View THV3011_4721682.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. description THV3011 is a synchronous buck switching regulator ic with the external high side power mosfet. available high current power supply using a mini- mum number of external components, because any external phase compensation parts are not necessary. the bootstrap technology provides high efficiency more than 97%. utilizing the latest and thine?s unique architecture, THV3011 achieves ultra quick transient response. soft start by ss pins makes constant and stable soft start curve not depend on the load fluctuation. THV3011 also has the power-good function and the off-delay function to facilitate the setting of on/off sequence. features ? synchronous rectifier dc/dc converter ? wide input voltage range : 7.5~ 28v ? output voltage range : 0.85~4.0v ? large load current (depend on external fet) ? ultra quick transient response ? feed back voltage accuracy : 1% ? 360khz/500khz programmable oscillation frequency ? over current protection ? short circuit protection (latch function) ? undervoltage lockout function ? power-good function ? off delay function ? programmable soft start ? thermal shutdown ? small 4.4x5mm body tssop 16pin 1ch dc/dc converter THV3011 applications ? micro processor core/asic/fpga/dsp/ddr sdram/ddrii sdram power supply typical applications ctl input input power good output lg ll boot avcc hg ctl psi reg pgood fset ss offdelay fb csn csp gnd psi input output
2/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. absolute maximum ratings parameter symbol rating units avcc vcc -0.3 ~30 v psi, fb, offdelay, csp, csn, ss vl_in_1 -0.3 ~ 5.5 v fset vl_in_2 -0.3 ~ reg+0.3 v ctl vctl -0.3 ~ 30 v pgood vpgood -0.3 ~ 5.5 v boot vboot -0.3 ~ 35 v between boot and ll vll -0.3 ~ 5.5 v power dissipation pd 1.0 w junction temperature tj +125 c operating temperature ta -40 ~ +85 c storage temperature tstg -55 ~ +150 c lead temperature for soldering tlead 255 +5 c/-0 c/ 10sec c recommended operation conditions parameter symbol min max units input supply voltage avcc 7.5 28 v output voltage vo 0.85 4.0 v block diagram level shift hg avcc ctl fb gnd ll boot reg fset power good main control frequecy setup regulator reg ocp tsd scp ocp reg power linker tm offdelay uvlo pgood ctl fb tsd tsd lg csp csn psi ss reg ctl scp short circuit protection 5v
3/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. electrical characteristics (avcc=12v, vctl=3.3v, ta=25 c , unless otherwise noted.) parameter symbol conditions min typ max units operation current icc 1.5 3.0 ma stand-by current ist vctl=0v 20 40 ua regulator output voltage vreg ireg=0.1ma 4.75 5.00 5.25 v regulator maximum load cur- rent ireg 30 ma oscillation frequency 1 fosc1 fs et=reg, vpsi=reg 320 360 400 khz oscillation frequency 2 fosc2 fs et=open, vpsi=reg 440 500 560 khz minimum operation frequency foscmin vpsi=0v 8 khz minimum on pulse tonmin 100 nsec minimum off pulse toffmin 250 nsec feed back voltage vfb 0.8415 0.850 0.8585 v feed back bias current ivoset -50 0 50 na current sense offset vol tage dvcs csn=1.8v 50 60 70 mv scp threshold voltage vscp 0.6 v scp delay time tscp 4.1 msec low gate driver high side on resistance ronlh ilh=20ma 3.5 low gate driver low side on resistance ronll ill=20ma 2.0 high gate driver high side on resistance ronhh ihh=20ma 3.5 high gate driver low side on resistance ronhl ihl=20ma 1.5 under voltage threshold vuvlo 6.0 6.5 7.0 v under voltage hysteresis vuvlo-h 0.17 v soft start time tss css =1000pf 0.300 0.425 0.550 msec psi high input voltage vpsih 4.2 v psi low input voltage vpsil 0.3 v psi input bias current ipsi vpsi=5v 12.5 ua output pull-down on resis- tance roncsp vctl=0v 35
4/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. parameter symbol conditions min typ max units ctl on threshold voltage vctlon 1.5 v ctl off threshold voltage vctloff 0.7 v clt input current ictl vctl=3.3v 1.5 3.0 ua off delay time toffdelay coffdelay=1000pf 0.75 msec power good threshold voltage vpgood 0.65 0.70 0.75 v power good hysteresis voltage vpgood-h 100 mv power good output on resis- tance ronpgood vpgood=0.1v 1.0 2.0 k power good output off leak current ioffpgood vpgood=5v 1 ua
5/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. pin description pin symbol function 1 avcc power supply for control block. 2 psi power standby indication. applying low level voltage to this pin, ic goes into the light load mode. applying high level, ic operates in the synchronous mode. 3 boot bootstrap pin. bias input fo r high side power mosfet driver. 4 ll switching output. connect to the inductor node. 5fset oscillation frequency setting pin. connect to reg for 360khz, leave it open for 500khz. 6 hg high side gate drive output. 7 offdelay shut-off delay time setting. connect a capacitor to the gnd. 8 lg low gate drive output. 9 gnd ground. 10 pgood power good output. pgood outputs high level, when ctl pin is high level and output voltage is 82.4% or more of set voltage. 11 csn current sense negative input. 12 csp current sense positive input. when 60mv(typ) or more of voltage dif- ference is detected between csp pin and csn pin, the voltage on ll pin falls down to the low level. when the voltage on ctl pin is low level, the transistor turns to the on state and pull-down the output volt- age. 13 fb output voltage feedback. 14 ss soft start time setting pin. connect a capacitor to the gnd. 15 ctl enable pin. active at high level. ctl pin can be set at the voltage higher than avcc. 16 reg 5v regulator output. internal power supply for bootstrap and control circuit. connect a capacitor to the gnd.
