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MP9943

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High Efficiency 3A Peak, 36V, Synchronous Step Down Converter with Power Good

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Datasheet (EN)

Product Description

The MP9943 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include over-current protection and thermal shutdown. The MP9943 requires a minimal number of readily-available standard external components, and is available in a space-saving QFN-8 (3mmx3mm) package.

Product Features

Wide 4V to 30V Continuous Operating Input Range
36V Input Transient Tolerance
85mO/55mO Low RDS(ON) Internal Power MOSFETs
High-Efficiency Synchronous Mode Operation
410kHz Switching Frequency
Synchronizes from 200kHz to 2.2MHz External Clock
High Duty Cycle for Automotive Cold-crank
Internal Power-Save Mode
Internal Soft-Start
Power Good Indicator
Over Current Protection and Hiccup
Thermal Shutdown
Output Adjustable from 0.8V
Available in an QFN-8 (3mmx3mm) package

Parametrics

fsw (max) (kHz)410
Vin (min) (V)4
Vin (max) (V)30
Iout (max) (A)3
Isw Limit (typ) (A)4.4
Max Duty Cycle (%)0.95
Vfb (V)0.792
Iq (typ) (mA)0.5
Regulated Outputs1
Vout (max) (V)28.5
Vout (min) (V)0.8
GradeCatalog
PackageQFN-8 (3x3)
Control ModeCurrent Mode
Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
Special FeaturesExternal Frequency Sync

High-Efficiency, 3A Peak, 36V, 410kHz Step-Down Converter with Power Good Evaluation Board

The EV9943-Q-00A demonstrates MPS’s MP9943, a high-frequency, synchronous, rectified, step-down converter with built-in high-side and low-side power MOSFETs. The MP9943 offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range.

Current-mode operation provides fast transient response and eases loop stabilization.

Full protection features includes over-current protection and thermal shutdown.

The MP9943 requires a minimal number of readily-available s is available in a space-saving QFN8 (3mm x 3mm) package.

$25.00 + tax