Datasheet

MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
2Maxim Integrated
IN to SGND ............................................................-0.3V to +40V
EN/UVLO to SGND
....................................... -0.3V to V
IN
+ 0.3V
OVI to SGND
...............................................-0.3V to V
CC
+ 0.3V
V
CC
to SGND ..........................................................-0.3V to +6V
SSF, RLIMF, EAFN, COMPF, SCOMPF
to SGND
............................................... -0.3V to (V
CC
+ 0.3V)
LXF to SGND
.........................................................-0.3V to +70V
INB to SGND
.........................................................-0.3V to +26V
LXB to SGND
.............................................. -0.3V to V
INB
+ 0.3V
OUTB to SGND
.......................................................-0.3V to +6V
RESETN to SGND
....................................................-0.3V to +6V
PGNDF, PGNDB to SGND
...................................-0.3V to +0.3V
Continuous Power Dissipation (Single-Layer Board)
TQFN (derate 20.8mW/NC above +70NC)..................1700mW
Operating Temperature Range
........................ -40NC to +125NC
Storage Temperature Range
............................ -65NC to +160NC
Junction Temperature (continuous)
................................+150NC
Lead Temperature (soldering, 10s)
................................+300NC
Soldering Temperature (reflow)
......................................+260NC
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(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
INPUT SUPPLY (V
IN
)
IN Voltage Range (V
IN
)
MAX17497A 4.5 29
V
MAX17497B 4.5 36
IN Supply Startup Current Under
UVLO
I
INSTARTUP
, V
IN
< UVLO or EN/UVLO = SGND 22 36
FA
IN Supply Current (I
IN
) Switching, f
SW
= 250kHz 2.75 4.5 mA
IN Boostrap UVLO Rising
Threshold
MAX17497A 19 20.5 22
V
MAX17497B 3.85 4.15 4.4
IN Bootstrap UVLO Falling 3.65 3.95 4.25 V
EN/UVLO Threshold
Rising 1.18 1.23 1.28
V
Falling 1.11 1.17 1.21
EN/UVLO Input Leakage Current
0V < V
EN/UVLO
< 1.5V, T
A
= +25NC
-100 0 +100 nA
LDO
V
CC
Output Voltage Range 6V < V
IN
< 29V, 0mA < I
VCC
< 50mA 4.8 5 5.2 V
V
CC
Dropout Voltage V
IN
= 4.5V, I
VCC
= 20mA 160 300 mV
V
CC
Current Limit V
CC
= 0V, V
IN
= 6V 50 100 mA
OVERVOLTAGE PROTECTION
OVI Threshold
Rising 1.18 1.23 1.28
V
Falling 1.11 1.17 1.21
OVI Masking Delay 2
Fs
OVI Input Leakage Current
0V < V
OVI
< 1.5V, T
A
= +25NC
-100 0 +100 nA