參數(shù)資料
型號： LTC3780EUH
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： DIODE SCHOTTKY SINGLE 25V 200mW 0.4V-vf 200mA-IFM 10mA-IF 0.5uA-IR SOD-323 3K/REEL
中文描述： 3 A SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-32
文件頁數(shù)： 15/28頁
文件大?。?/td> 421K
代理商： LTC3780EUH
15
LTC3780
3780f
OPERATIOU
OUTPUT OVERVOLTAGE PROTECTION
An overvoltage comparator guards against transient over-
shoots (>7.5%) as well as other more serious conditions
that may overvoltage the output. In this case, Synchro-
nous Switch B and Synchronous Switch D are turned on
until the overvoltage condition is cleared or the maximum
negative current limit is reached. When inductor current is
lower than the maximum negative current limit, Synchro-
nous Switch B and Synchronous Switch D are turned off,
and Switch A and Switch C are turned on until the inductor
current reaches another negative current limit. If the
comparator still detects an overvoltage condition, Switch
A and Switch C are turned off, and Synchronous Switch B
and Synchronous Switch D are turned on again.
SHORT-CIRCUIT PROTECTION AND CURRENT LIMIT
Switch A on-time is limited by output voltage. When
output voltage is reduced and is lower than its nominal
level, Switch A on-time will be reduced.
In every Boost mode cycle, current is limited by a voltage
reference, which is proportional to the I
TH
pin voltage. The
maximum sensed current is limited to 160mV. In every
Buck mode cycle, the maximum sensed current is limited
to 130mV.
STANDBY MODE PIN
The STBYMD pin is a three-state input that controls
circuitry within the IC as follows: When the STBYMD pin
is held at ground, the SS pin is pulled to ground. When the
pin is left open, the internal SS current source charges the
SS capacitor, allowing turn-on of the controller and acti-
vating necessary internal biasing. When the STBYMD pin
is taken above 2V, the internal linear regulator is turned on
independent of the state on the RUN and SS pins, provid-
ing an output power source for “wake-up” circuitry.
Decouple the pin with a small capacitor (0.1
μ
F) to ground
if the pin is not connected to a DC potential.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3780EUH#PBF 功能描述:IC REG CTRLR BST PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LTC3780EUH#PBF 制造商:Linear Technology 功能描述:DC/DC Converter IC
LTC3780EUH#TR 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 32-Pin QFN EP T/R
LTC3780EUH#TRPBF 功能描述:IC REG CTRLR BST PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3780EUHPBF 制造商:Linear Technology 功能描述:DC-DC Controller Step-Up/Down 36V QFN32
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