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参数资料
| 型号： | LT3695IMSE-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 21/30页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 1A 16MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 250kHz ~ 2.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
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LT3695 Series
APPLICATIONS INFORMATION
then the LT3695 regulators’ internal circuitry will pull its
quiescent current through its SW pin. This is ?ne if your
system can tolerate a few mA in this state. If you ground
the RUN/SS pin, the SW pin current will drop to essen-
tially zero. However, if the V IN pin is grounded while the
output is held high, then parasitic diodes inside the LT3695
regulators can pull large currents from the output through
the SW pin and the V IN pin. Figure 8 shows a circuit that
will run only when the input voltage is present and that
protects against a shorted or reversed input.
PCB Layout
For proper operation and minimum EMI, care must be
taken during printed circuit board layout. Figures 9 and
10 show the recommended component placement with
trace, ground plane and via locations. Note that large,
switched currents ?ow in the LT3695 regulators’ V IN , SW
and PGND pins, the catch diode and the input capacitor
(C IN ). The loop formed by these components should be
as small as possible. These components, along with the
inductor and output capacitor (C OUT ), should be placed on
the same side of the circuit board, and their connections
V IN
D4
MBRS140
V IN
BD
BOOST
should be made on that layer. All connections to GND should
be made at a common star ground point or directly to a
LT3695
local, unbroken ground plane below these components.
RUN/SS
V C
GND PGND
SW
DA
FB
V OUT
BACKUP
The SW and BOOST nodes should be laid out carefully to
avoid interference. Finally, keep the FB, R T and V C nodes
small so that the ground traces will shield them from the
SW and BOOST nodes. To keep thermal resistance low,
extend the ground plane as much as possible and add
3695 F09
Figure 8. Diode D4 Prevents a Shorted Input from Discharging
a Backup Battery Tied to the Output. It Also Protects the Circuit
from a Reversed Input. The Regulator Runs Only When the Input
Is Present
thermal vias under and near the LT3695 regulators to any
additional ground planes within the circuit board and on the
bottom side. Keep in mind that the thermal design must
keep the junctions of the IC below the speci?ed absolute
maximum temperature.
GND
C2
D1
V OUT
L
C3
GND
C2
D1
V OUT
L
C3
R2
R T
V IN
C1
GND
R C
R1
C C
R T
V IN
C1
GND
R C
C C
Figure 9. A Good PCB Layout Ensures Proper,
Low EMI Operation (LT3695)
3695 F09
Figure 10. A Good PCB Layout Ensures Proper,
Low EMI Operation (LT3695-3.3, LT3695-5)
3695 F10
3695fa
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3695IMSEPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Fault Tolerant Micropower Step-Down Regulator |
| LT3695IMSETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Fault Tolerant Micropower Step-Down Regulator |
| LT370 | 功能描述:标准LED-通孔 Green RoHS:否 制造商:Vishay Semiconductors 照明颜色:Red 光强度:0.7 mcd 波长/色温:615 nm 显示角:45 deg 透镜颜色/类型:Clear, Non-Diffused 正向电流:70 mA 正向电压:1.83 V to 3.03 V LED 大小:2 mm 系列: 封装:Tube |
| LT370_1 | 制造商:SEOUL 制造商全称:Seoul Semiconductor 功能描述:GREEN LAMP LED |
| LT370Z | 制造商:SEOUL 制造商全称:Seoul Semiconductor 功能描述:GREEN OVAL LAMP LED |
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