52 KHz 3A Step-Down Switching Voltage Regulator (SVR) NIKO-SEM N2576G-5 TO-220, TO263 Lead-Free GENERAL DESCRIPTION FEATURES 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. z Pin compatible with industry products of LM2576 Series z Fixed 5V output version z Wide output voltage range, 1.23V to 27V for adjustable output version z DC-to-DC buck converter requiring only 4 external parts z 52 KHz fixed frequency internal oscillator z TTL shutdown capability, low power stand -by mode z High efficiency z Uses readily available standard inductors APPLICATIONS z Simple high-efficiency step-down (buck) regulator z Positive to negative converter (Inverting Buck-Boost) z Isolated Fly back Converter using minimum number of external parts z Powering portable instrument, Set-Top Box, LCD Monitor, Scanner, I.A, Easy PC z SMPS Post-Regulator TYPICAL APPLICATION 8V - 27V Unregulated DC Input 4 Feedback +5V, 3A Regulated Output 1 +Vin N2576 Output L1 2 3 Gnd Cin 100uF 100uH 5 On/Off + + D1 1N5822 1 Cout 1000uF MAY-21-2004 NIKO-SEM N2576G-5 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) TO-220, TO263 Lead-Free ABSOLUTE MAXIMUM RATINGS z Maximum Supply Voltage z Thermal Resistance Junction to Ambient, θJA TO-220 TO-263 z Operating Junction Temperature Range z Storage Temperature Range z Lead Temperature (Soldering, 10 Seconds) 30V z ON/OFF Pin Input Voltage -0.3≤V≤+VI z Output Voltage to Ground (Stead State) -1V Internally Limited z Power Dissipation z Thermal Resistance Junction to Case, θJC 2.0°C/W 50°C/W 60°C/W -40 to 125°C -65 to 150°C 260°C ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25°C.) Parameter Symbol Test Conditions Typical Limits Output Voltage VOUT VIN = 12V ILOAD = 0.5A 5V Output Voltage VOUT 8V ≤ VIN ≤ 27V 0.5A ≤ ILOAD ≤ 3A 4.9VMin 5.1VMax 5V 4.8VMin 5.2VMax Efficiency Oscillator Frequency Saturation Voltage Current Limit ON/OFF Pin Logic Input Level ON/OFF Pin Logic Input Current η VIN = 12V, VOUT = 3.3V IOUT = 3A 52 KHz FOSC VSAT ICL VIH VIL IIH IIL 77% IOUT = 3A VOUT = 0V VOUT = Nominal Output Voltage ON/OFF Pin = 5V (OFF) ON/OFF Pin = 0V (ON) 1.4V 6.0A 1.4V 1.2V 12µA 0µA 47 KHz (Min) 58 KHz (Max) 1.8VMax 4.0A ~ 7.0A 2.2V (Min) 1.0V (Max) 30µA (Max) 10µA (Max) 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 N2576SG-5 N2576TG-5 Voltage (V) 5 Current (A) 3 Package TO-263 TO-220 Marking N2576SG-5 N2576TG-5 PIN CONFIGURATIONS 5 -LEAD TO-220 (T) Ground 5 - On/Off 4 - Feedback 3 - Ground 2 - Output 1 - Vin 5 -LEAD TO-263 (S) Ground 5 - On/Off 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 mm Dimension Min. Typ. Max. A 9.78 10.16 10.54 H B 2.61 2.74 2.87 I C Min. Typ. Max. 1.57 1.7 1.83 6.81 J 4.4 4.6 4.8 D 28.5 28.9 29.3 K 1.14 1.27 1.4 E 14.6 15.0 15.4 L 2.3 2.6 2.9 F 8.4 8.8 9.2 M 0.26 0.46 0.66 G 0.73 0.83 0.93 N 4 7° 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 mm Min. Typ. Max. A 14.5 15 15.8 B 4.2 C 1.20 D Dimension Min. Typ. Max. H 1.0 1.5 1.8 4.7 I 9.8 1.35 J 6.5 K 1.5 2.8 E 0.3 F -0.102 G 8.5 0.4 9 10.3 0.5 L 0.7 0.85 1.0 0.203 M 1.57 1.7 1.83 9.5 N 5 MAY-21-2004