CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 1/12 150kHz, 3A PWM Buck DC/DC Converter LM2596-XXE5/F5 Description The LM2596-XXE5/F5 series of regulators are monolithic ICs that provide all active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltage of 3.3V, 5V, 12V and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixedfrequency oscillator. The LM2596-XXE5/F5 series operates at a switching frequency of 150kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in standard 5-lead TO-220 and TO-263 packages with several different lead bend options. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596-XXE5/F5 series. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring 80μA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. Features ● 3.3V, 5V, 12V, and adjustable output versions ● Adjustable version output voltage range, 1.3V to 37V±4% max over line and load conditions ● 150kHz±15% fixed switching frequency ● TTL shutdown capability ● Operating voltage can be up to 40V ● Output load current:3A ● TO220-5L and TO263-5L packages ● Low power standby mode. ● Thermal shutdown and current limit protection. ● High efficiency ● Built-in switching transistor on chip ● Requires only 4 external components ● Use readily available standard inductors Applications ● Simple high-efficiency step-down (buck) regulator. ● Positive to negative converter (Buck-Boost). ● On-card switching regulators. LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 2/12 Pin Assignment Block Diagram Ordering Information LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 3/12 Absolute Maximum Ratings (Note 1) Parameter Symbol VCC VSD VFB VOUT PD Topr Tstg VOP Supply Voltage On/Off Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Operating Temperature Storage Temperature Operating Voltage ESD Susceptibility (Note 2) Value 45 -0.3 ~ +25 -0.3 ~ +25 -1 Internally Limited -40 ~ +125 -65 ~ +150 +4.5 ~ +40 2000 Unit V V V V W ℃ ℃ V V Electrical Characteristics (All Output Voltage Versions) Specifications with boldface type are for full operating temperature range, the other type are for TJ=25°C. (Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V version, ILOAD=500mA) Parameter Symbol Test Condition Min Typ Feedback Bias Current Ib Adjustable Version Only, VFB=1.3V - 10 Oscillator Frequency fO (Note 6) 127 110 150 IOUT=3A (Note 7, 8) - 1.16 - 100 0 Max Unit Device parameters Saturation Voltage VSAT Max Duty Cycle (ON) Min Duty Cycle(OFF) DC (Note 8) (Note 9) Current Limit ICL Peak Current ( Note 7, 8) Output Leakage Current IL Output=0V (Note 7, 9) Output=-1V(Note 10) Quiescent Current IQ (Note 9) Standby Quiescent Current ISTBY TO-220-5L TO-263-5L TO-220-5L θJA (Note11) TO-263-5L θJC Thermal Resistance ON/OFF Control ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Input Current LM2596-XXE5/F5 ON/OFF pin=5V (Note 10) VIH VIL IIH IIL Junction to Case Junction to Ambient Low (Regulator ON) High (Regulator OFF) VLOGIC=2.5V (Regulator OFF) VLOGIC=0.5V (Regulator ON) 3.6 3.4 - 4.5 2 5 - 80 - 2 3.5 50 23 2.0 - 1.3 5 0.02 50 100 173 173 1.4 1.5 KHz - % 6.9 7.5 50 30 10 200 250 0.6 15 5 nA V A μA mA mA μA ℃/W ℃/W V μA CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 4/12 Electrical Characteristics (Continued) Specifications with boldface type are for full operating temperature range, the other type are for TJ=25°C. Part No. LM2596-3.3 Parameter Symbol Conditions Output Voltage VOUT 4.75V≤VIN≤40V, 0.2A≤ILOAD≤3A Efficiency LM2596-5.0 Output Voltage Efficiency LM2596-12 Output Voltage Efficiency Output LM2596-ADJ Feedback Efficiency η VOUT η VIN=12V, ILOAD=3A 7V≤VIN≤40V, 0.2A≤ILOAD≤3A VIN=12V, ILOAD=3A VOUT 15V≤VIN≤40V, 0.2A≤ILOAD≤3A η VIN=25V, ILOAD=3A 4.5V≤VIN≤40V, 0.2A≤ILOAD≤3A VOUT programmed for 3V VIN=12V, VOUT=3V, ILOAD=3A VFB η Min Typ Max (Note 3) (Note 4) 3.168 3.432 3.3 3.135 3.465 73 4.800 5.200 5.0 4.750 5.250 80 11.52 12.48 12.0 11.40 12.60 90 1.180 1.280 1.230 1.168 1.292 77 - Units V % V % V % V % Note 1 : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2 : The human body model is a 100pF capacitor discharged through a 1.5K resistor into each pin. Note 3 : Typical numbers are at 25℃ and represent the most likely norm. Note 4 : All limits guaranteed at room temperature (standard face type) and at temperature extremes(bold face type). