參數(shù)資料
型號(hào)： LTC3112EDHD#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 12 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 5 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WJGD-2, DFN-16
文件頁(yè)數(shù)： 3/32頁(yè)
文件大?。?/td> 651K
代理商： LTC3112EDHD#TRPBF
LTC3112
11
3112f
OPERATION
INTRODUCTION
The LTC3112 is an extended input and output range,
high current synchronous buck-boost DC/DC converter
optimized for a variety of demanding applications. The
LTC3112 utilizes a proprietary switching algorithm, which
allows its output voltage to be regulated above, below or
equal to the input voltage. The error amplier output on
COMP determines the output duty cycle of the switches.
The low RDS(ON), low gate charge synchronous switches
provide high efciency pulse width modulation control.
High efciency is achieved at light loads when Burst Mode
operation is commanded.
LOW NOISE FIXED FREQUENCY OPERATION
Oscillator, Phase-Locked Loop
An internal oscillator circuit sets the normal frequency of
operation to 750kHz. A pulse train applied to the PWM/SYNC
pin allows the operating frequency to be programmed
between300kHzto1.5MHzviaaninternalphase-lockedloop
circuit. The pulse train must have a minimum high or low
state of at least 100ns to guarantee operation (Note 7).
Error Amplier
The error amplier is a high gain voltage mode amplier.
The loop compensation components are congured
around the amplier (from FB to COMP and VOUT to FB)
to obtain stability of the converter and rapid response
to load transients. Refer to the Applications Information
section of this data sheet under Closing the Feedback
Loop for information on selecting compensation type
and components.
Current Limit Operation
The buck-boost converter has two current limit circuits.
The primary current limit is an average current limit
circuit which sources current into the feedback divider
network proportional to the extent that switch A current
exceeds 6A typical. Due to the high gain of the feedback
loop, the injected current forces the error amplier output
to decrease until the average current through switch A
decreases approximately to the current limit value. The
average current limit utilizes the error amplier in an active
state and thereby provides a smooth recovery with little
overshoot once the current limit fault condition is removed.
Since the current limit is based on the average current
through switch A, the peak inductor current in current
limit will have a dependency on the duty cycle (i.e. on the
input and output voltages) in the overcurrent condition. For
this current limit feature to be most effective, the Thevenin
resistance from the FB to ground should exceed 100kΩ.
The speed of the average current limit circuit is limited by
the dynamics of the error amplier. On a hard output short,
it would be possible for the inductor current to increase
substantially beyond current limit before the average
current limit circuit would react. For this reason, there is a
second current limit circuit which turns off switch A if the
current ever exceeds approximately 160% of the average
current limit value. This provides additional protection in
the case of an instantaneous hard output short.
Should the output become shorted, the average current
limit is reduced to approximately one half of the normal
operating current limit.
Reverse Current Limit
During xed frequency operation, a reverse current
comparator on switch D monitors the current entering
the VOUT pin. When this reverse current exceeds 1A
(typical) switch D will be turned off for the remainder of
the switching cycle. This feature protects the buck-boost
converter from excessive reverse current if the buck-boost
output is above the regulation voltage.
Internal Soft-Start
The LTC3112 buck-boost converter has an independent
internal soft-start circuit with a nominal duration of 2ms.
The converter remains in regulation during soft-start and
will therefore respond to output load transients which
occur during this time. In addition, the output voltage rise
time has minimal dependency on the size of the output
capacitor or load current during start-up.
相關(guān)PDF資料
PDF描述
LTC3113EFE#PBF 16 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO20
LTC3113IDHD#TRPBF 16 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO16
LTC3113IFE#PBF 16 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO20
LTC3125EDCB#TRMPBF SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO8
LTC3127EDD#PBF SWITCHING REGULATOR, PDSO10
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3112EFE#PBF 功能描述:IC REG BUCK BOOST SYNC 20-TSSOP 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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(guān):- 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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
LTC3112EFE#PBF 制造商:Linear Technology 功能描述:IC DC-DC CONV 1.5MHz TSSOP20
LTC3112EFE#TRPBF 功能描述:IC REG BUCK BST SYNC ADJ 20TSSOP 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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(guān):- 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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
LTC3112EFEPBF 制造商:Linear Technology 功能描述:15V 2.5A Synch Buck-Boost DC/DC TSSOP20
LTC3112IDHD#PBF 功能描述:IC REG BUCK BST SYNC ADJ 16-DFN 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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(guān):- 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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
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

*
*
*