參數(shù)資料
型號(hào)： SC2440
廠商： 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)： 21/26頁(yè)
文件大?。?/td> 643K
代理商： SC2440
21
2005 Semtech Corp.
www.semtech.com
SC2440
POWER MANAGEMENT
Applications Information
Board Layout Considerations
In a step-down switching regulator, the input bypass
capacitor, the main power switch and the freewheeling
diode carry switched currents with high dt
di (Figure 15).
For jitter-free operation, the size of the loop formed by
these components should be minimized. Since the power
switches are already integrated within the SC2440,
connecting the anodes of both freewheeling diodes close
to the negative terminal of the input bypass capacitor
minimizes size of the switched current loop. The input
bypass capacitors should also be placed close to the
Figure 14. Overall Loop Gain and Phase versus Frequency for (a) Channel 1 and (b) Channel 2 of the Dual
DC-DC Converter in Figure 1. (c) Channel 1 Load Transient Response, I
is switched between
0.3A and 1.7A. (d) Channel 2 Load Transient Response, I
OUT2
is switched between 0.45A and
1.7A.
Upper Trace : OUT1 Voltage, AC Coupled, 0.5V/div
Lower Trace : L
1
Inductor Current, 0.5A/div
Upper Trace : OUT2 Voltage, AC Coupled, 0.5V/div
Lower Trace : L
2
Inductor Current, 0.5A/div
(d)
(c)
40
μ
s/div
V
OUT
=5V
40
μ
s/div
V
OUT
=3.3V
(a)
V
IN
=12V, V
=3.3V at 1.7A,
C
5
=470pF, R
5
=15.4K
and C
6
=10pF
(b)
V
IN
=12V, V
=5V at 1.7A,
C
7
=220pF, R
8
=24.3K
and C
9
=10pF
相關(guān)PDF資料
PDF描述
SC2440EVB 2.5 MHz Dual Switching Regulator with Integrated 2A Switches
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC2440EVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:2.5 MHz Dual Switching Regulator with Integrated 2A Switches
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:- 類型:降壓（降壓） 輸出類型: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:296-25628-2
SC2441 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
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