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參數(shù)資料
| 型號： | LTC3442 |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation |
| 中文描述： | 微功率同步降壓升壓與自動突發(fā)模式的DC / DC轉(zhuǎn)換器操作 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 332K |
| 代理商： | LTC3442 |
LTC3442
6
3442f
PIU
SHDN/SS (Pin 1):
Combined Soft-Start and Shutdown.
Applied voltage <0.4V shuts down the IC. Tie to >1.4V to
enable the IC and >2.4V to ensure the error amp is not
clamped from soft-start. An RC network from the shut-
down command signal to this pin will provide a soft-start
function by limiting the rise time of the V
C
pin.
R
T
(Pin 2):
Programs the Frequency of the Internal Oscil-
lator. Place a resistor from this pin to ground. See the
Applications Information section for component value
selection.
SGND (Pin 3):
Signal Ground for the IC.
SW1 (Pin 4):
Switch Pin Where Internal Switches A and B
are Connected. Connect inductor from SW1 to SW2. An
optional Schottky diode can be connected from SW1 to
ground for a moderate efficiency improvement. Minimize
trace length to reduce EMI.
PGND (Pin 5, 13):
Power Ground for the Internal NMOS
Power Switches. The exposed pad must be soldered to
PCB ground to provide both electrical contact and a good
thermal contact to the PCB.
SW2 (Pin 6):
Switch Pin Where Internal Switches C and D
are Connected. An optional Schottky diode can be con-
nected from SW2 to V
OUT
for a moderate efficiency im-
provement. Minimize trace length to reduce EMI.
BURST (Pin 7):
Used to set the Automatic Burst Mode
Operation Threshold. Place a resistor and capacitor in
parallel from this pin to ground. See the Applications
Information section for component value selection. For
manual control, ground the pin to force Burst Mode
operation, connect to V
OUT
to force fixed frequency mode.
V
OUT
(Pin 8):
Output of the Synchronous Rectifier. A filter
capacitor is placed from V
OUT
to GND. A ceramic bypass
capacitor is recommended as close to the V
OUT
and GND
pins as possible.
V
IN
(Pin 9):
Input Supply Pin. Internal V
CC
for the IC. A
10
μ
F ceramic capacitor is recommended as close to V
IN
and SGND as possible.
R
LIM
(Pin 10):
Sets the Average Input Current Limit
Threshold. Place a resistor and capacitor in parallel from
this pin to ground. See the Applications Information
section for component value selection.
V
C
(Pin 11):
Error Amp Output. A frequency compensation
network is connected from this pin to FB to compensate
the loop. During Burst Mode operation, V
C
is internally
connected to a hold circuit.
FB (Pin 12):
Feedback Pin. Connect resistor divider tap
here. The output voltage can be adjusted from 2.4V to
5.25V. The feedback reference voltage is typically 1.22V.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3442EDE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.4V to 5.5V 12-Pin DFN EP |
| LTC3442EDE#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN 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)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3442EDE#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.4V to 5.5V 12-Pin DFN EP T/R |
| LTC3442EDE#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN 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:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3443 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter |
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