ts2580 2a / 52khz buck switching regulator 1/5 version: b11 sop - 8 general description ts2580 series are step-down switching regulators wi th all required active functions. it is capable of driving 2a load with excellent line and load regulations. thes e devices are available for adjustable output versi on. ts2580 series operates at a switching frequency of 52khz t hus allowing smaller sized filter components than w hat would be needed with lower frequency switching regulators . it substantially not only reduces the area of boa rd size but also the size of heat sink, and in some cases no he at sink is required. the 4% tolerance on output vo ltage within specified input voltages and output load conditions is guaranteed. also, the oscillator frequency accu racy is within 10%. external shutdown is included. featuring 100 a (typical) standby current. the output switch incl udes cycle- by-cycle current limiting, as well as thermal shutd own 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 v cc +45 v recommend operating supply voltage v op 4.5 to 40 v sw, en pin input voltage v sw , v en -0.3 to +40 v feedback pin voltage v fb -0.3 to +25 v power dissipation p d internally limited w output voltage to ground v out -1 v storage temperature range t st -65 to +150 o c operating temperature range t op -40 to +125 o c esd susceptibility (hbm) 2 kv thermal information parameter symbol maximum unit thermal resistance (junction to case) ? jc 20 o c/w thermal resistance (junction to ambient) ? ja 60 o c/w note1: ? ja is measured on the pcb with minimum copper area. note2: ? ja is measured with the pcb copper area (need connect to ground pins) of approximately 0.5 in 2 pin definition : 1. vin 8. gnd 2. vout 7. gnd 3. adj 6. gnd 4. en 5. gnd
ts2580 2a / 52khz buck switching regulator 2/5 version: b11 electrical specifications (ta = 25 o c unless otherwise noted, v in =12v, i load =0.5a) parameter symbol test condition min typ max unit output feedback v fb 4.5v v in 40v 0.2a i load 3a 1.180 1.23 1.280 v efficiency h v in =12v, i load =3a, v out =3.3v -- 78 -- % feedback bias current i fb v fb = 1.3v (adjustable version) -- 10 50 na oscillator frequency f osc 40 52 65 khz current limit i cl pear current, no outside circuit v fb =0v force driver on 2.2 -- -- a saturation voltage v sat i out =2a, no outside circuit v fb =0v force driver on -- 1.2 1.4 v on/off pin logic input threshold voltage v il low (regulator on) -- 1.3 0.6 v v ih high (regulator off) 2.0 -- on/off pin logic input current i l v logic =2.5v (off) -- -0.1 -10 a i h v logic =0v (on) -- -0.01 -1 maximum duty cycle (on) dc v fb =0v force driver on -- 100 -- % maximum duty cycle (off) v fb =1.5v for adj version force driver off -- 0 -- quiescent current i q v fb =1.5v force driver off -- 4 8 ma standby quiescent current i stby on/off pin=5v v in =40v -- 100 200 a sw pin leakage current sw pin=0v i swl no outside circuit, v fb =1.5v for adj version force force driver off -- -- -200 ua sw pin=-0.8b v in =40v force driver off -- -5 -- ma block diagram
ts2580 2a / 52khz buck switching regulator 3/5 version: b11 pin function description vin this is the positive input supply for the ic switch ing regulator. a suitable input bypass capacitor mu st be presented at this pin to minimize voltage transients and to s upply the switching currents needed by the regulato r. ground circuit ground sw output internal switch. the voltage at this pin switches b etween (+vcc C vsat) and approximately C 0.5v, with a duty cycle of approximately vout / vcc. to minimize coupling t o sensitive circuitry, the pc board copper area con nected to this pin should be minimized. adjustable adjustment input enable allows the switching regulator circuit to be shutdo wn using logic level signals thus dropping the tota l input supply current to approximately 100ua. pulling this pin be low a threshold voltage of approximately 1.3v turns the regulator on, and pulling this pin above 1.3v (up to a maximu m of vcc) shuts the regulator down. if this shutdow n feature is not needed, the en pin can be wired to the ground p in. typical application circuit 1. adjustable output voltage version resistor select for output voltage setting vout r1 r2 5v 4.7k 1.5k 5.6k 1.8k 3.3v 2.5k 1.5k 3.0k 1.8k 2.5v 1.8k 1.8k 1.8v 0.82k 1.8k l1 recommend value (i out =2a) vout 2.5v 3.3v 5v 12v v in =12v 120uh 120uh 120uh na v in =24v 120uh 120uh 120uh 150uh
ts2580 2a / 52khz buck switching regulator 4/5 version: b11 sop-8 mechanical drawing 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 sop-8 dimension dim millimeters inches min max min max. a 4.80 5.00 0.189 0.196 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27bsc 0.05bsc k 0.10 0.25 0.004 0.009 m 0o 7o 0o 7o p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019
ts2580 2a / 52khz buck switching regulator 5/5 version: b11 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 erro rs 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 tscs terms and co nditions of sale for such products, tsc assumes no liability wh atsoever, and disclaims any express or implied warr anty, relating to sale and/or use of tsc products includi ng liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, cop yright, or other intellectual property right. the products shown herein are not designed for use in medical, life-saving, or life-sustaining applica tions. customers using or selling these products for use i n such applications do so at their own risk and agr ee to fully indemnify tsc for any damages resulting from such i mproper use or sale.
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