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參數(shù)資料
| 型號(hào)： | LT3439 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Slew Rate Controlled Ultralow Noise1A Isolated DC/DC Transformer Driver |
| 中文描述： | 擺率控制的超低Noise1A隔離DC / DC變壓器驅(qū)動(dòng) |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 196K |
| 代理商： | LT3439 |
1
LT3439
sn3439 3439fs
Slew Rate Controlled
Ultralow Noise1A Isolated
DC/DC Transformer Driver
I
Reduced Conducted and Radiated EMI
I
Single Resistor Control of Output Switch Voltage
and Current Slew Rates
I
Cross Conduction Prevention Circuitry
I
Two 1A Current Limited Power Switches
I
Low Minimum Supply Voltage: 2.8V
I
Low Shutdown Current: <20
μ
A
I
50% Duty Cycle
I
20kHz to 250kHz Oscillator Frequency
I
Synchronizable to 300kHz
I
Overcurrent and Overtemperature Protected
I
Low Noise Isolated Supplies
I
Radio and Telecom Supplies
I
Distributed Supplies
I
Medical Instruments
I
Precision Instruments
I
Low Noise Filament Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Noise 5V to 5V Push-Pull DC/DC Transformer
The LT
3439 is a push-pull DC/DC transformer driver that
reduces conducted and radiated electromagnetic interfer-
ence (EMI). Ultralow noise and EMI are achieved by
controlling the output switch voltage and current slew
rates. Slew rates are user adjustable to optimize output
noise versus efficiency. The LT3439 can reduce high
frequency harmonic content by as much as 40dB with only
a minor decrease in efficiency.
The LT3439 includes two 1A current limited power switches
to ensure start-up under heavy loads. It also includes an
oscillator that can be synchronized to an external clock for
more accurate placement of switcher harmonics. Protec-
tion features include current limiting, undervoltage lock-
out, thermal shutdown and cross conduction prevention
circuitry.
The LT3439 is available in a thermally enhanced 16-pin
TSSOP with an exposed backside.
V
IN
SHDN
3
14
4
7
6
5
11
V
IN
5V
1, 16
13
C
IN
22
μ
F
10V
L1 33
μ
H
OPTIONAL
D1
A
B
D2
T1
V
OUT
5V
500mA
680pF
10
LT3439
SYNC
C
T
R
T
GND
16.9k
34k
C1
47
μ
F
6.3V
C
: MURATA GRM235Y5V226Z10
C1, C2: TDK C4532X5R0J476M
D1, D2: MBR0520
L1: TDK SLF6028T-330MR69
T1: COILTRONICS 15835
C2
47
μ
F
6.3V
3439 TA01
COL A
COL B
R
SL
PGND
B
200
μ
V/DIV
A
20mV/DIV
5V Output Noise
5
μ
s/DIV
3439 TA01b
DESCRIPTIOU
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3439EFE | Microprocessor Crystal; Frequency:27MHz; Frequency Tolerance:20ppm; Load Capacitance:18pF; Crystal Terminals:Radial Leaded; ESR:25ohm; Leaded Process Compatible:Yes; Mounting Type:Through Hole; No. of Pins:2 RoHS Compliant: Yes |
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| LT3468-1 | Photoflash Capacitor Charger in ThinSOT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3439EFE | 功能描述:IC REG PSH-PLL CTRLR ISO 16TSSOP 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: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 |
| LT3439EFE#PBF | 功能描述:IC REG PSH-PLL CTRLR ISO 16TSSOP 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 |
| LT3439EFE#TR | 功能描述:IC REG PSH-PLL CTRLR ISO 16TSSOP 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: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 |
| LT3439EFE#TRPBF | 功能描述:IC REG PSH-PLL CTRLR ISO 16TSSOP 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 |
| LT3439EFEPBF | 制造商:Linear Technology 功能描述:LT3439 1A ULN dc-dc transformer driver |
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