MIC24052 12V, 6A High-Efficiency Buck Regulator with HyperLight Load Features General Description HyperLight Load Efficiency: up to 80% at 10 mA The MIC24052 is a constant-frequency, synchronous DC/DC buck regulator featuring a unique adaptive Architecture Enables: Hyper Speed Control on-time control architecture. The MIC24052 operates - High Delta V Operation (V = 19V and V IN OUT over an input supply range of 4.5V to 19V. It has an = 0.8V) internal linear regulator which provides a regulated 5V - Small Output Capacitance to power the internal control circuitry. The MIC24052 4.5V to 19V Input Voltage Range operates at a constant 600 kHz switching frequency in 6A Output Current Capability continuous-conduction mode and can be used to provide up to 6A of output current. The output voltage Up to 95% Efficiency is adjustable down to 0.8V. Adjustable Output from 0.8V to 5.5V Microchips HyperLight Load architecture provides 1% Feedback Accuracy the same high-efficiency and ultra-fast transient Any Capacitor Stable - Zero-to-High ESR architecture response as the Hyper Speed Control 600 kHz Switching Frequency under medium to heavy loads, but also maintains high Power Good (PG) Output efficiency under light load conditions by transitioning to Foldback Current-Limit and Hiccup Mode variable-frequency, discontinuous-mode operation. Short-Circuit Protection The MIC24052 offers a full suite of protection features Supports Safe Start-Up into a Pre-Biased Load to ensure protection of the IC during fault conditions. 40C to +125C Junction Temperature Range These include undervoltage lockout to ensure proper Available in a 28-pin 5 mm x 6 mm QFN Package operation under power-sag conditions, thermal shutdown, internal soft-start to reduce the inrush Applications current, foldback current limit and hiccup mode Servers and Workstations short-circuit protection. The MIC24052 includes a power good (PG) output to allow simple sequencing. Routers, Switches, and Telecom Equipment Base Stations The 6A Hyper Speed Control part, MIC24051, is also available on Microchips web site. Typical Application Schematic MIC24052 28-PIN QFN MIC24052 VDD 2.2F BST PVDD 0.1F SGND 10k 2.2H V OUT SW PG 1.8V/6A PG 0.1F CS 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. DS20005659A-page 1MIC24052 Package Type MIC24052 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 PVIN 5 18 PGND 6 17 PVIN SW PVIN PGND 7 16 PVIN PGND 8 15 PVIN 9 10 11 12 13 14 Block Diagram D1 MIC24052 VDD VIN LDO PVDD FIXED T ON 2.2F ESTIMATE VDD PVIN V IN 4.5V to 19V MODIFIED V IN BST 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 START PVDD SHUTDOWN 19.6k SGND LSD INTERNAL PGND RIPPLE INJECTION VDD COMPENSATION g EA 10k m FB COMP PG R2 2.00k V REF 8% 0.8V 92% DS20005659A-page 2 2016 Microchip Technology Inc. SW VDD SW VIN SW EN SW PG PVIN FB SGND PVIN