DESCRIPTION

The MP5496 is a complete power management

solution that integrates four high-efficiency, stepdown DC/DC converters, five low-dropout (LDO)

regulators, and a flexible logic interface.

A DC/DC converter with constant-on-time (COT)

control provides fast transient response. The

default 1.5MHz fixed switching frequency during

continuous conduction mode (CCM) greatly

reduces the external inductor and capacitor

values. Full protection features include undervoltage lockout (UVLO), over-current protection

(OCP), and thermal shutdown.

The output voltage is adjustable through the I2C

interface, or can be preset by the one-time

programmable (OTP) function. The start-up and

shutdown sequences can be configured via the

OTP.

By using the I

2C or OTP, the MP5496 can be

utilized to configure the buck and LDO output

voltages, mode, buck 1 and buck 3 current limits,

and the enable function of all the buck converters

and LDOs (ENBUCK/LDO).

When using only the I

2C interface, the MP5496

allows users to configure the buck 2 and buck 4

current limits, slew rate (DVS slew rate),

discharge (DISCHG), system enable (SYSEN),

and software reset (SFRST). Status and ID2

registers can also be read via the I

2C.

Additional features, such as AUTOON,

frequency, power-on delay, RST delay, pushbutton time, LDORTC output voltage, OTP

version, and the I

2C slave address can only be

configured via the OTP.

The MP5496 requires a minimal number of

external components, and is available in a

space-saving QFN-28 (4mmx4mm) package.

FEATURES

Four High-Efficiency Step-Down Converters

 Buck 1: 4.5A DC/DC Converter

 Buck 2: 2.5A DC/DC Converter

 Buck 3: 4A DC/DC Converter

 Buck 4: 2A DC/DC Converter

 0.6V to 2.1875V/12.5mV Step VOUT Range

 2.8V to 5.5V Operating Input Range

 Adjustable Switching Frequency

 Configurable Forced PWM, Auto-PFM/PWM

Mode

 Hiccup Over-Current Protection (OCP)

Five Low-Dropout Regulators

 One RTC-Dedicated LDO

 Four Low-Noise LDOs

 Two Separate Input Power Supplies

 100mV Dropout at 300mA Load

System

 I2C Bus and OTP

 Power-On/Off Button

 Power-On Reset Output

 Flexible Power-On/Off Sequencing via OTP

 Flexible DC/DC, LDO On/Off via OTP

APPLICATIONS

 Cable Modems, Set-Top Boxes

 Televisions

 Wi-Fi Routers/Access Points

 PoS Machines

 SSDs

 IP Cameras