AAT1217
600mA, 1.2MHz, Micropower
Synchronous Step-Up Converter
1
Electrical Characteristics
VIN = 1.2V, VOUT = 3.3V, TA = 25°C, unless otherwise noted.
Symbol
Description
Conditions
Min Typ Max Units
Minimum Start-Up Voltage
Minimum Operating Voltage
Output Voltage Range
Output Voltage Accuracy
Reference Voltage
IOUT = 1mA
VSHDN = VIN
0.85
0.5
1
VIN
V
0.65
5.5
+4
2.5
-4
V
%
V
VOUT
VFB
3
IOUT = 10mA; TA = -40°C to +85°C
TA = -40°C to +85°C
1.192 1.230 1.268
V
IN = 1.2V to 2.4V, IOUT = 10mA,
0.2
∆VOUT/VOUT
/
/
Reference Voltage Line
Regulation
VOUT = 3.3V
%/V
%/mA
µA
∆VIN
VIN = 2.4V to 4.2V, IOUT = 10mA,
VOUT = 5.0V
0.4
VIN = 1.2V, IOUT = 10mA to 100mA
0.003
0.004
∆VOUT/VOUT
∆IOUT
Reference Voltage Load
Regulation
VOUT = 3.3V
VIN = 3.6V, IOUT = 10mA to 400mA
VOUT = 5.0V
Quiescent Current (Shutdown) VSHDN = 0
Quiescent Current (Active)
0.01
115
1
IQ
VIN = 1.8V, Current from input voltage
source. VSHDN = VIN
Measured on VOUT, VSHDN = VIN
VSW = 5V
Quiescent Current (Active)
NMOS Switch Leakage
PMOS Switch Leakage
300
0.1
0.1
500
5
5
ILNMOS
ILPMOS
µA
µA
VSW = 0V
V
OUT = 3.3V
VOUT = 5V
OUT = 3.3V
0.35
0.30
0.60
0.55
1200
40
RDS(ON)L
NMOS Switch ON Resistance
PMOS Switch ON Resistance
Ω
V
RDS(ON)H
ICL
Ω
VOUT = 5V
NMOS Current Limit
Current Limit Delay to Output
Maximum Duty Cycle
Switching Frequency
SHDN Input Low
750
mA
ns
%
∆t(ICL
)
DMAX
FOSC
VFB = 1.15V, TA = -40°C to +85°C
TA = -40°C to +85°C
80
0.9
85
1.2
1.5
0.35
MHz
VSHDN
V
SHDN Input High
1.00
ISHDN
TSD
SHDN Input Current
VSHDN = 5.5V
Hysteresis
0.01
160
20
1
µA
°C
Thermal Shutdown
1. Specifications over the temperature range are guaranteed by design, characterization, and correlation with statistical process con-
trols.
2. Not including the current into internal resistance divider.
3. For fixed 3.3V and 5.0V output voltage version. The adjustable output voltage is guaranteed by reference voltage accuracy.
4
1217.2007.07.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
