DESCRIPTION
The MP5424 is a complete power management
solution that integrates four high-efficiency stepdown DC/DC converters, three low-dropout
(LDO) regulators, one load switch, and a flexible
logic interface.
Constant-on-time (COT) control in the DC/DC
converter provides fast transient response. The
1.1MHz default switching frequency (fSW) during
continuous conduction mode (CCM) greatly
reduces the external inductance and
capacitance. Full protection features include
under-voltage lockout (UVLO) protection, overcurrent protection (OCP), over-voltage
protection (OVP), and thermal shutdown.
The output voltage (VOUT) can be adjusted via the
I
2C bus or preset by the multiple-time
programmable (MTP) interface. The startup/shutdown sequence can also be configured
via the MTP and controlled via the I
2C bus.
The MP5424 requires a minimal number of
external components, and is available in a small
QFN-26 (3.5mmx4.5mm) package.

FEATURES
• High-Efficiency Step-Down Converters:
o Buck 1: 4.5A DC/DC Converter
o Buck 2: 2.5A DC/DC Converter
o Buck 3: 4.5A DC/DC Converter
o Buck 4: 2A DC/DC Converter
o Buck 1 and Buck 3 Can Work in Parallel
o Buck 2 and Buck 4 Can Work in Parallel
o 2.7V to 5.5V Operating VIN Range
o Buck 1, Buck 2, and Buck 3 Selectable
VOUT Range: 0.4V to 2.2V/7.4mV Step or
0.4V to 3.58V VOUT/12.5mV Step
o Buck 4 VOUT Range: 0.4V to 3.58V
VOUT/12.5mV Step
o Adjustable Switching Frequency (fSW)
o Adjustable Soft-Start Time (tSS)
o Adjustable Phase Delay
o Configurable Forced PWM (FPWM)
Mode or Auto-PFM/PWM Mode
o Output OCP and OVP
• Low-Dropout (LDO) Regulators:
o Three 300mA, Low-Noise LDOs
o Two Separate Input Power Supplies
o 50mV Dropout at 300mA Load
• Load Switch:
o 2.7V to 5.5V/3A Load Switch
o 50mΩ On Resistance at VIN = 5V
o On/Off Control via the I
2C and
Programmable Sequence
o Configurable Output Discharge Function
via the I
2C (Default: On)
• System:
o I
2C Bus and User-Programmable MTP
o Two-Time Programmable MTP (1)
o Start-Up/Shutdown Control
o Enable Pin (EN1) for Sleep Mode Entry
and Recovery Control
o Start-Up Reset Output
o Flexible Start-Up/Shutdown Sequence
via MTP (0.5ms, 2ms, 8ms, or 16ms
Selectable Time Slot)
o Available in a QFN-26 (3.5mmx4.5mm)
Package

APPLICATIONS
• General Consumer
• Camera Modules
• 3.3V/5V Powered Systems
• Space-Limited Systems