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參數(shù)資料
| 型號(hào)： | LTC3525DESC6-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.45 A SWITCHING REGULATOR, PDSO6 |
| 封裝： | PLASTIC, MO-203AB, SC-70, 6 PIN |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 220K |
| 代理商： | LTC3525DESC6-3.3 |
LTC3525D-3.3
6
3525d33f
OPERATIO
U
The LTC3525D is a high performance Burst Mode operation
only, synchronous boost converter requiring only three
small external components. Its simplicity and small size
make it a high efciency alternative to charge pump designs.
It is designed to start-up from a single alkaline or nickel
cell, with input voltages as low as 0.85V, or from two or
three cells (or a Li-ion battery), with voltages as high as
4.5V. Once started, VIN can be as low as 0.5V (depend-
ing on load current) and maintain regulation. The output
voltage is preset internally to 3.3V. Peak switch current is
400mA minimum, providing regulation with load currents
up to 150mA, depending on input voltage.
Synchronous rectication provides high efciency opera-
tion while eliminating the need for an external Schottky
diode.
The LTC3525D can maintain regulation with an input
voltage equal to or greater than VOUT. Note, however, that
the synchronous rectier is not enabled in this mode,
resulting in lower efciency and reduced output current
capability.
The operating quiescent current is only 7A typical, allow-
ing the converter to maintain high efciency at extremely
light loads.
Shutdown
The LTC3525D is shut down by pulling SHDN below 0.4V,
and made active by raising it above 1V. Note that SHDN can
be driven as high as 6V, however, if it is more than 0.9V
above the higher of VIN or VOUT, the SHDN input current
will increase from zero to 1.5A.
After the SHDN pin rises, there is a short delay before
switching starts. The delay is 20s to 120s, depending
on input voltage (see Typical Performance Characteristics
curve).
Pass-Through Mode
When the LTC3525D is in shutdown, the internal P channel
MOSFET switch is turned on. This allows VIN to be con-
nected to VOUT through the inductor in shutdown, creating
a pass-through mode.
Start-up
A start-up oscillator allows the LTC3525D to start with input
voltages as low as 1V. It remains in start-up mode until
two conditions are met. VOUT must exceed VIN by at least
0.2V typical and either VIN or VOUT must be greater than
1.8V typical.
During startup, the synchronous rectier is not enabled,
and the internal P-channel synchronous rectier acts as
a follower, causing the peak voltage on SW to reach (VIN
+ 1V) typical. This limits inrush current by maintaining
control of the inductor current when VOUT is less than VIN.
To reduce power dissipation in the P-channel synchronous
rectier when the output is shorted, a foldback feature is
incorporated that reduces the peak inductor current when
VIN is more than 1.7V greater than VOUT.
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| LTC3525ESC6-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LTC3525ESC6-3#PBF | 制造商:Linear Technology 功能描述:IC SYNC STEP-UP DC/DC CONVERTER SC70-6 制造商:Linear Technology 功能描述:IC, SYNC STEP-UP DC/DC CONVERTER, SC70-6 制造商:Linear Technology 功能描述:IC, SYNC STEP-UP DC/DC CONVERTER, SC70-6; Primary Input Voltage:1.2V; No. of Outputs:1; Output Voltage:3V; Output Current:400mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LTC3525ESC6-3#TRMPBF | 功能描述:IC REG BOOST SYNC 3V 0.4A SC70-6 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: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(guān):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(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 |
| LTC3525ESC6-3#TRPBF | 功能描述:IC REG BOOST SYNC 3V 0.4A SC70-6 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(wú) 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 |
| LTC3525ESC6-3.0 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 0.85V to 4.5V 6-Pin SC-70 |
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