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
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
INPUT SUPPLY (V
IN
)
IN Voltage Range (V
IN
)
IN Supply Startup Current Under
UVLO
IN Supply Current (I
IN
)
IN Boostrap UVLO Rising
Threshold
IN Bootstrap UVLO Falling
EN/UVLO Threshold
EN/UVLO Input Leakage Current
LDO
V
CC
Output Voltage Range
V
CC
Dropout Voltage
V
CC
Current Limit
OVERVOLTAGE PROTECTION
OVI Threshold
OVI Masking Delay
OVI Input Leakage Current
0V < V
OVI
< 1.5V, T
A
= +25NC
-100
Rising
Falling
1.18
1.11
1.23
1.17
2
0
+100
1.28
1.21
V
Fs
nA
6V < V
IN
< 29V, 0mA < I
VCC
< 50mA
V
IN
= 4.5V, I
VCC
= 20mA
V
CC
= 0V, V
IN
= 6V
50
4.8
5
160
100
5.2
300
V
mV
mA
Rising
Falling
0V < V
EN/UVLO
< 1.5V, T
A
= +25NC
MAX17497A
MAX17497B
I
INSTARTUP
, V
IN
< UVLO or EN/UVLO = SGND
Switching, f
SW
= 250kHz
MAX17497A
MAX17497B
19
3.85
3.65
1.18
1.11
-100
4.5
4.5
22
2.75
20.5
4.15
3.95
1.23
1.17
0
29
36
36
4.5
22
4.4
4.25
1.28
1.21
+100
V
FA
mA
V
V
V
nA
CONDITIONS
MIN
TYP
MAX
UNITS
Maxim Integrated
2
MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
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
FLYBACK/BOOST CONVERTER
Flyback/Boost Switching
Frequency
Flyback/Boost Maximum Duty
Cycle
SSF Pullup Current
SSF Set Point Voltage
SSF Peak Current-Limit Enable
Threshold
EAFN Regulation Point
EAFN Input Bias Current
Error-Amplifier Open-Loop
Voltage Gain
Error-Amplifier Transconductance
Error-Amplifier Source Current
Error-Amplifier Sink Current
Current-Sense Transresistance
IN Clamp Voltage
LXF DMOS Switch On-Resistance
(R
DSON_LXF
)
LXF DMOS Peak Current Limit
LXF DMOS Runaway Current
Limit
LXF Leakage Current
Peak Switch Current Limit with
RLIMF Open
Runaway Switch Current Limit
with RLIMF Open
RLIMF Reference Current
Number of Flyback/Boost
Runaway Current-Limit Hits
Before Hiccup Timeout
Flyback/Boost Overcurrent
Hiccup Timeout
EN/UVLO = SGND, I
IN_
= 1mA (MAX17497A)
(Note 2)
I
LXF
= 200mA
RLIMF = 100K
RLIMF = 100K
V
LXF
= 65V, T
A
= +25NC
0.35
0.39
9
1.62
1.9
V
COMPF
= 2V, V
RLIMF
= 1V
V
COMPF
= 2V, V
EAFN
= 1V
V
COMPF
= 2V, V
EAFN
= 1.5V
1.5
80
80
0.45
31
0V < V
EAFN
< 1.5V, T
A
= +25NC
MAX17497A
MAX17497B
f
SW
= 250kHz (MAX17497A)
f
SW
= 500kHz (MAX17497B)
V
SSF
= 400mV
235
470
92
90
9
1.12
1.11
1.2
-100
90
1.8
120
120
0.5
33.5
175
1.9
2.3
0.1
0.45
0.5
10
1
2.1
210
210
0.55
36
380
2.23
2.6
2
0.54
0.6
11
250
500
94.5
92
10
1.22
1.17
1.22
265
530
97
94
11
1.24
1.21
1.24
+100
kHz
%
FA
V
V
V
nA
dB
mS
FA
FA
I
V
mI
A
A
FA
A
A
FA
#
CONDITIONS
MIN
TYP
MAX
UNITS
32
ms
Maxim Integrated
3
MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
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
Minimum On-Time
SCOMPF Pullup Current
Slope-Compensation Resistor
Range
Slope-Compensation Ramp
Default Slope-Compensation
Ramp
STEP-DOWN REGULATOR
INB Voltage Range
INB Quiescent Supply Current
INB UVLO Threshold
High-Side R
DSON
Low-Side R
DSON
Switching Frequency
LXB Leakage Current
LXB Dead Time
V
OUTB
Output-Voltage Accuracy
V
OUTB
Input Bias Current
Peak Current-Limit Fault
Threshold
Runaway Current-Limit Threshold
Soft-Start Duration Count
Number of Runaway Current-Limit
Hits Before Hiccup Timeout
Overcurrent Hiccup Timeout
Minimum On-Time
RESETN
RESETN Output Leakage Current
(Off-State)
RESETN Output Voltage
(On-State)
V
RESETN
= 5V, T
A
= +25NC
I
RESETN
= 10mA
-1
0
+1
0.4
FA
V
V
LXB
= V
INB
- 1V, V
LXB
= V
PGNDB
+ 1V,
T
A
= +25NC
(Note 3)
7V < V
INB
<16V, 50mA < I
OUT
< 600mA
V
OUTB
= 3.3V
V
OUTB
= 3.1V
V
OUTB
< 100mV
V
INB
> 7V
0.9
1.05
3.245
V
INB
= 16V, V
OUTB
> 3.3V
Rising
Falling
I
LXB
=200mA
I
LXB
=200mA
0.94
6.2
5.9
7
200
6.5
6.2
425
225
1
0.1
5
3.3
7
1.1
1.25
2048
1
32,768
100
3.355
10
1.23
1.45
16
300
6.7
6.4
800
425
1.06
1
V
FA
V
mI
mI
MHz
FA
ns
V
FA
A
A
Cycles
Hits
Cycles
ns
MAX17497B
SCOMPF = 100kI
SCOMPF = open
9
30
175
200
60
CONDITIONS
MIN
TYP
110
10
11
150
225
MAX
UNITS
ns
FA
kI
mV/Fs
mV/Fs
Maxim Integrated
4
MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
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
RESETN Higher Thresholds
RESETN Lower Thresholds
RESETN Delay After EAFN and
V
OUTB
Reach 95% Regulation
(MAX17497A/MAX17497B)
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Temperature rising
160
20
NC
NC
EAFN rising
OUTB rising
EAFN falling
OUTB falling
CONDITIONS
MIN
93.5
93.5
90.5
90.5
TYP
95
95
92
92
4
MAX
96.5
96.5
93.5
93.5
UNITS
%
%
ms
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.
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
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