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參數(shù)資料
| 型號(hào)： | LTC3544BEUD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.8 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 288K |
| 代理商： | LTC3544BEUD#TR |
LTC3544B
3544bfb
Typical applicaTion
FeaTures
applicaTions
DescripTion
Quad Synchronous
Step-Down Regulator: 2.25MHz,
300mA, 200mA, 200mA, 100mA
The LTC3544B is a quad, high efficiency, monolithic
synchronous buck regulator using a constant frequency,
current mode architecture. The four regulators operate in-
dependentlywithseparaterunpins.The2.25Vto5.5Vinput
voltage range makes the LTC3544B well suited for single
Li-Ion/polymer battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery
runtime in portable systems. At moderate and low output
load levels PWM pulse skip mode operation provides very
low output ripple voltage for noise sensitive applications.
Switching frequency is internally set to 2.25MHz, al-
lowing the use of small surface mount inductors and
capacitors.
The internal synchronous switches increase efficiency
and eliminate the need for external Schottky diodes. Low
outputvoltagesareeasilysupportedwiththe0.8Vfeedback
reference voltage.
The LTC3544B is available in a low profile (0.75mm)
(3mm
× 3mm) QFN package.
■
High Efficiency: Up to 95%
■
Four Independent Regulators Provide Up to 300mA,
200mA, 200mA and 100mA Output Current
■
2.25V to 5.5V Input Voltage Range
■
2.25MHz Constant Frequency Operation
■
No Schottky Diodes Required
■
Low Dropout Operation: 100% Duty Cycle
■
Pulse Skipping at Low Load for Minimum Ripple
■
0.8V Reference Allows Low Output Voltages
■
Shutdown Mode Draws <1A Supply Current
■
Current Mode Operation for Excellent Line and Load
Transient Response
■
Overtemperature Protected
■
Low Profile (3mm
× 3mm) 16-Lead QFN Package
■
Cellular Telephones
■
Personal Information Appliances
■
Wireless and DSL Modems
■
Digital Still Cameras
■
Media Players
■
Portable Instruments
4.7H
3.3H
10H
93.1k
107k
4.7F
CER
4.7F
CER
3.3H
133k
59k
107k
118k
3544B TA01a
4.7F
CER
4.7F
CER
4.7F
CER
VOUT3
0.8V
VOUT1
1.2V
VOUT2
1.5V
VIN
2.25V TO 5.5V
VOUT4
1.8V
RUN200B
SW200B
VFB200B
RUN200A
SW200A
VFB200A
RUN300
SW300
VFB300
RUN100
SW100
VFB100
VCC
PVIN
LTC3544B
GNDA
PGND
100k
High Efficiency Quad Step-Down Converter
LOAD CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
0.0001
0.01
0.1
1
3544B TA01b
0
1
0.1
0.01
0.001
VIN = 2.5V
VIN = 3.6V
VIN = 4.3V
VOUT = 1.5V
TA = 25°C
EFFICIENCY
POWER LOSS
Efficiency vs Load Current, 300mA
Channel, All Other Channels Off
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466,
6611131, 5994885.
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3544EUD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
| LTC3544EUD#PBF | 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN 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 |
| LTC3544EUD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN 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 |
| LTC3544EUDPBF | 制造商:Linear Technology 功能描述:2.25MHz Sync Step-Down Converter LTC3544 |
| LTC3544EUD-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
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