Description

The SLM2169 is a CMOS step-up switching regulator controller which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, and a PWM / PFM switching control circuit.

With an external low-ON-resistance N-channel Power MOS, this product is ideal for applications requiring high efficiency and a high output current.

The SLM2169 efficiently works on voltage’s condition of large I/O difference due to the PWM control circuit linearly varies the duty ratio to 90%.During light-load, the SLM2169 switches its operation to the PFM control by the PWM / PFM switching control circuit in order to prevent efficiency decline due to the IC operating current.Ceramic capacitors can be used for output capacitor. Small package SOT-23-5 enables high-density mounting.

Features

• ■Input voltage range 1.8 V~5.5V
• ■Oscillation frequency 1.2MHz
• ■Reference voltage 0.6V±2.0%
• ■Soft start function 10ms typ
• ■Low current consumption 50μA typ at switching off
• ■Duty ratio Built-in PWM / PFM switching control circuit 20%~90%
• ■Shut-down function Current consumption 1.0 μA max at shutdown
• ■External component Inductor, diode,capacitor, transistor
• ■UVLO function 1.7V typ

Absolute Maximum Ratings

• ■VDD: -0.3V~6V
• ■FB: -0.3V~VDD+0.3V
• ■EXT： -0.3V~VDD+0.3V
• ■ON/OFF： -0.3V~VDD+0.3V
• ■Maximum Junction Temperature: 145℃
• ■Operating Temperature Range: -40℃ ~85℃
• ■Storage Temperature Range: -40℃~125℃
• ■Lead Temperature (Soldering, 10 sec) 260℃

Typical Application

Datasheet

SLM2169.pdf