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LTC3615 PDF预览

LTC3615

更新时间： 2024-02-10 08:54:18
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
32页 2949K
描述
Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter

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中文翻译

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LTC3615 技术参数

是否Rohs认证： 不符合生命周期：Active
包装说明：HVQCCN,Reach Compliance Code：not_compliant
风险等级：5.61其他特性：OUTPUT VOLTAGES DOWN TO 0.6V
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER控制模式：CURRENT-MODE
最大输入电压：5.5 V最小输入电压：2.25 V
标称输入电压：3.3 VJESD-30 代码：S-PQCC-N24
JESD-609代码：e0长度：4 mm
功能数量：1端子数量：24
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座面最大高度：0.8 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：4000 kHz技术：CMOS
温度等级：AUTOMOTIVE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：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LTC3615 数据手册

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LTC3615  
Dual 4MHz, 3A Synchronous  
Step-Down DC/DC Converter  
DescripTion  
FeaTures  
TheLTC®3615isadual3Asynchronousstep-downregula-  
torusingacurrentmode,constant-frequencyarchitecture.  
TheDCsupplycurrentisonly130µA(BurstModeoperation  
at no-load) while maintaining the output voltages, drop-  
ping to zero current in shutdown. The 2.25V to 5.5V input  
supply range makes the LTC3615 ideally suited for single  
Li-Ion applications. 100% duty cycle capability provides  
low dropout operation, which extends operating time in  
battery-operated systems.  
n
High Efficiency: Up to 94%  
n
Dual Outputs with 2 × 3A Output Current Capability  
Low Output Ripple Burst Mode® Operation:I = 130µA  
n
Q
n
2.25V to 5.5V Input Voltage Range  
n
1% Output Voltage Accuracy  
n
Output Voltages Down to 0.6V  
n
Programmable Slew Rate at Switch Pins  
n
Low Dropout Operation: 100% Duty Cycle  
n
Shutdown Current ≤1µA  
n
Adjustable Switching Frequency Up to 4MHz  
The operating frequency is externally programmable up to  
4MHz, allowing the use of small surface mount inductors.  
0°, 90°, or 180° of phase shift between the two channels  
can be selected to minimize input current ripple and  
output voltage ripple in a single 6A output configuration.  
ProgrammableslewratelimitingreducesEMI,andexternal  
synchronization can be applied up to 4MHz.  
n
Internal or External Compensation  
n
Selectable Pulse-Skipping/Forced Continuous/  
Burst Mode Operation with Adjustable Burst Clamp  
n
Optional Active Voltage Positioning (AVP) with  
Internal Compensation  
n
Selectable 0°/90°/180° Phase Shift Between Channels  
Fixed Internal and Programmable External Soft-Start  
n
n
n
n
The internal synchronous switches increase efficiency  
and eliminate the need for external catch diodes, saving  
external components and board space.  
Accurate Start-Up Tracking Capability  
DDR Memory Mode I = 1.5A  
OUT  
Availablein 4mm×4mm QFN-24andTSSOP-24Packages  
The LTC3615 is offered in leadless 24-pin 4mm × 4mm  
applicaTions  
QFN and thermally enhanced 24-pin TSSOP packages.  
n
Point-of-Load Supplies  
L, LT, LTC, LTM, Linear Technology, Burst Mode 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, 5994885, 6304066, 6498466, 6580258,  
6611131.  
n
Distributed Power Supplies  
n
Portable Computer Systems  
DDR Memory Termination  
n
n
Handheld Devices  
Efficiency and Power Loss vs Load Current  
Typical applicaTion  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
V
IN  
100µF  
SV  
IN  
RUN1  
PV  
IN1  
PV  
IN2  
SW1  
0.47µH  
0.47µH  
V
1
OUT1  
1.8V/3A  
TRACK/SS1  
PGOOD1  
ITH1  
47µF  
422k  
210k  
0.1  
LTC3615  
FB1  
SRLIM  
R /SYNC  
T
0.01  
0.001  
0.0001  
MODE  
V
OUT2  
2.5V/3A  
SW2  
PHASE  
47µF  
RUN2  
665k  
210k  
V
V
V
= 3.3V  
= 4V  
= 5V  
IN  
IN  
IN  
TRACK/SS2  
PGOOD2  
2.25MHz  
= 2.5V  
FB2  
V
OUT  
ITH2 SGND PGND  
0.001  
0.01  
0.1  
1
3615 TA01a  
OUTPUT CURRENT (A)  
3615 TA01b  
3615f  
ꢀ
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中文翻译

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