6/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. power dissipation -40 -20 0 20 40 60 80 100 120 140 160 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 operating temperature [c] power dissipation [w]
7/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. thermal shut down (tsd) THV3011 has the built-in thermal shut down circuit to prevent damages caused by excessive heat. when the junction temperature reaches 125 (typ), tsd circuit stops switching operation and 5v regulator opera- tion. when falls down (20 typical hysteresis), the ou tput voltage will recover. c functional description soft start (ss) THV3011 has soft start circuit allows a gradual rising of output voltage to prevent overshooting of output volt- age and high inrush current during st art up. when uvlo is released and ctl pin is turned high level, an inter- nal 2ua constant current source starts to char ge an external capacitor connected to ss pin. css connected between ss pin and gnd is determined by soft start time. soft start time is the period of charg- ing ss pin to the reference voltage 0.85v with 2ua constant current source, and calculated as following : when tss=4.25msec, css=0.01uf. undervoltage lockout (uvlo) THV3011 has the built-in undervoltage lockout circuit to prevent the device from misoperation at low input voltages. uvlo stops switching operation and soft start operation, until avcc voltage rises up to 6.5v(typ). having the hysteresis circuit, uvlo stops switching operation and start to discharge ss pins, when avcc voltage falls down under 6.33v(typ). over current protection (ocp) THV3011 has the built-in over current protection circuit to limit over current caused by abnormal load cur- rent, etc. when a voltage difference between csn pin and csp pin exceeds 60mv(typ), ocp detects over cur- rent. ocp circuit monitors the bottom current of inductor to detect over current. when the voltage between csn pin and csp pin drops below 60mv(typ), high side fet gene rates on-pulse. therefore the average value of ripple current is added to the output current as following : rip i out i = s r v m 60 + rip i 2 1 (a) short circuit protection (scp) scp circuit is activated, when the output voltage drop continues. after so ft start operation is finished and feed- back voltage drops less than 0.6v(typ), scp detects a short circuit. if such cond ition continues for more than 4.1msec(typ), the device stops switching operation and go into latch state. the latc h state will be released by restarting to apply voltage on ctl pin or avcc pin. j t j t c out i l i s r mv 60 tss = u 2 v 85 0 . ss c = 0.425 6 10 css (sec)
8/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. off delay (offdelay) off delay function works to set the delay time from when low level voltage is applied on ctl pin till the device goes into standby state. the delay time can be set by connecting a capacitor between offdelay pin and gnd. the delay time is the period that offdela y pin is discharged with 4ua(typ) constant current source from 5.0v to threshold 2.0v(typ), and is calculated as follows. when off delay time = 7.5msec, = 0.01uf. od t = () ua 0 4 v 0 2 . . reg offd v c 7.5 6 10 offd c (sec) power good (pgood ) power good is a function to notify exte rnal circuits that the output voltage has reached to the normal voltage, and available as a sequence control or a reset signal for micro-processor. when the output voltage exceeds 82.4%(typ) of the user defined voltage, pgood pin is turned from low level to hi gh level. when the output voltage drops(70.6% typical hysteresis), pgood pin is tu rned to low level. when ctl pin is turned low level, pgood pin is also turned low le vel independent of the output voltage. please beware of following matters, when pgood pin is pulled-up to the external power source. the output transistor of pgood pin becomes active only when higher voltage than 2.5v is applied to avcc. therefore, pgood pin operates as follows. 1.when avcc voltage is less than 2.5v, pgood pin is high level even though the output voltage doesn?t reach to the user defined voltage. 2.when avcc voltage exceeds 2.5v, pgood pin is turned low level. 3.when avcc voltage reaches to 82.4%(typ) of the user defined voltage after the release of uvlo. ctl offdelay vout ctl offdelay vout od t 2.0v od t - offd c
