Super-Small Package VFM Control Step-up Switching Regulator

■ General Description

The 2220 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The 2220 switches at 1.4MHz and allows the use of tiny, low cost capacitors and inductors. Internal soft-start results in small inrush current and extends battery life.

The 2220 features automatic shifting to pulse frequency modulation mode at light loads. The 2220 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload.

■ Package

 SOT-23-6L

■ Features

 Integrated 80mΩ Power MOSFET

2V to 24V Input Voltage

■ Typical Application Circuit

1.4MHz Fixed Switching Frequency

Internal 4A Switch Current Limit

Adjustable Output Voltage

Internal Compensation

Up to 24V Output Voltage

Automatic Pulse Frequency Modulation Mode

at Light Loads

up to 93% Efficiency

■ Applications

Battery-Powered Equipment 

Set-Top Boxed

LCD Bais Supply

DSL and Cable Modems and Routers 

Networking cards powered from PCI or PCI express slots

■ Typical Application Circuit

■ Ordering Information

■ Pin Configuration

■ Pin Configuration

1 Represents the feedback voltage

2 Represents the package types

3 Represents the technological processes change

0-9，A-Z; 0-9，A-Z mirror writing，repeated（G，I，J，O，Q，W exception）

 ① ②③④⑤⑥ Represents the assembly lot No.

■ Function Block Diagram

■ Absolute Maximum Ratings

Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions.

■ Electrical Characteristics                                                                                                

■ Typical Performance Characteristics

■ Package Information 

■ SOT-23-6L