MP5403B

MP5403B

NOT RECOMMENDED FOR NEW DESIGNS

Mini PMIC with Dual 4A/5A Peak Bucks, One 2A Load Switch, and Input Power Supervisory

ALTERNATIVE PART

NRFND Datasheet

MP5403B continues to be in production for existing customers. Please consider this alternative for new designs:

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 (V_IN) Range
- Buck 1, Buck 2, and Buck 3 Optional V_OUT Range: 0.4V to 3.58V/12.5mV Step or 0.4V to 2.2V/7.4mV Step
- Buck 4 V_OUT Range: 0.4V to 3.58V/12.5mV Step
- Adjustable Switching Frequency (f_SW)
- Adjustable Soft-Start Time (t_SS)
- 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!

Description

The MP5403B is a monolithic power management unit containing two high-efficiency, step-down, switching converters and a load switch. The two regulators supply peak currents up to 5A and 4A separately, and the load switch supplies up to 3A of load current with an extremely low RDS(ON). With an input range of up to 6V, the MP5403B is ideal for powering ASIC and SOC for solid-state drives (SSD) and other compact power systems.
The peak-current-mode control scheme with pulse-skip mode operation provides the two switchers with fast transient response, high light-load efficiency, and a minimal number of capacitors by using an interleaving PWM clock between the two switchers. The 3A load switch with a low 20mΩ on resistance provides flexible system configuration.
A full set of enable control pins and power good open-drain indicators allow for easy implementation of the start-up and shutdown sequences.
Full protection features include over-current protection (OCP) and thermal shutdown.
The MP5403B requires a minimal number of readily available, standard, external components and is available in a small UTQFN-20 (2.5mmx3mm) package.