9/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. setting the output voltage THV3011 detects the output ripple voltage. when th e output voltage reaches to the voltage defined by (between output capacitor and fb pin) and ( between fb pin and gnd) as following formula, ll pin is turned from low to high level for a constant time. dc output voltage at the continuous mode is calculated as following formula, adding the average of the ripple voltage ( ). power stand-by indicator (psi) continuous/light load modes are selectable by psi pin, high or low. high = continuous mode, low = light load mode. lg pin is held low and stops the oper ation of low side fet in the light load mode. 3 2 r r + bottom out v _ = fb v ? ? ? ? ? ? ? ? + + 4 3 2 1 r r r rip i esr r out v = ? ? ? ? ? ? ? ? + + 4 3 2 1 r r r 0.85v + esr rip r i 2 1 output pull-down THV3011 has a built-in output pull-down function to s horten the output fall time. wh en ctl pin is turned to low, an internal transistor connected between csp pin and gnd start to discharge the output capacitor. setting the oscillation frequency (fset) user can choose oscillation frequency 360khz or 500khz by adjusting the voltage on fset pin. high = 360khz(typ), open = 500khz(typ). 4 r fb gnd r4 r3 output r2
10/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. application example ex.) vcc=12v, vout=1.2 q1 pgood csn csp fb ss ctl reg offdelay pvcc fset ll boot psi gnd pgood csn csp fb ss ctl reg lg offdelay hg fset ll boot psi avcc ctl pgood vout=1.2v vcc=12v l1 2.5uh c1 220uf/4v r4 c4 1uf r1 12mohm c2 0.1uf psi u1 THV3011 r2 150ohm r3 3.9kohm 10kohm c6 0.01uf c5 0.01uf r5 47kohm c3 10uf/25v q2
11/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. 0.90 +0.05/-0.05 0-10(deg) 1.10max 0.10 +0.05/-0.05 0.60 +0.10/-0.10 1.00 0.25 the details of lead edge unit : mm 0.10 s 0.22 0.65 5.00 +0.10/-0.10 4.40 +0.10/-0.10 6.40 +0.10/-0.10 tssop16 pins package outline
12/12 THV3011_rev.1.00_e thine electronics, inc. copyright?2009 thine electronics, inc. notices and requests 1. the product specifications descri bed in this material are subjec t to change without prior notice. 2. the circuit diagrams described in this material are examples of the application which may not always apply to the customer's design. we are not responsible for possible errors and omissions in this material. please note if errors or omissions should be fo und in this mate rial, we may not be able to correct them immediately. 3. this material contains our copy right, know-how or other propr ietary. copying or disclosing to third parties the contents of this material without our prior permission is prohibited. 4. note that if infringement of any third part y's industrial ownership should occur by using this product, we will be exempted from the responsib ility unless it directly re lates to the production process or functions of the product. 5. this product is presumed to be used for general electric equi pment, not for the applications which require very high reliability (including medical equi pment directly concerning people's life, aerospace equipment, or nuc lear control equipment). also, wh en using this product for the equipment concerned with the control and safety of the transportation m eans, the traffic signal equipment, or various types of safety equipment, please do it after applying appropriate measures to the product. 6. despite our utmost efforts to imp rove the quality and reliability of the product, fa ults will occur with a certain small probability , which is inevitable to a semi-conductor product. therefore, you are encouraged to have sufficient ly redundant or error preventive design applied to the use of the product so as not to have our produc t cause any social or public damage. 7. please note that this product is not designed to be radiation-proof. 8. customers are asked, if required, to judge by them selves if this product falls under the category of strategic goods under the foreign exch ange and foreign trade control law. 9. the product or peripheral parts may be damaged by a surge in vol tage over the absolute maxi- mum ratings or malfunction, if pins of the product are s horted by such as foreign substance. the damages may cause a sm oking and ignition. therefore, you are encouraged to implement safety measures by adding protecti on devices, such as fuses. thine electronics, inc. e-mail : sales@thine.co.jp

▲Up To Search▲

Price & Availability of THV3011

	To Download THV3011 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .