參數(shù)資料
型號(hào)： LTC3862HGN#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO24
封裝： 0.150 INCH, LEAD FREE, PLASTIC, SSOP-24
文件頁(yè)數(shù)： 34/40頁(yè)
文件大?。?/td> 613K
代理商： LTC3862HGN#TRPBF
LTC3862
4
3862fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
fSYNC
SYNC Minimum Input Frequency
VSYNC = External Clock
l
50
kHz
SYNC Maximum Input Frequency
VSYNC = External Clock
l
650
kHz
VSYNC
SYNC Input Threshold
Rising Threshold
1.5
V
IPLLFLTR
Phase Detector Sourcing Output Current
fSYNC > fOSC
–15
μA
Phase Detector Sinking Output Current
fSYNC < fOSC
15
μA
CH1-CH2
Channel 1 to Channel 2 Phase Relationship
VPHASEMODE = 0V
VPHASEMODE = Float
VPHASEMODE = 3V8
180
120
Deg
CH1-CLKOUT
Channel 1 to CLKOUT Phase Relationship
VPHASEMODE = 0V
VPHASEMODE = Float
VPHASEMODE = 3V8
90
60
240
Deg
DMAX
Maximum Duty Cycle
VDMAX = 0V
VDMAX = Float
VDMAX = 3V8
96
84
75
%
tON(MIN)1
Minimum On-Time
VBLANK = 0V (Note 8)
180
ns
tON(MIN)2
Minimum On-Time
VBLANK = Float (Note 8)
260
ns
tON(MIN)3
Minimum On-Time
VBLANK = 3V8 (Note 8)
340
ns
Gate Driver
RDS(ON)
Driver Pull-Up RDS(ON)
2.1
Ω
Driver Pull-Down RDS(ON)
0.7
Ω
Overvoltage
VFB(OV)
VFB, Overvoltage Lockout Threshold
VFB(OV) – VFB(NOM) in Percent
8
10
12
%
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
specied.
Note 3: The LTC3862E is guaranted to meet performance specications
from 0°C to 85°C. Specications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3862I is guaranteed
over the full –40°C to 125°C operating junction temperature range and
the LTC3862H is guaranteed over the full –40°C to 150°C operating
junction temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Continuous
operation above the specied 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 VFB to achieve a
specied error amplier output voltage.
Note 7: Guaranteed by design, not subject to test.
Note 8: The minimum on-time condition is specied for an inductor peak-
to-peak ripple current = 30% (see Minimum On-Time Considerations in the
Applications Information section).
ELECTRICAL CHARACTERISTICS (Notes 2, 3) The l denotes the specications which apply over the full
operating junction temperature range, otherwise specications are at TA = 25°C. VIN = 12V, RUN = 2V and SS = open, unless
otherwise noted.
相關(guān)PDF資料
PDF描述
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