參數(shù)資料
型號(hào)： LTC3404EMS8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator
中文描述： 1.5 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PDSO8
封裝： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 241K
代理商： LTC3404EMS8
1
LTC3404
APPLICATIU
I
Cellular Telephones
I
Wireless and DSL Modems
I
Personal Information Appliances
I
Portable Instruments
I
Distributed Power Systems
I
Battery-Powered Equipment
FEATURES
DESCRIPTIOU
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
μ
A and drops to < 1
μ
A 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIOU
I
High Efficiency: Up to 95%
I
Very Low Quiescent Current: Only 10
μ
A
During Operation
I
600mA Output Current at V
IN
= 3.3V
I
2.65V to 6V Input Voltage Range
I
1.4MHz Constant Frequency Operation
I
Synchronizable from 1MHz to 1.7MHz
I
Selectable Burst Mode
TM
Operation or
Pulse Skipping Mode
I
No Schottky Diode Required
I
Low Dropout Operation: 100% Duty Cycle
I
0.8V Reference Allows Low Output Voltages
I
Shutdown Mode Draws < 1
μ
A Supply Current
I
±
2% Output Voltage Accuracy
I
Current Mode Control for Excellent Line and
Load Transient Response
I
Overcurrent and Overtemperature Protected
I
Available in 8-Lead MSOP Package
High Efficiency Step-Down Converter
1.4MHz High Efficiency
Monolithic Synchronous
Step-Down Regulator
Efficiency vs Output Load Current
LOAD (mA)
80
75
E
85
90
95
100
0.1
10
100
1000
3404 TA02
70
1
V
IN
= 6V
V
IN
= 4.2V
V
IN
= 3.6V
Burst Mode OPERATION
V
= 3.3V
L = 4.7
μ
H
22
μ
F**
CER
7
6
1
2
5
3
4
SW
V
FB
LTC3404
GND
4.7
μ
H*
10
μ
F***
CER
47pF
V
3.3V
*
**
***
TOKO D52LC A914BYW-4R7M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
TAIYO-YUDEN CERAMIC LMK325BJ106MN
V
OUT
CONNECTED TO V
IN
FOR 2.65V < V
IN
< 3.3V
887k
20pF
280k
3404 TA01
SYNC
V
IN
RUN
I
TH
V
IN
2.65V
TO 6V
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3404EMS8#PBF 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LTC3404EMS8#TR 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)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(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 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(yīng)商設(shè)備封裝:8-SOIC
LTC3404EMS8#TRPBF 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)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(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 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(yīng)商設(shè)備封裝:8-SOIC
LTC3404EMS8PBF 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 2.65-6V MSOP8
LTC3404IMS8 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 1.4MHz High Eff Synch Step-dn Reg
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