- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67754 > L6706 (STMICROELECTRONICS) SWITCHING REGULATOR, QCC40 PDF資料下載
參數(shù)資料
| 型號： | L6706 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, QCC40 |
| 封裝： | 6 X 6 MM, ROHS COMPLIANT, VFQFPN-40 |
| 文件頁數(shù)： | 39/47頁 |
| 文件大小： | 623K |
| 代理商： | L6706 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁當(dāng)前第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁
Layout guidelines
L6706
44/47
Doc ID 15698 Rev 2
points far from the load will cause a non-optimum load regulation, increasing output
tolerance. Locate current reading components close to the device. The PCB traces
connecting the reading point must use dedicated nets, routed as parallel traces in order to
avoid the pick-up of any common mode noise. It's also important to avoid any offset in the
measurement and, to get a better precision, to connect the traces as close as possible to
the sensing elements. Small filtering capacitor can be added, near the controller, between
VOUT and SGND, on the CS- line to allow higher layout flexibility. Power connections and
related connections layout.
Figure 26.
Power connections and related connections layout
Note:
Boot capacitor extra charge. systems that do not use schottky diodes might show big
negative spikes on the phase pin. This spike can be limited as well as the positive spike but
has an additional consequence: it causes the bootstrap capacitor to be over-charged. This
extra-charge can cause, in the worst case condition of maximum input voltage and during
particular transients, that boot-to-phase voltage overcomes the abs. max. ratings also
causing device failures. It is then suggested in this cases to limit this extra-charge by adding
a small resistor in series to the boot diode (see Figure 26) and by using standard and low-
capacitive diodes.
20.3
Embedding L6706 - Based VR
When embedding the VRD into the application, additional care must be taken since the
whole VRD is a switching DC/DC regulator and the most common system in which it has to
work is a digital system such as MB or similar. In fact, latest MB has become faster and
powerful: high speed data bus are more and more common and switching-induced noise
produced by the VRD can affect data integrity if not following additional layout guidelines.
Few easy points must be considered mainly when routing traces in which high switching
currents flow (high switching currents cause voltage spikes across the stray inductance of
the trace causing noise that can affect the near traces):
Keep safe guarding distance between high current switching VRD traces and data buses,
especially if high-speed data bus to minimize noise coupling. Keep safe guard distance or
filter properly when routing bias traces for I/O sub-systems that must walk near the VRD.
Possible causes of noise can be located in the PHASE connection, MOSFET gate drive and
Input voltage path (from input bulk capacitors and HS drain). Also PGND connection must
be considered if not insisting on a power ground plane. These connections must be carefully
kept far away from noise-sensitive data bus. Since the generated noise is mainly due to the
switching activity of the VRM, noise emissions depend on how fast the current switches. To
reduce noise emission levels, it is also possible, in addition to the previous guidelines, to
reduce the current slope by properly tuning the HS gate resistor and the PHASE snubber
network.
L
CIN
VIN
UGATE
PHASE
LGATE
PGND
LOAD
BOOT
PHASE
VCC
SGND
+Vcc
C
BOOT
L
CIN
VIN
LOAD
To limit C
BOOT
Extra-Charge
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6717 | DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 |
| L6728HTR | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728H | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728 | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
| L6728TR | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6706TR | 功能描述:DC/DC 開關(guān)控制器 VR11.1 SINGLE PHASE CNTRL W/INT DRI 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 |
| L6709 | 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6709TR | 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6710 | 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6710TR | 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。