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AAT1235 Datasheet, PDF (4/21 Pages) Advanced Analogic Technologies – High Efficiency White LED Drivers for Backlight and Keypad
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AAT1235
High Efficiency White LED Drivers
for Backlight and Keypad
Electrical Characteristics1
VIN = 3.6V; CIN = 2.2µF;TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Power Supply
VIN
VOUT(MAX)
Description
Input Voltage Range
Maximum Output Voltage
VUVLO
UVLO Threshold
ICC
ISHDN(MAX)
IOX
IDX
IDX-Matching
Operating Current (No Switching)
IN Pin Shutdown Current
Maximum Continuous Output Current
Current Sink Accuracy
Current Matching Between Any
Sink Channels
TSS
Soft-Start Time
VOV
OVP Threshold Voltage
OVP Threshold Hysteresis
RDS(ON)N
RDS(ON)IN
ISET
ILIMIT
EN/SET Input
Low Side Switch On Resistance
Input Disconnect Switch
Current Set Ratio
Input Switch Current Limit
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
TEN/SET LO
EN/SET Low Time
TEN/SET HI
EN/SET High Time
TOFF
EN/SET Off Timeout
TLAT
EN/SET Latch Timeout
IEN/SET
EN/SET Input Leakage
Thermal Protection
TJ-TH
TJ-HYS
TJ Thermal Shutdown Threshold
TJ Thermal Shutdown Hysteresis
Conditions
Min
2.7
VIN Rising
Hysteresis
VIN Falling
1.8
B1 = B2 = A1 = A2 = A3 = 1.2V,
2mA Setting, RSET = 226kΩ
EN = GND
VO = 24V
100
RSET = 22.6kΩ
18
RSET = 22.6kΩ,
A1 = A2 = A3 = B1 = B2 = 0.4V
From Enable to Output
Regulation; VFB = 300mV
VOUT Rising
1.1
IOUT = 100mA
IOUT = 100mA
ISINK/IRSET, VRSET = 0.6V
1.2
1.4
0.3
VEN/SET = VIN = 5V
-1
Typ
150
20
2
300
1.2
100
80
200
760
140
15
Max Units
5.5
V
24
V
2.7
V
mV
V
300 µA
1.0 µA
mA
22 mA
5
%
µs
1.3
V
mV
mΩ
mΩ
A/A
A
0.4
V
V
75 µs
75 µs
500 µs
500 µs
1
µA
°C
°C
1. The AAT1235 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range is assured by
design, characterization, and correlation with statistical process controls.
4
1235.2007.02.1.1
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