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•                                                                                                                                                                                                                   MP2459  55V DCDC converter

描述

MP2459 is a high voltage gate driver designed to drive both the high side and low side N-Channel MOSFETs in a synchronous buck or half bridge configuration. The floating high side driver is capable of working with rail voltages up to 100V. The single control input is compatible with TTL signal levels and a single external resistor programs the switching transition dead-time through tightly matched turn-on delay circuits. The robust level shift technology operates at high speed while consuming low power and provides clean output transitions. Under-voltage lockout disables the gate driver when either the low side or the bootstrapped high side supply voltage is below the operating threshold. The LM5106 is offered in the VSSOP-10 or thermally enhanced 10-pin WSON plastic package.

MP2459 特性

• The MP2459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.*** peak-output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides a fast transient response and eases loop stabilization. Fault condition protections include cycle?by?cycle current limiting and thermal shutdown. The MP2459 requires a minimal number of readily-available external components. The MP2459 is available in a TSOT23-6 package.

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• Product Features

• 0.*** Peak Output Current

• 1Ω Internal Power MOSFET

• Stable with Low-ESR Ceramic Output Capacitors

• Up to 90% Efficiency

• 0.1μA Shutdown Mode

• Fixed 480kHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over-Current Protection

• Wide 4.5V-to-55V Operating Input Range

• Output Adjustable from 0.81V to 0.95*VIN

• Available in a TSOT23-6 Package

• Parametrics

• fsw (max) (kHz)480

• Vin (min) (V)4.5

• Vin (max) (V)55

• Iout (max) (A)0.5

• Isw Limit (typ) (A)1.25

• Max Duty Cycle (%)0.935

• Vfb (V)0.812

• Iq (typ) (mA)0.73

• Regulated Outputs1

• Vout (max) (V)52

• Vout (min) (V)0.81

• GradeCatalog

• PackageTSOT23-6

• EV2459-J-00A

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  0.***, 480kHz, 55V Step-Down Converter Evaluation Board

  
  

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• The EV2459-J-00A is an evaluation board for the MP2459, a fixed 480kHz frequency step-down switching regulator with an integrated high-side high voltage power MOSFET.

• The board can provide the load current up to 0.6A. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition. The 5V to 55V input range accommodates a variety of step-down applications.

• The board provides compact arrangement of components. By switching at 480kHz, smaller value inductor and input/output capacitor can be used to lower down cost and save board space.

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• WSON-10 (4 mm × 4 mm) and VSSOP-10 Package