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AAT1151 Datasheet(PDF) 4 Page - Advanced Analogic Technologies

Part No. AAT1151
Description  850kHz 700mA Synchronous Buck DC/DC Converter
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Maker  ANALOGICTECH [Advanced Analogic Technologies]
Homepage  http://www.analogictech.com
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AAT1151 Datasheet(HTML) 4 Page - Advanced Analogic Technologies

 
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AAT1151
850kHz 700mA Synchronous
Buck DC/DC Converter
4
1151.2007.01.1.6
Electrical Characteristics1
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
Input Voltage Range
2.7
5.5
V
VOUT
Output Voltage Tolerance
VIN = VOUT + 0.2 to 5.5V,
-3.0
+3.0
%
IOUT = 0 to 700mA
VUVLO
Under-Voltage Lockout
VIN Rising
2.5
V
VIN Falling
1.2
VUVLO(HYS)
Under-Voltage Lockout Hysteresis
250
mV
IIL
Input Low Current
VIN = VFB = 5.5V
1.0
μA
IIH
Input High Current
VIN = VFB = 0V
1.0
μA
IQ
Quiescent Supply Current
No Load, VFB = 0V, VIN = 4.2V
210
300
μA
TA = 25°C
ISHDN
Shutdown Current
VEN = 0V, VIN = 5.5V
1.0
μA
ILIM
Current Limit
TA = 25°C
1.2
A
RDS(ON)H
High Side Switch On Resistance
TA = 25°C
110
150
m
Ω
RDS(ON)L
Low Side Switch On Resistance
TA = 25°C
100
150
m
Ω
η
Efficiency
IOUT = 300mA, VIN = 3.5V
92
%
ΔVOUT (VOUT*ΔVIN) Load Regulation
VIN = 4.2V, ILOAD = 0 to 700mA
±0.9
%
ΔVOUT/VOUT
Line Regulation
VIN = 2.7V to 5.5V
±0.1
%/V
FOSC
Oscillator Frequency
TA = 25°C
600
850
1200
kHz
VEN(L)
Enable Threshold Low
0.6
V
VEN(H)
Enable Threshold High
1.4
V
TSD
Over-Temperature Shutdown
140
°C
Threshold
THYS
Over-Temperature Shutdown
15
°C
Hysteresis
1. The AAT1151 is guaranteed to meet performance specifications over the -40°C to +85°C operating range and is assured by design,
characterization, and correlation with statistical process controls.


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