參數(shù)資料
型號： LTC3615IUF-1#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PQCC24
封裝： 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24
文件頁數(shù)： 15/32頁
文件大小： 585K
代理商： LTC3615IUF-1#PBF
LTC3615/LTC3615-1
22
3615fa
Output Voltage Tracking Input
If SRLIM is low, once VTRACK/SS reaches or exceeds 0.6V
the run state is entered, and the MODE selection, power
good and current foldback circuits are enabled.
In the run state, the TRACK/SS pin can be used to track
down/up the output voltage of another supply. If the
VTRACK/SS again drops below 0.6V, the LTC3615 enters
the down-tracking state and the VOUT is referenced to
the TRACK/SS voltage. If VTRACK/SS reaches 0.1V value
the switching frequency is reduced by 4x to ensure that
the minimum duty cycle limit does not prevent the out-
put from following the TRACK/SS pin. The run state will
resume if the VTRACK/SS again exceeds 0.6V and the VOUT
is referenced to the internal reference.
Through the TRACK/SS pin, the output voltage can be set
up to either coincidental or ratiometric tracking, as shown
in Figures 8 and 9.
To implement the coincidental tracking waveform in
Figure 8, connect an extra resistive divider to the output
of the master channel and connect its midpoint to the
TRACK/SS pin for the slave channel. The ratio of this
divider should be selected the same as that of the slave
channel’s feedback divider (Figure 10).
In this tracking mode, the master channel’s output must
be set higher than slave channel’s output. To implement
the ratiometric start-up in Figure 9, no extra divider is
needed; simply connect the TRACK/SS pin to the other
channel’s VFB pin (Figure 12).
APPLICATIONS INFORMATION
Figure 8. Coincident Start-Up Tracking
Figure 9. Ratiometric Start-Up Tracking
Figure 10. Set for Coincidentally
Tracking (R3 = R5, R4 = R6)
Figure 11. Alternative Set-Up for Coincident
Start-Up Tracking (R1 = R3, R2 = R3 = R5)
Figure 12. Set-Up for
Ratiometric Tracking
TIME
VOUT1
VOUT2
OUTPUT
VOL
TAGE
3615 F08
TIME
3615 F09
VOUT1
VOUT2
OUTPUT
VOL
TAGE
R3
R4
R1
R2
VOUT1
FB1
LTC3615
TRACK/SS2
FB2
R5
R6
VOUT2
3615 F10
R2
R1
R3
VOUT1
FB1
LTC3615
TRACK/SS2
FB2
R4
R5
VOUT2
3615 F11
R1
R2
VOUT1
FB1
LTC3615
TRACK/SS2
FB2
R3
R4
VOUT2
3615 F12
相關(guān)PDF資料
PDF描述
LTC3615EUF#PBF SWITCHING REGULATOR, PQCC24
LTC3615EFE#PBF SWITCHING REGULATOR, PDSO24
LTC3615IFE-1#PBF SWITCHING REGULATOR, PDSO24
LTC3615EUF#TRPBF SWITCHING REGULATOR, PQCC24
LTC3615IFE#PBF SWITCHING REGULATOR, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3615IUFPBF 制造商:Linear Technology 功能描述:Dual 4MHz 3A Synch Step-Down DC/DC QFN24
LTC3615MPFE#PBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP
LTC3615MPFE#TRPBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP
LTC3615MPFE-1#PBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP
LTC3615MPFE-1#TRPBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP
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