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參數(shù)資料
| 型號： | SP6656 |
| 英文描述： | High Efficiency 400mA Synchronous Buck Regulator with Bit Programmable Output |
| 中文描述： | 高效率400mA同步降壓穩(wěn)壓器的可編程輸出位 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 185K |
| 代理商： | SP6656 |
14
Date: 7/9/04
SP6656 High Efficiency 400mA Synchronous Buck Regulator with Bit Programmable Output Copyright 2004 Sipex Corporation
APPLICATION INFORMATION
Output Voltage Ripple Frequency
An important consideration in a power supply
application is the frequency value of the output
ripple. Given the control technique of the SP6656
(as described in the operations section), the
frequency of the output ripple will vary when in
light to moderate load in the discontinuous or
PFM mode. For moderate to heavy loads greater
than about 100mA inductor current ripple, (for
the typical 10
μ
H inductor application on 100mA
is half the 200mA inductor current ripple), the
output ripple frequency will be fairly constant.
From the operations section, this maximum loop
frequency in continuous conduction mode is:
1
V
OUT
(
V
IN
- V
OUT
)
F
LP
≈
K
ON
Data for loop frequency, as measured from
output voltage ripple frequency, can be found in
the typical performance curves.
*
V
IN
*
Layout Considerations
Proper layout of the power and control circuits is
necessary in a switching power supply to obtain
good output regulation with stability and a mini-
mum of output noise. The SP6656 application
circuit can be made very small and reside close to
the IC for best performance and solution size, as
long as some layout techniques are taken into
consideration. To avoid excessive interference
between the SP6656 high frequency converter and
the other active components on the board, some
rules should be followed. Refer to the typical
application schematic on page 1 and the sample
PCB layout shown in the following figures to
illustrate how to layout a SP6656 power supply.
Avoid injecting noise into the sensitive part of
circuit via the ground plane. Input and output
capacitors conduct high frequency current through
the ground plane. Separate the control and power
grounds and connect them together at a single
point. Power ground plane is shown in the figure
titled PCB top sample layout and connects the
INDUCTORS SURFACE MOUNT
Inductor Specification
Inductance
(
μ
H)
10
Manufacturer/Part No.
Series R
I
SAT
(A)
Size
Inductor Type
Manufacturer
Website
LxW(mm)
Ht. (mm)
Murata LQH32CN100K11
0.300
0.45
3.2 x 1.6
1.8
Unshielded Ferrite Core
murata.com
10
TDK RLF5018T-100MR94
0.056
0.94
5.6 x 5.2
2.0
Shielded Ferrite Core
tdk.com
10
Coilcraft LPO6013-103K
0.300
0.70
6.0 x 5.4
1.3
Unshielded Ferrite Core coilcraft.com
22
Murata LQH32CN220K21
0.710
0.25
3.2 x 1.6
1.8
Unshielded Ferrite Core
murata.com
22
TDK RLF5018T- 220MR63
0.130
0.63
5.6 x 5.2
2.0
Shielded Ferrite Core
tdk.com
22
Coilcraft LPO6013-103
0.520
CAPACITORS - SURFACE MOUNT
Capacitor Specification
0.45
6.0 x 5.4
1.3
Unshielded Ferrite Core coilcraft.com
Capacitance
(
μ
F)
10
Manufacturer/Part No.
ESR
(max)
0.003
RippleCurrent
(A) @ 45
°
C
1.00
Size
Voltage
(V)
Capacitor Type
Manufacturer
Website
LxW(mm) Ht. (mm)
TDK C2012X5R0J106M
2.0 x 1.2
1.25
6.3
X5R Ceramic
tdk.com
10
Murata GRM21BR60J106KE01
0.003
1.00
2.0 x 1.2
1.25
6.3
POSCAP
murata.com
4.7
TDK C2012X5R0J475M
0.005
1.00
2.0 x 1.2
1.25
6.3
X5R Ceramic
tdk.com
4.7
Murata GRM21BR60J475KE01
0.005
1.00
2.0 x 1.2
1.25
6.3
POSCAP
murata.com
Table 2 Component Selection
Note: Components highlighted in bold are those used on the SP6656 Evaluation Board.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SP6656_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 400mA Synchronous Buck Regulator with Dynamically Adjustable Voltage Output |
| SP6656EB | 功能描述:電源管理IC開發(fā)工具 Hi-Efficiency 400mA Sync Buck Regulator 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 |
| SP6656ER | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 400mA Synchronous Buck Regulator with Bit Programmable Output |
| SP6656ER/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 400mA Synchronous Buck Regulator with Bit Programmable Output |
| SP6656ER3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 400mA Synchronous Buck Regulator with Dynamically Adjustable Voltage Output |
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