MP5477

MP5477

4V to 16V, Power Management IC with Five Buck Converters (6A/3A/3A/2A/2A), One LDO, and Flexible System Settings via the I²C

Description

The MP5477 is a complete power management IC (PMIC) that integrates five high-efficiency, step-down DC/DC converters, one LDO, and a flexible logic interface for memory controller applications.

Constant-on-time (COT) control provides fast transient response. The configurable switching frequency (f_SW, up to 2MHz) reduces the external inductor and capacitor size significantly. It provides automatic pulse-frequency modulation (PFM)/pulse-width modulation (PWM) or forced PWM switching modes, as well as a configurable input/output constant-current (CC) limit.

The MP5477 provides full protection features including over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), configurable soft start (SS), and thermal shutdown.

The output voltage (V_OUT) of the buck converter is adjustable via the I²C bus or preset via the multiple-time programmable (MTP) memory. The two 2A buck rails and two 3A buck rails can work in either independent mode or parallel mode, which can be configured. The current-sharing function is implemented when working in parallel mode. The power-on/-off sequence is also configurable via the MTP.

The MP5477 requires a minimal number of external components, and is available in a space-saving QFN-41 (5mmx5mm) package.

Features & Benefits

Wide 4V to 16V Input Voltage (V_IN) Range
Five High-Efficiency Buck Converters:
- Buck 1: 6A Maximum Output Current (I_OUT), 1.2V Typical Output Voltage (V_{OUT_TYPICAL}), 8A Peak Current
- Buck 2: 2A Maximum I_OUT, 0.9V V_{OUT_TYPICAL}, 4A Peak Current
- Buck 3: 2A Maximum I_OUT, 1.8V V_{OUT_TYPICAL}, 4A Peak Current
- Buck 4: 3A Maximum I_OUT, 0.5V V_{OUT_TYPICAL}, 5A Peak Current
- Buck 5: 3A Maximum I_OUT, 1.05V V_{OUT_TYPICAL}, 5A Peak Current
Buck 2/3 Supports Up to 4A Continuous Current in Dual Phase
Buck 4/5 Supports Up to 6A Continuous Current in Dual Phase
Buck 1/2/3/4/5 Output Voltage (V_OUT) Up to 2.047V in 1mV Steps
Low-Dropout (LDO) Output Up to 3.3V in 2mV Steps
Integrated Bootstrap (BST) Capacitor (C_BST)
Accurate Current Sense and Dedicated Power Disable Feature
Fast Load Transient Response
Low On Resistance (R_DS(ON)) and High Efficiency
Configurable Switching Frequency (f_SW)
I²C-Configurable Forced Pulse-Width Modulation (PWM) or Automatic Pulse-Frequency Modulation (PFM)/PWM Mode
Configurable Slew Rate Control
Adjustable Current Limit via the I²C
System:
- Configurable Multiple-Time Programmable (MTP) Memory
- Accurate V_IN, V_OUT, I_OUT, and Temperature Monitoring via the I²C
- Flexible Power-On/Off Sequence via the MTP
- Configurable Input Current Limit via the MTP
- Open-Drain/Push-Pull Configured GPIO Pins
- Specific I/O Ports (External Enable and External Power Good) to Control External Regulators
Over-Current Protection (OCP), Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), and Thermal Shutdown Protection
Available in a QFN-41 (5mmx5mm) Package