參數(shù)資料
型號: LTC3616IUDD#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 13.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC24
封裝: 3 X 5 MM, LEAD FREE, PLASTIC, QFN-24
文件頁數(shù): 14/28頁
文件大小: 490K
代理商: LTC3616IUDD#TRPBF
LTC3616
21
3616fa
to the actual TRACK/SS pin voltage if the voltage value
is between 0.3V and 0.6V. Note: if TRACK/SS voltage is
0.6V, either the tracking circuit or the internal reference
can be used.
During up/down tracking the output current foldback is
disabled and the PGOOD pin is always pulled down (see
Figure 9).
applicaTions inForMaTion
Figure 8. DDR Pin Not Tied to SVIN
Figure 9. DDR Pin Tied to SVIN. Example DDR Application
SOFT-START
STATE
tSS > 1ms
SHUTDOWN
STATE
0.6V
0.2V
0V
VIN
VFB PIN
VOLTAGE
TRACK/SS
PIN VOLTAGE
RUN PIN
VOLTAGE
SVIN PIN
VOLTAGE
RUN STATE
TIME
3616 F08
REDUCED
SWITCHING
FREQUENCY
DOWN
TRACKING
STATE
UP
TRACKING
STATE
SOFT-START
STATE
tSS > 1ms
SHUTDOWN
STATE
0.3V
0.45V
0.3V
0.2V
0V
VIN
VFB PIN
VOLTAGE
EXTERNAL
VOLTAGE
REFERENCE 0.45V
TRACK/SS
PIN VOLTAGE
RUN PIN
VOLTAGE
SVIN PIN
VOLTAGE
RUN STATE
TIME
3616 F09
REDUCED
SWITCHING
FREQUENCY
DOWN
TRACKING
STATE
UP
TRACKING
STATE
Efficiency Considerations
Theefficiencyofaswitchingregulatorisequaltotheoutput
power divided by the input power times 100%. It is often
useful to analyze individual losses to determine what is
limiting the efficiency and which change would produce
the most improvement. Efficiency can be expressed as:
Efficiency = 100% – (L1 + L2 + L3 + ...)
where L1, L2, etc. are the individual losses as a percent-
age of input power.
相關(guān)PDF資料
PDF描述
LTC3617EUDD#PBF 14 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC24
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