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參數(shù)資料
| 型號： | LTC3411 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| 中文描述： | 電流1.25A，4MHz，同步降壓型DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 288K |
| 代理商： | LTC3411 |
LTC3411
1
sn3411 3411fs
The LTC
3411 is a constant frequency, synchronous,
step- down DC/DC converter. Intended for medium power
applications, it operates from a 2.63V to 5.5V input voltage
range and has a user configurable operating frequency up
to 4MHz, allowing the use of tiny, low cost capacitors and
inductors 2mm or less in height. The output voltage is
adjustable from 0.8V to 5V. Internal sychronous 0.11
power switches with 1.6A peak current ratings provide
high efficiency. The LTC3411’s current mode architecture
and external compensation allow the transient response
to be optimized over a wide range of loads and output
capacitors.
The LTC3411 can be configured for automatic power
saving Burst Mode operation to reduce gate charge losses
when the load current drops below the level required for
continuous operation. For reduced noise and RF interfer-
ence, the SYNC/MODE pin can be configured to skip
pulses or provide forced continuous operation.
To further maximize battery life, the P-channel MOSFET is
turned on continuously in dropout (100% duty cycle) with
a low quiescent current of 60
μ
A. In shutdown, the device
draws <1
μ
A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
I
Notebook Computers
I
Digital Cameras
I
Cellular Phones
I
Handheld Instruments
I
Board Mounted Power Supplies
I
Small 10-Lead MSOP or DFN Package
I
Uses Tiny Capacitors and Inductor
I
High Frequency Operation: Up to 4MHz
I
High Switch Current: 1.6A
I
Low R
DS(ON)
Internal Switches: 0.110
I
High Efficiency: Up to 95%
I
Stable with Ceramic Capacitors
I
Current Mode Operation for Excellent Line
and Load Transient Response
I
Short-Circuit Protected
I
Low Dropout Operation: 100% Duty Cycle
I
Low Shutdown Current: I
Q
≤
1
μ
A
I
Low Quiescent Current: 60
μ
A
I
Output Voltages from 0.8V to 5V
I
Selectable Burst Mode
Operation
I
Sychronizable to External Clock
1.25A, 4MHz, Synchronous
Step-Down DC/DC Converter
DESCRIPTIOU
Efficiency vs Load Current
Figure 1. Step-Down 2.5V/1.25A Regulator
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
SYNC/MODE
PGOOD
V
IN
LTC3411
PV
IN
SV
IN
SW
I
TH
SHDN/R
T
PGND
SGND
V
FB
L1
2.2
μ
H
V
2.5V/1.25A
V
2.63V TO 5.5V
887k
412k
1000pF
3411 F01
C2
22
μ
F
13k
C1
22
μ
F
324k
NOTE: IN DROPOUT, THE OUTPUT TRACKS
THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A914BYW-2R2M (D52LC SERIES)
LOAD CURRENT (mA)
E
100
95
90
85
80
75
70
1
100
1000
3411 TA01
10
V
IN
= 3.3V
V
OUT
= 2.5V
f
= 1MHz
Burst Mode OPERATION
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3411A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3411AEDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.25A 10DFN 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 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 |
| LTC3411AEDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.25A 10DFN 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 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 |
| LTC3411AEDD-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3411AEDD-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
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