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參數(shù)資料
| 型號： | LTC1574-5 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode |
| 中文描述： | 高效降壓DC / DC轉(zhuǎn)換器的內(nèi)部肖特基二極管 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 226K |
| 代理商： | LTC1574-5 |
1
LTC1574
LTC1574-3.3/LTC1574-5
High Efficiency Step-Down
DC/DC Converters
with Internal Schottky Diode
The LTC
1574 is a family of easy-to-use current mode
DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V
and inverting operation. With an internal 0.9
switch (at
a supply voltage of 12V) and a low forward drop Schottky
diode (0.450V typ at 200mA, T
A
= 25
°
C), the LTC1574
requires only three external components to construct a
complete high efficiency DC/DC converter.
Under no load condition, the LTC1574 draws only 130
μ
A.
In shutdown, it draws a mere 2
μ
A making this converter
ideal for battery-powered applications. In dropout, the
internal P-channel MOSFET switch is turned on continu-
ously allowing the user to maximize the life of the battery
source.
The maximum inductor current of the LTC1574 family is
pin selectable to either 340mA or 600mA, optimizing
efficiency for a wide range of applications. Operation up to
200kHz permits the use of small surface mount inductors
and capacitors.
For applications requiring higher output current or ultra-
high efficiency, see the LTC1148 and LTC1265 data sheets.
For detailed applications information, see the LTC1174
data sheet.
DESCRIPTIO
N
U
FEATURES
High Efficiency Step-Down Converter
TYPICAL APPLICATIO
N
U
+
V
IN
100
μ
H
22
μ
F*
35V
+
100
μ
F*
10V
1574 TA01
5V
175mA
5
2, 4, 13, 15
7
10
3, 14
12
11
6
V
5.5V to
16V
GND
LTC1574-5
LB
IN
LB
OUT
I
PGM
SHDN
V
OUT
SW
*AVX TPSD226K035
*AVX TPSD107K010
COILTRONICS CTX100-4
LTC1574-5 Efficiency
LOAD CURRENT (mA)
1
E
100
95
90
85
80
75
70
10
100
1574 TA02
200
V
IN
= 6V
V
IN
= 9V
L = 100
μ
H
V
OUT
= 5V
I
PGM
= 0V
APPLICATIO
S
U
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
I
Inverting Converters
I
Step-Down Converters
I
Memory Backup Supply
I
Portable Instruments
I
Battery-Powered Equipment
I
Distributed Power Systems
I
High Efficiency: Up to 94%
I
Usable in Noise-Sensitive Products
I
Peak Inductor Current Independent of Inductor Value
I
Short-Circuit Protection
I
Internal Low Forward Drop Schottky Diode
I
Only Three External Components Required
I
Wide V
IN
Range: 4V to 18.5V (Absolute Maximum)
I
Low Dropout Operation
I
Low-Battery Detector
I
Pin Selectable Current Limit
I
Internal 0.9
Power Switch: V
IN
= 12V
I
Standby Current: 130
μ
A
I
Active Low Micropower Shutdown
相關PDF資料 |
PDF描述 |
|---|---|
| LTC1574CS-3.3 | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode |
| LTC1574CS | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode |
| LTC1574CS-5 | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode |
| LTC1574 | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode(可調(diào)輸出，高效率步降DC/DC變換器（內(nèi)部帶肖特基二極管）) |
| LTC1574-3.3 | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode(3.3V,高效率步降DC/DC變換器（內(nèi)部帶肖特基二極管）) |
相關代理商/技術參數(shù) |
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|---|---|
| LTC1574CS | 功能描述:IC REG BUCK INV ADJ 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝: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:- 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 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1574CS#PBF | 功能描述:IC REG BUCK INV ADJ 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型: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 - 開關:2MHz 電流 - 輸出:500mA 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:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC1574CS#TR | 功能描述:IC REG BUCK INV ADJ 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝: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:- 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 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1574CS#TRPBF | 功能描述:IC REG BUCK INV ADJ 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝: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:- 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 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1574CS-3.3 | 功能描述:IC REG BUCK INV 3.3V 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝: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:- 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 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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