- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358824 > LM2608ATLX-1.8 (NATIONAL SEMICONDUCTOR CORP) 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode PDF資料下載
參數(shù)資料
| 型號： | LM2608ATLX-1.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode |
| 中文描述： | 0.69 A SWITCHING REGULATOR, 690 kHz SWITCHING FREQ-MAX, PBGA10 |
| 封裝： | MICRO, SMD-10 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 728K |
| 代理商： | LM2608ATLX-1.8 |
Application Information
(Continued)
TABLE 2. Suggested Inductors and Their Suppliers
(Continued)
Vendor
Panasonic
Panasonic
Pulse
Engineering
Pulse
Engineering
Sumida
Sumida
Sumida
Taiyo
Yuden
Taiyo
Yuden
SLF6025T-100M1R0
TDK
SLF6020T-100MR90
TDK
A918CY-100M
Toko
A915AY-100M
Toko
Model
Phone
FAX
ELL6GM100M
ELL6PM100M
P1174.103T
714-373-7366
714-373-7323
858-674-8100
858-674-8262
P0770.103T
858-674-8100
858-674-8262
CDRH5D18-100
CDRH4D28-100
CDC5D23-100
NP05D
B100M
NP04S
B100N
847-956-0666
847-956-0702
847-925-0888
847-925-0899
847-803-6100
847-803-6296
847-297-0070
847-699-7864
For low-cost applications, an unshielded bobbin inductor is
suggested. For noise critical applications, a toroidal or
shielded-bobbin inductor should be used. A good practice is
to lay out the board with overlapping footprints of both types
for design flexibility. This allows substitution of a low-noise
toroidal inductor, in the event that noise from low-cost bobbin
models is unacceptable.
The saturation current rating is the current level beyond
which an inductor loses its inductance. Beyond this rating,
the inductor loses its ability to limit current through the PFET
switch to a ramp and allows the switch current to increase
rapidly. This can cause poor efficiency, regulation errors or
stress to DC-DC converters like the LM2608. Saturation
occurs when the magnetic flux density from current through
the windings of the inductor exceeds what the inductor’s
core material can support with energy storage in a corre-
sponding magnetic field.
TABLE 3. Suggested Capacitors and Their Suppliers
Model
Size
Vendor
Phone
FAX
22μF, X7R or X5R Ceramic Capacitor for C2 (Output Filter Capacitor)
C3225X5RIA226M
1210
JMK325BJ226MM
1210
ECJ4YB0J226M
1210
GRM42-2X5R226K6.3
1210
10μF, 6.3V, X7R or X5R Ceramic Capacitor for C1 (Input Filter Capacitor)
C2012X5R0J106M
0805
JMK212BJ106MG
0805
ECJ3YB0J106K
1206
GRM40X5R106K6.3
0805
TDK
Taiyo-Yuden
Panasonic
muRata
847-803-6100
847-925-0888
714-373-7366
404-436-1300
847-803-6296
847-925-0899
714-373-7323
404-436-3030
TDK
Taiyo Yuden
Panasonic
muRata
847-803-6100
847-925-0888
714-373-7366
404-436-1400
847-803-6296
847-925-0899
714-373-7323
404-436-3030
CAPACITOR SELECTION
Use a 10μF, 6.3V, X7R or X5R ceramic input filter capacitor
and a 22μF, X7R or X5R ceramic output filter capacitor.
These provide an optimal balance between small size, cost,
reliability and performance. Do not use Y5V ceramic capaci-
tors.
Table 3
lists suggested capacitors and suppliers.
A 10μF ceramic capacitor can be used for the output filter
capacitor for smaller size in applications where the worst-
case transient load step is less than 200mA. Use of a 10μF
output capacitor trades off smaller size for an increase in
output voltage ripple, and undershoot during line and load
transient response.
The input filter capacitor supplies current to the PFET switch
of the LM2608 in the first part of each cycle and reduces
voltage ripple imposed on the input power source. The out-
put filter capacitor smoothes out current flow from the induc-
tor to the load, helps maintain a steady output voltage during
transient load changes and reduces output voltage ripple.
These capacitors must be selected with sufficient capaci-
tance and sufficiently low ESR to perform these functions.
The ESR, or equivalent series resistance, of the filter capaci-
tors is a major factor in voltage ripple.
L
www.national.com
16
相關PDF資料 |
PDF描述 |
|---|---|
| LM2612ABLX | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GTS; No. of Contacts:17; Connector Shell Size:20; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| LM2612BTL | 400mA Sub-miniature, Programmable, Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM2612BTLX | 400mA Sub-miniature, Programmable, Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM2612BBLX | 400mA Sub-miniature, Programmable, Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM2612BBP | 400mA Sub-miniature, Programmable, Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM260H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Comparator |
| LM260P | 制造商:DYMO 功能描述:Bulk |
| LM260Z | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:GREEN OVAL LAMP LED |
| LM261 | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:BLUE OVAL LAMP LED |
| LM2611 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.4MHz Cuk Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復。