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Note 5 : External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. Note 6 : The switching frequency is reduced when the second stage current limit is activated. Note 7 : No diode, inductor or capacitor connected to output pin. Note 8 : Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 9 : Feedback pin removed from output and connected to +12V for the 3.3V, 5V and adjustable version, and +15V for the 12V version, to force the output transistor switch OFF. Note 10 : VIN=40V. Note 11 : Junction to Ambient thermal resistance. (With copper area of approximately 3 in²) LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 5/12 Typical Performance Characteristics (circuit of Figure 2) LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 6/12 Typical Performance Characteristics(Cont.) LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 7/12 Typical Performance Characteristics(Cont.) LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 8/12 Typical Performance Characteristics(Cont.) LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 9/12 Typical Application Circuit LM2596-XXE5/F5 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 10/12 TO-263-5L Dimension Marking: Date Code LM2596□□□ □□□□ Vout: 3.3V→-33 5.0V→-50 12V→-12 ADJ→ blank Style: Pin 1.Vin 2.Vout 3.GND 4.Feedback 5.ON/OFF 5-Lead TO-220-5L Plastic Package CYStek Package Code: E5 Inches Min. Max. 0.173 0.189 0.030 0.039 0.014 0.020 0.339 0.354 0.386 0.409 0.579 0.602 DIM A b c D E L4 Millimeters Min. Max. 4.40 4.80 0.76 1.00 0.36 0.50 8.60 9.00 9.80 10.4 14.7 15.3 DIM L5 c1 L e L1 φ Inches Min. Max. 0.244 0.260 0.049 0.057 0.522 0.561 0.067 REF 0.102 0.114 0.146 0.156 Millimeters Min. Max. 6.20 6.60 1.25 1.45 13.25 14.25 1.70 REF 2.60 2.89 3.71 3.96 Notes: 1.Controlling dimension: millimeter 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 LM2596-XXE5/F5 CYStek Product Specification Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 11/12 CYStech Electronics Corp. TO-263-5L Dimension Marking: LM2596□□□ Date Code □□□□ Vout: 3.3V→-33 5.0V→-50 12V→-12 ADJ→ blank Style: Pin 1.Vin 2.Vout 3.GND 4.Feedback 5.ON/OFF 5-Lead TO-263-5L Plastic Package CYStek Package Code: F5 Inches Min. Max. 0.173 0.189 0.026 0.036 0.000 0.012 0.014 0.020 0.090 0.110 0.386 0.409 DIM A b L4 c L1 E Millimeters Min. Max. 4.40 4.80 0.66 0.91 0.00 0.30 0.36 0.50 2.29 2.79 9.80 10.4 DIM c2 L2 D e L θ Inches Min. Max. 0.049 0.057 0.050 REF 0.339 0.354 0.067 REF 0.575 0.622 0° 8° Millimeters Min. Max. 1.25 1.45 1.27 REF 8.60 9.00 1.70 REF 14.6 15.8 0° 8° Notes: 1.Controlling dimension :millimeter 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 Recommended wave soldering condition Product Pb-free devices LM2596-XXE5/F5 Peak Temperature 260 +0/-5 °C Soldering Time 5 +1/-1 seconds CYStek Product Specification CYStech Electronics Corp. Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 12/12 Recommended temperature profile for IR reflow Profile feature Average ramp-up rate (Tsmax to Tp) Preheat −Temperature Min(TS min) −Temperature Max(TS max) −Time(ts min to ts max) Time maintained above: −Temperature (TL) − Time (tL) Peak Temperature(TP) Time within 5°C of actual peak temperature(tp) Ramp down rate Time 25 °C to peak temperature Sn-Pb eutectic Assembly Pb-free Assembly 3°C/second max. 3°C/second max. 100°C 150°C 60-120 seconds 150°C 200°C 60-180 seconds 183°C 60-150 seconds 240 +0/-5 °C 217°C 60-150 seconds 260 +0/-5 °C 10-30 seconds 20-40 seconds 6°C/second max. 6 minutes max. 6°C/second max. 8 minutes max. Note : All temperatures refer to topside of the package, measured on the package body surface. Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. LM2596-XXE5/F5 CYStek Product Specification