High Speed, Dual, 4 A MOSFET Driver
with Thermal Protection
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
FEATURES GENERAL DESCRIPTION
Industry-standard-compatible pinout The ADP362x/ADP363x is a family of high current and dual high
High current drive capability
speed drivers, capable of driving two independent N-channel
Precise threshold shutdown comparator
power MOSFETs. The family uses the industry-standard foot-
UVLO with hysteresis
print but adds high speed switching performance and improved
Overtemperature warning signal
system reliability.
Overtemperature shutdown
The family has an internal temperature sensor and provides
3.3 V-compatible inputs
two levels of overtemperature protection, an overtemperature
10 ns typical rise time and fall time @ 2.2 nF load
warning, and an overtemperature shutdown at extreme junction
Matched propagation delays between channels
temperatures.
Fast propagation delay
The SD function, generated from a precise internal comparator,
9.5 V to 18 V supply voltage (ADP3633/ADP3634/ADP3635)
provides fast system enable or shutdown. This feature allows
4.5 V to 18 V supply voltage (ADP3623/ADP3624/ADP3625)
redundant overvoltage protection, complementing the protec-
Parallelable dual outputs
tion inside the main controller device, or provides safe system
Rated from 40C to +85C ambient temperature
shutdown in the event of an overtemperature warning.
Thermally enhanced packages, 8-lead SOIC_N_EP and
8-lead MINI_SO_EP
The wide input voltage range allows the driver to be compatible
with both analog and digital PWM controllers.
APPLICATIONS
Digital power controllers are supplied from a low voltage
AC-to-dc switch mode power supplies
supply, and the driver is supplied from a higher voltage supply.
DC-to-dc power supplies
The ADP362x/ADP363x family adds UVLO and hysteresis
Synchronous rectification
functions, allowing safe startup and shutdown of the higher
Motor drives
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
V
DD ADP3623/ADP3624/ADP3625
ADP3633/ADP3634/ADP3635
8 OTW
1
SD
OVERTEMPERATURE
PROTECTION
V V
DD
EN
NONINVERTING
2
INA,
7
OUTA
INA
INVERTING
PGND 3
UVLO 6 VDD
NONINVERTING
4
INB,
5
OUTB
INB
INVERTING
Figure 1.
Rev. A
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08132-101ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
TABLE OF CONTENTS
Features .............................................................................................. 1 Theory of Operation ...................................................................... 12
Applications ....................................................................................... 1 Input Drive Requirements (INA, INA, INB, INB, and SD) .. 12
General Description ......................................................................... 1
Low-Side Drivers (OUTA, OUTB) .......................................... 12
Functional Block Diagram .............................................................. 1
Shutdown (SD) Function .......................................................... 12
Revision History ............................................................................... 2
Overtemperature Protections ................................................... 12
Specifications ..................................................................................... 3
Supply Capacitor Selection ....................................................... 13
Timing ........................................................... ..... 4
PCB Layout Considerations ...................................................... 13
Absolute Maximum Ratings ............................................................ 6 Parallel Operation ...................................................................... 13
ESD Caution .................................................................................. 6
Thermal Considerations ............................................................ 14
Pin Configuration and Function Descriptions ............................. 7
Outline Dimensions ....................................................................... 15
Typical Performance Characteristics ............................................. 9
Ordering Guide .......................................................................... 16
Test Circuit ...................................................................................... 11
REVISION HISTORY
7/09Rev. 0 to Rev. A Changes to Figure 16 to Figure 19 Captions ............................... 10
Added ADP3623, ADP3625, ADP3633, and Changes to Figure 20 ...................................................................... 11
ADP3635 .............................................................................. Universal Changes to Figure 21, Input Drive Requirements (INA,
Changes to Features Section, General Description Section,
INA, INB, INB, and SD) Section, and Figure 22 ........................ 12
and Figure 1 ....................................................................................... 1
Changes to Figure 23 and Parallel Operation Section ............... 13
Changes to Table 1 ............................................................................ 3
Changes to Design Example Section ........................................... 14
Added Figure 4; Renumbered Sequentially .................................. 4
Changes to Ordering Guide .......................................................... 16
Added Figure 7 .................................................................................. 7
Added Table 3; Renumbered Sequentially .................................... 7
5/09Revision 0: Initial Version
Added Figure 9 and Table 5 ............................................................. 8
Changes to Figure 10 ........................................................................ 9
Rev. A | Page 2 of 16
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