SMM153
APPLICATIONS INFORMATION (CONTINUED)
Figure 4 – Typical application schematic shows the SMM153 controlling a VIN=12V, VOUT=1.5V, DC/DC converter.
This example, using the 1.25V VREF, also shows the COMP1/2 pins monitoring the DC/DC converter VOUT set to an
OV of 1.7V on COMP1 and a UV of 1.3V on COMP2, the voltage divider resistors are:
For OV, R1 = 1.37k, 1% R3 = 3.83k, 1%, For UV, R2 = 1.02k, 1% R4 = 25.5k, 1%.
The Programming Supply jumper can be used to supply the SMM153 VDD voltage from the SMX3202 programmer
when the device is programmed with board power off and the controlled supply unloaded.
Summit Microelectronics, Inc
2134 3.0 1/20/2010
10
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
