TS2596 Taiwan Semiconductor 3A / 150kHz Step-Down DC-DC Converter GENERAL DESCRIPTION FEATURES The TS2596 Series are step-down switching regulators Output voltage: 3.3V, 5V & adjustable version with all required active functions. It is capable of driving Adjustable output voltage range 1.23V~38.5V 3A load with excellent line and load regulations. These 150kHz fixed switching frequency devices are available in fixed output voltages of 3.3V, 5V, Voltage mode Non-synchronous PWM control and an adjustable output version. Thermal shutdown and current limit protection The TS2596 series operates at a switching frequency of ON/OFF shutdown control input 150kHz thus allowing smaller sized filter components than Short circuit protect (SCP) what would be needed with lower frequency switching Operating voltage can be up to 40V regulators. It substantially not only reduces the area of Output load current 3A board size but also the size of heat sink, and in some Low power standby mode cases no heat sink is required. The 4% tolerance on Built-in switching transistor on chip Compliant to RoHS Directive 2011/65/EU and in output voltage within specified input voltages and output accordance to WEEE 2002/96/EC. load conditions is guaranteed. Also, the oscillator Halogen-free according to IEC 61249-2-21 frequency accuracy is within 10%. External shutdown is included. Featuring 100A (typical) standby current. The APPLICATION output switch includes cycle-by-cycle current limiting, as Simple High-efficiency Step down Regulator well as thermal shutdown for full protection under fault On-Card Switching Regulators conditions. Positive to Negative Converter 2 Pin Definition: TO-263-5L (D PAK) 1. Input 2. SW Output 3. Ground 4. Feedback 5. Enable Notes: Moisture sensitivity level: level 3. Per J-STD-020 TYPICAL APPLICATIN CIRCUIT Adjustable Output Voltage Version R1 V = V (1 + ), V = 1.23V, R2 = 0.7k ~ 3k OUT FB FB R2 1 Version: G1608 TS2596 Taiwan Semiconductor ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL LIMIT UNIT V +45 Maximum Supply Voltage V CC Recommend Operating Supply Voltage V +4.5 to +40 V OP V , V SW, EN Pin Input Voltage -0.3 to +40 V SW EN V Feedback Pin Voltage FB -0.3 to +12 V P Power Dissipation Internally Limited W D Output Voltage to Ground V -1 V OUT T Storage Temperature Range -65 ~ +150 C ST Operating Temperature Range T -40 ~ +125 C OP ESD Susceptibility (HBM) 2 kV THERMAL INFORMATION PARAMETER SYMBOL LIMIT UNIT Junction to Case Thermal Resistance R 2 C/W JC Junction to Ambient Thermal Resistance R 50 C/W JA 2 Note: R is measured with the PCB copper area (need connect to GROUND pins) of approximately 1.5 in (Multi-layer) JA ELECTRICAL CHARACTERISTICS (V = 12V for 3.3V, 5V, Adjustable Version, I = 0.3A, T = 25C unless otherwise noted) IN LOAD A PARAMETER CONDITION SYMBOL MIN TYP MAX UNIT 4.5V V 40V IN Output Feedback V 1.180 1.23 1.280 V FB 0.2A I 3A LOAD ADJ V = 12V, I = 3A, IN LOAD Efficiency -- 77 -- % V = 5V 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 0.2A I 3A 5V LOAD Efficiency V = 12V, I = 3A -- 80 -- % IN LOAD V =1.3V (Adj version only) Feedback Bias Current FB I -- 10 100 nA FB Oscillator Frequency F 127 150 173 kHz OSC Soft-Start Time Rising edge of EN on to I T -- 3 -- ms CL SS Pear Current, no outside circuit Current Limit I 3.3 -- -- A CL V =0V force driver on FB Oscillator Frequency of When current limit occurred F 110 150 173 KHz o SCP Short Circuit Protect and 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 Low (regulator ON) V -- 1.3 0.6 V ON/OFF Pin Logic Input IL Threshold Voltage High (regulator OFF) V 2.0 1.3 -- V IH 2 Version: G1608