- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44991 > LTC3527EUD#TR (LINEAR TECHNOLOGY CORP) 0.8 A DUAL SWITCHING CONTROLLER, 2800 kHz SWITCHING FREQ-MAX, PQCC16 PDF資料下載
參數(shù)資料
| 型號： | LTC3527EUD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.8 A DUAL SWITCHING CONTROLLER, 2800 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 359K |
| 代理商： | LTC3527EUD#TR |
LTC3527/LTC3527-1
13
35271fc
35271 F01
VIN1
VIN
VIN2
VOUT1
GND
MODE SHDN1
SHDN2 FSEL
VOUT2
APPLICATIONS INFORMATION
Figure 1. Recommended Component Placement for a Dual-Layer Board
PCB Layout Guidelines
The high speed operation of the LTC3527/LTC3527-1
demands careful attention to board layout. A careless
layout will result in reduced performance. Figure 1 shows
the recommended component placement. A large ground
pin copper area will help to lower the die temperature. A
multilayer board with a separate ground plane is ideal, but
not absolutely necessary.
COMPONENT SELECTION
Inductor Selection
The LTC3527/LTC3527-1 can utilize small surface mount
inductors due to their fast 1.2MHz/2.2MHz switching
frequencies. Inductor values between 3.3μH and 4.7μH
are suitable for most 1.2MHz applications. Inductor values
between 1.5μH and 2.2μH are suitable for most 2.2MHz
applications. Larger values of inductance will allow slightly
greater output current capability (and lower the Burst
Mode threshold) by reducing the inductor ripple cur-
rent. Increasing the inductance above 10μH will increase
size while providing little improvement in output current
capability.
The minimum inductance value is given by:
L
VV
V
f Ripple V
IN MIN
OUT MAX
IN MIN
OU
>
()
(
)
()
(
–
)
T
TMAX
()
where:
Ripple = Allowable inductor current ripple (amps
peak-to-peak)
VIN(MIN) = Minimum input voltage
VOUT(MAX) = Maximum output voltage
f = Oscillator frequency (MHz)
The inductor current ripple is typically set for 20% to
40% of the maximum inductor current. High frequency
ferrite core inductor materials reduce frequency dependent
power losses compared to cheaper powdered iron types,
improving efciency. The inductor should have low ESR
(series resistance of the windings) to reduce the I2R power
losses, and must be able to support the peak inductor
current without saturating. Molded chokes and some
chip inductors usually do not have enough core area to
support the peak inductor currents of 900mA (500mA)
seen on the LTC3527/LTC3527-1. To minimize radiated
noise, use shielded inductors. See Table 1 for suggested
components and suppliers.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3527EUD-1#TR | 0.8 A DUAL SWITCHING CONTROLLER, 2800 kHz SWITCHING FREQ-MAX, PQCC16 |
| LTC3528EDDB-2#TRPBF | SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3528EDDB-2#TRMPBF | SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3529EDCB#PBF | SWITCHING CONTROLLER, PDSO8 |
| LTC3533EDE#TR | 7 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3527EUD-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3528 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
| LTC3528-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN |
| LTC3528B | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
| LTC3528B-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。