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AAT4900
Buffered Power Half-Bridge General Description
The AAT4900 FastSwitcha is a member of AnalogicTech's Application Specific Power MOSFETa (ASPMa) 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 1A max The AAT4900 is available in 5 pin SOT-23 specified over -40 to 85C.
Features
*= *= *= *= *= *=
FastSwitch
TM
2.7V to 5.5V Input voltage range 120m (typ) Switch RDS(ON) Low quiescent current *= 1A (max) DC *= 1mA (max) at 1MHz Only 2.5V needed for Control Signal Input Temp range -40 to 85C 5 pin SOT-23 package
Applications
*= *= High frequency DC/DC converters Low-side MOSFET gate driver
Advanced Information
Typical Applications
DC/DC Converter Output Stage
2.7V to 5.5V Input
5
IN
Control Circuit (PWM Output) 4
CLK EN
AAT4900
SOT-23 GND
2
OUT
1
OUTPUT
ENABLE
3
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
AAT4900
Buffered Power Half-Bridge Absolute Maximum Ratings (TA=25C unless otherwise noted)
Symbol
VIN VEN, VCLK VOUT IMAX TJ JA PD TLEAD IN to GND EN, CLK to GND OUT to GND Maximum Continuous Switch Current Operating Junction Temperature Range Maximum Thermal Resistance Maximum Power Dissipation Maximum Soldering Temperature (at Leads)
Description
Value
-0.3 to 6 -0.3 to VIN+0.3 -0.3 to VIN+0.3 TBD -40 to 150 260 380 300
Units
V V V A C C/W mW 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 85C unless otherwise noted.
at TA=25C)
Symbol VIN IQAC IQDC IQ(OFF) ISD(OFF) RDS(ON)H RDS(ON)L VONL VONH ISINK TBBM TON-DLY THIZ Description Operation Voltage AC Quiescent Current DC Quiescent Current Off-Supply Current Off-Switch Current High Side MOSFET On Resistance Low Side MOSFET On Resistance CLK, EN Input low Voltage CLK, EN Input High Voltage CLK, EN Input leakage Break Before Make Time CLK to OUT delay EN to OUT HiZ delay IN = 2.7V to 3.6V IN = 4.5V to 5.5V CLK, EN = 5.5v CLK rising CLK falling CLK rising CLK falling CLK = GND CLK = IN 2.0 2.4 0.01 5 5 60 80 75 75 IN = 5V, EN = IN, CLK = 1MHz, IOUT = 0 IN = 5V, EN = IN, CLK = GND, IOUT = 0 EN = CLK = GND IN = OUT = 5.5V EN = GND, IN = 5.5V, VOUT=0, or OUT = IN IN = 4.5V IN = 3.0V IN = 4.5V IN = 3.0V Conditions Min 2.7 Typ
Typical values are
Max 5.5 1 1 1
Units V mA A A A m m m m V V V A ns ns ns ns ns ns
0.03 120 140 120 140
15
0.8
1
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
AAT4900
Buffered Power Half-Bridge
Functional Block Diagram
IN
CLK
Control Logic and Shoot-through Protection
OUT
EN
GND
Ordering Information
Package SOT-23-5 Marking Part Number Bulk N/A Tape and Reel AAT4900IGV-T1
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
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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