AAT1152 Ver la hoja de datos (PDF) - Advanced Analogic Technologies
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AAT1152 Datasheet PDF : 17 Pages
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AAT1152
850kHz 1A Buck DC/DC Converter
Electrical Characteristics
VIN = VCC = VP = 5V, TA= -40°C 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
ΔVOUT (VOUT*ΔVIN) Load Regulation
VIN = 4.2V, ILOAD = 0 to 1A
3
%
ΔVOUT/VOUT
Line Regulation
VIN = 2.7V 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 mΩ
RDSON(L)
Low-Side Switch On Resistance TA = 25°C
100 150 mΩ
VEN(H)
Enable Input High Voltage
VIN = 2.7V to 5.5V
1.4
V
VEN(L)
Enable Input Low Voltage
VIN = 2.7V to 5.5V
0.6
V
IEN
Enable Pin Leakage Current
VEN = 5.5V
1
μA
VUVLO
Under-Voltage Lockout
VIN Rising
VIN Falling
2.5
V
1.2
VUVLO(hys)
Under-Voltage Lockout Hysteresis
250
mV
TSD
Over-Temperature Shutdown
140
°C
Threshold
THYS
Over-Temperature Shutdown
Hysteresis
15
°C
ISHDN
VTH(POK)
RPOK
Shutdown Current
Power-OK Threshold
Power-OK Pull-Down
On Resistance
VEN = 0, VIN = 5.5V
VFB Ramping Up
VFB Ramping Down
1
μA
90
% of
88
VFB
4
Ω
4
1152.2006.09.1.7
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