MIC2101/02 38V Synchronous Buck Controllers Featuring Adaptive ON-Time Control Features General Description Hyper Speed Control Architecture Enables: The MIC2101/2 are constant-frequency, synchronous buck controllers that feature a unique adaptive ON-time - High Delta V Operation control architecture. The MIC2101/2 operates over an (V = 38V and V = 1.2V) IN OUT input supply range from 4.5V to 38V and can be used - Any Capacitor Stable to supply up to 15A of output current. The output 4.5V to 38V Input Voltage voltage is adjustable down to 0.8V with a guaranteed Adjustable Output Voltage from 0.8V to 24V (Also accuracy of 1%. The device operates with Limited by Duty Cycle) programmable switching frequency from 200 kHz to 200 kHz to 600 kHz Programmable Switching 600 kHz. Frequency architecture provides the same The HyperLight Load HyperLight Load Control (MIC2101 Only) high-efficiency and ultra-fast transient response as the (MIC2102 Only) Hyper Speed Control Hyper Speed Control architecture under medium to heavy loads, but also maintains high efficiency under Enable Input, Power-Good Output light load conditions by transitioning to variable Built-In 5V Regulator for Single-Supply Operation frequency, discontinuous-mode operation. Programmable Current-Limit and Fold-Back Hiccup Mode Short-Circuit Protection The MIC2101/2 offers a full suite of protection features to ensure protection of the IC during fault conditions. 5 ms Internal Soft-Start, Internal Compensation, These include undervoltage lockout to ensure proper and Thermal Shutdown operation under power-sag conditions, internal Supports Safe Start-Up into a Pre-Biased Output soft-start to reduce inrush current, fold-back 40C to +125C Junction Temperature Range current-limit, hiccup mode short-circuit protection, Available in 16-Pin 3 mm x 3 mm QFN Package and thermal shutdown. Applications Distributed Power Systems Package Type Networking/Telecom Infrastructure Printers, Scanners, Graphic Cards, and Video Cards 16 15 14 13 1 12 VDD AGND PVDD 2 11 NC EP 3 10 ILIM BST 4 9 NC DL 5 6 7 8 Please see pin descriptions in Table 3-1. 2017 Microchip Technology Inc. DS20005922A-page 1 PGND VIN FREQ EN DH PG SW FB470F 100F MIC2101/02 Typical Application Circuit MIC2101/02 Wide Input, HyperLight Load/Hyper Speed Control Buck Converter V IN 4.5V TO 38V 2.2F 220F x3 VIN FREQ PVDD BST 0.1F VDD DH 4.7F V OUT MIC2101/02 1.5H 3.3V/12A AGND SW 5.23k 4.7nF 470F EN 10k EN DL 100F 0.1F PG PG PGND 3.24k FB ILIM 1.65k Functional Block Diagram MIC2101/2 D1 PVDD MIC2101/02 V IN 4.5V TO 38V VDD VIN LDO 4.7F 2.2F R19 220F x2 FIXED T FREQ ON 4.7F ESTIMATE VDD BST R20 MODIFIED V IN UVLO T OFF DH Q1 0.1F HSD V OUT 1.5H 100k 3.3V/12A SW CONTROL PVDD EN LOGIC EN 4.7nF TIMER R1 10k 5.23k DL Q3 SOFT-START LSD 1.65k 0.1F ZC PGND SOFT DETECTION START SHORT R2 3.24k ILIM DETECTION THERMAL SHUTDOWN COMPENSATION g EA m FB COMP VDD 49.9k VREF 8% 0.8V PG PG AGND 92% ZC DETECTION* - MIC2101 ONLY DS20005922A-page 2 2017 Microchip Technology Inc.