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參數(shù)資料
| 型號(hào)： | LTC3404MPMS8#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 204K |
| 代理商： | LTC3404MPMS8#TRPBF |
1
LTC3404
3404fb
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
■ High Efficiency: Up to 95%
■ Very Low Quiescent Current: Only 10
μA
During Operation
■ 600mA Output Current at VIN = 3.3V
■ 2.65V to 6V Input Voltage Range
■ 1.4MHz Constant Frequency Operation
■ No Schottky Diode Required
■ Low Dropout Operation: 100% Duty Cycle
■ Synchronizable from 1MHz to 1.7MHz
■ Selectable Burst Mode
Operation or
Pulse Skipping Mode
■ 0.8V Reference Allows Low Output Voltages
■ Shutdown Mode Draws < 1
μA Supply Current
■
±2% Output Voltage Accuracy
■ Current Mode Control for Excellent Line and
Load Transient Response
■ Overcurrent and Overtemperature Protected
■ Available in 8-Lead MSOP Package
The LTC
3404 is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 10
μA and drops to < 1μA in shutdown. The 2.65V to
6V input voltage range makes the LTC3404 ideally suited
for single Li-Ion battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery
life in portable systems.
Switching frequency is internally set at 1.4MHz, allowing
the use of small surface mount inductors and capacitors.
For noise sensitive applications the LTC3404 can be
externally synchronized from 1MHz to 1.7MHz. Burst
Mode operation is inhibited during synchronization or
when the SYNC/MODE pin is pulled low, preventing low
frequency ripple from interfering with audio circuitry.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.8V feed-
back reference voltage. The LTC3404 is available in a
space saving 8-lead MSOP package.
For higher input voltage (11V abs max) applications, refer
to the LTC1877 data sheet.
■ Cellular Telephones
■ Wireless and DSL Modems
■ Personal Information Appliances
■ Portable Instruments
■ Distributed Power Systems
■ Battery-Powered Equipment
High Efficiency Step-Down Converter
1.4MHz High Efficiency
Monolithic Synchronous
Step-Down Regulator
Efficiency vs Output Load Current
LOAD (mA)
80
75
EFFICIENCY
(%)
85
90
95
100
0.1
10
100
1000
3404 TA02
70
1
VIN = 6V
VIN = 4.2V
VIN = 3.6V
Burst Mode OPERATION
VOUT = 3.3V
L = 4.7
μH
22
μF**
CER
7
6
1
2
5
3
4
SW
VFB
LTC3404
GND
4.7
μH*
10
μF***
CER
47pF
VOUT
3.3V
*
**
***
TOKO D52LC A914BYW-4R7M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
TAIYO-YUDEN CERAMIC LMK325BJ106MN
VOUT CONNECTED TO VIN FOR 2.65V < VIN < 3.3V
887k
20pF
280k
3404 TA01
SYNC
VIN
RUN
ITH
VIN
2.65V
TO 6V
, 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3405 | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:Standalone 250mA Li-Ion Battery Charger in 2 × 2 DFN |
| LTC3405A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3405A-1.375 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.375V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT |
| LTC3405A-1.5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT |
| LTC3405A-1.8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT |
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