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TB7004FL 2007-11-13 1 toshiba multi-chip module TB7004FL synchronous buck converter module for high-current and low-voltage applications the TB7004FL is a synchronous buck converter (step-down chopper) module. a dc-dc converter can be formed by combining the TB7004FL with a pwm control ic, inductors, and input and output capacitors. features ? operating frequency: up to 1 mhz ? incorporates 5-v regulator (output current: 10 ma.) ? vcin undervoltage lockout (uvlo) in uvlo mode, the gh and gl outputs are set low and reg5v is set to 0 v. (the internal voltage regulator is shut down.) ? thermal shutdown (tsd) ? low-side mosfet gate drive voltage: 5 to 12 v (max 16 v) the low-side mosfet gate drive volt age is supplied externally via vgin. ? disbl# is a digital input and can receive either a 12-v or 5-v logic high signal. ? disbl#: h = enables the internal circuitry. l = disables the internal circuitry and turns off both the high-side and low-side mosfets (gh = low, gl = low). the internal 5-v regulator remains active. ? the pwm input provides for 3-state output control. h: gh = h, gl = l l: gh = l, gl = h if the pwm input stays between the rising and falling threshold voltages for the 200-ns hold-off time, the TB7004FL turns off both the high-side and low-side mosf ets. thereafter, setting the pwm input high causes the TB7004FL to resume normal operation. ? the internal dead time control circuitry optimizes th e switching of the high-side and low-side mosfets. ? incorporates boot switch. charge switch for the bootstrap capacitor (the boot switch behaves like a schottky barrier diode.) marking care should be taken for static electricity when han dling this product since it has a mos structure. qfn56-p-0808-0.85a weight: 0.19 g (typ.) toshiba TB7004FL #1 pin index manufacturing code manufacturing code (10 or 11 characters) internal management code (may be null) production week (the first week of the ye ar is 01, and the last week of the year is 52 or 53.) production year (last digit of the year) assembly lot code (7 characters)
TB7004FL 2007-11-13 2 simplified block diagram detailed block diagram undervoltage lockout ci rcuit output signal h l uvlo normal operation vl vh vcin (v) 1.3 v/30 a gh dead-time control boot switch tsd low-side driver 5 v reg. vcin 12 v 2 v uvlo high-side driver 5 to 16 v on/off control boot vswh pgnd gl up to 19 v driver ic pwm thdn disbl# vgin cgnd 3-state control reg5v vin cgnd mosfet gate driver thdn reg5v disbl# pwm vcin boot gh vin vgin gl pgnd vswh low-side mos tab 1 42 (bottom view) 43 high-side mos tab 56 14 15 28 driver tab 29
TB7004FL 2007-11-13 3 pin configuration pin description symbol pin no. description notes cgnd 1, 6, 51, tab signal ground for control circuitry connect to pgnd. nc 2 no-connect pin vgin 3 power supply for low-side mosfet gate drive vcin 4 power supply for control circuitry boot 5 bootstrap capacitor connection gh 7 high-side mosfet gate si gnal for monitoring purposes vin 8 to 20, tab input pins. connected to an input of the on-chip the dc-dc converter. vswh 21, 40 to 50, tab output pi ns. output inductor connection pgnd 22 to 39 power ground gl 52 low-side mosfet gate signal for monitoring purposes thdn 53 open-drain output that indicates that thermal shutdown (tsd) has been tripped. an external pull-up resistor should be added to the thdn pin. held low in thermal shutdown mode. reg5v 54 internal 5-v regulator output disbl# 55 disable signal for inter nal circuitry. setting di sbl# high enables internal circuitry. setting disbl# low di sables internal circuitry. accepts both 5-v and 12-v signals. pwm 56 3-state enable input vin (bottom view) vswh cgnd pwm disbl# reg5v thdn gl cgnd vswh vswh vswh vswh vswh vswh vswh vswh cgnd nc vgin vcin boot cgnd gh vin vin vin vin vin vin vin vin vin vin vin vin vin vswh pgnd pgnd pgnd pgnd pgnd pgnd pgnd vswh vswh vswh pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd 43 44 45 46 47 48 49 50 51 52 53 54 55 56 1 2 3 4 5 6 7 8 9 10 11 12 13 14 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15
