LT1937 LINER [Linear Technology], LT1937 Datasheet - Page 3

• Manufacturer Part Number: LT1937
• Description: 20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN
• Manufacturer: LINER [Linear Technology]

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
Switch Leakage Current
Schottky Forward Voltage
Schottky Reverse Leakage
PMOS Disconnect V
CTRL2 to FB2 Offset
Maximum Shunt Current
ELECTRICAL CHARACTERISTICS
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 specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C junction
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
temperature range, otherwise specifi cations are at T
CESAT
CAP2
– V
OUT2
CONDITIONS
V
I
V
V
After Start-Up
During Start-Up (Note 4)
V
I
V
I
V
I
V
V
SCHOTTKY1
SW2
SCHOTTKY2
OUT2
SW1
REVERSE1
CTRL2
FB2
SW2
REVERSE2
CTRL2
FB2
= 1.5V
= 200mA
= 1.3V
= 16V
= 16V
= 10mA, V
= 3V (Note 3)
= 0.5V
A
= 25°C, V
= 20V
= 20V
= 100mA
= 100mA
The
CAP2
●
IN
= 5V
denotes the specifi cations which apply over the full operating
= 3V, V
Note 3: Internal reference voltage is determined by fi nding V
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
overriding the internal reference, start-up mode occurs when V
then half the voltage of the internal reference.
CTRL1
= V
CTRL2
FB2
is less then half the voltage on CTRL2. If CTRL2 is not
= 3V.
●
●
●
MIN
1.18
177
180
26
15
1.215
TYP
182
150
300
260
800
250
220
0.1
0.8
0.1
27
20
1
8
LT3498
MAX
1.25
186
400
28
30
15
5
6
5
2
FB2
FB2
voltage
is less
UNITS
3
3498f
mA
mV
mV
mV
mV
kΩ
µA
µA
µA
µA
µA
ns
µs
µs
V
V
V