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LTM4600HVEV-PBF Datasheet(PDF) 6 Page - Linear Technology |
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LTM4600HVEV-PBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 24 page  LTM4600HV 6 4600hvfc PI FU CTIO S VIN (Bank 1): Power Input Pins. Apply input voltage between these pins and GND pins. Recommend placing input decoupling capacitance directly between VIN pins and GND pins. fADJ (Pin A15): A 110k resistor from VIN to this pin sets the one-shot timer current, thereby setting the switching frequency. The LTM4600HV switching frequency is typically 850kHz. An external resistor to ground can be selected to reduce the one-shot timer current, thus lower the switching frequency to accommodate a higher duty cycle step down requirement. See the applications section. SVIN(PinA17):SupplyPinforInternalPWMController.Leave this pin open or add additional decoupling capacitance. EXTVCC (Pin A19): External 5V supply pin for controller. If left open or grounded, the internal 5V linear regulator will power the controller and MOSFET drivers. For high input voltage applications, connecting this pin to an external 5V will reduce the power loss in the power module. The EXTVCC voltage should never be higher than VIN. VOSET (Pin A21): The Negative Input of The Error Amplifier. Internally,thispinisconnectedtoVOUTwitha100kprecision resistor. Different output voltages can be programmed with additional resistors between the VOSET and SGND pins. COMP (Pin B23): Current Control Threshold and Error Amplifier Compensation Point. The current comparator threshold increases with this control voltage. The voltage ranges from 0V to 2.4V with 0.8V corresponding to zero sense voltage (zero current). SGND (Pin D23): Signal Ground Pin. All small-signal components should connect to this ground, which in turn connects to PGND at one point. RUN/SS (Pin F23): Run and Soft-Start Control. Forcing this pin below 0.8V will shut down the power supply. Inside the power module, there is a 1000pF capacitor which provides approximately 0.7ms soft-start time with 200μF output capacitance. Additional soft-start time can be achieved by adding additional capacitance between the RUN/SS and SGND pins. The internal short-circuit latchoff can be disabled by adding a resistor between this pin and the VIN pin. This resistor must supply a minimum 5μA pull up current. FCB (Pin G23): Forced Continuous Input. Grounding this pin enables forced continuous mode operation regardless of load conditions. Tying this pin above 0.63V enables discontinuous conduction mode to achieve high efficiency operation at light loads. There is an internal 4.75K resistor between the FCB and SGND pins. PGOOD (Pin J23): Output Voltage Power Good Indicator. When the output voltage is within 10% of the nominal voltage, the PGOOD is open drain output. Otherwise, this pin is pulled to ground. PGND (Bank 2): Power ground pins for both input and output returns. VOUT (Bank 3): Power Output Pins. Apply output load between these pins and GND pins. Recommend placing High Frequency output decoupling capacitance directly between these pins and GND pins. (See Package Description for Pin Assignment) E C A RUN/SS FCB PGOOD VIN BANK 1 PGND BANK 2 VOUT BANK 3 COMP SGND TOP VIEW 35 24 79 68 11 13 10 12 15 17 14 16 19 21 18 20 22 1 23 B D F G H J L M N P R T K 4600hv PN01 |
Similar Part No. - LTM4600HVEV-PBF |
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Similar Description - LTM4600HVEV-PBF |
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