TB7004FL 2007-11-13 4 absolute maximum ratings (ta = 25c) characteristics symbol rating unit vin to pgnd voltage vin 30 v vcin to cgnd voltage vcin ? 0.3 to 16 v vswh to pgnd voltage vswh ?2 to 30 v vgin to cgnd voltage vgin ? 0.3 to 16 v boot to vswh voltage v boot -v swh ? 0.3 to reg5v + 0.3 v boot to cgnd voltage v boot ? 0.3 to 30 v pwm to cgnd voltage v pwm ? 0.3 to 5.3 v disbl# to cgnd voltage v disbl# ?0.3 to vcin + 0.3 v thdn to cgnd voltage v thdn ?0.3 to 6 v output rms current i out 35 a operating duty cycle d 70 % reg5v current i reg5v ? 10 to 0.1 ma t pcb = 25c p d (25) 25 w power dissipation t pcb = 110c p d (110) 8 w channel temperature t ch ? 40 to 150 c storage temperature t stg ? 55 to 150 c note: using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this pr oduct to decrease in the reliability significantly even if the operating conditions (i.e. operat ing temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. please design the appropriate reliability upon reviewing the toshiba semiconductor reliability handbook (?handling precautions?/?derating concept and methods?) and individual reliability data (i.e. reliability test report and estimated failure rate, etc).
TB7004FL 2007-11-13 5 electrical characteristics (vcin = 12 v, vgin = 5 v, v disbl# = 12 v, ta = 25c, unless otherwise specified) characteristics symbol pin te st condition min typ. max unit power supply operating input voltage v in (opr) vin ? ? ? 19 v operating input voltage v cin (opr) vcin ? 10 12 14 v quiescent current i cin (off) vcin v disbl# = 0, v pwm = 0 ? ? 1.3 ma operating vgin current i gin (opr) vgin f c = 1 mhz, duty = 10% ? ? 60 ma undervoltage lockout threshold v uvlo vcin ? 6.5 7.2 7.9 v undervoltage lockout hysteresis v hys-uvlo vcin ? ? 2.0 ? v pwm signal input pwm input rising threshold v h (pwm) pwm ? 3.2 3.5 3.8 v pwm input falling threshold v l (pwm) pwm ? 1.3 1.5 1.7 v pwm input resistance r pwm pwm v pwm = 5 v 33 50 77 k 3-state window v w (pwm) pwm ? v l (pwm) ? v h (pwm) v 3-state shutdown hold-off time t hold pwm v pwm = v w (pwm) ? 200 (note 1) ? ns disbl# signal input disbl# input rising threshold v h (disbl#) disbl# ? 3.2 3.5 3.8 v disbl# input falling threshold v l (disbl#) disbl# ? 1.3 1.5 1.7 v disbl# input current i disbl# disbl# v disbl# = 0 ? ? 5.0 a reg5v output reg5v output voltage v out(reg5v) reg5v i reg5v = ?10 ma 4.75 5.0 5.25 v line regulation reg ? line reg5v i reg5v = ?10 ma, v cin = 10 to 14 v ? ? 20 mv load regulation reg ? load reg5v i reg5v = 0 to ? 10 ma ? ? 20 mv thermal shutdown thermal shutdown threshold t tsdn ? ? 150 ? ? c thermal shutdown hysteresis t hys - tsdn ? ? ? 15 ? c thdn output low voltage v out (thdn) thdn i thdn = 2 ma ? ? 0.4 v thdn sink current i thdn thdn ? ? ? 5 ma note 1: design target only. not 100% tested in production. note 2: don?t use the TB7004FL after thermal shutdown is tripped, because the thermal shutdown circuitry operates beyond the rated absolute maximum tem perature. the thermal shutdown circ uitry cannot always protect the device from failure. the device may be permanently damaged before thermal shutdown is tripped, depending on usage conditions. refer to the description of thermal shutdown on page 13.
