Document
MIC45208-1/-2
26V, 10A DC-to-DC Power Module
Features
• No Compensation Required • Up to 10A Output Current • >93% Peak Efficiency • Output Voltage: 0.8V to 0.85*VIN with
±1% Accuracy • Adjustable Switching Frequency from 200 kHz to
600 kHz • Enable Input and Open-Drain Power Good (PG)
Output • Hyper Speed Control® (MIC45208-2) Architecture
enables Fast Transient Response • HyperLight Load® (MIC45208-1) improves Light
Load Efficiency • Supports Safe Start-up into Pre-Biased Output • –40 C to +125°C Junction Temperature Range • Thermal Shutdown Protection • Short-Circuit Protection with Hiccup mode • Adjustable Current Limit • Available in 52-Pin 10 mm x 10 mm x 4 mm QFN
Package
Applications
• High-Power Density Point-of-Load (POL) Conversion
• Servers, Routers, Networking and Base Stations • FPGAs, DSP and Low-Voltage ASIC Power Supplies • Industrial and Medical Equipment
Typical Application Schematic
General Description
The MIC45208-1/-2 is a synchronous, step-down regulator module, featuring a unique adaptive ON-time control architecture. The module incorporates a DC-to-DC controller, power MOSFETs, bootstrap diode, bootstrap capacitor and an inductor in a single package, simplifying the design and layout process for the end user.
This highly integrated solution expedites system design and improves product time-to-market. The internal MOSFETs and inductor are optimized to achieve high efficiency at a low-output voltage. The fully optimized design can deliver up to 10A current under a wide input voltage range of 4.5V to 26V, without requiring additional cooling.
The MIC45208-1 uses the HyperLight Load (HLL) while the MIC45208-2 uses Hyper Speed Control (HSC) architecture, which enables ultra-fast load transient response, allowing for a reduction of output capacitance. The MIC45208 offers 1% output accuracy that can be adjusted from 0.8V to 0.85*VIN with two external resistors. Additional features include thermal shutdown protection, input undervoltage lockout, adjustable current limit and short-circuit protection. The MIC45208 allows for safe start-up into a pre-biased output.
Data sheet and other support documentation can be found on the Microchip web site at: www.microchip.com.
VIN 12V
CIN ON
OFF
PVDD 5VDD PG
ANODE BST RIA
PVIN VIN MIC45208 FREQ
EN
VOUT
FB RIB SW
GND
ILIM PGND
VOUT 1.5V/10A
CFF RLIM
RFB1
COUT
RFB2
2017 Microchip Technology Inc.
DS20005603A-page 1
MIC45208-1/-2
Package Types
MIC45208-1/-2 52-Pin 10 mm x 10 mm QFN (MP)
(Top View)
52 GND 51 ILIM 50 FREQ 49 VIN 48 EN 47 PG 46 FB 45 GND 44 BST 43 BST 42 BST
5VDD 1 5VDD 2 PVDD 3 PVDD 4 PGND 5 PGND 6
PGND 7 KEEPOUT 8
SW 9 SW 10 SW 11
KEEPOUT 12 PVIN 13 PVIN 14 PVIN 15
PGND PVIN ePAD
SW VOUT ePAD
41 ANODE 40 ANODE 39 RIB 38 RIA 37 RIA 36 KEEPOUT 35 SW 34 SW 33 SW 32 SW 31 SW 30 KEEPOUT 29 VOUT 28 VOUT 27 VOUT
PVIN 16 PVIN 17 PVIN 18 PVIN 19 KEEPOUT 20 VOUT 21 VOUT 22 V 23
OUT
VOUT 24 VOUT 25 VOUT 26
DS20005603A-page 2
2017 Microchip Technology Inc.
Func.