High Speed, Dual, 4 A MOSFET Driver

with Thermal Protection

ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635

Rev. A

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FEATURES

Industry-standard-compatible pinout

High current drive capability

Precise threshold shutdown comparator

UVLO with hysteresis

Overtemperature warning signal

Overtemperature shutdown

3.3 V-compatible inputs

10 ns typical rise time and fall time @ 2.2 nF load

Matched propagation delays between channels

Fast propagation delay

9.5 V to 18 V supply voltage (ADP3633/ADP3634/ADP3635)

4.5 V to 18 V supply voltage (ADP3623/ADP3624/ADP3625)

Parallelable dual outputs

Rated from −40°C to +85°C ambient temperature

Thermally enhanced packages, 8-lead SOIC_N_EP and

8-lead MINI_SO_EP

APPLICATIONS

AC-to-dc switch mode power supplies

DC-to-dc power supplies

Synchronous rectification

Motor drives

GENERAL DESCRIPTION

The ADP362x/ADP363x is a family of high current and dual high

speed drivers, capable of driving two independent N-channel

power MOSFETs. The family uses the industry-standard foot-

print but adds high speed switching performance and improved

system reliability.

The family has an internal temperature sensor and provides

two levels of overtemperature protection, an overtemperature

warning, and an overtemperature shutdown at extreme junction

temperatures.

The SD function, generated from a precise internal comparator,

provides fast system enable or shutdown. This feature allows

redundant overvoltage protection, complementing the protec-

tion inside the main controller device, or provides safe system

shutdown in the event of an overtemperature warning.

The wide input voltage range allows the driver to be compatible

with both analog and digital PWM controllers.

Digital power controllers are supplied from a low voltage

supply, and the driver is supplied from a higher voltage supply.

The ADP362x/ADP363x family adds UVLO and hysteresis

functions, allowing safe startup and shutdown of the higher

voltage supply when used with low voltage digital controllers.

The device family is available in thermally enhanced SOIC_N_EP

and MINI_SO_EP packaging to maximize high frequency and

current switching in a small printed circuit board (PCB) area.

FUNCTIONAL BLOCK DIAGRAM

1

8

2

7

3

6

4

5

OVERTEMPERATURE

PROTECTION

NONINVERTING

INA,

INA

PGND

INB,

INB

SD

OUTA

VDD

OUTB

OTW

INVERTING

NONINVERTING

INVERTING

UVLO

ADP3623/ADP3624/ADP3625

ADP3633/ADP3634/ADP3635

Figure 1.