EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC3811EG-PBF

Description
High Speed Dual, Multiphase Step-Down DC/DC Controller
File Size544KB,48 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Compare View All

LTC3811EG-PBF Overview

High Speed Dual, Multiphase Step-Down DC/DC Controller

FEATURES
LTC3811
High Speed Dual,
Multiphase Step-Down DC/DC
Controller
DESCRIPTION
The LTC
®
3811 is a dual, PolyPhase
®
synchronous step-
down switching regulator controller optimized for output
voltages up to 3.3V. The LTC3811 includes high bandwidth
error amplifiers as well as a high speed differential remote
sense amplifier. The sense voltage range is programmable
from 24mV to 85mV, allowing the use of either the inductor
DCR or a discrete sense resistor. Multiphase operation is
made possible using the MODE/SYNC input, the CLKOUT
output and the PHASEMODE control pin, allowing 1-, 2-,
3-, 4-, 6- or 12-phase operation.
Large internal gate drivers minimize switching losses and
allow the use of multiple power MOSFETs connected in
parallel for high current applications.
The operating frequency of the LTC3811 can be programmed
from 250kHz to 750kHz and can also be synchronized to
an external clock using the internal PLL.
Tracking and sequencing are possible with the LTC3811,
and soft-start is programmed with an external capacitor.
Shutdown reduces supply current to 20μA.
, LT LTC, LTM and PolyPhase are registered trademarks of Linear Technology
,
Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 6304066, 5929620, 6177787, 6144194,
6580258, 5705919.
Fixed Frequency, Peak Current Mode Control
±0.5% Output Accuracy Over Temperature
Optimized for Low V
OUT
Applications (Up to 3.3V)
Dual or Single Output, Multiphase Operation
Wide V
IN
Range: 4.5V to 30V Operation
High Speed Differential Remote Sense Amplifier
Inductor DCR or Sense Resistor Capable
Adjustable Peak Current Sense Voltage:
24mV to 85mV
Very Low Duty Cycle Operation: t
ON(MIN)
= 65ns (Typ)
Powerful Internal Gate Drivers
Output Voltage Soft-Start, Tracking and Sequencing
Programmable Load Line for Reduced C
OUT
Clock Input and Output for Up to 12-Phase Operation
Fixed Frequency Operation from 250kHz to 750kHz
PLL Synchronization from 150kHz Up to 900kHz
Selectable CCM or DCM Operation
Available in 5mm × 7mm QFN and G36 Packages
APPLICATIONS
Network Servers
High Current ASIC Supplies
Low Voltage Power Distribution
TYPICAL APPLICATION
Dual Output, 2-Phase Tracking Core and I/O Supply
V
IN
4.5V TO 14V
V
IN
TG1
BOOST1
SW1
BG1
RUN1
RUN2
SENSE1
+
SENSE1
RNG1
V
OUT1
2V
15A
RNG2
FB1
LTC3811
SENSE2
+
SENSE2
DIFF/IN
+
DIFF/IN
DIFF/OUT
FB2
INTV
CC
DRV
CC
TG2
BOOST2
SW2
BG2
PGND
Load Step
V
OUT
100mV/DIV
I
L
5A/DIV
COMP1
COMP2
SS/TRACK1 SGND SS/TRACK2
V
OUT2
1.5V
15A
V
IN
= 12V
V
OUT
= 2V
I
OUT
= 0A to 12.5A
20μs/DIV
3811 TA01b
3811 TA01a
3811f
1

LTC3811EG-PBF Related Products

LTC3811EG-PBF LTC3811 LTC3811EUHF-PBF LTC3811EUHF-TRPBF
Description High Speed Dual, Multiphase Step-Down DC/DC Controller High Speed Dual, Multiphase Step-Down DC/DC Controller High Speed Dual, Multiphase Step-Down DC/DC Controller High Speed Dual, Multiphase Step-Down DC/DC Controller
Open Source ESP32 Color Screen WIFI/BLE Smart Multimeter Production Process (1. Shell and Screen Selection)
Hello everyone, it has been a whole year since I started my full-time business in July last year. During this period, I developed an open source screenless WIFI smart multimeter, which was recognized ...
七云物联 Creative Market
BlueNRG HID routine REPORT_DESC_SIZE cannot be greater than 117
[i=s]This post was last edited by kangear on 2018-4-24 22:48[/i] According to the post by [url=home.php?mod=space&uid=303079]@littleshrimp[/url], the HID routine was transplanted to the SensorTile, an...
kangear ST - Low Power RF
Analysis of China's fingerprint lock market demand
Analysis on the Demand of Fingerprint Lock Market in China in 2009 Release Date: 2009-01-12 09:55:29 Posted by: This site sorted out I want to comment Demand analysis 1. Product demand With the contin...
xyh_521 Industrial Control Electronics
TI Automotive IC Products and Application Solutions (Free Viewing)
Development Trends and In-depth Technical Analysis of In-Vehicle Infotainment Systems The development trend of in-vehicle infotainment systems, including the realization of electronic cockpits, high-d...
arui1999 Automotive Electronics
B station hands-on expert shares: How to "trick" USB charger
Interesting video I saw. There are so many talented people~ Last time I saw some netizens in the forum talking about charger deception, you can refer to this....
木犯001号 Power technology
Grounding information
Share some information about grounding!...
zqjqq88 Analog electronics

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2804  1230  2724  575  1113  57  25  55  12  23 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号