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LTC3890EUH-2#PBF

更新时间： 2024-11-24 19:48:19
品牌 Logo 应用领域
凌特 - Linear 开关输出元件
页数 文件大小 规格书
40页 430K
描述
LTC3890-2 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller; Package: QFN; Pins: 32; Temperature Range: -40°C to 85°C

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LTC3890EUH-2#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC32,.2SQ,20
针数：32Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：8.43其他特性：OUTPUT VOLTAGE = 0.8V TO 24V
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：S-PQCC-N32JESD-609代码：e3
长度：5 mm湿度敏感等级：1
功能数量：1端子数量：32
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：HVQCCN
封装等效代码：LCC32,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：0.8 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：850 kHz
技术：CMOS温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：5 mm
Base Number Matches：1

LTC3890EUH-2#PBF 数据手册

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LTC3890-2  
60V Low I , Dual, 2-Phase  
Q
Synchronous Step-Down  
DC/DC Controller  
DESCRIPTION  
FEATURES  
The LTC®3890-2 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-  
lockable frequency of up to 850kHz. Power loss and noise  
due to the ESR of the input capacitor are minimized by  
operating the two controller output 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  
The50ꢀAno-loadquiescentcurrentextendsoperatingrun  
timeinbattery-poweredsystems.OPTI-LOOP® compensa-  
tion 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
n
Selectable Current Limit  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Power Good Output Voltage Monitors  
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. For versions with different and/or additional  
features, see the LTC3890 family summary, Table 1, in the  
Pin Functions section of this data sheet.  
Low Shutdown I : < 14μA  
Q
Internal LDO Powers Gate Drive from V or EXTV  
IN  
CC  
Small Low Profile (0.75mm) 5mm × 5mm QFN Package  
APPLICATIONS  
n
Automotive Always-On Systems  
n
Battery Operated Digital Devices  
n
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  
V
vs Output Current  
IN  
9V TO 60V  
22μF  
10000  
1000  
100  
100  
90  
80  
70  
60  
50  
40  
30  
20  
4.7μF  
V
V
= 12V  
IN  
OUT  
V
IN  
INTV  
CC  
= 3.3V  
TG1  
TG2  
0.1μF  
0.1μF  
BOOST1  
SW1  
BOOST2  
SW2  
4.7μH  
8μH  
BG1  
BG2  
LTC3890-2  
PGND  
10  
+
+
SENSE1  
SENSE1  
SENSE2  
0.01Ω  
100k  
0.008Ω  
1
–
–
V
SENSE2  
10  
0
OUT2  
V
OUT1  
3.3V  
5A  
8.5V  
3A  
V
V
FB2  
FB1  
0.1  
10  
100k  
ITH1  
ITH2  
0.0001 0.001  
0.01  
0.1  
1
470μF  
1000pF  
34.8k  
1000pF  
OUTPUT CURRENT (A)  
330μF  
TRACK/SS1 SGND TRACK/SS2  
0.1μF  
10.5k  
38902 TA01b  
31.6k  
34.8k  
0.1μF  
38902 TA01a  
38902f  
1
1234567...40

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