MIC4930 Datasheet, PDF (1/24 Pages) Micrel Semiconductor – Hyper Speed Control 3A Buck Regulator

MIC4930
Hyper Speed Control^® 3A Buck Regulator
Features
• Input Voltage: 2.7V to 5.5V
• 3A Output Current
• Up To 95% Efficiency
• Up To 3.3 MHz Operation
• Safe Start-Up into a Pre-Biased Output
• Power Good Output
• Ultra-Fast Transient Response
• Low Output Voltage Ripple
• Low R_DS(ON) Integrated MOSFET Switches
• 0.01 μA Shutdown Current
• Thermal Shutdown and Current Limit Protection
• Output Voltage as low as 0.7V
• 3 mm × 4 mm DFN-10L
• –40°C to +125°C Junction Temperature Range
Applications
• DTVs
• Set-Top Boxes
• Printers
• DVD Players
• Distributed Power Supplies
General Description
The MIC4930 is a high-efficiency, 3A synchronous
buck regulator with ultra-fast transient response
perfectly suited for supplying processor core and I/O
voltages from a 5V or 3.3V bus. The MIC4930 provides
a switching frequency up to 3.3 MHz while achieving
peak efficiencies up to 95%. An additional benefit of
high-frequency operation is very low output ripple
voltage throughout the entire load range with the use of
a small output capacitor. The MIC4930 is designed for
use with a very small inductor, down to 1 μH, and an
output ceramic capacitor as small as 10 μF without the
need for external ripple injection. A wide range of
output capacitor types and values can also be
accommodated.
The MIC4930 supports safe start-up into a pre-biased
output.
The MIC4930 is available in a 10-pin 3 mm × 4 mm
DFN package with an operating junction temperature
range from –40°C to +125°C. The MIC4930 is
pin-to-pin compatible with the 5A-rated MIC4950YFL.
Package Type
MIC4930
3x4 DFN
Top View
PGND 1
EP
PGND 2
PVIN 3
AVIN 4
AGND 5
10 SW
9 EN
8 PVIN
7 PG
6 FB
 2016 Microchip Technology Inc.
DS20005669A-page 1