TS2596 3A / 150KHz Buck Dc-Dc Converter TO-220-5L TO-263-5L Pin Definition: 2 (D PAK) 1. Input 2. SW Output 3. Ground 4. Feedback 5. Enable General Description The TS2596 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 an adjustable output version. The TS2596 series operates at a switching frequency of 150kHz 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 100 A (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~38.5V TS2596CZ5xx C0 TO-220-5L 50pcs / Tube 150KHz fixed switching frequency TS2596CM5xx 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) Operating Voltage Can be up to 40V Application Output Load Current 3A Simple High-efficiency Step down Regulator Low Power Standby Mode On-Card Switching Regulators Built-in switching transistor on chip Positive to Negative Converter 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 +40 V SW EN Feedback Pin Voltage V -0.3 to +12 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 1/9 Version: E13 TS2596 3A / 150KHz Buck Dc-Dc Converter 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 50 o Thermal Resistance* (Junction to Ambient) C/W JA TO-263-5L 50 2 Note: is measured with the PCB copper area (need connect to GROUND pins) of approximately 1.5 in (Multi- JA layer) Electrical Specifications (All Output Voltage Version) o (Ta = 25 C unless otherwise noted, V =12V for 3.3V, 5V, Adjustable version. I =0.3A) 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 0.2A I 3A 3.3V 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 -- 80 -- % IN LOAD Feedback Bias Current I V =1.3V (Adj version only) -- 10 100 nA FB FB Oscillator Frequency F 127 150 173 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 3.3 -- -- A CL V =0V force driver on FB Oscillator Frequency of Short Circuit When current limit occurred and F 110 150 173 KHz SCP o Protect V <0.5V, Ta = 25 C FB I =3A, No outside circuit OUT Saturation Voltage V -- 1.15 1.50 V SAT V =0V force driver on FB ON/OFF Pin Logic Input Threshold V Low (regulator ON) -- 0.6 IL 1.3 V Voltage V High (regulator OFF) 2.0 -- IH I V =2.5V (OFF) -- 5 15 H LOGIC ON/OFF Pin Logic Input Current A I V =0.5V (ON) -- 0.02 5 L LOGIC Maximum Duty Cycle (ON) V =0V force driver on -- 100 -- 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 80 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 FB SWL Current SW pin = -1 V =12V -- 7.5 30 mA IN 2/9 Version: E13