MIC24051YJL TR

MIC24051 12V, 6A High-Efficiency Buck Regulator with Hyper Speed Control Features General Description Hyper Speed Control Architecture Enables: The MIC24051 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time = 19V and V - High Delta V Operation (V IN OUT control architecture. The MIC24051 operates over an = 0.8V) input supply range of 4.5V to 19V and provides a - Small Output Capacitance regulated output of up to 6A of output current. The 4.5V to 19V Voltage Input output voltage is adjustable down to 0.8V with a 6A Output Current Capability, up to 95% guaranteed accuracy of 1%, and the device operates Efficiency at a switching frequency of 600 kHz. Adjustable Output from 0.8V to 5.5V Microchips Hyper Speed Control architecture allows 1% Feedback Accuracy for ultra-fast transient response while reducing the Any Capacitor Stable - Zero-to-High ESR output capacitance and also makes (High V )/(Low IN 600 kHz Switching Frequency V ) operation possible. This adaptive t ripple OUT ON control architecture combines the advantages of No External Compensation fixed-frequency operation and fast transient response Power Good (PG) Output in a single device. Foldback Current-Limit and Hiccup Mode The MIC24051 offers a full suite of protection features Short-Circuit Protection to ensure protection of the IC during fault conditions. Supports Safe Start-Up into a Pre-Biased Load These include undervoltage lockout to ensure proper 40C to +125C Junction Temperature Range operation under power-sag conditions, internal Available in a 28-pin 5 mm x 6 mm QFN Package soft-start to reduce inrush current, foldback current limit, hiccup mode short-circuit protection and thermal Applications shutdown. An open-drain Power Good (PG) pin is Servers and Workstations provided. Routers, Switches, and Telecom Equipment part, MIC24052, is also The 6A HyperLight Load Base Stations available on Microchips web site. Typical Application Schematic MIC24051 28-PIN QFN MIC24051 VDD 2.2F BST PVDD 0.1F SGND 10k 2.2H V OUT SW PG PG 1.8V/6A CS 0.1F VIN V 4.7nF IN PVIN 4.5V TO 19V 100F 4.7F 19.6k 2.49k x2 PGND FB 10k 2.00k EN EN 2016 Microchip Technology Inc. DS20005658A-page 1MIC24051 Package Type MIC24051 28-Pin QFN (JL) (Top View) 28 27 26 25 24 23 PVDD 1 22 CS 2 21 PGND PGND PGND NC 3 20 BST 4 SW 19 PVIN PGND 5 18 PVIN PGND 17 PVIN 6 SW PVIN PGND 7 16 PVIN PGND 8 15 PVIN 9 10 11 12 13 14 Block Diagram D1 MIC24051 VDD VIN LDO PVDD FIXED T ON 2.2F ESTIMATE VDD PVIN V IN 4.5V to 19V MODIFIED V BST IN 4.7F UVLO T OFF x2 0.1F 10k HSD C BST CONTROL 2.2H EN LOGIC SW V OUT TIMER 1.8V/6A CS SOFT-START CL and ZC DETECTION R1 0.1F 4.7nF 100F 2.49k SOFT THERMAL PVDD START 19.6k SHUTDOWN SGND LSD INTERNAL PGND RIPPLE INJECTION VDD COMPENSATION g EA 10k m FB COMP PG R2 2.00k V 8% REF 0.8V 92% DS20005658A-page 2 2016 Microchip Technology Inc. SW VDD SW VIN SW EN SW PG PVIN FB SGND PVIN