參數(shù)資料
型號(hào): LTC1911-15
廠商: Linear Technology Corporation
英文描述: Low Noise, High Efficiency, Inductorless Step-Down DC/DC Converter
中文描述: 低噪聲,無(wú)電感器步高效型DC / DC轉(zhuǎn)換器
文件頁(yè)數(shù): 10/12頁(yè)
文件大?。?/td> 200K
代理商: LTC1911-15
10
LTC1911-1.5/LTC1911-1.8
sn1911 1911is
APPLICATIU
is needed to ensure that minimum capacitance values are
met over operating temperature and bias voltage.
Table 1 is a list of ceramic capacitor manufacturers and
how to contact them.
W
U
U
Table 1. Ceramic Capacitor Manufacturers
AVX
1-(803)-448-1943
Kemet
1-(864) 963-6300
Murata
1-(800) 831-9172
Taiyo Yuden
1-(800) 348-2496
Vishay
1-(800) 487-9437
www.avxcorp.com
www.kemet.com
www.murata.com
www.t-yuden.com
www.vishay.com
Layout Considerations
Due to the high switching frequency and transient cur-
rents produced by the LTC1911, careful board layout is
necessary for optimal performance. A true ground plane
and short connections to all capacitors will optimize
performance, reduce noise and ensure proper regulation
over all conditions. Figure 3 shows the recommended
layout configuration.
Additional output filtering can be achieved by placing a
second output capacitor, connected to the ground plane,
about 2cm or more from the LTC1911 output capacitor
(C4). The inductance of the trace running to the second
output capacitor will significantly attenuate the high speed
switching transients of the LTC1911. Even small capaci-
tors as low as 0.1
μ
F will provide excellent results.
Thermal Management
The power dissipation in the LTC1911 can cause the
junction temperature to rise at rates of up to 160
°
C/W. If
the specified operating conditions are followed, the junc-
tion temperature should never exceed the 160
°
C thermal
shutdown temperature. The junction temperature can
come very close and possibly exceed the specified 125
°
C
operating junction temperature. To reduce the maximum
junction temperature, a good thermal connection to the PC
board is recommended. Connecting the GND pin (Pin 4) to
a ground plane, and maintaining a solid ground plane
under the device on two layers of the PC board, can reduce
the thermal resistance of the package and PC board
considerably.
C1
1911 F03
C4
OUT
GND
C2
V
IN
SS/SHDN
: CONNECT TO GND PLANE ON BACK OF BOARD
C3
U1
Figure 3. Recommended Component Placement and Grounding
相關(guān)PDF資料
PDF描述
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參數(shù)描述
LTC1911EMS8-1.5#PBF 功能描述:IC REG BUCK 1.5V 0.25A 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:升壓(升壓) 輸出類(lèi)型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式,混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1911EMS8-1.5#TR 功能描述:IC REG BUCK 1.5V 0.25A 8MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:升壓(升壓) 輸出類(lèi)型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式,混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1911EMS8-1.5#TRPBF 功能描述:IC REG BUCK 1.5V 0.25A 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:升壓(升壓) 輸出類(lèi)型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式,混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1911EMS8-1.8 功能描述:IC REG BUCK 1.8V 0.25A 8MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:升壓(升壓) 輸出類(lèi)型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式,混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1911EMS8-1.8#PBF 功能描述:IC REG BUCK 1.8V 0.25A 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類(lèi)型:降壓(降壓) 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON(1.45x1) 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2