TB7004FL 2007-11-13 6 typical application TB7004FL vcin disbl# pwm cgnd vgin vin boot vswh reg5v pgnd TB7004FL vcin disbl# pwm cgnd vgin vin boot vswh reg5v pgnd TB7004FL vcin disbl# pwm cgnd vgin vin boot vswh reg5v pgnd TB7004FL vcin disbl# pwm cgnd vgin vin boot vswh reg5v pgnd v out = 1.3 v pwm4 pwm3 pwm2 pwm1 pwm controller v cin = 12 v v gin = 5 v v in = 12 v power gnd signal gnd
TB7004FL 2007-11-13 7 test circuit TB7004FL vcin disbl# pwm cgnd vgin vin boot vswh reg5v pgnd v cin v gin v in power gnd signal gnd v v v a a a i cin i gin i in v cin v gin v in 5 v pulse electric load i out averaging circuit v a veraging output voltage v out p in = i in v in + i cin v cin + i gin v gin p out = i out v out efficiency = p out /p in p loss = p in ? p out
TB7004FL 2007-11-13 8 performance characteristics p loss ? i out output current i out (a) input voltage v in (v) power loss p loss (w) power loss p loss (w) p loss ? v out output voltage v out (a) switching frequency f c (khz) power loss p loss (w) power loss p loss (w) p loss ? v in p loss ? f c 20 0 4 8 12 16 v in = 12 v v cin = 12 v v gin = 5 v v out = 1.3 v l = 0.6 h 200 400 600 800 1000 1200 i out = 30 a i out = 25 a 1400 1600 20 0 4 8 12 16 v in = 12 v v cin = 12 v v gin = 5 v f c = 1 mhz l = 0.6 h 0.6 1.0 1.4 1.8 2.2 2.6 3.0 3.4 3.8 i out = 30 a i out = 25 a 20 0 4 6 8 10 4 12 8 16 i out = 30 a v cin = 12 v v gin = 5 v v out = 1.3 v f c = 1 mhz l = 0.6 h i out = 25 a 12 14 16 24 20 0 0 4 8 12 16 4 8 12 16 20 v in = 12 v v cin = 12 v v gin = 5 v v out = 1.3 v f c = 1 mhz l = 0.6 h 32 28
TB7004FL 2007-11-13 9 500 0 100 200 300 400 v in = 12 v v cin = 12 v v out = 1.3 v i out = 0 a l = 0.6 h 200 400 600 1000 1400 v gin = 16 v v gin = 12 v v gin = 5 v 800 1200 1600 p loss ? l output inductance l ( h) v gin (v) power loss p loss (w) power loss p loss (w) i gin ? f c switching frequency f c (khz) switching frequency f c (khz) average i gin (ma) average i gin (ma) i cin ? f c p loss ? v gin 20 0 4 8 12 16 v in = 12 v v cin = 12 v v out = 1.3 v f c = 1 mhz l = 0.6 h 4 6 8 10 12 i out = 30 a i out = 25 a 14 16 100 0 20 40 60 80 v in = 12 v v cin = 12 v v out = 1.3 v i out = 0 a l = 0.6 h 200 400 600 800 1000 1400 1200 1600 v gin = 12 v v gin = 5 v v gin = 16 v 20 0 4 8 12 16 v in = 12 v v cin = 12 v v gin = 5 v v out = 1.3 v f c = 1 mhz 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 i out = 30 a i out = 25 a 1.1 1.2
TB7004FL 2007-11-13 10 note: this safe operating area was obtained using the following evaluation board. the safe operating area varies with board conditions. board conditions material: fr-4 number of layers: 4 copper thickness: 35 m board size: 75 mm 55 mm board thickness: 2.4 mm ? 0 5 10 15 20 25 30 35 40 0 25 50 75 100 125 150 ??() ?(a) vin = 12 v, vcin = 12 v, vgin = 5 v, vout = 1.3 v, f c = 1 mhz, l = 0.6 h pcb temperature ( o c) output current (a) safe operting area
TB7004FL 2007-11-13 11 operational description power supplies vgin: power supply for low-side mosfet gate drive the low-side gate drive voltage can be selected, independent of vcin. supply voltage: 5 to 16 v vcin: power supply for the internal control circuitry incorporates undervoltage lockout (uvlo.) uvlo threshold voltage: 7.2 v (typ.) uvlo hysteresis voltage: 2.0 v (typ.) in uvlo mode, the TB7004FL turns off both the high-side and low-side mosfets and shuts down the internal 5-v regulator. disbl# the disbl# input enables and di sables the mosfet drivers. h: normal operation l: turns off both the high -side and low-side mosfets. rising threshold voltage: 3.5 v (typ.) falling threshold voltage: 1.5 v (typ.) while the mosfet drivers are disabled , the 5-v regulator remains active. pwm control input for the intern al power mosfet drivers h: turns on the high-side mosfet and turns off the low-side mosfet. l: turns off the high-side mosfet and turns on the low-side mosfet. rising threshold voltage: 3.5 v (typ.) falling threshold voltage: 1.5 v (typ.) if the pwm input stays between the rising and falling threshold voltages for the 200-ns hold-off time, the TB7004FL turns off both the high-side and low-side mosfets. thereafter, setting the pwm input high causes the TB7004FL to resume normal operation. uvlo normal o p eration 7.2 9.2 vcin (v) disabled enabled 1.5 3.5 disbl# (v)
