MP5403
NOT RECOMMENDED FOR NEW DESIGNS
6V Mini PMIC with High Efficiency Dual 2.5A/3.5A Buck, One Load Switch and Input Power Supervisory
MP5403 continues to be in production for existing customers. Please consider this alternative for new designs:

MP5479GRM
MP5479GRM
2.7V to 5.5V PMIC with 4 Buck Converters (2A/2.5A/4.5A/4.5A), 5 LDOs, and Configurable System Settings via the I2C and MTP
Features & Benefits
- High-Efficiency Step-Down Converters:
- Buck 1: 4.5A DC/DC Converter
- Buck 2: 2.5A DC/DC Converter
- Buck 3: 4.5A DC/DC Converter
- Buck 4: 2A DC/DC Converter
- Buck 1 and Buck 3 Can Work in Parallel
- Buck 2 and Buck 4 Can Work in Parallel
- 2.7V to 5.5V Operating Input Voltage (VIN) Range
- Buck 1, Buck 2, and Buck 3 Optional VOUT Range: 0.4V to 3.58V/12.5mV Step or 0.4V to 2.2V/7.4mV Step
- Buck 4 VOUT Range: 0.4V to 3.58V/12.5mV Step
- Adjustable Switching Frequency (fSW)
- Adjustable Soft-Start Time (tSS)
- Adjustable Phase Delay
- Configurable PWM Mode, Auto-PFM Mode, and Forced PWM Mode
- Output Over-Current Protection (OCP)
- Output Over-Voltage Protection (OVP)
- One Dedicated RTC LDO
- Four Low-Noise LDOs
- Two Separate Input Power Supplies
- 50mV Dropout at 300mA Load
- System:
- I2C Bus and User-Configurable MTP
- Two-Time Programmable MTP with MP5479GRM-0000
- Power-On/Off Control
- Multi-Function LDO2/EN1 Pin (EN1 Input Logic Level ≤ 3.3V)
- Power-On Reset Output
- Flexible Power-On/Off Sequence via the MTP (0.5ms, 2ms, 8ms, or 16ms Selectable Time Slot)
- Flexible DC/DC, LDO On/Off via the MTP
- Available in a QFN-26 (3.5mmx4.5mm) Package
- Optimized Performance with MPS Inductor MPL-AL6050 Series
… and many more!
Active Part Numbers:
MP5403GQBU-P MP5403GQBU-Z
Meaning of P & Z
Evaluation Tools

EV5403-QB-02A Evaluation Kit High Efficiency Dual Buck and One Load Switch Power Management Unit EV Board
The EV5403-QB-02A Evaluation Board is designed to demonstrate the capabilities of MPS’ MP5403. The MP5403 is a monolithic power management unit containing two high efficiency step-down switching converters and a load switch. The two regulators supply current up to 3.5A and 2.5A separately and the load switch supplies up to 3A load current with extremely low RON resistance. With the input range up to 6V, the MP5403 is ideal for powering ASIC and SOC for Solid-State Drive or other compact power systems.
The MP5403 requires a minimum number of readily available standard external components and is available in a small QFN20 (2.5mmx3mm) package.
Recommended Inductors

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