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LTC3728EUH#PBF

更新时间： 2024-09-25 19:53:03
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
36页 1654K
描述
LTC3728 - Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator; Package: QFN; Pins: 32; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3728EUH#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：2.76其他特性：ALSO OPERATES AT 5V
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：36 V
最小输入电压：3.5 V标称输入电压：15 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：85 °C最低工作温度：
最大输出电流：3 A标称输出电压：3.35 V
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）：260
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：PHASE-SHIFT最大切换频率：590 kHz
技术：CMOS温度等级：OTHER
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：30宽度：5 mm
Base Number Matches：1

LTC3728EUH#PBF 数据手册

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LTC3728  
Dual, 550kHz, 2-Phase  
Synchronous Step-Down  
Switching Regulator  
DESCRIPTION  
FEATURES  
The LTC®3728 is a dual high performance step-down  
switching regulator controller that drives all N-channel  
synchronouspowerMOSFETstages.Aconstant-frequency  
currentmodearchitectureallowsphase-lockablefrequency  
of up to 550kHz. Power loss and noise due to the ESR of  
the input capacitors are minimized by operating the two  
controller output stages out of phase.  
n
Dual, 180° Phased Controllers Reduce Required  
Input Capacitance and Power Supply Induced Noise  
OPTI-LOOP® Compensation Minimizes C  
n
OUT  
n
1ꢀ Output Voltage Accuracy  
n
Power Good Output Voltage Indicator  
n
Phase-Lockable Fixed Frequency 250kHz to 550kHz  
n
Dual N-Channel MOSFET Synchronous Drive  
n
Wide V Range: 3.5V to 36V Operation  
IN  
OPTI-LOOPcompensationallowsthetransientresponseto  
be optimized over a wide range of output capacitance and  
ESR values. The precision 0.8V reference and power good  
outputindicatorarecompatiblewithfuturemicroprocessor  
generations,andawide3.5Vto30V(36Vmaximum)input  
supply range encompasses all battery chemistries.  
n
n
n
n
n
n
n
n
n
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Soft-Start Current Ramping  
Foldback Output Current Limiting  
Latched Short-Circuit Shutdown with Defeat Option  
Output Overvoltage Protection  
Remote Output Voltage Sense  
A RUN/SS pin for each controller provides both soft-  
start and optional timed, short-circuit shutdown. Current  
foldback limits MOSFET dissipation during short-circuit  
conditions when overcurrent latchoff is disabled. Output  
overvoltage protection circuitry latches on the bottom  
Low Shutdown I : 20μA  
Q
5V and 3.3V Regulators  
3 Selectable Operating Modes: Constant-Frequency,  
Burst Mode® Operation and PWM  
Available in 32-Pin 5mm × 5mm QFN and  
28-Pin SSOP Packages  
n
MOSFET until V  
returns to normal. The FCB mode  
OUT  
pin can select among Burst Mode, constant-frequency  
mode and continuous inductor current mode or regulate  
asecondarywinding. TheLTC3728includesapowergood  
output pin that indicates when both outputs are within  
7.5% of their designed set point.  
APPLICATIONS  
n
Notebook and Palmtop Computers  
n
Telecom Systems  
n
Portable Instruments  
n
Battery-Operated Digital Devices  
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and OPTI-LOOP are  
registered trademarks of Linear Technology Corporation. All other trademarks are the property  
of their respective owners. Protected by U.S. Patents including 5481178, 5929620, 6177787,  
6144194, 6100678, 5408150, 6580258, 5705919.  
n
DC Power Distribution Systems  
V
TYPICAL APPLICATION  
IN  
5.2V TO 28V  
+
C
IN  
4.7μF  
1μF  
22μF  
D3  
V
PGOOD INTV  
D4  
IN  
CC  
M1  
M2  
50V  
TG1  
TG2  
L1  
3.2μH  
L2  
3.2μH  
BOOST1  
SW1  
BOOST2  
SW2  
C
, 0.1μF  
B2  
C
B1  
, 0.1μF  
LTC3728  
BG1  
BG2  
f
IN  
500kHz  
PLLIN  
PGND  
+
+
SENSE1  
SENSE2  
R
R
SENSE2  
SENSE1  
1000pF  
1000pF  
0.01Ω  
0.01Ω  
–
–
SENSE1  
V
I
SENSE2  
V
V
3.3V  
5A  
V
OUT2  
OUT1  
5V  
5A  
OSENSE1  
TH1  
RUN/SS1 SGND RUN/SS2  
OSENSE2  
R2  
105k  
1%  
R4  
63.4k  
1%  
I
TH2  
C
C
C
56μF  
6V  
C
47μF  
6V  
C1  
220pF  
C2  
220pF  
OUT  
OUT1  
+
+
R1  
20k  
1%  
R3  
20k  
1%  
R
C
C
C1  
SS1  
0.1μF  
SS2  
0.1μF  
R
C2  
15k  
15k  
SP  
SP  
M1, M2: FDS6982S  
3728 F01  
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter  
3728fg  
1
1234567...36

中文翻译

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LTC3728EUH#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3728EUH Linear

完全替代

 Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator
LTC3728EUH#TRPBF Linear

类似代替

 LTC3728 - Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator; Package: QFN; P

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