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參數(shù)資料
| 型號： | LM2716MT-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Dual (Step-up and Step-down) PWM DC/DC Converter |
| 中文描述： | DUAL SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | TSSOP-24 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 563K |
| 代理商： | LM2716MT-ADJ |
Boost Operation
(Continued)
mc
)
0.072F
SW
(in V/s)
where R
is the minimum load resistance, V
is the maxi-
mum input voltage, g
is the error amplifier transconduc-
tance found in the
Electrical Characteristics
table, and R
D-
SON
is the value chosen from the graph "R
vs. V
IN
" in
the
Typical Performance Characteristics
section.
LAYOUT CONSIDERATIONS
The LM2716 uses two separate ground connections, PGND
for the drivers and boost NMOS power device and AGND for
the sensitive analog control circuitry. The AGND and PGND
pins should be tied directly together at the package. The
feedback and compensation networks should be connected
Application Information
directly to a dedicated analog ground plane and this ground
plane must connect to the AGND pin. If no analog ground
plane is available then the ground connections of the feed-
back and compensation networks must tie directly to the
AGND pin. Connecting these networks to the PGND can
inject noise into the system and effect performance.
The input bypass capacitor C
IN
, as shown in
Figure 3
, must
be placed close to the IC. This will reduce copper trace
resistance which effects input voltage ripple of the IC. For
additional input voltage filtering, a 100nF bypass capacitor
can be placed in parallel with C
IN
, close to the V
IN
pin, to
shunt any high frequency noise to ground. The output ca-
pacitors, C
OUT1
and C
OUT2
, should also be placed close to
the IC. Any copper trace connections for the C
OUTX
capaci-
tors can increase the series resistance, which directly effects
output voltage ripple. The feedback network, resistors R
and R
, should be kept close to the FB pin, and away from
the inductor, to minimize copper trace connections that can
inject noise into the system. Trace connections made to the
inductors and schottky diodes should be minimized to re-
duce power dissipation and increase overall efficiency. See
Figure 3
,
Figure 4
, and
Figure 5
for a good example of
proper layout. For more detail on switching power supply
layout considerations see Application Note AN-1149:
Layout
Guidelines for Switching Power Supplies
.
Some recommended Inductors (others may be used)
Manufacturer
Coilcraft
Coiltronics
Pulse
Sumida
Inductor
Contact Information
www.coilcraft.com
www.cooperet.com
www.pulseeng.com
www.sumida.com
DO3316 and DO5022 series
DRQ73 and CD1 series
P0751 and P0762 series
CDRH8D28 and CDRH8D43 series
Some recommended Input and Output Capacitors (others may be used)
Manufacturer
Vishay Sprague
Taiyo Yuden
Capacitor
Contact Information
www.vishay.com
www.t-yuden.com
293D, 592D, and 595D series tantalum
High capacitance MLCC ceramic
ESRD seriec Polymer Aluminum Electrolytic
SPV and AFK series V-chip series
High capacitance MLCC ceramic
EEJ-L series tantalum
Cornell Dubilier
www.cde.com
Panasonic
www.panasonic.com
L
www.national.com
14
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| LM2716MTEV | 功能描述:電源管理IC開發(fā)工具 LM2716MT EVAL BOARD 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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| LM2716MTX/NOPB | 功能描述:DC/DC 開關(guān)控制器 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(fēng)格: 封裝 / 箱體:CPAK |
| LM2716MTX-ADJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual (Step-up and Step-down) PWM DC/DC Converter |
| LM2717 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Step-down DC/DC Converter |
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