NIKO-SEM
150 KHz 3A Step-Down Switching Voltage Regulator (SVR)
FEATURES
N2596G
TO-263, TO220
GENERAL DESCRIPTION
T he N2596 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 i e s a r e c a pa b l e o f d r i v i n g 3 A load respectively with excellent line and load regulation. The N2596 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 N2596 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.
Pin compatible with industry products of LM2596 Series Adjustable output versions Wide output voltage range, 1.23V to 27V for adjustable output version DC-to-DC buck converter requiring only 4 external parts
150 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 4 1 N2596 2 Output L1 Feedback +5V, 3A Regulated Output
3 Gnd Cin 100uF +
5 On/Off D1
47uH + Cout 1N5822
R1 6.18K R2 1000uF 2K
* VOUT = 1.23V ( 1 + R1 / R2) Adjustable Regulator in Fixed Output Application
1
SEP-14-2004
NIKO-SEM
150 KHz 3A Step-Down Switching Voltage Regulator (SVR)
N2596G
TO-263, TO220
ABSOLUTE MAXIMUM RATINGS
Maximum Supply Voltage ON/OFF Pin Input Voltage Output Voltage to Ground (Stead State) Power Dissipation Thermal Resistance Junction to Case, θJC 30V -0.3≤V≤+VI -1V Internally Limited 2.0°C/W Thermal Resistance Junction to Ambient, θJA TO-220 TO-263 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Seconds)
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 Feedback Voltage Feedback Voltage Efficiency Symbol VOUT VOUT η Test Conditions VIN = 12V, VOUT = 5V ILOAD = 0.5A 8V ≤ VIN ≤ 27V 0.5A ≤ ILOAD ≤ 3A VIN = 12V, VOUT = 5V IOUT = 3A VOUT = 5V Typical 1.230V 1.230V 77% 50nA 150KHz 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 100nA 127KHz (Min) 173KHz (Max) 1.8VMax 4.0A ~ 7.0A 2.2V (Min) 1.0V (Max) 30µA (Max) 10µA (Max) Limits 1.217VMin 1.243VMax 1.193VMin 1.267VMax
Feedback Bias IB Current Oscillator FOSC Frequency Saturation Voltage VSAT Current Limit ICL ON/OFF Pin Logic VIH Input Level VIL ON/OFF Pin Logic IIH Input Current IIL
REMARK: Orders for parts with Lead-Free plating can be placed using the N2596XG parts name.
DEVICE SELECTION GUIDE
Device Voltage (V) Current (A) Package TO-263
N2596SG N2596TG
ADJ 3
ADJ TO-220
2
SEP-14-2004
NIKO-SEM
150 KHz 3A Step-Down Switching Voltage Regulator (SVR)
N2596G
TO-263, TO220
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
SEP-14-2004
NIKO-SEM
150 KHz 3A Step-Down Switching Voltage Regulator (SVR) TO-220 (5-Lead) MECHANICAL DATA
mm
N2596G
TO-263, TO220
mm Max. 10.54 2.87 29.3 15.4 9.2 0.93 Dimension H I J 4.4 1.14 2.3 0.26 K L M N Min. 1.57 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
Dimension A B C D E F G
Min. 9.78 2.61 28.5 14.6 8.4 0.73
Typ. 10.16 2.74 28.9 15.0 8.8 0.83
4
SEP-14-2004
NIKO-SEM
150 KHz 3A Step-Down Switching Voltage Regulator (SVR)
N2596G
TO-263, TO220
TO-263 (D2PAK, 5-Lead) MECHANICAL DATA
mm Dimension A B C D E F G 0.356 -0.102 8.636 9 Min. 15.11 4.0 1.142 2.8 0.639 0.203 9.65 Typ. Max. 15.47 4.8 1.4 Dimension H I J K L M N 0.762 0.98 Min. 1.0 9.78 6.6 1.5 1.01 1.05 mm Typ. Max. 1.4 10.54 7.11
5
SEP-14-2004
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