Renesas ISL8273M, User Manual

Page: 14 / 17

UG036 Rev 0.00 Page 14 of 17
August 7, 2015
lSL8273MEVAL1Z
FIGURE 22. LOAD TRANSIENT RESPONSE AT V
IN
= 12V, V
OUT
= 1V,
I
OUT
= 0A TO 40A (>100A/ μ s), f
SW
= 300kHz.
C
OUT
= 14 x 100 μ F C 6 x 470 μ F POSCAP
FIGURE 23. LOAD TRANSIENT RESPONSE AT V
IN
= 12V, V
OUT
= 2.5V,
I
OUT
= 0A TO 40A (>100A/ μ s), f
SW
= 800kHz.
C
OUT
= 6 x 100 μ F C 3 x 470 μ F POSCAP
FIGURE 24. SOFT-START AT V
IN
= 12V, V
OUT
= 1V, TON_DELAY = 5ms,
TON_RISE = 5ms, POWER_GOOD_DELAY = 3ms
FIGURE 25. SOFT-STOP AT V
IN
= 12V, V
OUT
= 1V, TOFF_DELAY = 5ms,
TOFF_FALL = 5ms
FIGURE 26. OUTPUT SHORT-CIRCUIT PROTECTION AT V
IN
= 12V,
V
OUT
= 1V, f
SW
= 421kH
z
FIGURE 27. OUTPUT OVERVOLTAGE PROTECTION AT V
IN
= 12V,
V
OUT
= 1V, f
SW
= 421kHz,
VOUT_OV_FAULT_LIMIT = 1.15V
Typical Performance Data
The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued)
V
OUT
(50mV/DIV)
I
OUT
(20A/DIV)
50µs/DIV
ASCR GAIN = 140
RESIDUAL = 90
ASCR GAIN = 220
RESIDUAL = 90
V
OUT
(100mV/DIV)
I
OUT
(20A/DIV)
50µs/DIV
ENABLE
V
OUT
(500mV/DIV)
POWER GOOD
5ms/DIV
ENABLE
V
OUT
(500mV/DIV)
POWER GOOD
5ms/DIV
SW1 (10V/DIV)
SW2 (10V/DIV)
V
OUT
(500mV/DIV)
50µs/DIV
I
IN
5A/DIV
SW1 (10V/DIV)
SW2 (10V/DIV)
V
OUT
(500mV/DIV)
50µs/DIV