參數(shù)資料
型號(hào)： SC2440EVB
廠(chǎng)商： Semtech Corporation
英文描述： 2.5 MHz Dual Switching Regulator with Integrated 2A Switches
中文描述： 2.5 MHz雙開(kāi)關(guān)穩(wěn)壓器集成甲開(kāi)關(guān)
文件頁(yè)數(shù)： 22/26頁(yè)
文件大?。?/td> 643K
代理商： SC2440EVB
22
2005 Semtech Corp.
www.semtech.com
SC2440
POWER MANAGEMENT
Applications Information
input pins. Shortening the traces of the SW and BOOST
nodes reduces the parasitic trace inductance at these
nodes. This not only reduces EMI but also decreases
switching voltage spikes at these nodes.
Figures 16(a) and 16(b) shows how various external
components are placed around the SC2440. The
frequency-setting resistor is placed next to the ROSC pin
on the backside. The resistor is grounded to the ground
plane, which is then tied to anodes of the freewheeling
diodes with vias. These precautions reduce switching
noise pickup at the ROSC pin.
To ensure proper adhesion to the ground plane, avoid
using vias directly under the device. In figure 15 two
12mil vias are placed at the edge of the underside pad.
IN
V
OUT
V
L
Z
Fast Switching Current Paths in a Buck
Regulator. Minimize the size of this loop
to reduce parasitic trace inductance.
Figure 15.
Suggested PCB Layout for the SC2440. Notice that there is no via directly under
the device and that the only component on the backside is the frequency-setting
resistor. All vias are 12mil in diameter.
Figure 16.
(a)
R9
GND
(b)
GND
VIN
C2
L2
D3
L1
C4
D4
D1
D2
C15
C1
C3
R3
R4
C9
C8
R7
R8
C7
R6
C6
C5
R5
R2
R1
VOUT2
VOUT1
GND
U1
C10
GND
V
V
相關(guān)PDF資料
PDF描述
SC2440TETRT 2.5 MHz Dual Switching Regulator with Integrated 2A Switches
SC2441A 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441AEVB 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441ATETRT 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441 Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC2440STDEVB 制造商:Semtech Corporation 功能描述:Evaluation Board For 2.5 MHz Dual Switching Regulator With Integrated 2A Switches
SC2440TE.TRTCUT 制造商:Semtech Corporation 功能描述:
SC2440TETRT 功能描述:IC REG BUCK 2A DL 16TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱(chēng):296-25628-2
SC2441 制造商:SEMTECH 制造商全稱(chēng):Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441A 制造商:SEMTECH 制造商全稱(chēng):Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
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