LMG5200_15 Datasheet, PDF (13/23 Pages) Texas Instruments – GaN TECHNOLOGY PREVIEWLMG5200 80-V, GaN Half-Bridge Power Stage

www.ti.com
9 Application and Implementation
LMG5200
SNOSCY4A – MARCH 2015 – REVISED MARCH 2015
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
Figure 11 shows a buck converter application with VCC connected to a 5-V supply. It is critical to optimize the
power loop (loop impedance from VIN capacitor to PGND). Having a high power loop inductance causes
significant ringing in the SW node and also causes the associated power loss. Refer to the layout guidelines to
minimize this power loop.
PWM
Controller
3
2
HS
HB
VIN 1
4 HI
5 LI
LMG5200 ^{SW 8}
VCC
6
PGND 9
AGND
7
5-V V_IN
V_OUT
Figure 11. Typical Connection Diagram For a Buck Converter
10 Power Supply Recommendations
For proper operation, power-up the VCC rail before the VIN rail. Similarly, power-down the VIN rail before the
VCC rail.
CAUTION
Failure to follow correct power-up and power-down procedures can cause catastrophic
failure of the device.
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: LMG5200
Submit Documentation Feedback
13