IR3895
IR3895 is Synchronous Buck Regulator manufactured by International Rectifier.
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 pensated 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: ‐40o C < Tj < 125o C
- Small Size: 5mm x 6mm PQFN
- Lead‐free, Halogen‐free and Ro HS pliant
DESCRIPTION
The IR3895 Sup IRBuck TM 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 300k Hz to 1.5MHz for an optimum solution.
It also features
important protection functions, such as Pre‐Bias startup, thermally pensated current limit, over voltage protection and thermal shutdown to give required system level security in the event of fault conditions.
APPLICATIONS
- Net Applications
- Embedded Tele 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|...
