MIC28516T-E/PHA Microchip

MIC28516 70V/8A Hyper Speed Control Synchronous DC/DC Buck Regulator with External Soft Start Features Applications Hyper Speed Control Architecture Enables: Distributed Power Systems Communications/Networking Infrastructure - High input to output voltage conversion ratio capability (V = 70V and V =0.6V) Industrial Power Supplies IN OUT - Small output capacitance Solar Energy 4.5V to 70V Input Voltage 8A Output Current Capability with Up to 95% General Description Efficiency The MIC28516 is an adjustable frequency, Adjustable Output Voltage from 0.6V to 32V synchronous buck regulator that features a unique 1% FB Accuracy adaptive on-time control architecture. It operates over Any Capacitor Stable: an input supply range of 4.5V to 70V and provides a - Zero-ESR to high-ESR output capacitors regulated output current of up to 8A. The output voltage is adjustable down to 0.6V, with an accuracy of 1%. 270 kHz to 800 kHz Adjustable Switching Frequency The Hyper Speed Control architecture allows for an Internal Compensation ultra-fast transient response, while reducing the output Built-In 5V Regulator for Single-Supply Operation capacitance, and also makes high-V /low-V IN OUT operation possible. This adaptive on-time control Auxiliary Bootstrap LDO for Improving System architecture combines the advantages of fixed Efficiency frequency operation and fast transient response in a Internal Bootstrap Diode single device. Adjustable Soft Start Time The MIC28516 offers a full suite of features that Programmable Current Limit ensures the protection of the Integrated Circuit (IC) Hiccup Mode Short-Circuit Protection during Fault conditions. These features include Thermal Shutdown Undervoltage Lockout (UVLO) to ensure proper Supports Safe Start-up Into a Pre-Biased Output operation under power sag conditions, soft start to Programmable Soft Start Time from 5 ms to reduce inrush current, Hiccup mode short-circuit 100 ms protection and thermal shutdown. -40C to +125C Junction Temperature Range Available in 32-Lead, 6 6 mm VQFN Package AEC-Q104 Qualified (Parts with VAO Suffix) Typical Application Circuit MIC28516 2.2 PV SV DD IN 4.7 F 1F 2.2 V IN PV V IN DD 8V to 70V 2.2 F 2.2 F 3 PG BST V 0.1 F IN EN 6.8 H V SS OUT SW 5V/8A 10 nF 2.21 k 25.0 k I LIM 47 F 2 4.7 nF 15 k 0.1 F 200 k FB V FREQ IN 2.05 k 100 k EXTVDD AGND PGND 2020-2021 Microchip Technology Inc. DS20006315C-page 1MIC28516 Package Type MIC28516 6 mm 6 mm 32-Lead VQFN 32 31 30 29 28 27 26 25 I 1 24 EN LIM 23 EXTVDD PGND 2 PGND 22 PGND SW 3 PV 21 BST 4 DD 20 SW PV 5 IN 19 PGND PV 6 IN 18 PGND PV 7 PV SW IN IN 17 PGND PV 8 IN 910 11 12 13 14 15 16 DS20006315C-page 2 2020-2021 Microchip Technology Inc. PV PG IN PV SV IN IN PV V IN DD SW PGND SW AGND SW FB SW SS PGND FREQ