4 / 12 page
Rev. 0.87 – January 2006
EN5312Q
1.4V. Any level between these two values is
indeterminate.
AGND (Bottom thermal/ground pad): System
ground for single point grounding. Also functions
as thermal pad to remove heat from package.
Connect to surface or PWB internal ground plane.
Functional Block Diagram
Voltage
Select
DAC
Switch
VREF
(+)
(-)
Error
Amp
V
SENSE
V
FB
V
OUT
VS0 VS1 VS2
Package Boundry
P-Drive
N-Drive
UVLO
Thermal Limit
Current Limit
Ramp Control
Soft Start
Sawtooth
Generator
(+)
(-)
PWM
Comp
V
IN
ENABLE
Figure 4. Functional block diagram.
Rev. 0.87 – January 2006
www.enpirion.com
4