficiency Oscillator Frequency Saturation Voltage Current Limit ON/OFF Pin Logic Input Level ON/OFF Pin Logic Input Current Symbol VOUT VOUT b FOSC VSAT ICL VIH VIL IIH IIL IOUT = 3A VOUT = 0V VOUT = Nominal Output Voltage ON/OFF Pin = 5V (OFF) ON/OFF Pin = 0V (ON) Test Conditions VIN = 12V ILOAD = 0.5A 8V VIN 27V 0.5A ILOAD 3A VIN = 12V, VOUT = 3.3V IOUT = 3A Typical 5V 5V 77% 52 KHz 1.4V 6.0A 1.4V 1.2V 12A 0A 47 KHz (Min) 58 KHz (Max) 1.8VMax 4.0A ~ 7.0A 2.2V (Min) 1.0V (Max) 30A (Max) 10A (Max) Limits 4.9VMin 5.1VMax 4.8VMin 5.2VMax REMARK: Orders for parts with Lead-Free plating can be placed using the N2576XG-5 parts name. 2 MAY-21-2004 NIKO-SEM 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) N2576G-5 TO-220, TO263 Lead-Free DEVICE SELECTION GUIDE Device Voltage (V) Current (A) Package Marking TO-263 N2576SG-5 N2576SG-5 5 3 TO-220 N2576TG-5 N2576TG-5 PIN CONFIGURATIONS 5 -LEAD TO-220 (T) 5 - On/Off Ground 4 - Feedback 3 - Ground 2 - Output 1 - Vin 5 -LEAD TO-263 (S) 5 - On/Off Ground 4 - Feedback 3 - Ground 2 - Output 1 - Vin 3 MAY-21-2004 NIKO-SEM 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) N2576G-5 TO-220, TO263 Lead-Free TO-220 (5-Lead) MECHANICAL DATA mm Dimension A B C D E F G 28.5 14.6 8.4 0.73 28.9 15.0 8.8 0.83 29.3 15.4 9.2 0.93 Min. 9.78 2.61 Typ. 10.16 2.74 Max. 10.54 2.87 Dimension H I J K L M N 4.4 1.14 2.3 0.26 Min. 1.57 mm Typ. 1.7 6.81 4.6 1.27 2.6 0.46 7 4.8 1.4 2.9 0.66 Max. 1.83 4 MAY-21-2004 NIKO-SEM 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) N2576G-5 TO-220, TO263 Lead-Free TO-263 (D2PAK, 5-Lead) MECHANICAL DATA mm Dimension A B C D E F G 0.3 -0.102 8.5 9 Min. 14.5 4.2 1.20 2.8 0.4 0.5 0.203 9.5 Typ. 15 Max. 15.8 4.7 1.35 Dimension H I J K L M N 0.7 1.57 Min. 1.0 9.8 6.5 1.5 0.85 1.7 1.0 1.83 mm Typ. 1.5 Max. 1.8 10.3 5 MAY-21-2004 |
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