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參數(shù)資料
| 型號： | SP6681 |
| 英文描述： | High Efficiency Boost Charge Pump Regulator |
| 中文描述： | 高效率升壓充電泵穩(wěn)壓器 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 125K |
| 代理商： | SP6681 |
8
Rev:A Date: 11/20/03
SP6681 High Efficiency Boost Charge Pump Regulator Copyright 2002 Sipex Corporation
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The SP6681 circuit shown in figure 5 acts as a
3.3V in to 5V out for biasing the two 5V Logic
Level N-channel MOSFETs used in a step-
down DC/DC converter. The high current
switching path is from the +3.3V bus through
the N-channel MOSFETs and inductor L1 to the
output capacitors. To fully enhance Logic-
Level N-channel MOSFETs, +5V is needed
from the SP6681 output to the SP6120 VCC pin,
which supplies the low-side MOSFET MN1
with a 0V to 5V gate pulse through the GL pin.
Table 2. Suggested Low ESR Cermic Surface Mount Capacitors.
For the top-side MOSFET MN2 (which has a
floating gate driver biased at the BST pin), the
boost pin BST is charge pumped up from the 0
to 3.3V switching at the switch node pin SWN,
with an additional 5V from SP6681 output,
through the DBST diode to a total of 8.3V when
the SWN is at 3.3V, or a total of 5V from gate to
source to fully enhance the MOSFET MN2. For
a more detailed schematic of a step-down DC/
DC converter, see the SP6120 datasheet.
Figure 5. SP6681 Circuit as a 3.3V to 5.0V Boost for 5V N-Channel MOSFETs in Buck DC/DC Converter Circuit.
SP6120
VCC
VFB
PGND
BST
GH
SWN
GL
MN2
C
IN
1.9V
1A to 7A
VOUT
RF
C
OUT
RI
MN1
DBST
3.3V
V
IN
L1
2.2
μ
F
2.2
μ
F
2.2
μ
F
SP6681
V
OUT
CF1P
V
IN
CD4
Cx8
CF2P
CF1N
GND
CF2N
CLK
10
9
8
7
6
1
2
3
4
5
4.7
μ
F
130kHz Internal Clock
+5V
OUT
CBST
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6681EU | High Efficiency Boost Charge Pump Regulator |
| SP6682 | High Efficiency Charge Pump Regulator for White LEDs |
| SP6682ER | High Efficiency Charge Pump Regulator for White LEDs |
| SP6682EU | High Efficiency Charge Pump Regulator for White LEDs |
| SP6682UEB | Evaluation Board Manual |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6681EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Boost Charge Pump Regulator |
| SP6681EU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Boost Charge Pump Regulator |
| SP6682 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Charge Pump Regulator for White LEDs |
| SP6682_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency Charge Pump Regulator for White LEDs |
| SP6682EB | 功能描述:電源管理IC開發(fā)工具 Eval Board for SP6682 Series RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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