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參數(shù)資料
| 型號： | LTC3543EDCB |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 3 MM, 0.75 MM HEIGHT, PLASTIC, MO-229, DFN-6 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 295K |
| 代理商： | LTC3543EDCB |
LTC3543
1
3543f
600mA Synchronous Step
Down Buck Regulator with PLL,
Soft-Start and Spread Spectrum
The LTC3543 is a high efciency monolithic synchronous
current mode buck regulator.
The switching frequency is internally set at 2.25MHz,
allowing the use of small surface mount inductors and
capacitors. In PLL mode, the LTC3543 can acquire fre-
quencies between 1MHz and 3MHz. Also, the LTC3543
has spread spectrum capability providing a lower noise
regulated output, as well as low noise at the input.
In Burst Mode0peration, the supply current is only 45A,
dropping to <1A in shutdown. The 2.5V to 5.5V input
voltage range makes the LTC3543 ideally suited for single
Li-Ion battery-powered applications. The 100% duty cycle
provides a low dropout operation, extending the battery
life in portable systems. Burst Mode operation increases
efciency at light loads, further extending battery life.
The internal synchronous switch increases efciency and
eliminates the need for an external Schottky diode.
■
Portable Instruments
■
Cellular Phones
■
600mA Output Current
■
2.5V to 5.5V Input Voltage Range
■
2.25MHz Constant Frequency Operation, Spread
Spectrum or Synchronized PLL (1MHz to 3MHz)
■
High Efciency: Up to 95%
■
1A Peak Inductor Current
■
Very Low Quiescent Current: Only 45A During
Burst Mode Operation
■
No Schottky Diode Required
■
Low Dropout Operation: 100% Duty Cycle
■
Overtemperature Protected
■
Stable with Ceramic Capacitors
■
Shutdown Mode Draws <1A Supply Current
■
±2% Output Voltage Accuracy
■
Current Mode Operation for Excellent Line and Load
Transient Response
■
Soft-Start
■
Available in a Low Prole (0.75mm) 2mm × 3mm
6-Lead DFN Package
Efciency and Power Loss vs Load Current
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
2.5V TO 5.5V
3543 TA01
4nF
LTC3543
SW
VIN
VFB
CAP
RUN
MODE
GND
10pF
10
F
3.3
H
10
F
1.5V
VOUT
1.5V
300k
200k
EXPOSED
PAD
MODE = VIN → PULSE SKIP
MODE = VFB → PULSE SKIP WITH SPREAD SPECTRUM
MODE = GND
→ BURST MODE
MODE = EXTERNAL CLOCK
→ PLL
PWR_EN
MODE
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered 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, 6498466, 6611131.
LOAD CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(mW)
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3543 TA01b
0
1000
100
10
0.1
1
VIN = 3.6V
VIN = 4.2V
VIN = 2.7V
Burst Mode ENABLED
POWER LOSS
AT VIN = 3.6V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3543EDCB#PBF | 制造商:Linear Technology 功能描述:REG STEP DOWN 0.6A SMD DFN-6 制造商:Linear Technology 功能描述:REG, STEP DOWN, 0.6A, SMD, DFN-6 |
| LTC3543EDCB#TRMPBF | 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:- 標準包裝: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) 供應商設備封裝:8-SOIC |
| LTC3543EDCB#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:- 標準包裝: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) 供應商設備封裝:8-SOIC |
| LTC3544 | 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 |
| LTC3544B | 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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