24V 100mA Step-Up Converter
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C, V
IN
= 3.6V.
Symbol
Power Supply
V
IN
V
OUT(MAX)
V
UVLO
AAT1232
Description
Input Voltage Range
Maximum Output Voltage
UVLO Threshold
Conditions
Min
2.7
Typ
Max
5.5
24
2.7
Units
V
V
V
mV
V
mA
I
Q
I
SHDN
I
OUT
FB1
FB2
ΔV
LOADREG
ΔV
LINEREG
/ΔV
IN
R
DS(ON)L
R
DS(ON)IN
T
SS
T
SD
T
HYS
I
LIM
SEL, EN/SET
V
SEL(L)
V
SEL(H)
V
EN/SET(L)
V
EN/SET(H)
T
EN/SET LO
T
EN/SET HI MIN
T
EN/SET HI MAX
T
OFF
T
LAT
I
EN/SET
Quiescent Current
V
IN
Pin Shutdown Current
Output Current
FB1 Reference Voltage
FB2 Reference Voltage
Load Regulation
Line Regulation
Low Side Switch On Resistance
Input Disconnect Switch
On Resistance
Soft-Start Time
Over-Temperature Shutdown
Threshold
Shutdown Hysteresis
N-Channel Current Limit
SEL Threshold Low
SEL Threshold High
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
V
IN
Rising
Hysteresis
V
IN
Falling
SEL = GND, V
OUT
= 18V,
I
OUT
= 0, R3 = 20kΩ
2
, Switching
SEL = GND, FB2 = 1.5V,
Not Switching
EN/SET = GND
2.7V < V
IN
< 5.5V, V
OUT
= 24V
I
OUT
= 0 to 100mA, V
IN
= 2.7V
to 5.0V, SEL = High
I
OUT
= 0 to 100mA, V
IN
= 2.7V
to 5.0V, SEL = Low
I
OUT
= 0 to 100mA, R3 = 20kΩ
3
V
IN
= 2.7V to 5.5V, R3 = 20kΩ
3
150
1.8
0.3
40
70
1.0
100
1.164
0.582
1.2
0.6
0.02
0.6
0.08
0.18
1.236
0.618
µA
µA
mA
V
V
%/mA
%/V
Ω
Ω
ms
°C
°C
A
From Enable to Output
Regulation; V
OUT
= 15V
0.35
140
V
IN
= 3.6V
V
IN
V
IN
V
IN
V
IN
=
=
=
=
2.7V
5.5V
2.7V
5.5V
15
3.0
0.4
1.4
0.4
1.4
0.3
50
75
500
500
1
75
-1
V
V
V
V
µs
ns
µs
µs
µs
µA
1. The AAT1232 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.
2. Switching input current will vary with R1, R2, R3 resistor values.
3. Some improvement in line and load regulation is possible with smaller resistor values.
4
1232.2006.12.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
