TS2596S Taiwan Semiconductor 2A, 24V, 150kHz Step-Down DC-DC Converter DESCRIPTION FEATURES TS2596S Series are step-down switching regulators Output Voltage: 5V & Adjustable version with all required active functions. It is capable of driving Adjustable Output Voltage 1.23V~19.5V 4% 2A load with excellent line and load regulations. These 150kHz 15% fixed switching frequency devices are available in fixed output voltages of 5V, Voltage Mode Non-synchronous PWM control and an adjustable output version. TS2596S series Thermal Shutdown and Current Limit Protection operates at a switching frequency of 150kHz thus ON/OFF Shutdown Control Input allowing smaller sized filter components than what Soft-Start (SS) Function would be needed with lower frequency switching Short Circuit Protect (SCP) regulators. It substantially not only reduces the area of Operating Voltage Can be up to 24V board size but also the size of heat sink, and in some Output Load Current 2A cases no heat sink is required. The 4% tolerance on Low Power Standby Mode output voltage within specified input voltages and output load conditions is guaranteed. Also, the APPLICATION oscillator frequency accuracy is within 10%. External Simple High-efficiency Step down Regulator shutdown is included. Featuring 70A (typical) standby On-Card Switching Regulators current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. SOP-8 Pin Definition: 1. Input 8. GND 2. SW Output 7. GND 3. Feedback 6. GND 4. Enable 5. GND Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020 (Note 1) ABSOLUTE MAXIMUM RATINGS (T = 25C unless otherwise specified) A PARAMETER SYMBOL LIMIT UNIT Supply Voltage V +28 V CC Operating Voltage Range V +4.5 to +24 V OP SW, EN Pin Input Voltage V , V -0.3 to V V SW EN CC Feedback Pin Voltage V -0.3 to V V FB CC 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 (Note 3) THERMAL PERFORMANCE PARAMETER SYMBOL LIMIT UNIT Thermal Resistance Junction to Case R 15 C/W JC Thermal Resistance Junction to Ambient R 70 C/W JA 1 Version: C1602 TS2596S Taiwan Semiconductor ELECTRICAL SPECIFICATIONS (T = 25C unless otherwise specified) A PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT 4.5V V 24V 1.193 1.267 IN Output Feedback V 1.23 V FB ADJ 0.2A I 2A 1.180 1.280 LOAD Efficiency V =12V, I =2A 76 -- -- % IN LOAD 7V V 24V 4..80 5.20 IN Output Feedback V 5 V FB 5V 0.2A I 2A 4.75 5.25 LOAD Efficiency V =12V, I =2A 84 -- -- % 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 2.4 -- -- A CL V =0V force driver on FB Oscillator Frequency of Short When current limit occurred and F -- 60 -- kHz SCP o Circuit Protect V <0.5V, T = 25 C FB A I =2A, No outside circuit OUT Saturation Voltage V -- 1.15 1.50 V SAT V =0V force driver on FB ON/OFF Pin Logic Input V Low (regulator ON) -- 0.6 IL 1.3 V Threshold Voltage V High (regulator OFF) 2.0 -- IH ON/OFF Pin Logic Input I V =2.5V (OFF) -- -0.1 -0.5 L LOGIC A Current I V =0.5V (ON) -- -- -0.01 H 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 -- 4 8 mA Q FB ON/OFF pin=5V -- 100 Standby Quiescent Current I 45 A STBY V =24V -- 100 IN No outside circuit, SW Pin Leakage SW = 0 -- -- -200 A V =12V force driver off I SWL FB Current SW = -1 V =24V -- -5 -- mA IN Note: 1. Stresses listed as the above Absolute Maximum Ratings may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. 2. Devices are ESD sensitive. Handing precaution recommended. 3. Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test board in free air at T =25C. A ORDERING INFORMATION OUTPUT VOLTAGE PART NO. PACKAGE PACKING Adjustable TS2596SCS RLG SOP-8 2,500pcs / 13Reel 5V TS2596SCS50 RLG SOP-8 2,500pcs / 13Reel 2 Version: C1602