參數(shù)資料
型號(hào): LT3686IDD#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝: 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10
文件頁(yè)數(shù): 17/28頁(yè)
文件大小: 509K
代理商: LT3686IDD#TRPBF
LT3686
24
3686fc
SW
DA
FB
MODE
SS
RT
VIN
30V TO 36V
2.2F
100nF
61.9k
10k
301k
100H
0.22F
10F
15V
BD
VOUT
500mA
GND
LT3686
3686 F18
EN/UVLO
BOOST
Figure 18. 25V Step-Down Converter
junction temperature. The die temperature is calculated by
multiplying the LT3686 power dissipation by the thermal
resistance from junction to ambient. Power dissipation
within the LT3686 can be estimated by calculating the total
power loss from an efficiency measurement and subtract-
ing the catch diode loss. The resulting temperature rise at
full load is nearly independent of input voltage. Thermal
resistance depends on the layout of the circuit board, but
43°C/W is typical for the (3mm
× 3mm) DFN package.
Outputs Greater Than 19V
Note that for outputs above 19V, the input voltage range
will be limited by the maximum rating of the BOOST pin.
The sum of input and output voltages cannot exceed the
BOOST pin’s 55V rating. The 25V circuit (Figure 18) shows
how to overcome this limitation using an additional Zener
diode.
Other Linear Technology Publications
Application Notes 19, 35 and 44 contain more detailed
descriptions and design information for Buck regulators
and other switching regulators. The LT1376 data sheet
has a more extensive discussion of output ripple, loop
compensation and stability testing. Design Note 100
shows how to generate a bipolar output supply using a
buck regulator.
ApplicAtions inForMAtion
相關(guān)PDF資料
PDF描述
LT3688IFE#TRPBF SWITCHING REGULATOR, PDSO24
LT3688EUF#PBF SWITCHING REGULATOR, PQCC24
LT3688IFE#PBF SWITCHING REGULATOR, PDSO24
LT3688HFE#PBF SWITCHING REGULATOR, PDSO24
LT3688HFE#TRPBF SWITCHING REGULATOR, PDSO24
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