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參數資料
| 型號： | LTC3568EDD |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數： | 1/18頁 |
| 文件大?。?/td> | 300K |
| 代理商： | LTC3568EDD |
LTC3568
3568fa
Typical applicaTion
FeaTures
applicaTions
DescripTion
1.8A, 4MHz, Synchronous
Step-Down DC/DC Converter
The LTC3568 is a constant frequency, synchronous
step- down DC/DC converter. Intended for medium power
applications, it operates from a 2.5V to 5.5V input voltage
range and has a user configurable operating frequency
up to 4MHz, allowing the use of tiny, low cost capacitors
and inductors 2mm or less in height. The output voltage
is adjustable from 0.8V to 5V. Internal sychronous 0.11
Ω
power switches with 2.4A peak current ratings provide
high efficiency. The LTC3568’s current mode architecture
and external compensation allow the transient response
to be optimized over a wide range of loads and output
capacitors.
The LTC3568 can be configured for automatic power sav-
ing Burst Mode operation to reduce gate charge losses
when the load current drops below the level required for
continuous operation. For reduced noise and RF interfer-
ence,theSYNC/MODEpincanbeconfiguredtoskippulses
or provide forced continuous operation.
To further maximize battery life, the P-channel MOSFET
is turned on continuously in dropout (100% duty cycle)
with a low quiescent current of 60A. In shutdown, the
device draws <1A.
L
, LT, LTC, LTM, Linear Technology, the Linear logo, OPTI-LOOP and Burst Mode are
registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 6580258, 6304066, 6127815, 6611131.
n
UsesTinyCapacitorsandInductor
n
HighFrequencyOperation:Upto4MHz
n
LowRDS(ON)InternalSwitches:0.110Ω
n
High Efficiency: Up to 96%
n
Stable with Ceramic Capacitors
n
Current Mode Operation for Excellent Line
and Load Transient Response
n
Short-Circuit Protected
n
Low Dropout Operation: 100% Duty Cycle
n
Low Shutdown Current: IQ ≤ 1A
n
Low Quiescent Current: 60A
n
Output Voltages from 0.8V to 5V
n
Selectable Burst Mode Operation
n
Sychronizable to External Clock
n
Small 3mm
× 3mm, 10-Lead DFN Package
n
Notebook Computers
n
Digital Cameras
n
Cellular Phones
n
Handheld Instruments
n
Board Mounted Power Supplies
EfficiencyvsLoadCurrent
Figure1.Step-Down1.8ARegulator
SYNC/MODE
VIN
LTC3568
PVIN
SW
SVIN
PGOOD
ITH
SHDN/RT
PGND
SGND
VFB
L1
2H
VOUT
2.5V/1.8A
VIN
2.5V TO 5.5V
887k
412k
1000pF
3568 F01
22F + 10F
13k
22F
324k
NOTE: IN DROPOUT, THE OUTPUT TRACKS
THE INPUT VOLTAGE
LOAD CURRENT (mA)
EFFICIENCY
(%)
100
95
90
85
80
75
70
POWER
LOSS
(mW)
1000
100
10
1
100
10000
1000
3568 TA01
10
VIN = 3.3V
VOUT = 2.5V
fO = 1MHz
Burst Mode
OPERATION
EFFICIENCY
POWER LOSS
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3568EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.8A 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數: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: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) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3568EDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.8A 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數: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:- 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) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3568EDDPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 5.5V DFN10EP |
| LTC3568IDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.8A 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數: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:- 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) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3568IDD#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic 4MHz 1.8A Synch St 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 4MHz, 1.8A Synch St |
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