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LT3412AEFE

更新时间： 2024-01-09 19:01:23
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
20页 250K
描述
Switching Regulator, Current-mode, 3A, 4kHz Switching Freq-Max, PDSO16

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LT3412AEFE 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Transferred零件包装代码：TSSOP
包装说明：HTSSOP,针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.15
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION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 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e0
长度：5 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：3 A封装主体材料：PLASTIC/EPOXY
封装代码：HTSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：255
认证状态：Not Qualified座面最大高度：1.1 mm
表面贴装：YES切换器配置：BUCK-BOOST
最大切换频率：4 kHz温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40宽度：4.5 mm
Base Number Matches：1

LT3412AEFE 数据手册

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LTC3412A  
3A, 4MHz, Monolithic  
Synchronous Step-Down Regulator  
U
DESCRIPTIO  
FEATURES  
The LTC®3412A is a high efficiency monolithic synchro-  
nous, step-down DC/DC converter utilizing a constant  
frequency, current mode architecture. It operates from an  
input voltage range of 2.25V to 5.5V and provides a  
regulated output voltage from 0.8V to 5V while delivering  
up to 3A of output current. The internal synchronous  
power switch with 77mΩ on-resistance increases effi-  
ciency and eliminates the need for an external Schottky  
diode. Switchingfrequencyissetbyanexternalresistoror  
can be synchronized to an external clock. 100% duty cycle  
provides low dropout operation extending battery life in  
portable systems. OPTI-LOOP® compensation allows the  
transient response to be optimized over a wide range of  
loads and output capacitors.  
■
High Efficiency: Up to 95%  
3A Output Current  
■
■
Low Quiescent Current: 64μA  
■
Low RDS(ON) Internal Switch: 77mΩ  
■
2.25V to 5.5V Input Voltage Range  
■
Programmable Frequency: 300KHz to 4MHz  
2% Output Voltage Accuracy  
0.8V Reference Allows Low Output Voltage  
Selectable Forced Continuous/Burst Mode®operation  
with Adjustable Burst Clamp  
■
■
■
■
■
■
■
■
Synchronizable Switching Frequency  
Low Dropout Operation: 100% Duty Cycle  
Power Good Output Voltage Monitor  
Overtemperature Protected  
Available in 16-Lead Exposed Pad TSSOP and QFN  
Packages  
The LTC3412A can be configured for either Burst Mode  
operationorforcedcontinuousoperation.Forcedcontinu-  
ous operation reduces noise and RF interference while  
Burst Mode operation provides high efficiency by reduc-  
ing gate charge losses at light loads. In Burst Mode  
operation, external control of the burst clamp level allows  
the output voltage ripple to be adjusted according to the  
application requirements.  
U
APPLICATIO S  
■
Point-of-Load Regulation  
Notebook Computers  
Portable Instruments  
Distributed Power Systems  
■
■
■
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
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, 6580258, 6304066, 6127815, 6498466,  
6611131, 6724174.  
U
TYPICAL APPLICATIO  
22μF  
Efficiency and Power Loss  
V
IN  
3.3V  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
100000  
10000  
1000  
100  
PV SV  
IN  
EFFICIENCY  
IN  
RT  
2.2M  
PGOOD  
LTC3412A  
0.47μH  
294k  
V
OUT  
SW  
2.5V AT 3A  
C
OUT  
RUN/SS  
PGND  
100μF  
×2  
12.1k  
1000pF  
I
SGND  
V
FB  
TH  
SYNC/MODE  
POWER LOSS  
820pF  
10  
69.8k  
392k  
115k  
3412A F01a  
1
0.01  
0.1  
1
10  
LOAD CURRENT (A)  
Figure 1. 2.5V/3A Step-Down Regulator  
3412afb  
1
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