LT3755-1 LINER [Linear Technology], LT3755-1 Datasheet - Page 4

• Manufacturer Part Number: LT3755-1
• Description: 60V 4-Switch Synchronous
• Manufacturer: LINER [Linear Technology]

LT3791
ELECTRICAL CHARACTERISTICS
PARAMETER
Open LED Falling Threshold (V
Open LED Falling Threshold (V
Short LED Falling Threshold (V
OPENLED Pin Output Impedance
SHORTLED Pin Output Impedance
SS Latch-Off Threshold
SS Reset Threshold
Oscillator
Switching Frequency
SYNC Frequency
SYNC Pin Resistance to GND
SYNC Threshold Voltage
Internal V
INTV
Dropout (V
INTV
INTV
PWM
PWM Threshold Voltage
PWM Pin Resistance to GND
PWMOUT Pull-Up Resistance
PWMOUT Pull-Down Resistance
NMOS Drivers
TG1, TG2 Gate Driver On-Resistance
BG1, BG2 Gate Driver On-Resistance
TG Off to BG On Delay
BG Off to TG On Delay
TG1, TG2, t
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 LT3791E is guaranteed to meet performance from 0°C
to 125°C junction temperature. Specification over the -40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls.
The LT3791I is guaranteed to meet performance specifications over the
–40°C to 125°C operating junction temperature range. The LT3791H is
guaranteed to meet performance specifications over the –40°C to 150°C
4
junction temperature range, otherwise specifications are at T
Gate Pull-Up
Gate Pull-Down
Gate Pull-Up
Gate Pull-Down
CC
CC
CC
Regulation Voltage
Undervoltage Lockout
Current Limit
CC
IN
OFF(MIN)
Regulator
– INTV
CC
)
FB
(ISP-ISN)
FB
)
)
)
CONDITIONS
V
R
R
R
I
V
V
V
C
C
R
INTVCC
FB
T
T
T
INTVCC
BST
INTVCC
L
L
T
= 147k
= 59.0k
= 29.1k
= 3300pF
= 3300pF
= 59.0k
= 1.2V
– V
= –10mA, V
= 4V
= 5V
SW
= 5V
The
A
IN
= 25°C (Note 2). V
l
= 5V
denotes the specifications which apply over the full operating
operating junction temperature range. The LT3791MP is guaranteed to
meet performance specifications over the –55°C to 150°C operating
junction temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated for junction temperatures greater
than 125°C.
Note 3: The LT3791 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specified absolute maximum operating junction temperature may
impair device reliability.
IN
= 12V, V
EN/UVLO
l
1.078
MIN
380
190
380
665
200
0.3
4.8
3.1
0.3
5
= 12V unless otherwise noted.
1.75
TYP
400
200
400
700
240
220
1.1
1.1
1.1
3.5
2.6
1.7
1.2
0.2
10
90
67
90
10
60
60
5
5
3
1.122
MAX
450
210
420
735
700
350
260
2.0
2.0
1.5
5.2
3.9
1.5
15
20
10
UNITS
3791f
kHz
kHz
kHz
kHz
mV
mV
mV
mA
kΩ
kΩ
kΩ
kΩ
ns
ns
ns
Ω
Ω
Ω
Ω
Ω
Ω
V
V
V
V
V
V
V