參數(shù)資料
型號(hào)： LT3695EMSE-5#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16
封裝： LEAD FREE, PLASTIC, MSOP-16
文件頁(yè)數(shù)： 14/30頁(yè)
文件大?。?/td> 491K
代理商： LT3695EMSE-5#TRPBF
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
相關(guān)PDF資料
PDF描述
LT3695IMSE-5#TRPBF 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16
LT3695EMSE-3.3#PBF 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16
LT3695EMSE-3.3#TRPBF 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16
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參數(shù)描述
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LT3695EMSETRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A Fault Tolerant Micropower Step-Down Regulator
LT3695HMSE#PBF 功能描述:IC REG BUCK ADJ 1A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
LT3695HMSE#TRPBF 功能描述:IC REG BUCK ADJ 1A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
LT3695HMSE-3.3#PBF 功能描述:IC REG BUCK 3.3V 1A 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
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