sp7651 Exar Corporation, sp7651 Datasheet
sp7651
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sp7651 Summary of contents
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... Small 7mm x 4mm DFN Package • U.S. Patent #6,922,04 The SP7651 is a high voltage synchronous step-down switching regulator optimized for high efficiency. The part is designed to be especially attractive for dual supply, 2V step down with 5V used to power the controller. This lower V voltage minimizes power dissipation in the part. The SP765 is designed to provide a fully integrated CC buck regulator solution using a fixed 900kHz frequency, PWM voltage mode architecture ...
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These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods ...
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Unless otherwise specified: -40°C < T AMB 0.0V, UVIN = 3.0V µ 0.µ COMP • The denotes the specifications which apply over the full temperature range, unless otherwise specified. PARAMETER CONTROL LOOP: PWM COMPARATOR, ...
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... BST pin and SWN pin. 22 Vcc Input for external 5V bias supply General Overview The SP7651 is a fixed frequency, voltage mode, synchronous PWM regulator opti- mized for high efficiency. The part has been designed to be especially attractive for split plane applications utilizing 5V to power the controller and 2 ...
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V UVLO ensures that the controller CC itself has enough voltage to properly operate. Other protection features include thermal shutdown and short-circuit detection. In the event that either a thermal, short-circuit, or ...
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COMP pin externally simple, single pole, single zero response is desired, then compensation can be as simple ...
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Inductor Selection There are many factors to consider in se- lecting the inductor, including: core material, inductance vs. frequency, current handling capability, efficiency, size and EMI typi- cal SP765 circuit, the inductor is chosen primarily by operating frequency, ...
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... During an output load transient, the output capacitor must supply all the ad- ditional current demanded by the load until the SP7651 adjusts the inductor current to the new value. In order to maintain V the capacitance OUT, ...
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Tantalum capacitors are known for catastrophic failure when exposed to surge current, and input capacitors are prone to such surge current when power supplies are connected “live” to low impedance power sources. Loop Compensation Design ...
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Gain (dB) Condition: C22 >> CP1, R1 >> RZ3 20 Log (RZ2/R1) Bode Plot of Type III Error Amplifier Compensation. RZ3 V OUT R1 68.1k SET Type III Error Amplifier Compensation Circuit Rev J: 3/4/07 SP765 Wide Input ...
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SP765X Thermal Resistance The SP765X family has been tested with a variety of footprint layouts along with differ- ent copper area and thermal resistance has been measured. The layouts were done on 4 layer FR4 PCB with the top and ...
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Rev J: 3/4/07 SP765 Wide Input Voltage Range 3A, 900kHz, Buck Regulator © Copyright 2007 Sipex Corporation 2 ...
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Rev J: 3/4/07 SP765 Wide Input Voltage Range 3A, 900kHz, Buck Regulator TYPICAL PERFORMANCE CHARACTERISITICS 3 © Copyright 2007 Sipex Corporation ...
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Rev J: 3/4/07 SP765 Wide Input Voltage Range 3A, 900kHz, Buck Regulator PACkAGE: 26 PIN DFN © Copyright 2007 Sipex Corporation 4 ...
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Part Number Package Code RoHS SP765ER DFN26 SP765ER/TR DFN26 SP765ER-L DFN26 ▪ SP765ER-L/TR DFN26 ▪ Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the applica- tion ...