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參數(shù)資料
| 型號： | LM2716 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual (Step-up and Step-down) PWM DC/DC Converter |
| 中文描述： | 雙（升壓和降壓）PWM直流/直流轉換器 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 563K |
| 代理商： | LM2716 |
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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PDF描述 |
|---|---|
| LM2717 | Dual Step-down DC/DC Converter |
| LM2717MT | Dual Step-down DC/DC Converter |
| LM2717MTX | Dual Step-down DC/DC Converter |
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| LM2731XMFX | 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2716MT | 制造商:Texas Instruments 功能描述:LCD BUCK, BOOSTER, 2716, TSSOP24 |
| LM2716MT/NOPB | 功能描述:IC REG BUCK BST FIX/ADJ 24-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM2716MT-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 |
| 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 |
| LM2716MTX | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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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