General DescriptionThe MAX17498A/MAX17498B/MAX17498C devices are current-mode fixed-frequency flyback/boost converters with a minimum number of external components. They contain all the control circuitry required to design wide input voltage isolated and nonisolated power supplies. The MAX17498A has its rising/falling undervoltage lockout (UVLO) thresholds optimized for universal offline (85V AC to 265V AC) applications, while the MAX17498B/MAX17498C support UVLO thresholds suitable to low voltage DC-DC applications.

Benefits and Features♦ Peak Current-Mode Converter
♦ Current-Mode Control Provides Excellent
Transient Response
♦ Fixed Switching Frequency
◇ 250kHz: MAX17498A/MAX17498C
◇ 500kHz: MAX17498B
♦ Flexible Error Amplifier to Regulate Both Positive
and Negative Outputs
♦ Programmable Soft-Start to Reduce Input Inrush Current
♦ Programmable Voltage or Current Soft-Start
♦ Power-Good Signal (PGOOD)
♦ Reduced Power Dissipation Under Fault
◇ Overcurrent Protection
◇ Thermal Shutdown with Hysteresis
♦ Robust Protection Features
◇ Programmable Current Limit
◇ Input Overvoltage Protection
♦ Optimized Loop Performance
◇ Programmable Slope Compensation
♦ High Efficiency
◇ Low RDSON, 175mI, 65V Rated Internal
n-Channel MOSFET
◇ No Current-Sense Resistor
♦ Optional Spread Spectrum
♦ Space-Saving, 16-Pin (3mm x 3mm) TQFN Package

Applications Front-End AC-DC Power Supplies for Industrial Applications (Isolated and Nonisolated)
Telecom Power Supplies
Wide Input Range DC Input Flyback/Boost Industrial Power Supplies

Manufacturer	Maxim Integrated
Product Category	AC DC Converters, Offline Switchers
Series	MAX17498A
Product	Current Mode Converters
Type	Current Mode PWM Controllers
Packaging	Alternate Packaging
Mounting-Style	SMD/SMT
Operating-Temperature-Range	- 40 C to + 125 C
Package-Case	16-WFQFN Exposed Pad
Operating-Temperature	-40°C ~ 125°C (TJ)
Mounting-Type	Surface Mount
Supplier-Device-Package	16-TQFN (3x3)
Watt	-
Number-of-Outputs	1 Output
Output-Isolation	Either
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Boost, Flyback
Voltage-Start-Up	-
Voltage-Supply-Vcc-Vdd	4.5 V ~ 29 V
Duty-Cycle	94.50%
Frequency-Switching	250kHz
Fault-Protection	Current Limiting, Over Voltage
Control-Features	EN, Power Good, Soft Start
Maximum Operating Temperature	+ 125 C
Output-Voltage	5 V
Operating-Supply-Current	1.8 mA
Switching-Frequency	250 kHz
Part-#-Aliases	MAX17498A
Package-Case	TQFN-16
Duty-Cycle-Max	92 %
Input-Supply-Voltage-Min	4.5 V
Input-Supply-Voltage-Max	29 V