Boost Converter with USB Power Switch
Electrical Characteristics
1
V
CC
= V
IN
= 3.6V, V
OUT1
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
IN,
V
CC
V
OUTx
V
UVLO
I
Q
AAT1275
Description
Operating Input Voltage Range
Maximum Output Voltage Range
Under-Voltage Lockout
Quiescent Supply Current
Conditions
Min
2.7
Typ Max Units
5.0
5.5
2.7
100
45
90
1.0
500
V
V
V
µA
µA
mA
A
V
%
%/mA
%/V
mΩ
mΩ
mΩ
µs
%
MHz
0.2
625
Ω
mA
mA
µs
ms
µs
V
µA
ms
V
V
µA
°C
°C
I
SHDN
Shutdown Current
Boost Converter
I
O
Continuous Output Current
I
LIMIT
Input Switch Current Limit
V
FB
FB Pin Regulation
V
OUT
ΔV
OUT
(V
OUT
*ΔV
IN
)
ΔV
OUT
/V
OUT
R
DS(ON)H
R
DS(ON)L
R
DS(ON)_IN
T
SS
η
F
OSC
Load Switch
R
DS(ON)
I
LIM
I
LIM(MIN)
T
RESP
T
ON
T
OFF
V
FLT_LOW
I
FLT
T
BLANK
Control
V
TH-L
V
TH-H
I
EN
T
J-TH
T
J-HYS
Output Voltage Tolerance
Load Regulation
Line Regulation
High Side Switch On Resistance
Low Side Switch On Resistance
Input Disconnect Switch
Soft-Start Time
Efficiency
Switching Frequency
Current Limit Switch On Resistance
Current Limit
Minimum Current Limit
Current Limit Response Time
Turn-On Delay Time
Turn-Off Delay Time
FLT Logic Output Low
FLT Logic Output High Leakage Current
Fault Blanking Time
EN Threshold Low
EN Threshold High
EN Input Leakage
TJ Thermal Shutdown Threshold
TJ Thermal Shutdown Hysteresis
No Load, Switching
No Load, Not Switching, V
FB
= 1.5V
EN = GND
3V < V
IN
< 5V, V
O
= 5V
No Load, T
A
= 25°C
I
LOAD
= 0 to 500mA,
V
IN
= 2.7V to 5V
I
LOAD
= 0 to 500mA
V
IN
= 2.7V to 5V
V
OUT1
= 5V, I
OUT1
= 500mA
V
OUT1
= 5V, I
OUT1
= 500mA
V
OUT1
= 5V, I
OUT1
= 500mA
From Enable to Output
Regulation
I
OUT1
= 250mA, L = 2.2µH,
V
IN
= 3.6V, V
OUT1
= 5V
T
A
= 25°C, I
OUT1
= 500mA,
V
IN
= 3.6V, V
OUT1
= 5V
V
OUT1
= 5V, T
A
= 25°C
0.591
-3
2.5
0.6
0.609
3
0.005
0.2
200
170
170
300
90
2.0
V
OUT1
= 5V
V
OUT1
= 5V, R
L
= 10Ω
V
OUT1
= 5V, R
L
= 10Ω
I
SINK
= 1mA
V
FAULT
= 5V
Rising and Falling Edge
500
100
0.4
4
10
0.5
4
0.4
1
0.4
V
EN
= 5V, V
IN
= 5V
1.4
-1
140
15
1
1. The AAT1275 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
4
1275.2007.01.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
