MCP14700T-E/MF【PDF 1/26 页】IC MOSFET DRIVER HIGH/LOW 8DFN

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MCP14700

Dual Input Synchronous MOSFET Driver

Features

? Independent PWM Input Control for High-Side

and Low-Side Gate Drive

? Input Logic Level Threshold 3.0V TTL Compatible

? Dual Output MOSFET Drive for Synchronous

Applications

? High Peak Output Current: 2A (typical)

? Internal Bootstrap Blocking Device

? +36V BOOT Pin Maximum Rating

? Low Supply Current: 45 μA (typical)

? High Capacitive Load Drive Capability:

- 3300 pF in 10.0 ns (typical)

? Input Voltage Undervoltage Lockout Protection

? Overtemperature Protection

? Space Saving Packages:

- 8-Lead SOIC

- 8-Lead 3x3 DFN

Applications

? 3-Phase BLDC Motor Control

? High Efficient Synchronous DC/DC Buck

Converters

? High Current Low Output Voltage Synchronous

DC/DC Buck Converters

? High Input Voltage Synchronous DC/DC Buck

Converters

? Core Voltage Supplies for Microprocessors

General Description

The MCP14700 is a high-speed synchronous

MOSFET driver designed to optimally drive a high-side

and low-side N-Channel MOSFET. The MCP14700

has two PWM inputs to allow independent control of the

external N-Channel MOSFETs. Since there is no

internal cross conduction protection circuitry the

external MOSFET dead time can be tightly controlled

allowing for more efficient systems or unique motor

control algorithms.

The transition thresholds for the PWM inputs are

typically 1.6V on a rising PWM input signal and typically

1.2V on a falling PWM input signal. This makes the

MCP14700 ideally suited for controllers that utilize 3.0V

TTL/CMOS logic. The PWM inputs are internally pulled

low ensuring the output drive signals are low if the

inputs are floating.

The HIGHDR and LOWDR peak source current

capability of the MCP14700 device is typically 2A.

While the HIGHDR can sink 2A peak typically, the

LOWDR can sink 3.5A peak typically. The low

resistance pull-up and pull-down drive allow the

MCP14700 to quickly transition a 3300 pF load in

typically 10 ns. Bootstrapping for the high-side drive is

internally implemented which allows for a reduced

system cost and design complexity.

The MCP14700 features under voltage lock out

(UVLO) with a typical hysteresis of 500 mV.

Overtemperature protection with hysteresis is also

featured on the device.

Package Types

MCP14700

SOIC

PHASE 1

PWM HI 2

PWM LO 3

GND 4

8 HIGHDR

7 BOOT

6 V CC

5 LOWDR

MCP14700

3x3 DFN*

PHASE 1

8 HIGHDR

PWM HI 2

PWM LO 3

GND 4

7 BOOT

6 V CC

5 LOWDR

* Includes Exposed Thermal Pad (EP); see Table 3-1 .

? 2009 Microchip Technology Inc.

DS22201A-page 1

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