AAT1232
24V 100mA Step-Up Converter
Electrical Characteristics1
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.6V.
Symbol
Description
Conditions
Min Typ Max Units
Power Supply
VIN
Input Voltage Range
2.7
5.5
24
V
V
VOUT(MAX)
Maximum Output Voltage
VIN Rising
Hysteresis
VIN Falling
2.7
V
VUVLO
UVLO Threshold
Quiescent Current
150
mV
V
1.8
SEL = GND, VOUT = 18V,
0.3
40
mA
µA
2
I
OUT = 0, R3 = 20kΩ , Switching
IQ
SEL = GND, FB2 = 1.5V,
Not Switching
70
ISHDN
IOUT
VIN Pin Shutdown Current
Output Current
EN/SET = GND
1.0
µA
2.7V < VIN < 5.5V, VOUT = 24V
100
mA
I
OUT = 0 to 100mA, VIN = 2.7V
to 5.0V, SEL = High
OUT = 0 to 100mA, VIN = 2.7V
FB1
FB2
FB1 Reference Voltage
FB2 Reference Voltage
1.164 1.2 1.236
0.582 0.6 0.618
V
V
I
to 5.0V, SEL = Low
3
ΔVLOADREG
ΔVLINEREG/ΔVIN
RDS(ON)L
Load Regulation
IOUT = 0 to 100mA, R3 = 20kΩ
VIN = 2.7V to 5.5V, R3 = 20kΩ
0.02
0.6
%/mA
%/V
Ω
3
Line Regulation
Low Side Switch On Resistance
Input Disconnect Switch
On Resistance
0.08
RDS(ON)IN
TSS
0.18
0.35
140
Ω
From Enable to Output
Regulation; VOUT = 15V
Soft-Start Time
ms
°C
Over-Temperature Shutdown
Threshold
TSD
THYS
ILIM
Shutdown Hysteresis
N-Channel Current Limit
15
°C
A
VIN = 3.6V
3.0
SEL, EN/SET
VSEL(L)
SEL Threshold Low
VIN = 2.7V
VIN = 5.5V
VIN = 2.7V
VIN = 5.5V
0.4
V
V
VSEL(H)
SEL Threshold High
1.4
0.4
1.4
VEN/SET(L)
VEN/SET(H)
TEN/SET LO
TEN/SET HI MIN
TEN/SET HI MAX
TOFF
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
V
V
0.3
75
µs
ns
µs
µs
µs
µA
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
50
75
500
500
1
TLAT
EN/SET Latch Timeout
EN/SET Input Leakage
IEN/SET
-1
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 ]
