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参数资料
| 型号： | LT3695EMSE-3.3#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 14/30页 |
| 文件大小： | 491K |
| 代理商： | LT3695EMSE-3.3#TRPBF |
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LT3695 Series
21
3695fa
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 VIN 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 VIN 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.
APPLICATIONS INFORMATION
3695 F09
LT3695
VIN
VC
BACKUP
D4
MBRS140
VOUT
VIN
BD
GND
SW
DA
FB
RUN/SS
BOOST
PGND
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
VOUT
GND
C2
D1
RT
RC
C1
C3
L
VIN
GND
3695 F09
R1
R2
CC
Figure 9. A Good PCB Layout Ensures Proper,
Low EMI Operation (LT3695)
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’ VIN, SW
and PGND pins, the catch diode and the input capacitor
(CIN). The loop formed by these components should be
as small as possible. These components, along with the
inductor and output capacitor (COUT), should be placed on
the same side of the circuit board, and their connections
should be made on that layer. All connections to GND should
be made at a common star ground point or directly to a
local, unbroken ground plane below these components.
The SW and BOOST nodes should be laid out carefully to
avoid interference. Finally, keep the FB, RT and VC 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
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 specied absolute
maximum temperature.
Figure 10. A Good PCB Layout Ensures Proper,
Low EMI Operation (LT3695-3.3, LT3695-5)
VOUT
GND
C2
D1
RT
RC
C1
C3
L
VIN
GND
3695 F10
CC
相关PDF资料 |
PDF描述 |
|---|---|
| LT3751IUFD#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20 |
| LT3751IUFD#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20 |
| LT3751EFE | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| LT3751EUFD#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20 |
| LT3751EUFD | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3695EMSE-5#PBF | 功能描述:IC REG BUCK 5V 1A 16MSOP 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3695EMSE-5#PBF | 制造商:Linear Technology 功能描述:IC STEP-DOWN REGULATOR MSOP-16 |
| LT3695EMSE-5#TRPBF | 功能描述:IC REG BUCK 5V 1A 16MSOP 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 |
| LT3695EMSEPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Fault Tolerant Micropower Step-Down Regulator |
| LT3695EMSETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Fault Tolerant Micropower Step-Down Regulator |
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