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参数资料
| 型号： | LTC3542EDC-1#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 2 X 2 MM, LEAD FREE, PLASTIC, MO-229WCCD-2, DFN-6 |
| 文件页数： | 1/16页 |
| 文件大小： | 235K |
| 代理商： | LTC3542EDC-1#PBF |
LTC3542-1
1
35421f
500mA, 2.25MHz
2.8V Output Synchronous
Step-Down DC/DC Converter
The LTC
3542-1 is a high efciency, xed output voltage
of 2.8V, monolithic synchronous buck converter using a
constant frequency, current mode architecture. Supply
current during operation is only 26μA, dropping to <1μA in
shutdown. The 2.5V to 5.5V input voltage range makes the
LTC3542-1 ideally suited for single Li-Ion battery-powered
applications. 100% duty cycle provides low dropout opera-
tion, extending battery life in portable systems. Internal
power switches are optimized to provide high efciency
and eliminate the need for an external Schottky diode.
Switching frequency is internally set at 2.25MHz, allowing
the use of small surface mount inductors and capacitors,
and it can synchronize to an external clock signal with a
frequency range of 1MHz to 3MHz through the MODE/SYNC
pin. The LTC3542-1 is specically designed to work well
with ceramic output capacitors, achieving very low output
voltage ripple and a small PCB footprint.
The LTC3542-1 can be congured for the power saving
Burst Mode Operation. For reduced noise and RF inter-
ference, the MODE/SYNC pin can be congured for pulse
skipping operation.
n Cellular Telephones
n Wireless and DSL Modems
n Digital Cameras
n MP3 Players
n PDAs and Other Handheld Devices
n High Efciency: Up to 96%
n Fixed Output Voltage: 2.8V
n High Peak Switch Current: 1000mA
n Low Output Ripple (<20mVP-P Typical)
Burst Mode Operation
n Very Low Quiescent Current: Only 26μA
n 2.5V to 5.5V Input Voltage Range
n 2.25MHz Constant Frequency Operation
n 1MHz to 3MHz External Frequency Synchronization
n Low Dropout Operation: 100% Duty Cycle
n No Schottky Diode Required
n Internal Soft-Start Limits Inrush Current
n Shutdown Mode Draws <1μA Supply Current
n ±2% Output Voltage Accuracy
n Current Mode Operation for Excellent Line and Load
Transient Response
n Overtemperature Protected
n Available in 6-Lead 2mm
× 2mm DFN
Efciency and Power Loss vs Output Current
FEATURES
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION
L, LT, LTC, LTM and Burst Mode 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.
VIN
LTC3542-1
RUN
35421 TA01a
2.2μH
10μF
COUT
10μF
CER
SW
VIN
3V TO 5.5V
VOUT
2.8V
500mA
VOUT
MODE/SYNC
GND
LOAD CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(mW)
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
35421 TA01b
0
1000
1
100
10
0.1
1
VIN = 3.6V
VOUT = 2.8V
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3547BIDDB#TRM | 0.7 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3547BEDDB-1#PBF | 0.7 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3547BIDDB#PBF | 0.7 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3560ES6 | 2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3560ES6#TR | 2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3542EDC-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter |
| LTC3542EDC-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| LTC3542EDC-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| LTC3542ES6#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.25MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.25MHZ, 500mA, TSOT-23-6; Primary Input Voltage:5.5V; No. of Outputs:1; Output Current:500mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-TSOT-23 ;RoHS Compliant: Yes |
| LTC3542ES6#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 6-Pin TSOT-23 T/R |
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