LTC3786 LINER [Linear Technology], LTC3786 Datasheet - Page 5

• Manufacturer Part Number: LTC3786
• Description: Multi-Phase Current Mode Step-Up DC/DC Controller
• Manufacturer: LINER [Linear Technology]

elecTrical characTerisTics
SYMBOL
t
t
t
Gate Driver
R
Overvoltage
V
specified operating junction temperature range, otherwise specifications are at T
otherwise noted.
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: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3: The LTC3862E-2 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3862I-2 is guaranteed over the
full –40°C to 125°C operating temperature range and the LTC3862H-2 is
guaranteed over the full –40°C to 150°C operating temperature range.
High junction temperatures degrade operating lifetimes. Operating lifetime
is derated at junction temperatures greater than 125°C.
ON(MIN)1
ON(MIN)2
ON(MIN)3
FB(OV)
DS(ON)
PARAMETER
Minimum On-Time
Minimum On-Time
Minimum On-Time
Driver Pull-Up R
Driver Pull-Down R
V
FB
, Overvoltage Lockout Threshold
DS(ON)
DS(ON)
CONDITIONS
V
V
V
V
BLANK
BLANK
BLANK
FB(OV)
(Notes 2, 3) The
= 0V (Note 8)
= Float (Note 8)
= 3V8 (Note 8)
– V
FB(NOM)
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Continuous
operation above the specified maximum operating junction temperature
may impair device reliability.
Note 5: Supply current in normal operation is dominated by the current
needed to charge the external MOSFET gates. This current will vary with
supply voltage and the external MOSFETs used.
Note 6: The IC is tested in a feedback loop that adjusts V
specified error amplifier output voltage.
Note 7: Guaranteed by design, not subject to test.
Note 8: The minimum on-time condition is specified for an inductor peak-
to-peak ripple current = 30% (see Minimum On-Time Considerations in the
Applications Information section).
Note 9: The maximum duty cycle limit is derived from an internal
clock that runs at 12× the programmed switching frequency. See the
Applications Information section for additional information.
in Percent
l
denotes the specifications which apply over the
A
= 25°C. V
IN
= 12V, RUN = 2V and SS = open, unless
MIN
8
LTC3862-2
TYP
210
290
375
0.9
10
3
FB
MAX
12
to achieve a
UNITS
38622f
5
ns
ns
ns
%
Ω
Ω