PD‐97746
16A Highly Integrated SupIRBuck
IR3895
Single‐Input Voltage, Synchronous Buck Regulator
- 1 -P
FEATURES
DESCRIPTION
The IR3895 SupIRBuckTM is an easy‐to‐use, fully
Single 5V to 21V application
integrated and highly efficient DC/DC regulator.
The onboard PWM controller and MOSFETs make
IR3895 a space‐efficient solution, providing accurate
power delivery.
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
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.
Enable input with Voltage Monitoring Capability
Thermally Compensated Current Limit with robust
The switching frequency is programmable from 300kHz
to 1.5MHz for an optimum solution.
hiccup mode over current protection
Smart internal LDO to improve light load and full load
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.
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
APPLICATIONS
Netcom Applications
±16A)
Integrated MOSFET drivers and Bootstrap Diode
Thermal Shut Down
Embedded Telecom Systems
Server Applications
Programmable Power Good Output with tracking
capability
Storage Applications
Monotonic Start‐Up
Distributed Point of Load Power Architectures
Operating temp: ‐40oC < Tj < 125oC
Small Size: 5mm x 6mm PQFN
Lead‐free, Halogen‐free and RoHS Compliant
BASIC APPLICATION
Figure 1: IR3895 Basic Application Circuit
Figure 2:IR3895 Efficiency
1
AUGUST 08, 2012 | DATA SHEET| Rev 3.1