ltc3862gn-1 Linear Technology Corporation, ltc3862gn-1 Datasheet - Page 4

• Manufacturer Part Number: ltc3862gn-1
• Description: Multi-phase Current Mode Step-up Dc/dc Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
LTC3862-1
operating temperature range, otherwise specifi cations are at T
SYMBOL
RUN/Soft-Start
I
V
V
I
R
Oscillator
f
V
f
V
I
CH1-CH2
CH1-CLKOUT
D
t
t
t
Gate Driver
R
Overvoltage
V
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
specifi ed.
Note 3: The LTC3862E-1 is guaranted to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3862I-1 is guaranteed over the
full –40°C to 125°C operating temperature range and the LTC3862H-1 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.
4
RUN
SS
OSC
SYNC
PLLFLTR
ON(MIN)1
ON(MIN)2
ON(MIN)3
RUN
RUNHYS
FREQ
SYNC
FB(OV)
SS
MAX
DS(ON)
PARAMETER
RUN Source Current
High Level RUN Channel Enable Threshold
RUN Threshold Hysteresis
SS Pull-Up Current
SS Pull-Down Resistance
Oscillator Frequency
Oscillator Frequency Range
Nominal FREQ Pin Voltage
SYNC Minimum Input Frequency
SYNC Maximum Input Frequency
SYNC Input Threshold
Phase Detector Sourcing Output Current
Phase Detector Sinking Output Current
Channel 1 to Channel 2 Phase Relationship
Channel 1 to CLKOUT Phase Relationship
Maximum Duty Cycle
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
R
R
R
V
V
Rising Threshold
f
f
V
V
V
V
V
V
V
V
V
V
V
V
V
SYNC
SYNC
RUN
RUN
SS
RUN
SYNC
SYNC
PHASEMODE
PHASEMODE
PHASEMODE
PHASEMODE
PHASEMODE
PHASEMODE
DMAX
DMAX
DMAX
BLANK
BLANK
BLANK
FB(OV)
FREQ
FREQ
FREQ
(Notes 2, 3) The
= 0V
= 0V
= 1.5V
= 0V
> f
< f
= 45.6k
= 45.6k
= 45.6k
= External Clock
= External Clock
= 0V
= Float
= 3V8
A
= 0V (Note 8)
= Float (Note 8)
= 3V8 (Note 8)
– V
OSC
OSC
= 25°C. V
FB(NOM)
= 0V
= Float
= 3V8
= 0V
= Float
= 3V8
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Continuous
operation above the specifi ed 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
specifi ed error amplifi er output voltage.
Note 7: Guaranteed by design, not subject to test.
Note 8: The minimum on-time condition is specifi ed for an inductor peak-
to-peak ripple current = 30% (see Minimum On-Time Considerations in the
Applications Information section).
in Percent
IN
l
= 12V, RUN = 2V and SS = open, unless otherwise noted.
denotes the specifi cations which apply over the full
l
l
l
l
MIN
280
260
650
75
8
1.223
–0.5
1.22
TYP
300
300
–15
180
180
120
240
210
290
375
1.5
0.9
–5
80
–5
10
15
90
60
96
84
75
10
3
FB
MAX
320
340
500
50
12
to achieve a
UNITS
38621f
Deg
Deg
Deg
Deg
Deg
Deg
kHz
kHz
kHz
kHz
kHz
mV
kΩ
μA
μA
μA
μA
μA
ns
ns
ns
%
%
%
%
Ω
Ω
V
V
V