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參數資料
| 型號： | ADP3171 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Charger front end protection IC with 30V max Vin and 4.5V LDO output 8-WSON 0 to 125 |
| 中文描述： | 同步降壓控制器，配有雙線性穩壓器控制器 |
| 文件頁數： | 11/12頁 |
| 文件大小： | 310K |
| 代理商： | ADP3171 |
REV. 0
ADP3171
–11–
improved current rating through the vias (if it is a current
path), and improved thermal performance—especially if the
vias extended to the opposite side of the PCB where a plane
can more readily transfer the heat to the air.
The output power path, though not as critical as the switching
power path, should also be routed to encompass a small area.
The output power path is formed by the current path through
the inductor, the current sensing resistor, the output
capacitors, and back to the input capacitors.
For best EMI containment, the ground plane should extend
fully under all the power components. These are the input
capacitors, the power MOSFETs and Schottky diode,
the inductor, the current sense resistor, any snubbing
elements that might be added to dampen ringing, and the
output capacitors.
10.
11.
Signal Circuitry
12.
The output voltage is sensed and regulated between the GND
pin
(which connects to the signal ground plane) and the
FB–
pin. The output current is sensed (as a voltage) and
regulated
between the CS– pin and the CS+ pin. In order
to avoid
differential mode noise pickup in those sensed
signals, their
loop areas should be small. Thus the FB–
trace should be
routed atop the signal ground plane, and the
CS+ and CS–
traces should be routed as a closely coupled
pair (CS+ should
be over the signal ground plane as well).
13.
The CS+ and CS– traces should be Kelvin connected to the
current sense resistor so that the additional voltage drop due
to current flow on the PCB at the current sense resistor
connections does not affect the sensed voltage. It is desirable
to have the ADP3171 close to the output capacitor bank and
not in the output power path, so that any voltage drop
between the output capacitors and the GND pin is minimized,
and voltage regulation is not compromised.
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相關代理商/技術參數 |
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| ADP3171JR | 制造商:Rochester Electronics LLC 功能描述:1.2V VTT BUCK CNTRLR W/2 LDOS & PWR GOOD - Bulk |
| ADP3171JR-REEL7 | 制造商:Rochester Electronics LLC 功能描述:1.2V VTT BUCK CNTRLR W/2 LDOS & PWR GOOD - Tape and Reel |
| ADP3178 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Bit Programmable Synchronous Buck Controllers |
| ADP3178JR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADP3178JRZ-REEL7 | 功能描述:IC REG BUCK 4BIT ADJ VLT 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數:2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
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