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參數(shù)資料
| 型號： | LTC3411IDD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, DFN-10 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 247K |
| 代理商： | LTC3411IDD#TR |
LTC3411
1
3411fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
1.25A, 4MHz, Synchronous
Step-Down DC/DC Converter
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
Figure 1. Step-Down 2.5V/1.25A Regulator
Efciency vs Load Current
n Small 10-Lead MSOP or DFN Package
n Uses Tiny Capacitors and Inductor
n High Frequency Operation: Up to 4MHz
n High Switch Current: 1.6A
n Low RDS(ON) Internal Switches: 0.110Ω
n High Efciency: Up to 95%
n Stable with Ceramic Capacitors
n Current Mode Operation for Excellent Line
and Load Transient Response
n Short-Circuit Protected
n Low Dropout Operation: 100% Duty Cycle
n Low Shutdown Current: IQ ≤ 1μA
n Low Quiescent Current: 60μA
n Output Voltages from 0.8V to 5V
n Selectable Burst Mode
Operation
n Synchronizable to External Clock
n Notebook Computers
n Digital Cameras
n Cellular Phones
n Handheld Instruments
n Board Mounted Power Supplies
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 congurable 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 0.11Ω
power switches with 1.6A peak current ratings provide
high efciency. 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 congured for automatic power sav-
ing 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 congured 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 60μA. In shutdown, the
device draws <1μA.
SYNC/MODE
VIN
LTC3411
PVIN
SW
SVIN
PGOOD
ITH
SHDN/RT
PGND
SGND
VFB
L1
2.2μH
VOUT
2.5V/1.25A
VIN
2.63V TO 5.5V
887k
412k
1000pF
3411 F01
C2
22μF
13k
C1
22μF
324k
NOTE: IN DROPOUT, THE OUTPUT TRACKS
THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A914BYW-2R2M (D52LC SERIES)
LOAD CURRENT (mA)
EFFICIENCY
(%)
100
95
90
85
80
75
70
1
100
1000
3411 TA01
10
VIN = 3.3V
VOUT = 2.5V
fO = 1MHz
Burst Mode OPERATION
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| LTC3411IMS#PBF | 功能描述:IC REG BUCK SYNC ADJ 10MSOP 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:- 設(shè)計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3411IMS#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 10MSOP 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:- 設(shè)計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3412 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| LTC3412A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:3A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| LTC3412AEFE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.25V to 5.5V 16-Pin TSSOP EP |
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