MP4321 is a configurable-frequency (350KHz to 2.5MHz), synchronous, step-down switching converter with integrated internal highside and low-side power MOSFETs (HS-FET and LS-FET, respectively). The device provides up to 1A of highly efficient output current (IOUT) with peak current control mode. The wide 3.3V to 36V input voltage (VIN) range and 42V load dump tolerance accommodates a variety of step-down applications in automotive input environments. The 1µA shutdown current (ISD) allows the converter to be used in battery powered applications. High power conversion efficiency across the entire load range is achieved by scaling down the switching frequency (fSW) under light-load conditions to reduce switching and gate driver losses. An open drain power good (PG) signal indicates whether the output is within 94.5% to 105.5% of its nominal voltage. Applications include USB chargers, aftermarket automotive applications, battery-powered systems and general consumer applications.
- Designed for aftermarket automotive applications, 42V load dump tolerance
- Supports 3.1V for cold crank conditions, operating junction temperature range from -40°C to +125°C
- Increases battery life, 20µA sleep mode quiescent Current
- Advanced asynchronous modulation (AAM) mode for increased efficiency under light load conditions
- High performance for improved thermals, 70mohm/50mohm Integrated MOSFETs
- 65ns minimum on-time (tON
- MIN), 50ns minimum off time (tOFF
- MIN)
- Frequency spread spectrum (FSS) modulation, symmetric VIN pinout, CISPR25 Class 5 compliant
- 350KHz to 2.5MHz configurable switching frequency (fSW), MeshConnect� flip-chip package
- Power good (PG) output, overcurrent protection (OCP) with hiccup mode
- Frequency foldback prevents inductor current (IL) runaway during start-up, thermal shutdown
Footnotes MPS part numbers ending in "-P" and "-Z" are the same parts. P & Z only indicates reel size.
Other details
| Brand |
MONOLITHIC POWER SYSTEMS (MPS) |
| Part Number |
MP4321GDE-P |
| Quantity |
Each (Supplied on Cut Tape) |
| Technical Data Sheet EN |
 |
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