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参数资料
| 型号： | LTC3543EDCB#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 2 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229, DFN-6 |
| 文件页数： | 1/20页 |
| 文件大小： | 329K |
| 代理商： | LTC3543EDCB#PBF |
LTC3543
1
3543fa
n
600mA Output Current
n
2.5V to 5.5V Input Voltage Range
n
2.25MHz Constant-Frequency Operation, Spread
Spectrum or Synchronized PLL (1MHz to 3MHz)
n
High Efciency: Up to 95%
n
1A Peak Inductor Current
n
Very Low Quiescent Current: Only 45μA During
Burst Mode Operation
n
No Schottky Diode Required
n
Low Dropout Operation: 100% Duty Cycle
n
Overtemperature Protected
n
Stable with Ceramic Capacitors
n
Shutdown Mode Draws <1μA Supply Current
n ±2% Output Voltage Accuracy
n
Current Mode Operation for Excellent Line and Load
Transient Response
n
Soft-Start
n
Available in a Low Prole (0.75mm) 2mm
× 3mm
6-Lead DFN Package
TYPICAL APPLICATION
DESCRIPTION
FEATURES
APPLICATIONS
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 Modeoperation, 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
efciency at light loads, further extending battery life.
The internal synchronous switch increases efciency and
eliminates the need for an external Schottky diode.
n
Portable Instruments
n
Cellular Phones
Efciency and Power Loss vs Load Current
2.5V TO 5.5V
3543 TA01a
4nF
LTC3543
SW
VIN
VFB
CAP
RUN
MODE
GND
10pF
10μF
3.3μH
10μF
1.5V
VOUT
1.5V
300k
200k
EXPOSED
PAD
MODE = VIN
PULSE SKIP
MODE = VFB
PULSE SKIP WITH SPREAD SPECTRUM
MODE = GND
Burst Mode OPERATION
MODE = EXTERNAL CLOCK
PLL
PWR_EN
MODE
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 OPERATION ENABLED
POWER LOSS
AT VIN = 3.6V
L, LT, LTC, LTM, Linear Technology, Burst Mode 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.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3543EDCB#TRM | 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3543EDCB | 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3544BEUD#TR | 0.8 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC16 |
| LTC3544EUD | 0.8 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC16 |
| LTC3547BEDDB | 0.7 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
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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