- 您现在的位置：买卖IC网 > PDF目录79981 > LTC3407AIDD#PBF (LINEAR TECHNOLOGY CORP) DUAL SWITCHING CONTROLLER, PDSO10 PDF资料下载
参数资料
| 型号： | LTC3407AIDD#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PDSO10 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 5/16页 |
| 文件大小： | 283K |
| 代理商： | LTC3407AIDD#PBF |
LTC3407A
13
3407afa
APPLICATIONS INFORMATION
The output voltage can now be programmed by choosing
the values of R1 and R2. To maintain high efciency, the
current in these resistors should be kept small. Choosing
2μA with the 0.6V feedback voltage makes R1~300k. A close
standard 1% resistor is 280k, and R2 is then 887k.
The POR pin is a common drain output and requires a pull-
up resistor. A 100k resistor is used for adequate speed.
Figure 3 shows the complete schematic for this design
example. The specic passive components chosen allow
for a 1mm height power supply that maintains a high ef-
ciency across load.
Board Layout Considerations
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3407A. These items are also illustrated graphically
in the layout diagram of Figure 2. Check the following in
your layout:
1. Does the capacitor CIN connect to the power VIN (Pin 3)
and GND (exposed pad) as closely as possible? This
capacitor provides the AC current to the internal power
MOSFETs and their drivers.
2. Are COUT and L1 closely connected? The (–) plate of
COUT returns current to GND and the (–) plate of CIN.
3. The resistor divider formed by R1 and R2 must be
connected between the (+) plate of COUT and a ground
sense line terminated near GND (exposed pad). The
feedback signals VFB1 and VFB2 should be routed away
from noisy components and traces, such as the SW lines
(Pins 4 and 7), and their traces should be minimized.
4. Keep sensitive components away from the SW pins. The
input capacitor CIN and the resistors R1 to R4 should be
routed away from the SW traces and the inductors.
5. A ground plane is preferred, but if not available keep
the signal and power grounds segregated with small
signal components returning to the GND pin at one
point. Addtionally the two grounds should not share
the high current paths of CIN or COUT.
6. Flood all unused areas on all layers with copper. Flooding
with copper will reduce the temperature rise of power
components. These copper areas should be connected
to VIN or GND.
Figure 2. LTC3407A Layout Diagram (See Board Layout Checklist)
RUN/SS2
VIN
VOUT2
VOUT1
RUN/SS1
POR
SW1
VFB1
GND
VFB2
SW2
MODE/SYNC
LTC3407A
CIN
C4
C5
L1
L2
R4
R2
R1
R3
COUT2
COUT1
3407A F02
BOLD LINES INDICATE HIGH CURRENT PATHS
相关PDF资料 |
PDF描述 |
|---|---|
| LS5320-7ERD9TB1 | 2-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LM3700XCBP-290/NOPB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9 |
| LM385BLPRE3-1-2 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.235 V, PBCY3 |
| LM385LPRE3-1-2 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.235 V, PBCY3 |
| LX1570CM | 1 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3407AIDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
| LTC3407AIMSE#PBF | 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3407AIMSE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3407AIMSE-2 | 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step Down 2.5V to 5.5V 10-Pin MSOP EP |
| LTC3407AIMSE-2#PBF | 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
发布紧急采购，3分钟左右您将得到回复。