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| 型號： | sp6650 |
| 英文描述： | High Efficiency 600mA Synchronous Buck Regulator(高效率,600mA同步補償穩(wěn)壓器) |
| 中文描述： | 600mA的高效率同步降壓穩(wěn)壓器（高效率，600mA的同步補償穩(wěn)壓器） |
| 文件頁數(shù)： | 13/17頁 |
| 文件大小： | 170K |
| 代理商： | SP6650 |
13
Rev. 2/4/02
SP6650 High Efficiency 600mA Synchronous Buck Regulator
Copyright 2002 Sipex Corporation
The additional Rf/Cf network used in Figure 16
generates an artificial ramp from the LX pin
voltage and superimposes it to the feedback pin.
As a result, the internal loop comparator doesn’t
have to rely on output ripple to run PFM. Now
low ESR output capacitors, such as ceramic
capacitors, can be used, and the output ripple can
be reduced by two to three times. For the best
result, size the Cf and Rf values so the network
would introduce 10 to 30mV ripples to the FB
RB
100k
SP6650
U1
10
9
8
7
6
1
2
3
4
5
L1 22
μ
H
C
OUT
47
μ
F
R2
160k
R3
100k
Cf
33nF
PV
IN
V
IN
BLON
I
LIM
SHDN
LX
PGND
GND
V
OUT
FB
Rf
4.99k
3.3V/600mA
Vin 2.7-6.5 VDC
CV
IN
1.0
μ
F
RV
IN
10.0
C
IN
47
μ
F
ADDITIONAL APPLICATION CIRCUITS
Figure 16. Additional Application Circuit with Low Output Ripple
pin. Oversized ripple would compromise the
load regulation and also cause oscillation during
load transient. Load transient response and out-
put ripples from Figure 16 circuit are shown in
Figure 17 and Figure 18, respectively. The added
ripple voltage can be calculated from
V = K
ON
RfCf
Figure 17. V
OUT
transient response from 50mA to
500mA load step. CH1- V
OUT
, CH4 - I
LOAD
Figure 18. Output ripple CH1-output ripple. V
IN
= 5,
V
OUT
= 3.3V, I
LOAD
= 600mA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6650EB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6650EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6650EU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 600mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery |
| SP6650EU-L | 功能描述:DC/DC 開關(guān)控制器 High Eff 600mA Synchronous RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| SP6650EU-L/TR | 功能描述:DC/DC 開關(guān)控制器 High Eff 600mA Synchronous RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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