TB7004FL 2007-11-13 12 inputs outputs vcin disbl# pwm reg5v high-side mosfet low-side mosfet l ? ? off off off h l ? on off off h open ? on off off h h l on off on h h h on on off 200 ns high-side mosfet 3.5 v pwm low-side mosfet 1.5 v on off on off 200 ns 200 ns high-side mosfet 3.5 v pwm low-side mosfet 1.5 v on off on off 200 ns
TB7004FL 2007-11-13 13 thermal shutdown if the integrated driver ic temperature exceeds 165 c, thermal shutdown is tripped. tsd hysteresis: 15 c (typ.) if the integrated mos chip is the heating source, it ta kes some time for the overtemperature to be detected at the sensor due to the distance between them. the chip temperatur e might exceed the tsd threshold before the thermal shutdown circuitry is tripped. in the tsd mode, the TB7004FL turns off both the low-side and high-sid e mosfets and keeps the internal 5-v regulator active. thdn thdn is an open-drain output that indicates thermal shutdown. an external pull-up resistor shou ld be connected to this pin. during normal operation, the internal sw itch is off, causing thdn to be high. in thermal shutdown mode, the internal sw itch is on, causing thdn to be low. boot boot is an input pin from which the bootstrap capacitor is charged. the bootstrap capacitor should be connected between this pin and vswh. while the pwm signal is low (i.e., the high-side mosfet is off), the bootstrap capa citor is charged from the internal 5-v regulator. be sure to use a sufficiently large capacitor. typical capacitance: > 0.2 f (v in = 12 v, v out = 1.3 v, f c = 1 mhz) thermal shutdown normal operation 135 150 t ic (c)
TB7004FL 2007-11-13 14 package dimensions weight: 0.19 g (typ.) top view bottom view side view
TB7004FL 2007-11-13 15 recommended pcb footprint note on drypacking after the drypack is opened, the devices should be soldered within 168 hours of exposure to 30 c / 60% rh. 43 56 1 14 42 29 28 15 0.75 3.55 0.55 2.20 0.75 7.80 0.75 2.25 0.55 3.50 7.80 0.23 0.50 0.30 0.75 unit: mm
TB7004FL 2007-11-13 16 restrictions on product use 20070701-en ? the information contained herein is subject to change without notice. ? toshiba is continually working to improve the quality a nd reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inhe rent electrical sensitivity and vulnerability to physical stress. it is the responsibility of t he buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within s pecified operating ranges as set forth in the most recent toshib a products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semicondu ctor devices,? or ?toshiba semiconductor reliability handbook? etc. ? the toshiba products listed in this document are in tended for usage in general electronics applications (computer, personal equipment, office equipment, measuri ng equipment, industrial robotics, domestic appliances, etc.).these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunc tion or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage incl ude atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traf fic signal instruments, comb ustion control instruments, medical instruments, all types of safety devices, et c.. unintended usage of toshiba products listed in his document shall be made at the customer?s own risk. ? the products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. ? please contact your sales representative for product- by-product details in this document regarding rohs compatibility. please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations.

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