MP5479

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

Description

The MP5479 is a complete power management solution that integrates four high-efficiency step-down DC/DC converters, five low-dropout (LDO) regulators, and a flexible I²C interface.

Constant-on-time (COT) control in the DC/DC converter provides fast transient response. The adjustable switching frequency (f_SW) (up to 2.75MHz) in continuous conduction mode (CCM) greatly reduces the number of external inductors and capacitors. The output voltage (V_OUT) can be adjusted via the I²C bus or preset via the multiple-time programmable (MTP) memory. The power-on/off sequence can also be configured via the MTP, or it can be controlled via the I²C.

Full protection features include under-voltage lockout (UVLO) protection, over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown. The MP5479 requires a minimal number of standard external components, and is available in a space-saving QFN-26 (3.5mmx4.5mm) package with wettable flanks.

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

Active Part Numbers:

MP5479GRM-xxxx-Z MP5479GRM-0003-Z MP5479GRM-0000-Z

Evaluation Tools

EVKT-USBI2C-02 Evaluation Kit Communication Interface Device USB to I²C/PMBus, included with product evaluation kit or can be purchased separately.

The EVKT-USBI2C-02 is included with product evaluation kits, or it can be purchased separately. EVKT-USBI2C-02 provides the communication interface for USB to I2C or USB to PMBus. It is designed to work with MPS I2C and PMBus products, and Virtual Bench Pro, and I2C GUI tools. USB driver will install automatically or download directly.

The EVKT-USBI2C-02 kit includes: