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參數(shù)資料
| 型號： | SC1173 |
| 廠商： | Semtech Corporation |
| 英文描述： | Programmable Synchronous DC/DC Converter With LDO Controller(兼有可編程同步DC/DC控制器和可調輸出低壓差穩(wěn)壓器) |
| 中文描述： | 可編程同步DC / DC轉換器與穩(wěn)壓器控制器（兼有可編程同步直流/直流控制器和可調輸出低壓差穩(wěn)壓器） |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 227K |
| 代理商： | SC1173 |
8
2001 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
Layout Guidelines
SC1172 & SC1173
4) The Output Capacitor(s) (Cout) should be located as
close to the load as possible, fast transient load cur-
rents are supplied by Cout only, and connections between
Cout and the load must be short, wide copper areas to
minimize inductance and resistance.
5) The SC1172/3 is best placed over a quiet ground plane
area, avoid pulse currents in the Cin, Q1, Q2 loop flowing
in this area. PGNDH and PGNDL should be returned to
the ground plane close to the package. The AGND pin
should be connected to the ground side of (one of) the
output capacitor(s). If this is not possible, the AGND pin
may be connected to the ground path between the Output
Capacitor(s) and the Cin, Q1, Q2 loop. Under no circum-
stances should AGND be returned to a ground inside the
Cin, Q1, Q2 loop.
6) Vcc for the SC1172/3 should be supplied from the 5V
Currents in various parts of the power section
supply through a 10
resistor, the Vcc pin should be
decoupled directly to AGND by a 0.1
μ
F ceramic capacitor,
trace lengths should be as short as possible.
7) The Current Sense resistor and the divider across it
should form as small a loop as possible, the traces run-
ning back to CS+ and CS- on the SC1172/3 should run
parallel and close to each other. The 0.1
μ
F capacitor should
be mounted as close to the CS+ and CS- pins as possible.
8) Ideally, the grounds for the two LDO sections should be
returned to the ground side of (one of) the output
capacitor(s).
Vout
5V
+
+
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| SC1175 | Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
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| SC1175CSW.TR | Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175EVB-1 | Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SC1173CSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER WITH LOW DROPOUT REGULATOR CONTROLLER |
| SC1175 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175_04 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175CSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175CSW TR | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 2.75V 1A 20-Pin SOIC T/R |
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