PRODUCT DATASHEET
AAT1218
TM
SwitchReg
1A, 1.2MHz Synchronous Boost Converter
Electrical Characteristics
VIN = 1.2V, TA = 25°C unless otherwise noted.
Symbol
Description
Conditions
Min
Typ
Max Units
Minimum Start-Up Voltage
Minimum Start-Up Voltage Loaded
Operating Input Voltage Range
Output Voltage Range
ILOAD = 1mA
ILOAD = 300mA (Resistive)
TA = -40°C to +85°C
0.85
1.4
1
V
V
V
V
V
VIN
0.5
5.5
VOUT_RANGE
VFB
2.5
Feedback Voltage
VFB = 1.2V, TA = -40°C to +85°C
1.164 1.200 1.236
Quiescient Current
Switching, No Load Operation,
Measured from VOUT
0.5 < VIN < VOUT - 0.5V, ILOAD = 0mA
300
700
μA
IQ
Quiescient Current
Device Disabled (Shut Down)
Switching Frequency
Minimum Operating Duty Cycle
Maximum Operating Duty Cycle
NMOS Current Limit
Soft-Start Time
NMOS Switch Leakage
PMOS Switch Leakage
0.5 < VIN < VOUT - 0.5V, VEN = 0
0.01
1.2
1
μA
FOSC
DC
0.95
1.5
0
MHz
%
%
80
2.0
ILIMIT
TSS
NMOS Leakage
PMOS Leakage
TA = -40°C to +85°C
VIN = 3.3V, VOUT = 5V, COUT = 10μF
2.5
0.7
0.1
0.1
180
250
A
ms
μA
μA
mΩ
mΩ
5.0
5.0
NMOS On-Resistance NMOS Switch On-Resistance
PMOS On-Resistance PMOS Switch On-Resistance
VIN = 1.5 - (VOUT - 0.5),
ILOAD = 0mA to 1000mA
VIN = 1.5 - (VOUT - 0.5),
ILOAD = 0mA to 1000mA
ΔVOUT
Line Regulation
0.1
0.5
%
ΔVOUT
Load Regulation
%
VIN = 2.5V - 4.5V, ΔVIN = 1V,
dVIN/dt = ±0.2V/μs, COUT = 22μF
ILOAD = 50mA to 500mA,
dILOAD/dt = ±0.5A/μs, COUT = 22μF
ΔVOUT(LINE_TRANSIENT)
ΔVOUT(LOAD_TRANSIENT)
Line Transient Response
Load Transient Response
-3
3
% VOUT
% VOUT
-10
10
VIN = 1.0 - (VOUT-0.5), ILOAD = 0mA
to 1000mA, COUT = 22μF, Measured
Bandwidth = 20MHz
ΔVOUT(AC)
Output Ripple
100
0.6
mVpp
EN
VEN(L)
VEN(H)
IEN
Logic Input Low Threshold for EN
Logic Input High Threshold for EN
Enable Input Low Current
V
V
VOUT = 3.3V
VOUT = 5.0V
VIN = VOUT = 5.5V
1.0
1.4
-1.0
1.0
μA
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1218.2008.10.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
