XR76108 Datasheet, PDF (8/17 Pages) Exar Corporation – 8A and 12A Synchronous Step Down COT Regulator

XR76108 and XR76112
Typical Performance Characteristics
All data taken at VIN=12V, VOUT=1.2V, f=600kHz, TA=25°C, No Air flow, Forced CCM, unless otherwise specified. Schematic
and BOM from Applications Circuit section of this datasheet.
500
490
480
470
460
450
440
430
420
410
400
-40 -20 0 20 40 60 80 100 120
Tj (°C)
Figure 11: On-Time vs. temperature
SW
70
60
50
40
30
-40 -20 0 20 40 60 80 100 120
Tj (°C)
Figure 12: ILIM vs. temperature
SW
VOUT
AC coupled
20MHz Filter
36mV
-73mV
IL
40us/d
∆IOUT/∆t
=2.5A/us
Figure 13: XR76108 load step, DCM/CCM, 0A-4A-0A
SW
VOUT
AC coupled
20MHz Filter
-35mV
47mV
IL
∆IOUT/∆t
40us/d
=2.5A/us
Figure 14: XR76108 load step, Forced CCM, 4A-8-4A
SW
VOUT
AC coupled
20MHz Filter
50mV
-80mV
IL
20us/d
∆IOUT/∆t
=2.5A/us
Figure 15: XR76112 load step, DCM/CCM, 0A-6A-0A
VOUT
AC coupled
20MHz Filter
-50mV
60mV
IL
∆IOUT/∆t
20us/d
=2.5A/us
Figure 16: XR76112 load step, Forced CCM, 6A-12A-6A
© 2013-2014 Exar Corporation
8/17
www.exar.com
Rev. 2A