Datasheet

MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
4Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +15V, V
EN/UVLO
= +2V, COMPF = open, C
IN
= 1FF, C
VCC
= 1FF, T
A
= T
J
= -40NC to +125NC, unless otherwise noted. Typical
values are at T
A
= +25NC.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum On-Time 110 ns
SCOMPF Pullup Current 9 10 11
FA
Slope-Compensation Resistor
Range
MAX17497B 30 150
kI
Slope-Compensation Ramp
SCOMPF = 100kI
175 200 225
mV/Fs
Default Slope-Compensation
Ramp
SCOMPF = open 60
mV/Fs
STEP-DOWN REGULATOR
INB Voltage Range 7 16 V
INB Quiescent Supply Current V
INB
= 16V, V
OUTB
> 3.3V 200 300
FA
INB UVLO Threshold
Rising 6.2 6.5 6.7
V
Falling 5.9 6.2 6.4
High-Side R
DSON
I
LXB
=200mA 425 800
mI
Low-Side R
DSON
I
LXB
=200mA 225 425
mI
Switching Frequency 0.94 1 1.06 MHz
LXB Leakage Current
V
LXB
= V
INB
- 1V, V
LXB
= V
PGNDB
+ 1V,
T
A
= +25NC
0.1 1
FA
LXB Dead Time (Note 3) 5 ns
V
OUTB
Output-Voltage Accuracy 7V < V
INB
<16V, 50mA < I
OUT
< 600mA 3.245 3.3 3.355 V
V
OUTB
Input Bias Current V
OUTB
= 3.3V 7 10
FA
Peak Current-Limit Fault
Threshold
V
OUTB
= 3.1V 0.9 1.1 1.23 A
Runaway Current-Limit Threshold V
OUTB
< 100mV 1.05 1.25 1.45 A
Soft-Start Duration Count V
INB
> 7V 2048 Cycles
Number of Runaway Current-Limit
Hits Before Hiccup Timeout
1 Hits
Overcurrent Hiccup Timeout 32,768 Cycles
Minimum On-Time 100 ns
RESETN
RESETN Output Leakage Current
(Off-State)
V
RESETN
= 5V, T
A
= +25NC
-1 +1
FA
RESETN Output Voltage
(On-State)
I
RESETN
= 10mA 0 0.4 V