MIC2103YML-TR Microchip

MIC2103/4 75V Synchronous Buck Controllers Featuring Adaptive ON-Time Control Features General Description Hyper Speed Control Architecture Enables: The MIC2103/4 are constant-frequency, synchronous buck controllers that feature a unique adaptive ON-time - High Delta V Operation control architecture. The MIC2103/4 operates over an (V = 75V and V = 1.2V) IN OUT input supply range from 4.5V to 75V and can be used - Any Capacitor Stable to supply up to 15A of output current. The output 4.5V to 75V 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 (MIC2103 Only) high-efficiency and ultra-fast transient response as the (MIC2104 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 MIC2103/4 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. DS20005899A-page 1 PGND VIN FREQ EN DH PG SW FB470F 100F 470F 100F ILIM MIC2103/4 Typical Application Circuit MIC2103/4 3x3 QFN VIN 6.0V to 75V 2.2F 100F x3 VIN FREQ MIC2103/04 BST PVDD 0.1F VDD DH 1F VOUT 6.1H 5V/10A AGND SW 95.3k 2.2nF EN 10k DL EN 0.1F PG PG PGND 1.91k FB ILIM 2.21k Functional Block Diagram MIC2103/4 D1 PVDD MIC2103/04 VIN 1F 6.0V to 75V VDD VIN LDO 2.2F R19 100F 1F FIXED T FREQ x2 ON ESTIMATE VDD BST R20 MODIFIED V IN UVLO T OFF DH Q1 0.1F HSD VOUT 6.1H 100k 5.0V/10A SW CONTROL PVDD EN LOGIC EN 4.7nF TIMER R1 10k 95.3k DL SOFT-START Q3 LSD 2.21k 0.1F ZC PGND * SOFT DETECTION START R2 1.91k SHORT THERMAL DETECTION SHUTDOWN COMPENSATION gm EA FB COMP VDD 49.9k V 8% REF PG 0.8V PG AGND 92% ZC DETECTION* -- MIC2103 ONLY DS20005899A-page 2 2017 Microchip Technology Inc.