參數(shù)資料
型號： LTC3403EDD
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, PLASTIC, DFN-8
文件頁數(shù)： 1/16頁
文件大?。?/td> 920K
代理商： LTC3403EDD
1
LTC3403
3403f
APPLICATIU
TYPICAL APPLICATIOU
I
WCDMA Cell Phone Power Amplifiers
I
Wireless Modems
Figure 1a. WCDMA Transmitter Power Supply
Figure 1b. Efficiency vs Output Current
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
V
IN
C
IN
10
μ
F
CER
V
IN
2.7V
TO 5V
*
**
LTC3403
MODE
RUN
REF
2.2
μ
H*
3403 F01a
MURATA LQH32CN2R2M11
TAIYO YUDEN JMK212BJ475MG
TAIYO YUDEN JMK212BJ106MN
3
SW
GDR
V
OUT
GND
C
OUT
**
4.7
μ
F
CER
V
OUT
3
×
V
REF
600mA
WCDMA
RF PA
OUTPUT
PROGRAMMING
DAC
OUTPUT CURRENT (mA)
60
E
70
75
85
95
0.1
10
100
1000
3403 F01b
50
1
80
65
55
90
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 4.2V
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
V
OUT
= 1.8V
1.5MHz, 600mA
Synchronous Step-Down
Regulator with Bypass Transistor
DESCRIPTIOU
The LTC
3403 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
bypass P-channel MOSFET connects V
OUT
directly to V
IN
,
eliminating power loss through the inductor. Selectable
forced continuous mode enables fast V
OUT
response to the
controlling input.
Supply current is only 20
μ
A in Burst Mode
operation and
drops to <1
μ
A in shutdown. The 2.5V to 5V input voltage
range makes the LTC3403 ideally suited for single Li-Ion
battery-powered applications. 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 LTC3403 is available in a low profile 8-lead 3mm
×
3mm DFN package.
FEATURES
I
Dynamically Adjustable Output from 0.3V to 3.5V
I
Very Low Quiescent Current: Only 20
μ
A
During Operation
I
600mA Output Current
I
Internal P-Channel MOSFET Bypass Transistor
I
High Efficiency: Up to 96%
I
1.5MHz Constant Frequency Operation
I
No Schottky Diode Required
I
Low Dropout Operation: 100% Duty Cycle
I
2.5V to 5V Input Voltage Range
I
Drives Optional External P-Channel MOSFET
I
Shutdown Mode Draws <1
μ
A Supply Current
I
Current Mode Operation for Excellent Line and
Load Transient Response
I
Overtemperature Protected
I
Available in 8-Lead 3mm
×
3mm DFN Package
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3403EDD#PBF 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN 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: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
LTC3403EDD#TR 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN 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
LTC3403EDD#TRPBF 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN 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: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
LTC3404 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator
LTC3404EMS8 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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
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