TM 6A Highly Integrated SupIRBuck Single- IR3827 Input Voltage, Synchronous Buck Regulator FEATURES DESCRIPTION TM Single input voltage range from 5V to 21V The IR3827 SupIRBuck is an easy-to-use, fully integrated and highly efficient DC/DC regulator. Wide input voltage range from 1.0V to 21V with The onboard PWM controller and MOSFETs make external V bias voltage CC IR3827 a space-efficient solution, providing accurate Output voltage range from 0.6V to 0.86% PVin power delivery for low output voltage applications. Enhanced line/load regulation with feedforward IR3827 is a versatile regulator which offers Programmable switching frequency up to programmable switching frequency and internally set 1.2MHz current limit while operating in wide range of input and Three user selectable soft-start time output voltage conditions. User selectable LDO output voltage The switching frequency is programmable from 300kHz Enable input with voltage monitoring capability to 1.2MHz for an optimum solution. It also features important protection functions, such as Pre-Bias Thermally compensated current limit with robust startup, thermally compensated current limit, over hiccup mode over current protection voltage protection and thermal shutdown to give Synchronization to an external clock required system level security in the event of fault Enhanced Pre-bias start-up conditions. Precise reference voltage (0.6V+/-0.6%) APPLICATIONS Open-drain PGood indication Optional power up sequencing Computing Applications Integrated MOSFET drivers and bootstrap diode Set Top Box Applications Thermal Shut Down Storage Applications Monotonic Start-Up Data Center Applications Operating temp: -40C < T < 125C j Distributed Point of Load Power Architectures Package size: 4mm x 5mm PQFN Lead-free, Halogen-free and RoHS6 Compliant ORDERING INFORMATION Standard Pack Base Part Number Package Type Orderable Part Number Form Quantity IR3827 PQFN 4 mm x 5 mm Tape and Reel 750 IR3827MTR1PBF IR3827 PQFN 4 mm x 5 mm Tape and Reel 4000 IR3827MTRPBF IR3827 PBF Lead Free TR/TR1 Tape and Reel M PQFN Package 1 www.irf.com 2013 International Rectifier July 18, 2013 IR3827 BASIC APPLICATION Vin Vin PVin SS Select Boot Vcc/ Vo LDO out SW IR3827 PGood PGood Seq Fb Enable Comp Rt/Sync LDO Select Gnd PGnd Figure 1 IR3827 Basic Application Circuit Figure 2 IR3827 Efficiency PINOUT DIAGRAM IR3827 SW PVin 13 12 PGnd 11 Boot Vcc/LDO Out 14 10 GND 9 Enable 15 Vin 17 16 8 LDO Select Seq 1 2 3 4 5 6 7 Figure 3 4mm x 5mm PQFN (Top View) 2 www.irf.com 2013 International Rectifier July 18, 2013 Fb N/C Comp Gnd Rt/Sync SS Select PGood