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| TB7001FL Preliminary TOSHIBA Multi Chip Module TB7001FL For high current and low voltage applications Synchronous buck converter module This product is a synchronous buck switching converter module. The additional components for DC-DC converter are a PWM control IC, an external inductor, and input and output capacitors. Features * * * * * * * * 3 chips (high-side MOSFET, low-side MOSFET, MOSFET gate driver- IC) are in 1 package. Maximum Input voltage is 19V, it is capable for note-PC applications. Under voltage lockout and thermal shut down Keeping off low-side MOSFET function. When load current is low, low-side MOSFET is able to been kept off. Consequently the efficiency increases at low load condition. Internal control circuit disable function. The quiescent current is less than 10 A. High operation frequency High output current High efficiency : fc = 1MHz (Max.) : IOUT = 20A (Max.) : = 85% ( VIN = 12 V VOUT = 1.5 V IOUT = 20A fc = 1MHz) Maximum ratings (Ta = 25C) Characteristics VIN to PGND voltage LX to PGND voltage VDD to SGND voltage BST to LX voltage BST to SGND voltage ON/OFF to SGND voltage SD to SGND voltage DISBL to SGND voltage Output RMS current Power dissipation Operating channel temperature Storage temperature Symbol VIN VLX VDD VBST-LX VBST VON/OFF VSD VDISBL IOUT PD Tch-opr Tstg -0.3 -0.3 -0.3 -0.3 -0.3 -2 -0.3 Ratings 30 30 6 VDD +0.3 30 VDD +0.3 VDD +0.3 VDD +0.3 20 TBD -40 ~ 150 -55 ~ 150 Unit V V V V V V V V A W C C 1 2004-12-24 TB7001FL Package outline 0.85mm 8.00mm 0.20mm 0.25mm min. 0.25mm min. 3.65mm 2.30mm 0.25mm min. 14 15 1 56 56 0.25mm min 3.65mm 2.30mm 1 14 15 8.00mm 28 29 42 43 43 42 29 6.35mm 28 Top view Side view Bottom view Block diagram 19V HO SD ON/OFF DISBL Driver IC VIN BST 5V 0.5V Level shift SGND UVLO 1.5V/20A LX VDD LO Overlap protection + PGND PGND(IC) 2 2004-12-24 0.25mm min 0.50mm 0.23mm 0.25mm min. TB7001FL Terminal configurations CGND SGND SD BST HO NC NC NC VIN VIN VIN VIN VIN VIN ON/OFF DISBL VDD PGND(IC) LO CGND LX LX LX LX LX LX LX LX 1 56 55 54 53 52 51 50 49 48 47 46 45 44 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CGND VIN 17 18 19 20 21 22 23 LX 24 25 26 27 28 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 VIN VIN VIN VIN VIN VIN LX PGND PGND PGND PGND PGND PGND PGND Terminal functions Name CGND SGND SD BST HO NC VIN LX PGND LO PGND(IC) VDD DISBL 1,51,Tab 2 3 4 5 6,7,8,39 9 20,Tab No. Internal driver-IC chip bed Internal driver-IC signal ground Shut down signal for the low-side MOSFET. When set to low, the low-side MOSFET is turned off. Connect to the external boot strap capacitor High-side MOSFET gate signal No internal connection. Keep them open. Input voltage for the DC-DC converter Switching node. Connect to the output inductor. Power ground Low-side MOSFT gate signal Internal driver-IC power ground Supply voltage for the internal driver-IC Disable signal for the internal control circuit. When set to low, the Internal control circuit is disabled. The high-side MOSFET and low-side MOSFET are turned off. Input signal For monitoring For monitoring Functions Notes Connect to the SGND Connect to the PGND 21,40 50,Tab 22 52 53 54 55 38 ON/OFF 56 LX LX LX NC PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND Bottom view 3 2004-12-24 TB7001FL Recommended PCB footprint (unit mm) 4 2004-12-24 TB7001FL Timing chart ON/OFF VDD Under voltage lockout start threshold Under voltage lockout stop threshold LX Under voltage lockout : When VDD is lower than Under voltage lockout start threshold, the operation is stopped. When VDD is higher than Under voltage lockout stop threshold, it return to the normal operation. (The hysteresis between lockout start and lockout stop is 0.7V.) 5 2004-12-24 TB7001FL Electrical specifications (VDD=5V , Ta=25 Characteristics Operating (VIN) Operating (VDD) input input Voltage Voltage Symbol VIN(OPR) VDD(OPR) IDD(OFF) IINH(ON/OFF) IINL(ON/OFF) IINH(SD) IINL(SD) VH(ON/OFF) VL(ON/OFF) VH(SD) VL(SD) VH(DISBL) VL(DISBL) RDS(ON)(L) RDS(ON)(H) ILEAK(H) Output cut-OFF current ILEAK(L) Switching time Turn off Turn on toff ton VF VUVLO Vhys-UVLO Terminal VIN VDD VDD ON/OFF ON/OFF SD SD ON/OFF ON/OFF SD SD DISBL DISBL LX-PGND VIN-LX VIN-LX LX-PGND LX LX , unless otherwise noted.) Conditions Min. 7 4.5 5 Typ. Max. 19 5.5 15 0.25 0 0 -0.4 2.0 0.8 2.0 0.8 2.0 0.8 -0.25 0.4 Unit V V A mA mA mA mA V V V V V V m m 10 100 30 60 0.6 2.6 2.8 0.7 0.7 3.1 A A ns ns V V V VDD quiescent current ON/OFF input current H ON/OFF input current L SD input current H SD input current L ON/OFF input rising threshold ON/OFF input falling threshold SD input rising threshold SD input falling threshold DISBL input rising threshold DISBL input falling threshold Output ON resistance VDISBL = 0 VON/OFF = 5V VON/OFF = 0 VSD = 5V VSD = 0 ILX = 10A ILX = -10A , VBST-LX = 5V VIN = 24V , LX = 0 VLX = 24V , PGND = 0 VBST-LX = 5V ILX=-20A 5 10 Internal SBD foreword voltage Under voltage lock out start threshold Under voltage lock out hysteresis PGND-LX IDR=10A VDD VDD 90% ON/OFF 10% 90% LX toff 10% ton 6 2004-12-24 |
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