充气机又叫打气机、打气泵、充气泵。通过马达的运转来工作。充气机是马达运转，抽气时，连通器的阀门被大气的气压冲开，气体进入气筒，而向轮胎中打气时，阀门又被气筒内的气压关闭，气体就进入了轮胎中。 也算是使用了大气压的原理来同汽车、皮球、橡皮船充气。

GENERAL DESCRIPTION

The SLB628D is a constant frequency, 6-pin 

SOT23 current mode step-up converter intended for 

small, low power applications. The SLB628D

switches at 1.2MHz and allows the use of tiny, low 

cost capacitors and inductors 2mm or less in height. 

Internal soft-start results in small inrush current and 

extends battery life.

The SLB628D features automatic shifting to pulse 

frequency modulation mode at light loads. The 

SLB628D includes under-voltage lockout, current 

limiting, and thermal overload protection to prevent 

damage in the event of an output overload. The 

SLB628D is available in a small 6-pin SOT-23 

package.

FEATURES

⚫ Integrated 80mΩ Power MOSFET 

⚫ 2.2V to 16V Input Voltage

⚫ 1.2MHz Fixed Switching Frequency

⚫ Adjustable Over Current Protection: 0.5A 

~2.5A

⚫ Internal 2.5A Switch Current Limit(OC pin 

floating)

⚫ Adjustable Output Voltage 

⚫ Internal Compensation 

⚫ Over Voltage Protection

⚫ Up to 20V Output Voltage 

⚫ Automatic Pulse Frequency Modulation Mode 

at Light Loads

⚫ up to 93% Efficiency 

⚫ Available in a 6-Pin SOT23-6 Package

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