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参数资料
| 型号： | LTC3543EDCB#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.6A 8DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN（3x2） |
LTC3543
600mA Synchronous Step
Down Buck Regulator with PLL,
Soft-Start and Spread Spectrum
FEATURES
DESCRIPTION
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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 Ef?ciency: Up to 95%
1A Peak Inductor Current
Very Low Quiescent Current: Only 45μA During
Burst Mode Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Overtemperature Protected
Stable with Ceramic Capacitors
Shutdown Mode Draws <1μA Supply Current
± 2% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load
Transient Response
Soft-Start
Available in a Low Pro?le (0.75mm) 2mm × 3mm
6-Lead DFN Package
The LTC ? 3543 is a high ef?ciency 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 Mode ? operation, the supply current is only 45μA,
dropping to <1μA 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
ef?ciency at light loads, further extending battery life.
The internal synchronous switch increases ef?ciency and
eliminates the need for an external Schottky diode.
L , LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
APPLICATIONS
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.
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Portable Instruments
Cellular Phones
TYPICAL APPLICATION
Ef?ciency and Power Loss vs Load Current
2.5V TO 5.5V
10μF
V IN SW
LTC3543
3.3μH
300k
1.5V
10pF
10μF
V OUT
1.5V
100
90
80
70
V IN = 2.7V
V IN = 4.2V
1000
100
PWR_EN
RUN
V FB
60
MODE
MODE
GND
CAP
4nF
200k
50
40
V IN = 3.6V
10
EXPOSED
PAD
3543 TA01a
30
20
POWER LOSS
AT V IN = 3.6V
10
MODE = V IN
MODE = V FB
PULSE SKIP
PULSE SKIP WITH SPREAD SPECTRUM
10
0
Burst Mode OPERATION ENABLED
0.1
MODE = GND
Burst Mode OPERATION
0.1
1
10 100
1000
MODE = EXTERNAL CLOCK
PLL
LOAD CURRENT (mA)
3543 TA01b
3543fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3544 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
| LTC3544B | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
| LTC3544BEUD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
| LTC3544BEUD#PBF | 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3544BEUD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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