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MP3421

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5.5A, 600kHz High Efficiency, Synchronous Step-Up Converter with Output Disconnect

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Datasheet (EN)

Product Description

The MP3421 is a high-efficiency, synchronous, current–mode, step-up converter with true output disconnect.
The MP3421 starts up from low input voltage (as low as 1.9V) while providing in-rush current limiting and output short-circuit protection. The integrated, P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode; the P-channel disconnects the output load from the input during shutdown.
The MP3421 has 600kHz switching frequency, which accommodates small external components. In addition, its internal compensation and soft-start functions minimize external component count. The MP3421 provides a compact solution for a 5V output, 2.1A load requirement, using a supply voltage as low as 2.8V.
The MP3421 is available in a 14-pin QFN 2mmx2mm package.

Product Features

Support 5V/2.1A Output at 2.8V Input
Up to 98% Efficiency
1.9V to 5.5V Input Range
2.5V to 5.5V Output Range
Internal Synchronous Rectifier
600kHz Fixed-Switching Frequency
>5.5A Switch-Current Limit Capability
43uA Quiescent Current
High-Efficiency over Full-Load Range
Internal Soft-start and Compensation
Output-Load Disconnect from Input
OCP, SCP, OVP and OTP Protection
Small 2x2mm QFN14 Package

Parametrics

Vout (min) (V)2.5
Vin (min) (V)1.9
Vin (max) (V)5.5
Isw Limit (typ) (A)5.5
Iq (typ) (mA)0.043
Regulated Outputs1
fsw (max) (kHz)600
Vout (max) (V)5.5
Vfb (V)0.807
PackageQFN-14 (2x2)
GradeCatalog
Special FeaturesEnable, Output Disconnect
SSInternal
Down ModeNo
PGNo
Input/Output DisconnectYes

5.5A, 600kHz Synchronous Step-up Converter with Output Disconnect Evaluation Board

EV3421-G-00A Evaluation Board is designed to demonstrate the capability of MP3421. MP3421 is a high-efficiency, synchronous, current-mode, step-up converter with output disconnect.

The MP3421 can provide inrush current limiting and output short-circuit protection. It can work with an input voltage as low as 1.9V. The integrated P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode. The PMOS disconnects the output from the input when the part shuts down.

The 600kHz switching frequency allows for small external components, while the internal compensation and soft-start minimize the external component count. The MP3421 is available in 14-pin QFN 2mmx2mm package.

$25.00 + tax