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LTC3890EGN-3#PBF

更新时间： 2024-11-24 19:53:11
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管输出元件
页数 文件大小 规格书
40页 1263K
描述
LTC3890-3 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller; Package: SSOP; Pins: 28; Temperature Range: -40°C to 85°C

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LTC3890EGN-3#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP28,.25
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：4.42其他特性：OUTPUT VOLTAGE RANGE FROM 0.8 VOLT TO 24 VOLT
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：60 V
最小输入电压：4 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G28JESD-609代码：e3
长度：9.893 mm湿度敏感等级：1
功能数量：1端子数量：28
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP28,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：900 kHz
技术：CMOS温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.635 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.899 mm
Base Number Matches：1

LTC3890EGN-3#PBF 数据手册

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LTC3890-3  
60V Low I , Dual, 2-Phase  
Q
Synchronous Step-Down  
DC/DC Controller  
DescripTion  
FeaTures  
The LTC®3890-3 is a high performance dual step-down  
switching regulator DC/DC controller that drives all  
N-channelsynchronouspowerMOSFETstages.Aconstant  
frequency current mode architecture allows a phase-  
lockablefrequencyofupto850kHz.Powerlossandsupply  
noiseareminimizedbyoperatingthetwocontrolleroutput  
stages out-of-phase.  
n
Wide V Range: 4V to 60V (65V Abs Max)  
IN  
n
Low Operating I : 50µA (One Channel On)  
Q
n
n
n
Wide Output Voltage Range: 0.8V ≤ V  
≤ 24V  
OUT  
R
or DCR Current Sensing  
SENSE  
Out-of-Phase Controllers Reduce Input Capacitance  
and Power Supply Induced Noise  
n
n
n
Phase-Lockable Frequency (75kHz to 850kHz)  
Programmable Fixed Frequency (50kHz to 900kHz)  
Selectable Continuous, Pulse-Skipping or Low Ripple  
Burst Mode® Operation at Light Loads  
The50μAno-loadquiescentcurrentextendsoperatinglife  
in battery-powered systems. OPTI-LOOP® compensation  
allows the transient response to be optimized over a wide  
range of output capacitance and ESR values. A wide 4V  
to 60V input supply range encompasses a wide range of  
intermediate bus voltages and battery chemistries.  
n
n
n
n
n
n
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Power Good Output Voltage Monitor  
Low Shutdown I : <14µA  
Q
Independent TRACK/SS pins for each controller ramp the  
outputvoltagesduringstart-up.Currentmodecontrollimits  
the inductor current during short-circuit conditions. The  
PLLIN/MODE pin selects among Burst Mode operation,  
pulse-skipping mode, or continuous conduction mode at  
light loads.  
Internal LDO Powers Gate Drive from V or EXTV  
Narrow SSOP Package  
IN  
CC  
applicaTions  
n
Automotive Always-On Systems  
n
Battery Operated Digital Devices  
n
For versions with different and/or additional features, see  
theLTC3890familysummary, Table1, inthePinFunctions  
section of this data sheet.  
Distributed DC Power Systems  
L, LT, LTC, LTM, Linear Technology, Burst Mode, OPTI-LOOP, PolyPhase and the Linear logo  
are registered trademarks of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents including 5481178, 5705919,  
5929620, 6100678, 6144194, 6177787, 6304066, 6580258, 7230497.  
Typical applicaTion  
High Efficiency Dual 8.5V/3.3V Output Step-Down Converter  
Efficiency and Power Loss  
vs Output Current  
V
IN  
9V TO 60V  
10000  
1000  
100  
100  
90  
80  
70  
60  
50  
40  
30  
20  
22µF  
V
V
= 12V  
IN  
OUT  
4.7µF  
= 3.3V  
V
INTV  
CC  
IN  
TG1  
TG2  
0.1µF  
0.1µF  
BOOST1  
SW1  
BOOST2  
SW2  
4.7µH  
8µH  
BG1  
BG2  
LTC3890-3  
10  
PGND  
+
+
SENSE1  
SENSE2  
1
0.01Ω  
100k  
0.008Ω  
10  
0
–
–
V
8.5V  
3A  
SENSE2  
OUT2  
SENSE1  
V
OUT1  
3.3V  
5A  
0.1  
10  
V
FB1  
V
FB2  
0.0001 0.001  
0.01  
0.1  
1
100k  
470µF  
ITH1  
ITH2  
OUTPUT CURRENT (A)  
1000pF  
34.8k  
1000pF  
330µF  
TRACK/SS1 SGND TRACK/SS2  
0.1µF  
38903 TA01b  
10.5k  
31.6k  
34.8k  
0.1µF  
38903 TA01a  
38903f  
1
For more information www.linear.com/3890-3  
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中文翻译

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LTC3890EGN-3#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3890MPGN-3#PBF Linear

完全替代

 LTC3890-3 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller; Package: SSO

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