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| AAT1152 Datasheet, PDF (4/18 Pages) Advanced Analogic Technologies – 850kHz 1A Synchronous Buck DC/DC Converter | |||
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AAT1152
850kHz 1A Synchronous Buck DC/DC Converter
Electrical Characteristics (VIN = VCC = VP = 5V, TA= -40 to 85°C unless otherwise noted. Typical
values are at TA = 25°C)
Symbol
Description
Conditions
Min Typ Max Units
VIN
VOUT
Operation Voltage
DC Output Voltage Tolerance
2.7
IOUT = 500mA
TA = 25°C
Full temp
-1.0
-2.0
5.5
V
+1.0
+2.0
%
ILIM
Current Limit
TA = 25°C
1.2
A
IQ
Quiescent Supply Current
No load, VFB = 0
160 300 µA
âVOUT (VOUT*âVIN) Load Regulation
VIN = 4.2V, ILOAD = 0 to 1A
3
%
âVOUT/VOUT
Line Regulation
VIN = 2.7 to 5.5V
0.2
%/V
FOSC
Oscillator frequency
TA = 25°C
700 850 1000 kHz
RDSON(H)
High-side Switch On-resistance TA = 25°C
110 150 mâ¦
RDSON(L)
Low-side Switch On-resistance TA = 25°C
100 150 mâ¦
VEN(H)
Enable input high voltage
VIN = 2.7 to 5.5V
1.4
V
VEN(L)
Enable input low voltage
VIN = 2.7 to 5.5V
0.6
V
IEN
Enable Pin Leakage Current
VEN = 5.5V
1
µA
VUVLO
Undervoltage Lockout
VIN rising
VIN falling
1.2
2.5
V
VUVLO(hys)
Undervoltage Lockout Hysteresis
250
mV
TSD
Over Temp Shutdown Threshold
140
°C
THYS
Over Temp Shutdown Hysteresis
15
°C
ISHDN
Shutdown current
VEN = 0, VIN = 5.5V
1
µA
VTH(POK)
Power Good Threshold
VFB Ramping Up
VFB Ramping Down
90
% of
88
VFB
RPOK
Power Good Pull-Down
4
â¦
On-Resistance
4
1152.2003.01.0.9
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