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LTC3728LCUH PDF预览

LTC3728LCUH

更新时间： 2024-09-24 22:31:27
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
32页 661K
描述
Dual, 550kHz, 2-Phase Synchronous Regulators

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中文翻译

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LTC3728LCUH 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC32,.2SQ,20
针数：32Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.05其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 4.8 V TO 5.2 V
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：30 V
最小输入电压：3.6 V标称输入电压：15 V
JESD-30 代码：S-PQCC-N32JESD-609代码：e0
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）：235
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：Tin/Lead (Sn/Pb)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：20宽度：5 mm
Base Number Matches：1

LTC3728LCUH 数据手册

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LTC3728L/LTC3728LX  
Dual, 550kHz, 2-Phase  
Synchronous Regulators  
U
FEATURES  
DESCRIPTIO  
The LTC®3728L/LTC3728LX are dual high performance  
step-down switching regulator controllers that drive all  
N-channel synchronous power MOSFET stages. A con-  
stant frequency current mode architecture allows phase-  
lockable frequency 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.  
■
Dual, 180° Phased Controllers Reduce Required  
Input Capacitance and Power Supply Induced Noise  
OPTI-LOOP® Compensation Minimizes COUT  
■
■
±1% Output Voltage Accuracy (LTC3728LC)  
Power Good Output Voltage Indicator  
■
■
Phase-Lockable Fixed Frequency 250kHz to 550kHz  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Wide VIN Range: 4.5V to 28V Operation  
OPTI-LOOP compensation allows the transient response  
tobeoptimizedoverawiderangeofoutputcapacitanceand  
ESRvalues. Theprecision0.8Vreferenceandpowergood  
output indicator are compatible with future microproces-  
sor generations, and a wide 4.5V to 28V (30V maximum)  
input supply range encompasses all battery chemistries.  
■
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  
Low Shutdown IQ: 20µA  
5V and 3.3V Standby Regulators  
3 Selectable Operating Modes: Constant Frequency,  
Burst Mode® Operation and PWM  
5mm × 5mm QFN and 28-Lead Narrow SSOP  
Packages  
■
■
■
■
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  
MOSFET until VOUT returns to normal. The FCB mode pin  
can select among Burst Mode, constant frequency mode  
and continuous inductor current mode or regulate a  
secondary winding. The LTC3728L/LTC3728LX include a  
power good output pin that indicates when both outputs  
are within 7.5% of their designed set point.  
■
U
APPLICATIO S  
■
Notebook and Palmtop Computers  
■
Telecom Systems  
■
Portable Instruments  
■
Battery-Operated Digital Devices  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.  
■
DC Power Distribution Systems  
U
TYPICAL APPLICATIO  
V
IN  
5.2V TO 28V  
C
IN  
1µF  
CERAMIC  
+
22µF  
4.7µF  
D3  
50V  
D4  
V
PGOOD INTV  
IN  
CC  
M2  
M1  
CERAMIC  
TG1  
TG2  
L1  
3.2µH  
L2  
3.2µH  
BOOST1  
SW1  
BOOST2  
SW2  
C
, 0.1µF  
C
B2  
, 0.1µF  
B1  
LTC3728L/  
LTC3728LX  
BG1  
BG2  
f
IN  
500kHz  
PLLIN  
PGND  
+
+
SENSE1  
SENSE2  
R
R
SENSE2  
SENSE1  
1000pF  
1000pF  
0.01Ω  
0.01Ω  
–
–
SENSE1  
V
SENSE2  
V
V
3.3V  
5A  
OSENSE1  
TH1  
OSENSE2  
V
OUT2  
OUT1  
5V  
5A  
R2  
R4  
63.4k  
1%  
I
I
TH2  
105k  
1%  
C
C
C2  
C1  
220pF  
C
47µF  
6V  
C
56µF  
6V  
RUN/SS1 SGND RUN/SS2  
OUT1  
OUT  
220pF  
R
C2  
+
+
R1  
20k  
1%  
R3  
20k  
1%  
R
C1  
C
C
SS1  
0.1µF  
SS2  
0.1µF  
15k  
15k  
SP  
SP  
M1, M2: FDS6982S  
3728 F01  
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter  
3728lxfa  
1
1234567...32

中文翻译

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LTC3728LCUH 替代型号

型号 品牌 替代类型 描述 数据表
LTC3728LIUH#PBF Linear

类似代替

 LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: QFN; Pins: 32; Te
LTC3728LIUH#TRPBF Linear

类似代替

 LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: QFN; Pins: 32; Te

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LTC3728LCUH#PBF Linear

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 		LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: QFN; Pins: 32; Te
LTC3728LCUH#TR Linear

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 		LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: QFN; Pins: 32; Te
LTC3728LCUHPBF Linear

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 		Dual, 550kHz, 2-Phase Synchronous Regulators
LTC3728LEGN Linear

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 		Dual, 550kHz, 2-Phase Synchronous Regulators
LTC3728LEGN#TR Linear

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 		LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: SSOP; Pins: 28; T
LTC3728LEGN-1 Linear

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 		LTC3728L-1 - Dual, 550kHz, 2-Phase Synchronous Regulator; Package: SSOP; Pins: 28; Tempera
LTC3728LEGN-1#TR Linear

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 		LTC3728L-1 - Dual, 550kHz, 2-Phase Synchronous Regulator; Package: SSOP; Pins: 28; Tempera
LTC3728LEGNPBF Linear

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 		Dual, 550kHz, 2-Phase Synchronous Regulators
LTC3728LEUH Linear

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 		Dual, 550kHz, 2-Phase Synchronous Regulators
LTC3728LEUH#TR Linear

获取价格

 		LTC3728L and LX - Dual, 550kHz, 2-Phase Synchronous Regulators; Package: QFN; Pins: 32; Te

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