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IR3897M PDF预览

IR3897M

更新时间: 2024-11-21 01:21:31
品牌 Logo 应用领域
英飞凌 - INFINEON /
页数 文件大小 规格书
47页 2658K
描述
Single‐Input Voltage, Synchronous Buck Regulator

IR3897M 数据手册

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PD
97663  
4A Highly Integrated SupIRBuckTM  
IR3897  
SingleInput Voltage, Synchronous Buck Regulator  
FEATURES  
DESCRIPTION  
integrated and highly efficient DC/DC regulator.  
The onboard PWM controller and MOSFETs make  
IR3897 a spaceefficient solution, providing accurate  
power delivery.  
The IR3897 SupIRBuckTM is an easytouse, fully  
Single 5V to 21V application  
Wide Input Voltage Range from 1.0V to 21V with  
external Vcc  
Output Voltage Range: 0.5V to 0.86× Vin  
Enhanced Line/Load Regulation with FeedForward  
Programmable Switching Frequency up to 1.5MHz  
Internal Digital SoftStart/SoftStop  
IR3897 is a versatile regulator which offers  
programmability of switching frequency and internal  
current limit while operates in wide input and output  
voltage range.  
Enable input with Voltage Monitoring Capability  
The switching frequency is programmable from 300kHz  
to 1.5MHz for an optimum solution.  
Thermally Compensated Current Limit with robust  
hiccup mode over current protection  
Smart Internal LDO to improve light load and full load  
It also features important protection functions, such as  
PreBias startup, thermally compensated current limit,  
over voltage protection and thermal shutdown to give  
required system level security in the event of fault  
conditions.  
efficiency  
External Synchronization with Smooth Clocking  
Enhanced PreBias StartUp  
Precision Reference Voltage (0.5V+/0.5%) with  
margining capability  
Vp for Tracking Applications (Source/Sink Capability  
+/4A)  
APPLICATIONS  
Netcom Applications  
Integrated MOSFET drivers and Bootstrap Diode  
Thermal Shut Down  
Embedded Telecom Systems  
Server Applications  
Programmable Power Good Output with tracking  
Storage Applications  
capability  
Distributed Point of Load Power Architectures  
Monotonic StartUp  
Operating temp: 40oC < Tj < 125oC  
Small Size: 4mm x 5mm PQFN  
Leadfree, Halogenfree and RoHS Compliant  
BASIC APPLICATION  
97  
95  
93  
91  
89  
87  
85  
83  
81  
79  
77  
12Vin,Internal bias,Frequency 600KHz  
2.4 2.8 3.2 3.6 4  
75  
73  
0.4  
0.8  
1.2  
1.6  
2
Load Current (A)  
1.2Vout  
3.3Vout  
Figure 2:IR3897 Efficiency  
Figure 1: IR3897 Basic Application Circuit  
1
June 24, 2014 |DATA SHEET | Rev 3.6  

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