參數(shù)資料
型號(hào)： LTC3100EUD#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 12/26頁(yè)
文件大?。?/td> 403K
描述： IC REG BUCK/BOOST/LINEAR 16-QFN
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）（1），升壓（升壓）（1），線性（LDO）（1）
功能： 任何功能
輸出數(shù)： 3
頻率 - 開關(guān)： 1.5MHz
電壓/電流 - 輸出 1： 0.6 V ~ 5.5 V，250mA
電壓/電流 - 輸出 2： 1.5 V ~ 5.25 V，700mA
電壓/電流 - 輸出 3： 0.6 V ~ 5.25 V，100mA
帶 LED 驅(qū)動(dòng)器： 無
帶監(jiān)控器： 無
帶序列發(fā)生器： 是
電源電壓： 0.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 16-QFN-EP（3x3）
包裝： 帶卷 (TR)
LTC3100
12
3100fb
For more information www.linear.com/LTC3100
OPERATION
The LTC3100 includes an 700mA synchronous step-up
(boost) converter, a 250mA synchronous step-down
(buck) converter and a 100mA low dropout (LDO) linear
regulator housed in a 16-lead 3mm ?3mm QFN package.
Both converters utilize current mode PWM control for
exceptional line and load regulation and operate from the
same 1.5MHz oscillator. The current mode architecture
with adaptive slope compensation also provides excellent
transient load response, requiring minimal output filter-
ing. Both converters have internal soft-start and internal
loop compensation, simplifying the design process and
minimizing the number of external components.
With its low R
DS(ON)
 and low gate charge internal MOSFET
switches and synchronous rectifiers, the LTC3100 achieves
high efficiency over a wide range of load current. Burst
Mode operation maintains high efficiency at very light
loads, but can be disabled for noise-sensitive applications.
With separate power inputs for the boost and buck con-
verters, along with independent enable and power good
functions, the LTC3100 is very flexible. The two converters
can operate from the same input supply, or from two
different sources, or can even be cascaded by powering
the buck converter from the output of the boost converter.
By using the LDO as well, three different output voltages
can be generated from a single alkaline/NiMH cell (or the
LDO can be used for power sequencing the boost output).
Operation can be best understood by referring to the
Block Diagram.
BOOST CONVERTER
Low Voltage Start-Up
The LTC3100 boost converter includes an independent
start-up oscillator designed to start up at an input voltage
of 0.65V (typical). Soft-start and inrush current limiting
are provided during start-up, as well as in normal mode.
When either V
INBST
 or V
BST
 exceeds 1.4V (typical), the IC
enters normal operating mode. Once the output voltage
exceeds the input by 0.24V, the IC powers itself from
V
BST
 instead of V
INBST
. At this point, the internal circuitry
has no dependency on the input voltage, eliminating the
requirement for a large input capacitor. The limiting fac-
tor for the application becomes the ability of the power
source to supply sufficient energy to the output at low
input voltages, and maximum duty cycle of the converter,
which is clamped at 90% (typical). Note that at low input
voltages, even small input voltage drops due to series
resistance become critical, and greatly limit the power
delivery capability of the converter.
LOW NOISE FIXED FREQUENCY OPERATION
Soft-Start
The internal soft-start circuitry ramps the peak boost
inductor current from zero to its peak value of 700mA in
approximately 800祍, allowing start-up into heavy loads.
The soft-start circuitry is reset in the event of a commanded
shutdown or an overtemperature shutdown.
Oscillator
An internal oscillator sets the switching frequency to
1.5MHz. The oscillator allows a maximum duty cycle of
90% (typical) for the boost converter.
Shutdown
The boost converter is shut down by pulling the RUNBST
pin below 0.3V, and activated by pulling the RUNBST pin
above 0.9V. Note that RUNBST can be driven above V
IN
 
or V
OUT
, as long as it is limited to less than the absolute
maximum rating.
Error Amplifier
The error amplifier is a transconductance type. The non-in-
verting input is internally connected to the 1.20V reference
and the inverting input is connected to FBBST. Clamps limit
the minimum and maximum error amp output voltage for
improved large signal transient response. Power converter
control loop compensation is provided internally. A voltage
divider from V
BST
 to ground programs the output voltage
(via FBBST) from 1.5V to 5.25V, according to the formula:
 
V
BST
=1.20V" 1+
R2
R1
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
相關(guān)PDF資料
PDF描述
LTC3104IMSE#TRPBF IC REG DL BCK/LINEAR SYNC 16MSOP
LTC3445EUF#TRPBF IC REG TRPL BUCK/LINEAR 24-QFN
LTC3446IDE#PBF IC REG TRPL BCK/LINEAR 14-DFN
LTC3537EUD#TRPBF IC REG DL BST/LINEAR SYNC 16-QFN
LTC3541EDD#TRPBF IC REG DL BCK/LINEAR SYNC 10-DFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3101 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Output Regulator with Sequencing and I2C
LTC3101_10 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide VIN, Multi-Output DC/DC Converter and PowerPath Controller
LTC3101EUF#PBF 功能描述:IC BUCK/BST TRPL ADJ 350MA 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:PowerPath™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤 包裝:管件 產(chǎn)品目錄頁(yè)面:1410 (CN2011-ZH PDF)
LTC3101EUF#TRPBF 功能描述:IC BUCK/BST TRPL ADJ 350MA 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:PowerPath™ 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3101EUF-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide VIN, Multi-Output DC/DC Converter and PowerPath Controller
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

*
*
*