參數(shù)資料
型號(hào)： LTC3541EDD#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 10/20頁(yè)
文件大小： 368K
描述： IC REG DL BCK/LINEAR SYNC 10-DFN
產(chǎn)品培訓(xùn)模塊： More Information on LDOs
標(biāo)準(zhǔn)包裝： 2,500
拓?fù)洌?/td> 降壓（降壓）同步（1），線性（LDO）（1）
功能： 任何功能
輸出數(shù)： 2
頻率 - 開(kāi)關(guān)： 2.25MHz
電壓/電流 - 輸出 1： 0.8 V ~ 5 V，500mA
電壓/電流 - 輸出 2： 0.4 V ~ 4.1 V，300mA
帶 LED 驅(qū)動(dòng)器： 無(wú)
帶監(jiān)控器： 無(wú)
帶序列發(fā)生器： 是
電源電壓： 0.9 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 10-WFDFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 10-DFN（3x3）
包裝： 帶卷 (TR)
LTC3541
0
3541fa
LTC3541 will be reset upon the detection of either event.
The N-channel MOSFET incorporated in the VLDO has its
drain connected to the LV
IN
pin as shown in Figure 1. To
ensure reliable operation, the LV
IN
voltage must be stable
before the VLDO is enabled. For the case where the volt-
age on the LV
IN
pin is supplied by the buck regulator, the
internal power supply sequencing logic assures voltages
are applied in the appropriate manner. For the case where
an external supply is used to power the LV
IN
pin, the volt-
age on the LV
IN
pin must be stable before the ENVLDO pin
is brought from a low to a high. Further, the external LV
IN
voltage must be reduced in conjunction with V
IN
whenever
V
IN
is pulled low or removed.
The linear regulator is designed to provide a lower output
current (30mA) than that available from the VLDO. The
linear regulators output pass transistor has its drain tied
to the V
IN
rail. This allows the linear regulator to be turned
on prior to, and independent of, the buck regulator which
ordinarily drives the VLDO. The linear regulator is provided
with thermal protection that is designed to disable the
linear regulator function when the output pass transistors
junction temperature reaches approximately 160癈. In
addition to thermal protection, short-circuit detection is
provided to disable the linear regulator function when a
short-circuit condition is sensed. This circuit is designed
such that an output current of approximately 120mA can
be provided before this circuit will trigger. As detailed in
the Electrical Characteristics, the linear regulator will be
out of regulation when this event occurs. Both the thermal
and short-circuit faults are treated as catastrophic fault
conditions. The LTC3541 will be reset upon the detection
of either event.
The N-channel MOSFET incorporated in the linear regulator
has its drain connected to the V
IN
pin as shown in Figure 1.
The size of this MOSFET and its associated power bussing
is designed to accommodate 30mA of DC current. Currents
above this can be supported for short periods as stipulated
in the Absolute Maximum Ratings section.
Transitioning from linear regulator mode to VLDO mode,
accomplished by bringing ENBUCK from a logic low to a
logic high while ENVLDO is a logic high, is designed to be
as seamless and transient free as possible. The precise
transient response of LV
OUT
due to this transition is a
function of C
OUT
and the load current. Waveforms given
in the Typical Performance Characeristics show typical
transient responses using the minimum C
OUT
of 2.2礔 and
load currents of 1mA and 30mA respectively. Generally, the
amplitude of any transients present will decrease as C
OUT
is increased. To ensure reliable operation and adherence
to the load regulation limits presented in the Electrical
Characteristics table, the load current must not exceed
the linear regulator I
OUT
limit of 30mA within 20ms after
ENBUCK has transitioned to a logic high. The 300mA I
OUT
limit of VLDO applies thereafter. Further, for configurations
that do not use the LTC3541s buck regulator to provide
the VLDO input voltage (LV
IN
), the user must ensure a
stable LV
IN
voltage is present no less than 1ms prior to
ENBUCK transitioning to a logic high.
In a similar manner, transitioning from VLDO mode to
linear regulator mode, accomplished by bringing ENBUCK
from a high low to a logic low while ENVLDO is a logic
high, is designed to be as seamless and transient free as
possible. Again, the precise transient response of LV
OUT
due to this transition is a function of C
OUT
and the load
current. Waveforms given in the Typical Performance
Characeristics show typical transient responses using
the minimum C
OUT
of 2.2礔 and load currents of 1mA
and 30mA respectively. Generally, the amplitude of any
transients present will decrease as C
OUT
is increased.
To ensure reliable operation and adherence to the load
regulation limits presented in the Electrical Characterstics
table, the load current must not exceed the linear regulator
I
OUT
limit of 30mA 1ms prior to ENBUCK transitioning to a
logic low and thereafer. Further, for configurations that do
not use the LTC3541s buck regulator to provide the VLDO
input voltage (LV
IN
), the user must continue to ensure a
stable LV
IN
voltage no less than 1ms after ENBUCK has
transitioned to a logic low.
PERATIO
相關(guān)PDF資料
PDF描述
LTC3670EDDB#TRPBF IC REG TRPL BCK/LINEAR 12DFN
LTC3672BEDC-1#TRPBF IC REG TRPL BCK/LINEAR 8-DFN
LTC3700EMS#TRPBF IC REG DL BUCK/LINEAR 10MSOP
LTC4151HMS#TRPBF IC PWR MONITOR MS 80V SD 10MSOP
LTC4210-2CS6#TRM IC CONTROLLER HOT SWAP TSOT23-6
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3542 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter
LTC3542-1 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter
LTC3542EDC#PBF 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.25MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.25MHZ, 500mA, DFN-6; Primary Input Voltage:5.5V; No. of Outputs:1; Output Current:500mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-DFN ;RoHS Compliant: Yes
LTC3542EDC#TRMPBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN 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:- 產(chǎn)品培訓(xùn)模塊:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色產(chǎn)品:BD91x Series Step-Down Regulators 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)型:兩者兼有 輸出數(shù):2 輸出電壓:3.3V，0.8 V ~ 2.5 V 輸入電壓:4.5 V ~ 5.5 V PWM 型:電流模式 頻率 - 開(kāi)關(guān):1MHz 電流 - 輸出:1.5A 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:20-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:VQFN020V4040 產(chǎn)品目錄頁(yè)面:1373 (CN2011-ZH PDF) 其它名稱(chēng):BD9152MUV-E2TR
LTC3542EDC#TRPBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN 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:500 系列:- 類(lèi)型:切換式電容器（充電泵），反相 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開(kāi)關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱(chēng):LTC1983ES6-3#TRMTR
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*