參數(shù)資料
型號: LTC3731H
廠商: Linear Technology Corporation
英文描述: 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller
中文描述: 3相,600kHz的,同步降壓開關(guān)穩(wěn)壓器控制器
文件頁數(shù): 4/32頁
文件大小: 323K
代理商: LTC3731H
4
LTC3731H
3731hf
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= V
RUN/SS
= 5V unless otherwise noted.
The
denotes the specifications which apply over the full operating
SYMBOL
V
PLLTH
R
PLLIN
I
PLLFLTR
PARAMETER
PLLIN
Input Threshold
PLLIN
Input Resistance
Phase Detector Output Current
Sinking Capability
Sourcing Capability
Controller 2-Controller 1 Phase
Controller 3-Controller 1 Phase
Controller 1 TG to CLKOUT Phase
CONDITIONS
Minimum Pulse Width > 100ns
MIN
TYP
1
50
MAX
UNITS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC3731H is guaranteed to meet specifications from –40
°
C to
140
°
C. Junction temperature (T
J
) is calculated from the ambient
temperature T
A
and power dissipation P
D
according to the following
formula:
LTC3731H: T
J
= T
A
+ (P
D
×
95
°
C/W)
LTC3731H: T
J
= T
CASE
+ (P
D
×
32
°
C/W)
High junction temperatures degrade operating lifetimes. Operating lifetime
at junction temperatures greater than 125
°
C is derated to 1000 hours.
Note 3:
The IC is tested in a feedback loop that servoes the error amplifier
output voltage to its midrange point (V
ITH
= 1.2V).
Note 4:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5:
The minimum on-time condition corresponds to an inductor peak-
to-peak ripple current of
40% of I
MAX
(see minimum on-time
considerations in the Applications Information Section).
Note 6:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions.
Overtemperature protection becomes active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
V
k
f
PLLIN
< f
OSC
f
PLLIN
> f
OSC
20
20
120
240
30
60
μ
A
μ
A
Deg
Deg
Deg
Deg
R
RELPHS
CLKOUT
PHASMD = 0V
PHASMD = 5V
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