TS2576 3A / 52KHz Buck Switching Regulator TO-220-5L TO-263-5L Pin Definition: 2 (D PAK) 1. Input 2. SW Output 3. Ground 4. Feedback 5. Enable General Description TS2576 Series are step-down switching regulators with all required active functions. It is capable of driving 3A load with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V and adjustable output version. TS2576 series operates at a switching frequency of 52kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. It substantially not only reduces the area of board size but also the size of heat sink, and in some cases no heat sink is required. The 4% tolerance on output voltage within specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency accuracy is within 10%. External shutdown is included. Featuring 70A (typical) standby current. The output switch includes cycle-by- cycle current limiting, as well as thermal shutdown for full protection under fault conditions. Features Ordering Information Output Voltage: 3.3V, 5V & Adjustable version Part No. Package Packing Adjustable Output Voltage Range 1.23V~37V 4% TS2576CZ5xx C0 TO-220-5L 50pcs / Tube 52kHz fixed switching frequency TS2576CM5xx RN TO-263-5L 800pcs / 13 Reel Voltage Mode Non-synchronous PWM control Note: Where xx denotes voltage option, available are Thermal Shutdown and Current Limit Protection 50= 5.0V ON/OFF Shutdown Control Input 33= 3.3V High Efficiency Leave blank for adjustable version Short Circuit Protect (SCP) Application Operating Voltage Can be up to 40V Simple High-efficiency Step down Regulator Output Load Current 3A On-Card Switching Regulators Low Power Standby Mode Positive to Negative Converter P+ Product Enhancement Tested Absolute Maximum Rating Parameter Symbol Limit Unit Maximum Supply Voltage V +45 V CC Recommend Operating Supply Voltage V 4.5 to 40 V OP SW, EN Pin Input Voltage V , V -0.3 to +25 V SW EN Feedback Pin Voltage V -0.3 to +25 V FB Power Dissipation P Internally Limited W D Output Voltage to Ground V -1 V OUT o Storage Temperature Range T -65 to +150 C ST o Operating Temperature Range T -40 to +125 C OP ESD Susceptibility (HBM) 2 kV 1/8 Version: B07 TS2576 3A / 52KHz Buck Switching Regulator Thermal Information Parameter Symbol Maximum Unit TO-220-5L 2 o Thermal Resistance (Junction to Case) C/W JC TO-263-5L 2 TO-220-5L 65 (note 1) o Thermal Resistance (Junction to Ambient) C/W JA TO-263-5L 50 (note 2) Note1: is measured on the PCB with minimum copper area. JA 2 Note2: is measured with the PCB copper area (need connect to GROUND pins) of approximately 0.5 in JA Electrical Specifications (All Output Voltage Version) o (Ta = 25 C unless otherwise noted, V =12V for 3.3V, 5V, Adjustable version. I =0.5A) IN LOAD Parameter Symbol Test Condition Min Typ Max Unit 4.5V V 40V IN Output Feedback V 1.180 1.23 1.280 V FB ADJ 0.2A I 3A LOAD Efficiency V =12V, I =3A, V =5V -- 77 -- % IN LOAD OUT 4.75V V 40V IN Output Feedback V 3.135 3.3V 3.465 V FB 3.3V 0.2A I 3A LOAD Efficiency V =12V, I =3A -- 75 -- % IN LOAD 7V V 40V IN Output Feedback V 4.75 5 5.25 V FB 5V 0.2A I 3A LOAD Efficiency V =12V, I =3A -- 77 -- % IN LOAD Feedback Bias Current I V = 5V (Adjustable Version) -- 50 100 nA FB OUT Oscillator Frequency F 47 52 58 KHz OSC Soft-Start Time T Rising edge of EN on to I -- 3 -- mS SS CL Pear Current, no outside circuit Current Limit I 5.9 -- -- A CL V =0V force driver on FB I =3A, No outside circuit OUT Saturation Voltage V -- 1.4 1.8 V SAT V =0V force driver on FB ON/OFF Pin Logic Input Threshold V Low (regulator ON) -- 1.2 1.0 IL V Voltage V High (regulator OFF) 2.2 1.4 -- IH I V =5V (OFF) -- 12 30 L LOGIC ON/OFF Pin Logic Input Current A I V =0V (ON) -- 0 10 H LOGIC Maximum Duty Cycle (ON) V =0V force driver on 93 98 -- FB DC % Maximum Duty Cycle (OFF) V =12V force driver off -- 0 -- FB Quiescent Current I V =12V force driver off -- 5 10 mA Q FB ON/OFF pin=5V -- 200 Standby Quiescent Current I 70 A STBY V =40V -- 250 IN No outside circuit, SW Pin Leakage SW pin = 0 -- 0.3 2 mA I V =12V force driver off SWL FB Current SW pin = -1 V =12V -- 7.5 30 mA IN 2/8 Version: B07