AAT4900
Buffered Power Half-Bridge
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689 4900.2000.9.0.71
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 on-
resistance 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.
Features
•=2.7V to 5.5V Input voltage range
•=120mΩ (typ) Switch RDS(ON)
•=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
Typical Applications
Advanced Information
AAT4900
EN
IN
OUT
CLK
GND
ENABLE
2.7V to 5.5V Input
OUTPUT
5
3
1
2
4
Control Circuit
(PWM Output)
SOT-23
DC/DC Converter Output Stage
8-1
FastSwitchTM
AAT4900
Buffered Power Half-Bridge
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689 4900.2000.9.0.71
Absolute Maximum Ratings (TA=25°C unless otherwise noted)
Symbol Description Value Units
VIN IN to GND -0.3 to 6 V
VEN, VCLK EN, CLK to GND -0.3 to
VIN+0.3 V
VOUT OUT to GND -0.3 to
VIN+0.3 V
IMAX Maximum Continuous Switch Current TBD A
TJ Operating Junction Temperature Range -40 to 150 °C
ΘJA Maximum Thermal Resistance 260 °C/W
PD Maximum Power Dissipation 380 mW
TLEAD Maximum Soldering Temperature (at Leads) 300 °C
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.
Electrical Characteristics (VIN = 5V, TA = -40 to 85°C unless otherwise noted. Typical values are
at TA=25°C)
Symbol Description Conditions Min Typ Max Units
VIN Operation Voltage 2.7 5.5 V
IQAC AC Quiescent Current IN = 5V, EN = IN,
CLK = 1MHz, IOUT = 0 1 mA
IQDC DC Quiescent Current IN = 5V, EN = IN,
CLK = GND, IOUT = 0 1 µA
IQ(OFF) Off-Supply Current EN = CLK = GND
IN = OUT = 5.5V 1 µA
ISD(OFF) Off-Switch Current EN = GND, IN = 5.5V,
VOUT=0, or OUT = IN 0.03 15 µA
IN = 4.5V 120 mΩ
RDS(ON)H High Side MOSFET On Resistance IN = 3.0V 140 mΩ
IN = 4.5V 120 mΩ
RDS(ON)L Low Side MOSFET On Resistance IN = 3.0V 140 mΩ
VONL CLK, EN Input low Voltage 0.8 V
IN = 2.7V to 3.6V 2.0 V
VONH CLK, EN Input High Voltage IN = 4.5V to 5.5V 2.4 V
ISINK CLK, EN Input leakage CLK, EN = 5.5v 0.01 1 µA
CLK rising 5 ns
TBBM Break Before Make Time CLK falling 5 ns
CLK rising 60 ns
TON-DLY CLK to OUT delay CLK falling 80 ns
CLK = GND 75 ns
THIZ EN to OUT HiZ delay CLK = IN 75 ns
8-2
AAT4900
Buffered Power Half-Bridge
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689 4900.2000.9.0.71
Functional Block Diagram
Ordering Information
Part Number
Package Marking Bulk Tape and Reel
SOT-23-5 N/A AAT4900IGV-T1
8-3
Control Logic
and
Shoot-through
Protection
CLK
EN
IN
OUT
GND
AAT4900
Buffered Power Half-Bridge
Advanced Analogic Technologies, Inc.
1250 Oakmead Pkwy, Suite 310, Sunnyvale, CA 94086
(408)524-9684 Fax (408)524-9689 4900.2000.9.0.71
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