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參數(shù)資料
| 型號： | LTC3446IDE#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 283K |
| 描述： | IC REG TRPL BCK/LINEAR 14-DFN |
| 標(biāo)準(zhǔn)包裝： | 91 |
| 拓?fù)洌?/td> | 降壓（降壓）同步（1），線性（LDO）（2） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 3 |
| 頻率 - 開關(guān)： | 2.25MHz |
| 電壓/電流 - 輸出 1： | 可調(diào)至0.8V，1A |
| 電壓/電流 - 輸出 2： | 可調(diào)至0.4V，300mA |
| 電壓/電流 - 輸出 3： | 可調(diào)至0.4V，300mA |
| 帶 LED 驅(qū)動器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 0.9 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°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-DFN-EP（4x3） |
| 包裝： | 管件 |
LTC3446
7
3446ff
pin FuncTions
MODESEL (Pin 1): Chooses Between Burst Mode Operation
and Pulse-Skipping Operation at Light Loads. Forcing this
pin below 0.3V allows the buck converter to automatically
enter Burst Mode operation at light loads. Forcing this pin
above 1V disallows entering Burst Mode operation; the
buck converter will cycle skip at light loads. Do not leave
this pin floating. This is a MOS gate input.
V
IN
(Pin 2): Input Supply to the LTC3446. Must be
closely decoupled to GND with a 10礔 or greater ceramic
capacitor.
I
TH
(Pin 3): Buck Error Amplifer Output and Servo-Loop
Compensation Point.
PGOOD (Pin 4): Supply Monitor Output, Open-Drain
NMOS.
LV
OUT1
(Pin 5): Output of the First VLDO Regulator.
LV
IN
(Pin 6): Input Supply to the LTC3446s VLDO Circuits.
Bypass LV
IN
to GND with at least a 1礔 low ESR ceramic
capacitor. Typical LTC3446 application circuits will connect
this pin to the output of the buck converter but this is not
required. The VLDO regulators may be used independently
of the buck converter.
LV
OUT2
(Pin 7): Output of the Second VLDO Regulator.
LV
FB2
(Pin 9): Feedback Pin for the Second VLDO Regulator.
An output divider should be connected from LV
OUT2
to LV
FB2
to set the desired LV
OUT2
regulated output voltage.
LV
FB1
(Pin 10): Feedback Pin for the First VLDO Regulator.
An output divider should be connected from LV
OUT1
to LV
FB1
to set the desired LV
OUT1
regulated output voltage.
ENLDO1/ENLDO2 (Pin 11/Pin 8): Enable Pin for the First
and Second VLDO Regulators, Respectively. Forcing this
pin above 1V enables the corresponding VLDO regulator
and forcing this pin below 0.3V shuts it down. Each VLDO
regulator draws <1礎(chǔ) of supply current in shutdown. Do
not leave this pin floating. This is a MOS gate input.
BUCKFB (Pin 12): Buck Converters Feedback Pin. Receives
the feedback voltage from an external resistive divider
across the output. External resistance from this pin to
ground should be equal to or less than 50k.
ENBUCK (Pin 13): Enable Pin for the LTC3446s Buck
Converter Circuit. Forcing this pin above 1V enables the
buck converter and forcing this pin below 0.3V shuts down
the converter. In shutdown, the buck converter draws <1礎(chǔ)
of supply current. Do not leave this pin floating. This is a
MOS gate input.
SW (Pin 14): Switch Node Connection to Inductor. This
pin connects to the drains of the internal main and syn-
chronous power MOSFET switches.
GND (Exposed Pad, Pin 15): Ground. The Exposed Pad is
the only ground and must connect to the PCB ground for
electrical contact and rated thermal performance.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3446IDE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
| LTC3447 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:I2C Controllable Buck Regulator in 3mm × 3mm DFN |
| LTC3447EDD | 功能描述:IC REG BUCK SYNC ADJ 0.6A 10DFN RoHS:否 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:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LTC3447EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 10DFN 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 |
| LTC3447EDD#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 10-Pin DFN EP T/R |
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