MIC28304 70V, 3A Power Module Hyper Speed Control Family Features General Description Easy to Use: Microchips MIC28304 is a synchronous, step-down regulator module, featuring a unique adaptive on-time - Stable with low-ESR ceramic output control architecture. The module incorporates a capacitor DC-to-DC controller, power MOSFETs, bootstrap diode, - No compensation and no inductor to choose bootstrap capacitor and an inductor in a single package. 4.5V to 70V Input Voltage The MIC28304 operates over an input supply range Single-Supply Operation from 4.5V to 70V and can be used to supply up to 3A of Power Good (PG) Output output current. The output voltage is adjustable down to Low Radiated Emission (EMI) per EN55022, 0.8V with an ensured accuracy of 1%. The device Class B operates with a programmable switching frequency from Adjustable Current Limit 200 kHz to 600 kHz. Adjustable Output Voltage from 0.8V to 24V (also Microchips HyperLight Load architecture provides the limited by duty cycle) same high-efficiency and ultra-fast transient response as 200 kHz to 600 kHz Programmable Switching the Hyper Speed Control architecture under the Frequency medium to heavy loads. The architecture also maintains Supports Safe Start-up into a Pre-Biased Output high efficiency under light load conditions by transitioning -40C to +125C Junction Temperature Range to Variable Frequency Discontinuous mode operation. Available in 64-Pin, 12 mm x 12 mm x 3 mm The MIC28304 offers a full suite of protection features. QFN Package These include undervoltage lockout, internal soft start, foldback current limit, Hiccup mode short-circuit Applications protection and thermal shutdown. Data sheets and other support documentation can be Distributed Power Systems found on the Microchip web site at: www.microchip.com. Industrial, Medical, Telecom and Automotive Typical Application Schematic Efficiency vs. V IN PV ANODE BSTC BSTR DD 4.5V to 70V Output Current (MIC28304-1 PV IN V IN 2.2 F 100 F x2 24 V 12 V IN IN V OUT 5V/3A EN EN V OUT 16.5 k MIC28304 SW 2.2 nF 10 k FREQ 3.57 k 0.1 F 47 F I LIM x2 V = 5V OUT FB 75 k F = 275 kHz SW 1.91 k 10 pF PG PGOOD GND PGND GND OUTPUT CURRENT (A) 2018 Microchip Technology Inc. DS20006093A-page 1 EFFICIENCY (%)MIC28304 Package Types 1 50 GND ANODE 49 2 ANODE GND 3 48 GND SW 47 4 I SW LIM 5 46 V SW IN 6 45 SW SW 7 44 FREQ SW 8 43 FREQ SW 42 PGND 9 SW 10 41 PGND SW 40 11 SW PGND 12 39 PGND NC 13 38 PGND V OUT 14 PV 37 V IN OUT 15 36 PV V IN OUT 16 35 PV V IN OUT 34 PV 17 V IN OUT 18 33 PV V IN OUT 64-Pin 12 mm x 12 mm H3QFN (MP) (Top View) Functional Block Diagram BSTR PV BSTC IN V IN 4.5 to 70V D BST ANODE V IN R 1 BST BST V CPV IN IN C BST N2 0.1 F DH L IN V PV OUT DD V OUT PV SW DD 4.7 H 5V/3A V IN I -ADJ LIM CV R DD FREQ I R15 2.2 F LIM 100k CONTROLLER 2.7 k C ff EN 2.2 nF N1 EN DL SW C PV OUT FREQ DD 47 F FREQ C inj 0.1 F FB PGOOD FB PGOOD C6 PGND 10 pF GND R11 R19 DNP PGND GND DS20006093A-page 2 2018 Microchip Technology Inc. C IN 100 F C IN 2 2.2 F 19 64 PV GND IN 20 PV 63 NC IN 21 PV 62 PV IN DD 22 61 PV PV IN DD V 23 60 V OUT IN 24 V 59 EN OUT 58 V 25 PGOOD OUT 26 57 V FB OUT 56 V 27 BSTR OUT 28 55 V BSTR OUT 29 54 V GND OUT 53 V 30 BSTC OUT 31 52 V BSTC OUT 32 51 V SW OUT R inj R1 16.5 k 10 k