1 Features

1? Three Highly Efficient Programmable Buck

Regulators

– Buck Regulator Outputs:

– Buck 1: 1.1 V to 3.6 V; 1.3 A

– Buck 2: 1.1 V to 3.6 V; 400 mA

– Buck 3: 0.7 V to 1.335 V; 600 mA

– ±3% Feedback Voltage Accuracy

– Up to 95% Efficient Buck Regulators

– 2MHz Switching Frequency for Smaller

Inductor Size

– Integrated FETs with Low RDSON

– Bucks Operate With Their Phases Shifted to

Reduce the Input Current Ripple and Capacitor

Size

– Programmable Output Voltage via the SPI?

Interface

– Overvoltage and Undervoltage Lockout

– Automatic Internal Soft Start With Power-On

Reset

– Current Overload and Thermal Shutdown

Protection

– Bypass Mode Available on Bucks 1 and 2

– PFM Mode for Low-Load, High-Efficiency

Operation

? Low-Dropout LDO 3.2 V, 100 mA

? SPI-Programmable Interrupt Comparator (2 V to 4

V)

? Alternate Buck VOUT Selectable via H/L Logic Pins

? RESET, STANDBY Pins

2 Applications

Solid-State Drives

3 Description

The LM10506 is an advanced PMU containing three

configurable, high-efficiency buck regulators for

supplying variable voltages. The device is ideal for

supporting ASIC and SOC designs for Solid-State

and Flash drives.

The LM10506 operates cooperatively with ASIC to

optimize the supply voltage for low-power conditions

and Power Saving modes via the SPI interface. It

also supports a 100-mA LDO and a programmable

Interrupt Comparator.