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參數(shù)資料
| 型號： | LTC1503-2 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | High Efficiency Inductorless Step-Down DC/DC Converters |
| 中文描述： | 高效率無電感降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LTC1503-2 |
9
LTC1503-1.8/LTC1503-2
Figure 3. Output Ripple Reduction Techniques
+
V
OUT
LTC1503-X
LTC1503-X
V
OUT
10
μ
F
TANTALUM
0.5
1
μ
F
CERAMIC
+
V
OUT
V
OUT
1503-1.8/2 F03
10
μ
F
TANTALUM
+
10
μ
F
TANTALUM
capacitor on V
OUT
to reduce both the low and high fre-
quency ripple. An RC filter may also be used to reduce high
frequency voltage spikes.
Protection Features
The LTC1503-X contains both thermal shutdown and
short-circuit protection features. The charge pump will
shut down when the junction temperature reaches ap-
proximately 150
°
C and will resume operation once the
junction temperature has dropped back to 125
°
C. The part
will limit output current to 20mA (typ) when a short-circuit
condition (V
OUT
< 150mV) exists to prevent damage to the
internal switches. During start-up, the 20mA current limit
is disabled once V
OUT
reaches 0.7V (typ). The part can
survive an indefinite short from V
OUT
to GND.
Layout Considerations
For best regulation and noise performance, careful board
layout is required. Improper bypassing and grounding
may lead to poor load regulation and output ripple perfor-
mance. All capacitors, especially C
IN
and C
OUT
, must be as
close as possible to the V
IN
and V
OUT
pins. Connecting the
GND pin and all bypass capacitors to an uninterrupted
ground plane is also advised. See Figure 4 for recom-
mended component placement and grounding.
C2
LTC1503-X
GND
C1
V
IN
C
IN
C
OUT
1503-1.8/2 F04
SHDN/SS
V
OUT
Figure 4. Recommended Component Placement and Grounding
APPLICATIOU
W
U
U
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1503CMS8-1.8 | High Efficiency Inductorless Step-Down DC/DC Converters |
| LTC1503CMS8-2 | High Efficiency Inductorless Step-Down DC/DC Converters |
| LTC1503CS8-1.8 | Hex 2-Line To 1-Line Universal Multiplexers With 3-State Outputs 24-SOIC 0 to 70 |
| LTC1503CS8-2 | High Efficiency Inductorless Step-Down DC/DC Converters |
| LTC1503IS8-1.8 | High Efficiency Inductorless Step-Down DC/DC Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1503CMS8-1.8 | 功能描述:IC REG BUCK SWITCHED CAP 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型: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 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型: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 |
| LTC1503CMS8-1.8#PBF | 功能描述:IC REG BUCK SWITCHED CAP 8MSOP 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:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型: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 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型: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 |
| LTC1503CMS8-1.8#PBF | 制造商:Linear Technology 功能描述:DC/DC Charge Pump Converter IC |
| LTC1503CMS8-1.8#TR | 功能描述:IC REG BUCK SWITCHED CAP 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型: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 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型: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 |
| LTC1503CMS8-1.8#TRPBF | 功能描述:IC REG BUCK SWITCHED CAP 8MSOP 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:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型: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 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型: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 |
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