TS2580 2A / 52KHz Buck Switching Regulator SOP-8 Pin Definition: 1. VIN 8. GND 2. VOUT 7. GND 3. ADJ 6. GND 4. EN 5. GND General Description TS2580 Series are step-down switching regulators with all required active functions. It is capable of driving 2A load with excellent line and load regulations. These devices are available for adjustable output version. TS2580 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 100µA (typical) standby current. The output switch includes cycleby-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. Features ● ● ● ● ● ● ● ● ● Adjustable Output Voltage Range 1.23V~38.5V 52kHz fixed switching frequency Voltage Mode Non-synchronous PWM control Thermal Shutdown and Current Limit Protection ON/OFF Shutdown Control Input Short Circuit Protect (SCP) Operating Voltage Can be up to 40V Output Load Current 2A Low Power Standby Mode Ordering Information Part No. Package Packing TS2580CS RL SOP-8 2.5kpcs / 13” Reel TS2580CS RLG SOP-8 2.5kpcs / 13” Reel Note: “G” denotes Halogen Free Product. Application ● Simple High-efficiency Step down Regulator ● Charger ● Positive to Negative Converter Absolute Maximum Rating Parameter Symbol Limit Unit Maximum Supply Voltage Recommend Operating Supply Voltage SW, EN Pin Input Voltage Feedback Pin Voltage Power Dissipation Output Voltage to Ground Storage Temperature Range Operating Temperature Range ESD Susceptibility (HBM) VCC VOP VSW , VEN VFB PD VOUT TST TOP +45 4.5 to 40 -0.3 to +40 -0.3 to +25 Internally Limited -1 -65 to +150 -40 to +125 2 V V V V W V o C o C kV Symbol Maximum Thermal Information Parameter Unit o Thermal Resistance (Junction to Case) ӨJC 20 C/W o Thermal Resistance (Junction to Ambient) ӨJA 60 C/W Note1: ӨJA is measured on the PCB with minimum copper area. 2 Note2: ӨJA is measured with the PCB copper area (need connect to GROUND pins) of approximately 0.5 in 1/5 Version: B11 TS2580 2A / 52KHz Buck Switching Regulator Electrical Specifications (Ta = 25oC unless otherwise noted, VIN=12V, ILOAD =0.5A) Parameter Symbol Output Feedback VFB Test Condition 4.5V≤ VIN ≤40V 0.2A≤ ILOAD ≤3A Min Typ Max Unit 1.180 1.23 1.280 V Efficiency η VIN =12V, ILOAD =3A, VOUT =3.3V -- 78 -- % Feedback Bias Current IFB VFB = 1.3V (Adjustable Version) -- 10 50 nA 40 52 65 KHz 2.2 -- -- A -- 1.2 1.4 V Oscillator Frequency Current Limit FOSC ICL Saturation Voltage VSAT Pear Current, no outside circuit VFB =0V force driver on IOUT=2A, No outside circuit VFB =0V force driver on ON/OFF Pin Logic Input VIL Low (regulator ON) Threshold Voltage VIH High (regulator OFF) ON/OFF Pin Logic Input Current Quiescent Current SW Pin Leakage SW pin=0V Current SW pin=-0.8B 0.6 -- V VLOGIC =2.5V (OFF) -- -0.1 -10 IH VLOGIC =0V (ON) -- -0.01 -1 VFB =0V force driver on -- 100 -- -- 0 -- -- 4 8 mA -- 100 200 µA -- -- -200 uA -- -5 -- mA DC VFB =1.5V for ADJ version force driver off IQ Standby Quiescent Current 2.0 1.3 IL Maximum Duty Cycle (ON) Maximum Duty Cycle (OFF) -- ISTBY VFB =1.5V force driver off ON/OFF pin=5V VIN =40V No outside circuit, VFB =1.5V for ISWL ADJ version force force driver off VIN =40V force driver off µA % Block Diagram 2/5 Version: B11 TS2580 2A / 52KHz Buck Switching Regulator Pin Function Description VIN This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be presented at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. Ground Circuit ground SW Output Internal switch. The voltage at this pin switches between (+Vcc – Vsat) and approximately – 0.5V, with a duty cycle of approximately Vout / Vcc. To minimize coupling to sensitive circuitry, the PC board copper area connected to this pin should be minimized. Adjustable Adjustment Input Enable Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 100uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of Vcc) shuts the regulator down. If this shutdown feature is not needed, the EN pin can be wired to the ground pin. Typical Application Circuit 1. Adjustable output voltage version Resistor select for output voltage setting Vout R1 R2 4.7K 1.5K 5V 5.6K 1.8K 2.5K 1.5K 3.3V 3.0K 1.8K 2.5V 1.8K 1.8K 1.8V 0.82K 1.8K Vout VIN=12V VIN=24V L1 recommend value (IOUT=2A) 2.5V 3.3V 5V 120uH 120uH 120uH 120uH 120uH 120uH 12V NA 150uH 3/5 Version: B11 TS2580 2A / 52KHz Buck Switching Regulator SOP-8 Mechanical Drawing DIM A B C D F G K M P R SOP-8 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 4.80 5.00 0.189 0.196 3.80 4.00 0.150 0.157 1.35 1.75 0.054 0.068 0.35 0.49 0.014 0.019 0.40 1.25 0.016 0.049 1.27BSC 0.05BSC 0.10 0.25 0.004 0.009 0º 7º 0º 7º 5.80 6.20 0.229 0.244 0.25 0.50 0.010 0.019 Marking Diagram Y = Year Code M = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) = Month Code for Halogen Free Product (O=Jan, P=Feb, Q=Mar, R=Apl, S=May, T=Jun, U=Jul, V=Aug, W=Sep, X=Oct, Y=Nov, Z=Dec) L = Lot Code 4/5 Version: B11 TS2580 2A / 52KHz Buck Switching Regulator Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. 5/5 Version: B11