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AAT4900
Buffered Power Half-Bridge
General Description
The AAT4900 FastSwitch is a member of
AnalogicTech’s Application Specific Power
MOSFET (ASPM) product family. It is a
Buffered Power Half-Bridge, consisting of low onresistance Power MOSFETs with integrated
control logic. This device operates with inputs
ranging from 2.7V to 5.5V, making it ideal for both
3V and 5V systems. The device is protected from
shoot-through current with its own control
circuitry. The AAT4900 is capable of very fast
switching times and is ideal for use in high
frequency DC to DC Converters. The quiescent
supply current is a low 1mA (max) at 1MHz CLK
frequency. In shutdown mode, the supply current
decreases to 1µA max
The AAT4900 is available in 5 pin SOT-23
specified over -40 to 85°C.
FastSwitch
Features
•= 2.7V to 5.5V Input voltage range
•= 120mΩ (typ) Switch R
•= Low quiescent current
•= 1µA (max) DC
•= 1mA (max) at 1MHz
•= Only 2.5V needed for Control Signal Input
•= Temp range -40 to 85°C
•= 5 pin SOT-23 package
Applications
•= High frequency DC/DC converters
•= Low-side MOSFET gate driver
DS(ON)
TM
Advanced Information
Typical Applications
DC/DC Converter Output Stage
Control Circuit
(PWM Output)
ENABLE
4
3
CLK
EN
2.7V to 5.5V Input
5
IN
AAT4900
SOT-23
GND
2
OUTPUT
OUT
1
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689
8-1
4900.2000.9.0.71
Page 2
AAT4900
Buffered Power Half-Bridge
Absolute Maximum Ratings (T
Symbol Description Value Units
VIN IN to GND -0.3 to 6 V
VEN, V
CLK
V
OUT
I
MAX
TJ Operating Junction Temperature Range -40 to 150
Θ
JA
PD Maximum Power Dissipation 380 mW
T
LEAD
Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at
conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one
time.
EN, CLK to GND
OUT to GND
Maximum Continuous Switch Current TBD A
Maximum Thermal Resistance 260
Maximum Soldering Temperature (at Leads) 300
=25°C unless otherwise noted)
A
-0.3 to
V
+0.3
IN
-0.3 to
V
+0.3
IN
V
V
°C
°C/W
°C
Electrical Characteristics (V
at T
=25°C)
A
= 5V, TA = -40 to 85°C unless otherwise noted. Typical values are
IN
Symbol Description Conditions Min Typ Max Units
V
I
QAC
I
QDC
I
Q(OFF)
I
SD(OFF)
R
DS(ON)H
R
DS(ON)L
V
V
ONH
I
SINK
T
BBM
T
ON-DLY
T
ONL
HIZ
Operation Voltage 2.7 5.5 V
IN
AC Quiescent Current
DC Quiescent Current
Off-Supply Current
Off-Switch Current
High Side MOSFET On Resistance
Low Side MOSFET On Resistance
IN = 5V, EN = IN,
CLK = 1MHz, I
OUT
= 0
IN = 5V, EN = IN,
CLK = GND, I
OUT
= 0
EN = CLK = GND
IN = OUT = 5.5V
EN = GND, IN = 5.5V,
=0, or OUT = IN
V
OUT
1 mA
1 µA
1 µA
0.03 15 µA
IN = 4.5V 120
IN = 3.0V 140
IN = 4.5V 120
IN = 3.0V 140
CLK, EN Input low Voltage 0.8 V
CLK, EN Input High Voltage
IN = 2.7V to 3.6V 2.0 V
IN = 4.5V to 5.5V 2.4 V
CLK, EN Input leakage CLK, EN = 5.5v 0.01 1 µA
Break Before Make Time
CLK to OUT delay
EN to OUT HiZ delay
CLK rising 5 ns
CLK falling 5 ns
CLK rising 60 ns
CLK falling 80 ns
CLK = GND 75 ns
CLK = IN 75 ns
mΩ
mΩ
mΩ
mΩ
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689
8-2
4900.2000.9.0.71
Page 3
Functional Block Diagram
CLK
Control Logic
and
Shoot-through
Protection
AAT4900
Buffered Power Half-Bridge
IN
OUT
EN
Ordering Information
Package Marking
SOT-23-5 N/A AAT4900IGV-T1
GND
Part Number
Bulk Tape and Reel
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689
8-3
4900.2000.9.0.71
Page 4
AAT4900
Buffered Power Half-Bridge
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Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689
8-4
4900.2000.9.0.71
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