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IR3895MTR1PBF

- 1 -P 16A Highly Integrated SupIRBuck Single‐Input Voltage, Synchronous Buck Regulator

International Rectifier 

16A Highly Integrated SupIRBuck

Single‐Input V-o1lt-aPge, Synchronous Buck Regulator

PD‐97746

IR3895

FEATURES

 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 Feed‐Forward

 Programmable Switching Frequency up to 1.5MHz

 Internal Digital Soft‐Start/Soft‐Stop

 Enable input with Voltage Monitoring Capability

 Thermally Compensated Current Limit with robust

hiccup mode over current protection

 Smart internal LDO to improve light load and full load

efficiency

 External Synchronization with Smooth Clocking

 Enhanced Pre‐Bias Start‐Up

 Precision Reference Voltage (0.5V+/‐0.5%) with

margining capability

 Vp for Tracking Applications (source/sink capability

±16A)

 Integrated MOSFET drivers and Bootstrap Diode

 Thermal Shut Down

 Programmable Power Good Output with tracking

capability

 Monotonic Start‐Up

 Operating temp: ‐40oC < Tj < 125oC

 Small Size: 5mm x 6mm PQFN

 Lead‐free, Halogen‐free and RoHS Compliant

DESCRIPTION

The IR3895 SupIRBuckTM is an easy‐to‐use, fully

integrated and highly efficient DC/DC regulator.

The onboard PWM controller and MOSFETs make

IR3895 a space‐efficient solution, providing accurate

power delivery.

IR3895 is a versatile regulator which offers

programmable of switching frequency and the fixed

internal current limit while operates in wide input and

output voltage range.

The switching frequency is programmable from 300kHz

to 1.5MHz for an optimum solution.

It also features important protection functions, such as

Pre‐Bias startup, thermally compensated current limit,

over voltage protection and thermal shutdown to give

required system level security in the event of fault

conditions.

APPLICATIONS

 Netcom Applications

 Embedded Telecom Systems

 Server Applications

 Storage Applications

 Distributed Point of Load Power Architectures

BASIC APPLICATION

Figure 1: IR3895 Basic Application Circuit

1 JANUARY 18, 2013 | DATA SHEET| Rev 3.4

Figure 2:IR3895 Efficiency

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