MIC24053YJL TR Microchip

MIC24053 12V, 9A High-Efficiency Buck Regulator with Hyper Speed Control Features General Description Hyper Speed Control Architecture Enables: The MIC24053 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time - High Delta V Operation (V = 19V and V IN OUT control architecture. The MIC24053 operates over an = 0.8V) input supply range of 4.5V to 19V and provides a - Small Output Capacitance regulated output of up to 9A of output current. The 4.5V to 19V Voltage Input output voltage is adjustable down to 0.8V with a 9A 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 The Hyper Speed Control architecture allows for 1% Feedback Accuracy ultra-fast transient response while reducing the output Any Capacitor Stable-Zero-to-High ESR capacitance and also makes (High V )/(Low V ) IN OUT operation possible. This adaptive t ripple control 600 kHz Switching Frequency ON 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 MIC24053 offers a full suite of features to ensure Short-Circuit Protection protection of the IC during fault conditions. These Supports Safe Startup into a Pre-Biased Load include undervoltage lockout to ensure proper 40C to +125C Junction Temperature Range operation under power-sag conditions, internal Available in 28-pin 5 mm x 6 mm QFN Package soft-start to reduce inrush current, foldback current limit, hiccup mode short-circuit protection, and Applications thermal shutdown. An open-drain Power Good (PG) Servers, Workstations pin is provided. pin is provided. Routers, Switches, and Telecom Equipment Base Stations Typical Application Circuit MIC24053 5x6 QFN MIC24053 VDD BST PVDD 2.2F 0.1F SGND 10k 2.2H V OUT SW PG PG 1.8V/9A CS 0.1F VIN V IN 100Fx2 PVIN 2.49k 4.5V to 19V 19.6k 4.7nF 4.7F x2 PGND FB 10k 2.00k EN EN 2015 Microchip Technology Inc. DS20005668A-page 1MIC24053 Package Type MIC24053 5x6 QFN Top View 28 27 26 25 24 23 PVDD 1 22 CS 21 PGND PGND 2 PGND NC 3 20 BST 4 SW 19 PVIN PGND PVIN 5 18 PGND 17 PVIN 6 PVIN SW PGND 7 16 PVIN PGND 8 15 PVIN 9 10 11 12 13 14 Functional Block Diagram MIC24053 VDD VIN LDO PVDD FIXED T ON 2.2F ESTIMATE VDD PVIN VIN 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 VOUT TIMER 1.8V/9A CS SOFT-START CL AND ZC DETECTION R1 0.1F 4.7nF 100Fx2 2.49k SOFT THERMAL START PVDD SHUTDOWN 19.6k SGND LSD INTERNAL PGND RIPPLE INJECTION VDD COMPENSATION 10k gm EA FB COMP PG R2 2.00k V 8% REF 0.8V 92% DS20005668A-page 2 2015 Microchip Technology Inc. SW VDD SW VIN SW EN SW PG PVIN FB PVIN SGND