LT3498
ELECTRICAL CHARACTERISTICS
PARAMETER
Switch Leakage Current
CAP1 Pin Overvoltage Protection
Schottky Forward Voltage
Schottky Reverse Leakage
OLED Driver
Feedback Voltage
Feedback Resistor
Minimum Switch Off Time
Minimum Switch Off Time
Maximum Switch Off Time
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
Schottky Forward Voltage
Schottky Reverse Leakage
PMOS Disconnect V
CAP2
– V
OUT2
CTRL2 to FB2 Offset
Maximum Shunt Current
I
SW2
= 200mA
V
SW2
= 16V
I
SCHOTTKY2
= 100mA
V
REVERSE2
= 20V
I
OUT2
= 10mA, V
CAP2
= 5V
V
CTRL2
= 0.5V
V
FB2
= 1.3V
250
8
220
15
After Start-Up
During Start-Up (Note 4)
V
FB2
= 1.5V
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3V, V
CTRL1
= V
CTRL2
= 3V.
CONDITIONS
V
SW1
= 16V
26
I
SCHOTTKY1
= 100mA
V
REVERSE1
= 20V
V
CTRL2
= 3V (Note 3)
●
●
MIN
TYP
0.1
27
0.8
MAX
5
28
6
UNITS
µA
V
V
µA
V
kΩ
ns
µs
1.18
177
1.215
182
150
1
1.25
186
15
180
20
300
260
0.1
800
30
400
5
2
µs
mA
mV
µA
mV
µA
mV
mV
µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LT3498 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C junction
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3:
Internal reference voltage is determined by finding V
FB2
voltage
level which causes quiescent current to increase 20µA above “Not
Switching” level.
Note 4:
If CTRL2 is overriding the internal reference, start-up mode
occurs when V
FB2
is less then half the voltage on CTRL2. If CTRL2 is not
overriding the internal reference, start-up mode occurs when V
FB2
is less
then half the voltage of the internal reference.
3498f
3
LINER [ LINEAR TECHNOLOGY ]
