5秒后页面跳转
捷配首页

Datasheet > LTC3858
LTC3858 PDF预览

LTC3858

更新时间： 2023-12-20 18:45:55
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
38页 424K
描述
低 Iq、双通道、两相、同步降压型控制器

阅读下载

中文翻译

获取价格

LTC3858 数据手册

 浏览型号LTC3858的Datasheet PDF文件第2页浏览型号LTC3858的Datasheet PDF文件第3页浏览型号LTC3858的Datasheet PDF文件第4页浏览型号LTC3858的Datasheet PDF文件第5页浏览型号LTC3858的Datasheet PDF文件第6页浏览型号LTC3858的Datasheet PDF文件第7页 
LTC3858  
Low I , Dual  
Q
2-Phase Synchronous  
Step-Down Controller  
FEATURES  
DESCRIPTION  
The LTC®3858 is a high performance dual step-down  
switching regulator controller that drives all N-channel  
synchronouspowerMOSFETstages.Aconstantfrequency  
current mode architecture allows a phase-lockable fre-  
quency of up to 850kHz. Power loss and noise due to the  
input capacitor ESR are minimized by operating the two  
controller outputs out of phase.  
n
Low Operating I : 170μA (One Channel On)  
Q
n
n
n
n
Wide Output Voltage Range: 0.8V ≤ V  
≤ 24V  
OUT  
Wide V Range: 4V to 38V  
IN  
R
or DCR Current Sensing  
SENSE  
Out-of-Phase Controllers Reduce Required Input  
Capacitance and Power Supply Induced Noise  
OPTI-LOOP® Compensation Minimizes C  
n
n
n
n
OUT  
Phase-Lockable Frequency (75kHz-850kHz)  
Programmable Fixed Frequency (50kHz-900kHz)  
Selectable Continuous, Pulse-Skipping or  
Burst Mode® Operation at Light Loads  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start  
The 170ꢀA no-load quiescent current extends operating  
life in battery-powered systems. OPTI-LOOP compensa-  
tion allows the transient response to be optimized over  
a wide range of output capacitance and ESR values. The  
LTC3858 features a precision 0.8V reference and a power  
goodoutputindicator. Awide4Vto38Vinputsupplyrange  
encompasses a wide range of intermediate bus voltages  
and battery chemistries.  
n
n
n
n
n
n
n
n
n
Power Good Output Voltage Monitor  
Output Overvoltage Protection  
Output Latch-Off Protection During Short Circuit  
Independent soft-start pins for each controller ramp the  
outputvoltagesduringstart-up.Theoutputlatch-offfeature  
protects the circuit in short-circuit conditions.  
Low Shutdown I : 8μA  
Q
Internal LDO Powers Gate Drive from V or EXTV  
IN  
CC  
No Current Foldback During Start-Up  
Small 5mm × 5mm QFN Package  
For a leaded 28-lead SSOP package with a fixed current  
limit and one PGOOD output, without phase modulation  
or a clock output, see the LTC3858-1 data sheet.  
APPLICATIONS  
n
L,LT,LTC,LTM,BurstMode,OPTI-LOOP,μModule,PolyPhase,LinearTechnologyandtheLinear  
Automotive Systems  
logoareregisteredtrademarksandNoR  
andUltraFastaretrademarksofLinearTechnology  
SENSE  
n
Battery Operated Digital Devices  
Corporation.Allothertrademarksarethepropertyoftheirrespectiveowners.ProtectedbyU.S.  
Patents,including5481178,5705919,5929620,6100678,6144194,6177787,6304066,6580258.  
n
Distributed DC Power Systems  
TYPICAL APPLICATION  
High Efficiency Dual 8.5V/3.3V Step-Down Converter  
V
Efficiency and Power Loss  
IN  
9V TO 38V  
22μF  
50V  
vs Load Current  
4.7μF  
V
INTV  
CC  
100  
90  
10000  
1000  
100  
10  
IN  
TG1  
TG2  
0.1μF  
0.1μF  
BOOST1  
SW1  
BOOST2  
SW2  
3.3μH  
7.2μH  
80  
EFFICIENCY  
70  
BG1  
BG2  
60  
50  
LTC3858  
POWER LOSS  
PGND  
+
+
40  
30  
20  
10  
0
SENSE1  
SENSE1  
SENSE2  
0.01Ω  
193k  
0.007Ω  
–
1
–
V
8.5V  
3.5A  
SENSE2  
OUT2  
V
V
IN  
V
= 12V  
= 3.3V  
OUT1  
3.3V  
5A  
V
FB1  
V
FB2  
OUT  
FIGURE 12 CIRCUIT  
62.5k  
I
I
TH2  
TH1  
SS1  
0.1  
150μF  
680pF  
15k  
680pF  
150μF  
SGND  
SS2  
0.0001 0.001  
0.01  
0.1 10  
1
20k  
OUTPUT CURRENT (A)  
20k  
15k  
0.1μF  
0.1μF  
3858 TA01b  
3858 TA01  
3858fc  
1
1234567...38

中文翻译

下载PDF

与LTC3858相关器件

型号 品牌 获取价格 描述 数据表
LTC3858-1 Linear Systems

获取价格

 		60V Low IQ, Dual, 2-Phase Synchronous Step-Down
LTC3858-1 Linear

获取价格

 		Low IQ, Dual 2-Phase Synchronous Step-Down Controller
LTC3858-1 ADI

获取价格

 		低 Iq、双通道、两相、同步降压型控制器
LTC3858-2 Linear

获取价格

 		Low IQ, Dual 2-Phase Synchronous Step-Down Controller
LTC3858-2 ADI

获取价格

 		低 IQ、双通道、两相、同步降压型控制器
LTC3858-2_15 Linear

获取价格

 		Low IQ, Dual 2 Phase Synchronous Step-Down Controller
LTC3858EGN-1 Linear

获取价格

 		Low IQ, Dual 2-Phase Synchronous Step-Down Controller
LTC3858EGN-1#PBF Linear

获取价格

 		LTC3858-1 - Low IQ, Dual 2-Phase Synchronous Step-Down Controller; Package: SSOP; Pins: 28
LTC3858EGN-1#TRPBF Linear

获取价格

 		LTC3858-1 - Low IQ, Dual 2-Phase Synchronous Step-Down Controller; Package: SSOP; Pins: 28
LTC3858EGN-1PBF Linear

获取价格

 		Low IQ, Dual 2-Phase Synchronous Step-Down Controller

与LTC3858相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证