MIC28304 Datasheet, PDF (2/39 Pages) Micrel Semiconductor – 70V 3A Power Module

Micrel, Inc.
Ordering Information
Part Number
Switching
Frequency
Features
Package
MIC28304-1YMP 200kHz to 600kHz HyperLight Load
64-pin 12mm × 12mm QFN
MIC28304-2YMP 200kHz to 600kHz Hyper Speed Control 64-pin 12mm × 12mm QFN
Junction
Temperature
Range
–40°C to +125°C
–40°C to +125°C
MIC28304
Lead
Finish
Pb-Free
Pb-Free
Pin Configuration
64-Pin 12mm × 12mm QFN (MP)
(Top View)
Pin Description
Pin Number
1, 2, 3, 54, 64
4
5, 60
6, 40 to 48, 51
Pin Name
GND
ILIM
VIN
SW
Pin Function
Analog Ground. Ground for internal controller and feedback resistor network. The analog ground
return path should be separate from the power ground (PGND) return path.
Current Limit Setting. Connect a resistor from SW (pin #4) to ILIM to set the over-current threshold
for the converter.
Supply Voltage for Controller. The VIN operating voltage range is from 4.5V to 70V. A 0.47μF
ceramic capacitor from VIN (pin # 60) to AGND is required for decoupling. The pin # 5 should be
externally connected to either PVIN or pin # 60 on PCB.
Switch Node and Current-Sense Input. High current output driver return. The SW pin connects
directly to the switch node. Due to the high-speed switching on this pin, the SW pin should be routed
away from sensitive nodes. The SW pin also senses the current by monitoring the voltage across
the low-side MOSFET during OFF time.
March 25, 2014
2
Revision 1.1