MAX17497A View Datasheet(PDF) - Maxim Integrated

Part Name

Description

View to exact match

MAX17497A

AC-DC and DC-DC Peak Current-Mode Converters with Integrated Step-Down Regulator

Maxim Integrated 

MAX17497A/MAX17497B

AC-DC and DC-DC Peak Current-Mode Converters

with Integrated Step-Down Regulator

Layout, Grounding, and Bypassing

All connections carrying pulsed currents must be very

short and as wide as possible. The inductance of these

connections must be kept to an absolute minimum due

to the high di/dt of the currents in high-frequency switch-

ing power converters. This implies that the loop areas for

forward and return pulsed currents in various parts of the

circuit should be minimized. Additionally, small-current

loop areas reduce radiated EMI. Similarly, the heatsink

of the main MOSFET presents a dV/dt source; therefore,

the surface area of the MOSFET heatsink should be mini-

mized as much as possible.

Ground planes must be kept as intact as possible. The

ground plane for the power section of the converter

should be kept separate from the analog ground plane,

except for a connection at the least noisy section of the

power ground plane, typically the return of the input filter

capacitor. The negative terminal of the filter capacitor,

the ground return of the power switch, and the current-

sensing resistor must be close together. PCB layout also

affects the thermal performance of the design. A number

of thermal vias that connect to a large ground plane

should be provided under the exposed pad of the part for

efficient heat dissipation. For a sample layout that ensures

first-pass success, refer to the MAX17497A evaluation kit

layout available at www.maximintegrated.com.

For universal AC input designs, follow all applicable

safety regulations. Offline power supplies can require UL,

VDE, and other similar agency approvals.

PART

MAX17497AATE+

TEMP RANGE

-40NC to +125NC

PIN-PACKAGE

16 TQFN

MAX17497BATE+

-40NC to +125NC

16 TQFN

+Denotes a lead(Pb)-free/RoHS-compliant package.

Ordering Information

DESCRIPTION

250kHz, Offline Flyback Converter with 3.3V, 600mA

Synchronous Step-Down Converter

500kHz, Flyback/Boost Converter with 3.3V, 600mA

Synchronous Step-Down Converter

Package Information

For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a

“+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the

drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE

16 TQFN

PACKAGE CODE

T1633+5

OUTLINE NO.

21-0136

LAND PATTERN NO.

90-0032

Maxim Integrated

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