9A Highly Integrated SupIRBuckTM Single‐Input Vo- l1ta-ge, Synchronous Buck Regulator
PD‐97661
IR3899
FEATURES
...
9A Highly Integrated SupIRBuckTM Single‐Input Vo- l1ta-ge, Synchronous Buck
Regulator
PD‐97661
IR3899
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
+/‐9A) 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: 4mm x 5mm PQFN Lead‐free, Halogen‐free and RoHS Compliant
BASIC APPLICATION
Figure 1: IR3899 Basic Application Circuit
DESCRIPTION
The IR3899 SupIRBuckTM is an easy‐to‐use, fully integrated and highly efficient DC/DC
regulator. The onboard PWM controller and MOSFETs make IR3899 a space‐efficient solution, providing accurate power delivery.
IR3899 is a versatile
regulator which offers programmable switching frequency and the ...