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參數(shù)資料
| 型號： | LTC3542IS6#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | LEAD FREE, PLASTIC, MO-193, TSOT-23, 6 PIN |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 211K |
| 代理商： | LTC3542IS6#PBF |
LTC3542
1
3542fa
500mA, 2.25MHz
Synchronous Step-Down
DC/DC Converter
The LTC
3542 is a high efciency 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 ideally suited for
single Li-Ion battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery
life in portable systems. The output voltage is adjustable
from 0.6V to VIN. 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 is specically designed to work
well with ceramic output capacitors, achieving very low
output voltage ripple and a small PCB footprint.
The LTC3542 can be congured for the power saving Burst
Mode Operation. For reduced noise and RF interference,
the MODE/SYNC pin can be congured for pulse skipping
operation.
■ Cellular Telephones
■ Wireless and DSL Modems
■ Digital Cameras
■ MP3 Players
■ PDAs and Other Handheld Devices
■ High Efciency: Up to 96%
■ High Peak Switch Current: 1000mA
■ Low Output Ripple (<20mVP-P Typical)
Burst Mode Operation: Only 26μA
■ Very Low Quiescent Current: Only 26μA
■ 2.5V to 5.5V Input Voltage Range
■ 2.25MHz Constant Frequency Operation
■ 1MHz to 3MHz External Frequency Synchronization
■ Low Dropout Operation: 100% Duty Cycle
■ No Schottky Diode Required
■ Internal Soft-Start Limits Inrush Current
■ 0.6V Reference Allows Low Output Voltages
■ Shutdown Mode Draws <1μA Supply Current
■ ±2% Output Voltage Accuracy
■ Current Mode Operation for Excellent Line and Load
Transient Response
■ Overtemperature Protected
■ Available in 6-Lead 2mm
× 2mm DFN and Small TSOT
, 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
RUN
75k
3542 TA01a
150k
22pF
2.2
μH
CIN
10
μF
CER
COUT
10
μF
CER
SW
VIN
2.7V TO 5.5V
VOUT
1.8V
500mA
VFB
MODE/SYNC
GND
Efciency and Power Loss vs Output Current
OUTPUT CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(mW)
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3542 TA01b
0
100
1000
10
1
0.1
1
VIN = 3.6V
VOUT = 1.8V
FEATURES
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3542IS6-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| LTC3543 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum |
| LTC3543EDCB | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum |
| 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: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 |
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