參數(shù)資料
型號(hào)： LTC3408EDD
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor
中文描述： 1.3 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, M0-229-WEED-1, DFN-8
文件頁數(shù)： 1/12頁
文件大?。?/td> 156K
代理商： LTC3408EDD
1
LTC3408
3408f
■
WCDMA Cell Phone Power Amplifiers
■
Wireless Modems
WCDMA Transmitter Power Supply
, LTC and LT are registered trademarks of Linear Technology Corporation.
U.S. Patent Numbers: 5481178, 6580258, 6304066, 6127815, 6498466, 6611131
1.5MHz, 600mA
Synchronous Step-Down
Regulator with Bypass Transistor
■
Dynamically Adjustable Output from 0.3V to 3.5V
■
600mA Output Current
■
Internal 0.08
P-Channel MOSFET Bypass
Transistor
■
High Efficiency: Up to 96%
■
1.5MHz Constant Frequency Operation
■
No Schottky Diode Required
■
Low Dropout Operation: 100% Duty Cycle
■
2.5V to 5V Input Voltage Range
■
Shutdown Mode Draws <1
μ
A Supply Current
■
Current Mode Operation for Excellent Line and
Load Transient Response
■
Overtemperature Protected
■
Available in 8-Lead 3mm
×
3mm DFN Package
The LTC
3408 is a high efficiency monolithic synchro-
nous buck regulator optimized for WCDMA power ampli-
fier applications. The output voltage can be dynamically
programmed from 0.3V to 3.5V. At V
OUT
> 3.6V an internal
0.08
bypass P-channel MOSFET connects V
OUT
directly
to V
IN
, eliminating power loss through the inductor.
The input voltage range is 2.5V to 5V making the LTC3408
ideally suited for single Li-Ion battery-powered applica-
tions. 100% duty cycle provides low dropout operation,
extending battery life in portable systems.
Switching frequency is internally set at 1.5MHz, allowing
the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode.
The LTC3408 is available in a low profile (0.75mm) 8-lead
3mm
×
3mm DFN package.
Efficiency Power Lost vs Load Current
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
V
IN
C
IN
10
μ
F
CER
V
IN
2.7V
TO 5V
*
**
LTC3408
RUN
REF
4.7
μ
H*
3403 TA01
MURATA LQH32CN4R7M11
TAIYO YUDEN JMK212BJ475MG
TAIYO YUDEN JMK212BJ106MN
SW
V
OUT
GND
C
OUT
**
4.7
μ
F
CER
V
OUT
3
×
V
REF
600mA
WCDMA
RF PA
OUTPUT
PROGRAMMING
DAC
LOAD CURRENT (mA)
1
0.01
P
E
0.01
0.1
1
0
20
10
60
30
70
40
80
50
90
100
10
100
1000
3408 F04
V
OUT
= 1.2V
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 2.5V
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3408EDD#PBF 功能描述:IC REG BUCK W/BYPASS TXRX 8-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3408EDD#TR 功能描述:IC REG BUCK W/BYPASS TXRX 8-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3408EDD#TRPBF 功能描述:IC REG BUCK W/BYPASS TXRX 8-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3409 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Low Vin Buck Regulator in 3mm x 3mm DFN
LTC3409A 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Low VIN Buck Regulator in 3mm × 3mm DFN
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