參數(shù)資料
型號: LTC3714EG
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp
中文描述: 2 A SWITCHING CONTROLLER, PDSO28
封裝: 5.30 MM, PLASTIC, SSOP-28
文件頁數(shù): 17/28頁
文件大?。?/td> 345K
代理商: LTC3714EG
LTC3714
17
3714f
APPLICATIOU
INTV
CC
Regulator
An internal P-channel low dropout regulator produces the
5V supply that powers the drivers and internal circuitry
within the LTC3714. The INTV
CC
pin can supply up to
50mA RMS and must be bypassed to ground with a
minimum of 4.7
μ
F tantalum or other low ESR capacitor.
Good bypassing is necessary to supply the high transient
currents required by the MOSFET gate drivers. Applica-
tions using large MOSFETs with a high input voltage and
high frequency of operation may cause the LTC3714 to
exceed its maximum junction temperature rating or RMS
current rating. Most of the supply current drives the
MOSFET gates unless an external EXTV
CC
source is used.
In continuous mode operation, this current is I
GATECHG
=
f(Q
g(TOP)
+ Q
g(BOT)
). The junction temperature can be
estimated from the equations given in Note 2 of the
Electrical Characteristics. For example, the LTC3714EG is
limited to less than 14mA from a 30V supply:
T
J
= 70
°
C + (14mA)(30V)(130
°
C/W) = 125
°
C
For larger currents, consider using an external supply with
the EXTV
CC
pin.
W
U
U
Table 1. VID Output Voltage Programming
VID4
VID3
VID2
VID1
VID0
V
OUT
(V)
1.75V
0
0
0
0
0
0
0
0
0
1
1.70V
0
0
0
1
0
1.65V
0
0
0
1
1
1.60V
0
0
1
0
0
1.55V
0
0
1
0
1
1.50V
0
0
1
1
0
1.45V
0
0
1
1
1
1.40V
0
1
0
0
0
1.35V
0
1
0
0
1
1.30V
0
1
0
1
0
1.25V
0
1
0
1
1
1.20V
0
1
1
0
0
1.15V
0
1
1
0
1
1.10V
0
1
1
1
0
1.05V
0
1
1
1
1
1.00V
1
0
0
0
0
0.975V
1
0
0
0
1
0.950V
1
0
0
1
0
0.925V
1
0
0
1
1
0.900V
1
0
1
0
0
0.875V
1
0
1
0
1
0.850V
1
0
1
1
0
0.825V
1
0
1
1
1
0.800V
1
1
0
0
0
0.775V
1
1
0
0
1
0.750V
1
1
0
1
0
0.725V
1
1
0
1
1
0.700V
1
1
1
0
0
0.675V
1
1
1
0
1
0.650V
1
1
1
1
0
0.625V
1
1
1
1
1
0.600V
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