uPI Semiconductor Corp., http://www.upi-semi.com

Rev. F03, File Name: uP6281-DS-F0300

uP6281

1

12V MOSFET Drivers with Output Disable

for Single Phase Synchronous-Rectified Buck Converter

All-In-One Synchronous Buck Drivers

Bootstrapped High-Side Driver

Adaptive Anti-Shoot-Through Protection

Circuitry

1 PWM Signal Generates both Drivers

Tri-State Input for Bridge Shutdown

Output Disable Control Turns Off both MOSFETs

Under Voltage Lockout for Supply Input

PSOP-8L or WDFN3x3-8L Packages

RoHS Compliant and Halogen Free

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8

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8

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2

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Core Voltage Supplies for Desktop,

Motherboard CPUs

High Frequency Low Profile DC/DC Converters

High Current Low Voltage DC/DC Converters

General Description

Applications

Ordering Information

Features

The uP6281 is a dual, high voltage MOSFET driver optimized

for driving two N-Channel MOSFETs in a synchronous-

rectified buck converter. Each driver is capable of driving a

5000pF load with 30ns transition time. This device combined

with uPI multi-phase buck PWM controller forms a complete

core voltage regulator for advanced micro-processors.

The uP6281 features adaptive anti-shoot-through protection

that prevents cross-conduction of the external MOSFET

while maintains minimum deadtime for optimized efficiency.

Both gate drives are turned off by pulling low OD# pin or

high-impedance at PWM pin, preventing rapid output

capacitor discharge during system shutdowns.

Other feature is supply input under voltage lockout. The

uP6281 is available in thermal enhanced PSOP-8L or

WDFN3x3-8L packages.

Pin Configuration & Typical Application Circuit

8

UGATE

BOOT

PHASE

GND

LGATE

PWM

OD#

VCC

7

6

5

1

2

3

4

PWM

Input

VCC

VIN

VOUT

UGATE

BOOT

PHASE

GND

LGATE

PWM

OD#

VCC

1

2

3

4

6

7

8

PSOP-8L

GND

5

8 UGATE

BOOT

PHASE

GND

LGATE

PWM

OD#

VCC

WDFN3x3-8L

GND

7

6

5

1

2

3

4

Note: uPI products are compatible with the current IPC/

JEDEC J-STD-020 requirement. They are halogen-free,

RoHS compliant and 100% matte tin (Sn) plating that are

suitable for use in SnPb or Pb-free soldering processes.