Datasheet
MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
5Maxim Integrated
Note 1: All devices are 100% production tested at T
A
= +25NC. Limits over temperature are guaranteed by design.
Note 2:
The MAX17497A is intended for use in universal input power supplies. The internal clamp circuit at IN is used to prevent
the bootstrap capacitor from charging to a voltage beyond the absolute maximum rating of the device when EN/UVLO is
low (shutdown mode). Externally limit the current to IN (hence to clamp) to 2mA (max) when EN/UVLO is low.
Note 3:
Guarantees cross conduction is avoided and it is not larger than specified max value to guarantee loop-regulation capability.
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)
Typical Operating 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.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
RESETN Higher Thresholds
EAFN rising 93.5 95 96.5
%
OUTB rising 93.5 95 96.5
RESETN Lower Thresholds
EAFN falling 90.5 92 93.5
%
OUTB falling 90.5 92 93.5
RESETN Delay After EAFN and
V
OUTB
Reach 95% Regulation
(MAX17497A/MAX17497B)
4 ms
THERMAL SHUTDOWN
Thermal Shutdown Threshold Temperature rising 160
NC
Thermal Shutdown Hysteresis 20
NC
BOOTSTRAP UVLO WAKE-UP LEVEL
vs. TEMPERATURE (MAX17497A)
MAX17497A/B toc01
TEMPERATURE (°C)
BOOTSTRAP UVLO WAKE-UP LEVEL (V)
100806040200-20
20.16
20.18
20.20
20.22
20.24
20.26
20.14
-40 120
IN UVLO WAKE-UP LEVEL
vs. TEMPERATURE (MAX17497B)
MAX17497A/B toc02
TEMPERATURE (°C)
IN UVLO WAKE-UP LEVEL (V)
100806040200-20
4.15
-40 120
3.95
4.00
4.05
4.10
3.90
IN UVLO SHUTDOWN LEVEL vs. TEMPERATURE
(MAX17497A/MAX17497B)
MAX17497A/B toc03
TEMPERATURE (°C)
IN UVLO SHUTDOWN LEVEL (V)
100806040200-20
4.015
-40 120
3.975
3.980
3.985
3.990
3.995
4.000
4.005
4.010