600mA, 1.2MHz, Micropower
Synchronous Step-Up Converter
Electrical Characteristics
1
Symbol
V
IN
V
OUT
V
FB
∆V
OUT
/V
OUT
/
∆V
IN
∆V
OUT
/V
OUT
/
∆I
OUT
I
Q
I
LNMOS
I
LPMOS
AAT1217
V
IN
= 1.2V, V
OUT
= 3.3V, T
A
= 25°C, unless otherwise noted.
Description
Minimum Start-Up Voltage
Minimum Operating Voltage
Output Voltage Range
Output Voltage Accuracy
3
Reference Voltage
Reference Voltage Line
Regulation
Reference Voltage Load
Regulation
Quiescent Current (Shutdown)
Quiescent Current (Active)
Quiescent Current (Active)
NMOS Switch Leakage
PMOS Switch Leakage
I
OUT
= 1mA
V
SHDN
= V
IN
Conditions
Min
2.5
-4
1.192
0.85
0.5
1.230
0.2
0.4
0.003
0.004
0.01
115
Typ
R
DS(ON)L
R
DS(ON)H
I
CL
∆t(I
CL
)
D
MAX
F
OSC
V
SHDN
I
SHDN
T
SD
NMOS Switch ON Resistance
PMOS Switch ON Resistance
NMOS Current Limit
Current Limit Delay to Output
Maximum Duty Cycle
Switching Frequency
SHDN Input Low
SHDN Input High
SHDN Input Current
Thermal Shutdown
I
OUT
= 10mA; T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
V
IN
= 1.2V to 2.4V, I
OUT
= 10mA,
V
OUT
= 3.3V
V
IN
= 2.4V to 4.2V, I
OUT
= 10mA,
V
OUT
= 5.0V
V
IN
= 1.2V, I
OUT
= 10mA to 100mA
V
OUT
= 3.3V
V
IN
= 3.6V, I
OUT
= 10mA to 400mA
V
OUT
= 5.0V
V
SHDN
= 0
V
IN
= 1.8V, Current from input voltage
source. V
SHDN
= V
IN
Measured on V
OUT
, V
SHDN
= V
IN
V
SW
= 5V
V
SW
= 0V
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 5V
V
FB
= 1.15V, T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
V
SHDN
= 5.5V
Hysteresis
1
0.65
5.5
+4
1.268
Max
Units
V
%
V
%/V
V
%/mA
1
500
5
5
750
80
0.9
1.00
300
0.1
0.1
0.35
0.30
0.60
0.55
1200
40
85
1.2
0.01
160
20
µA
µA
µA
Ω
Ω
1.5
0.35
1
mA
ns
%
MHz
µA
°C
V
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 ]
