High Speed, Dual, 4 A MOSFET Driver
with Thermal Protection
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
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
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.
APPLICATIONS
AC-to-dc switch mode power supplies
DC-to-dc power supplies
Synchronous rectification
Motor drives
FUNCTIONAL BLOCK DIAGRAM
V
DD
ADP3623/ADP3624/ADP3625
ADP3633/ADP3634/ADP3635
8
SD
1
OVERTEMPERATURE
PROTECTION
V
EN
NONINVERTING
INA,
2
INA
INVERTING
PGND
3
UVLO
NONINVERTING
INB,
4
INB
INVERTING
V
DD
OTW
7
OUTA
6
VDD
5
OUTB
08132-101
Figure 1.
Rev. A
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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Tel: 781.329.4700
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing
.......................................................
.... ..... 4
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 9
Test Circuit ...................................................................................... 11
Theory of Operation ...................................................................... 12
Input Drive Requirements (INA, INA, INB, INB, and SD) .. 12
Low-Side Drivers (OUTA, OUTB) .......................................... 12
Shutdown (SD) Function .......................................................... 12
Overtemperature Protections ................................................... 12
Supply Capacitor Selection ....................................................... 13
PCB Layout Considerations ...................................................... 13
Parallel Operation ...................................................................... 13
Thermal Considerations............................................................ 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 16
REVISION HISTORY
7/09—Rev. 0 to Rev. A
Added ADP3623, ADP3625, ADP3633, and
ADP3635 .............................................................................. Universal
Changes to Features Section, General Description Section,
and Figure 1 ....................................................................................... 1
Changes to Table 1 ............................................................................ 3
Added Figure 4; Renumbered Sequentially .................................. 4
Added Figure 7.................................................................................. 7
Added Table 3; Renumbered Sequentially .................................... 7
Added Figure 9 and Table 5............................................................. 8
Changes to Figure 10 ........................................................................ 9
Changes to Figure 16 to Figure 19 Captions ............................... 10
Changes to Figure 20...................................................................... 11
Changes to Figure 21, Input Drive Requirements (INA,
INA, INB, INB, and SD) Section, and Figure 22 ........................ 12
Changes to Figure 23 and Parallel Operation Section ............... 13
Changes to Design Example Section ........................................... 14
Changes to Ordering Guide .......................................................... 16
5/09—Revision 0: Initial Version
Rev. A | Page 2 of
16
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
SPECIFICATIONS
V
DD
= 12 V, T
J
= −40°C to +125°C, unless otherwise noted.
1
Table 1.
Parameter
SUPPLY
Supply Voltage Range
Supply Current
Standby Current
UVLO
Turn-On Threshold Voltage
Turn-Off Threshold Voltage
Hysteresis
DIGITAL INPUTS (INA, INA, INB, INB, SD)
Input Voltage High
Input Voltage Low
Input Current
SD Threshold High
SD Threshold Low
SD Hysteresis
Internal Pull-Up/Pull-Down Current
OUTPUTS (OUTA, OUTB)
Output Resistance, Unbiased
Peak Source Current
Peak Sink Current
SWITCHING TIME
OUTA, OUTB Rise Time
OUTA, OUTB Fall Time
OUTA, OUTB Rising Propagation Delay
OUTA, OUTB Falling Propagation Delay
SD Propagation Delay Low
SD Propagation Delay High
Delay Matching Between Channels
OVERTEMPERATURE PROTECTION
Overtemperature Warning Threshold
Overtemperature Shutdown Threshold
Temperature Hysteresis for Shutdown
Temperature Hysteresis for Warning
Overtemperature Warning Low
1
Symbol
V
DD
V
DD
I
DD
I
SBY
V
UVLO_ON
V
UVLO_ON
V
UVLO_OFF
V
UVLO_OFF
Test Conditions/Comments
ADP3633/ADP3634/ADP3635
ADP3623/ADP3624/ADP3625
No switching, INA, INA, INB, and INB disabled
SD = 5 V
V
DD
rising, T
A
= 25°C, ADP3633/ADP3634/ADP3635
V
DD
rising, T
A
= 25°C, ADP3623/ADP3624/ADP3625
V
DD
falling, T
A
= 25°C, ADP3633/ADP3634/ADP3635
V
DD
falling, T
A
= 25°C, ADP3623/ADP3624/ADP3625
ADP3633/ADP3634/ADP3635
ADP3623/ADP3624/ADP3625
Min
9.5
4.5
Typ
Max
18
18
3
3
9.5
4.5
8.5
4.3
Unit
V
V
mA
mA
V
V
V
V
V
V
V
V
µA
V
V
V
mV
µA
kΩ
A
A
1.2
1.2
8.0
3.8
7.0
3.5
8.7
4.2
7.7
3.9
1.0
0.3
V
IH
V
IL
I
IN
V
SD_H
V
SD_H
V
SD_L
V
SD_HYST
2.0
0 V < V
IN
< V
DD
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
−20
1.19
1.21
0.95
240
0.8
+20
1.38
1.35
1.05
320
1.28
1.28
1.0
280
6
80
4
−4
10
10
14
22
32
48
2
VDD = PGND
See Figure 20
See Figure 20
t
RISE
t
FALL
t
D1
t
D2
t
dL_SD
t
dH_SD
C
LOAD
= 2.2 nF, see Figure 3 and Figure 4
C
LOAD
= 2.2 nF, see Figure 3 and Figure 4
C
LOAD
= 2.2 nF, see Figure 3 and Figure 4
C
LOAD
= 2.2 nF, see Figure 3 and Figure 4
See Figure 2
See Figure 2
25
25
30
35
45
75
ns
ns
ns
ns
ns
ns
ns
°C
°C
°C
°C
V
T
W
T
SD
T
HYS_SD
T
HYS_W
V
OTW_OL
See Figure 6
See Figure 6
See Figure 6
See Figure 6
Open drain, −500 µA
120
150
135
165
30
10
150
180
0.4
All limits at temperature extremes guaranteed via correlation using standard statistical quality control (SQC) methods.
Rev. A | Page 3 of
16
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
TIMING
SD
t
dL_SD
t
dH_SD
90%
10%
08132-002
OUTA,
OUTB
Figure 2. Shutdown Timing Diagram
INA,
INB
V
IH
V
IL
t
D1
t
RISE
t
D2
t
FALL
90%
OUTA,
OUTB
10%
90%
10%
08132-003
Figure 3. Output Timing Diagram (Noninverting)
INA,
INB
V
IL
V
IH
t
D1
t
RISE
t
D2
t
FALL
90%
OUTA,
OUTB
10%
90%
10%
08132-003
Figure 4. Output Timing Diagram (Inverting)
V
UVLO_ON
V
UVLO_OFF
V
DD
UVLO MODE
OUTPUTS DISABLED
NORMAL OPERATION
UVLO MODE
OUTPUTS DISABLED
Figure 5. UVLO Function
Rev. A | Page 4 of
16
08132-005
ADP3623/ADP3624/ADP3625/ADP3633/ADP3634/ADP3635
T
SD
T
SD
–
T
HYS_SD
T
W
T
W
–
T
HYS_W
T
J
NORMAL OPERATION
OT WARNING
OUTPUTS
ENABLED
OTW
OT SHUTDOWN
OUTPUTS
DISABLED
OT WARNING
OUTPUTS
ENABLED
08132-006
NORMAL OPERATION
Figure 6. Overtemperature Warning and Shutdown
Rev. A | Page 5 of
16
