TPS2056D

双电流限制的配电开关 DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

description

The TPS2046 and TPS2056 dual power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely. These devices incorporate in single packages two 135-mΩ N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches. Each switch is controlled by a logic enable compatible with 5-V and 3-V logic. Gate drive is provided by an internal charge pump that controls the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V.

features

• 135-mΩ -Maximum 5-V Input High-Side MOSFET Switch

• 250 mA Continuous Current per Channel

• Independent Short-Circuit and Thermal Protection With Overcurrent Logic Output

• Operating Range . . . 2.7-V to 5.5-V

• Logic-Level Enable Input

• 2.5-ms Typical Rise Time

• Undervoltage Lockout

• 10 µA Maximum Standby Supply Current

• Bidirectional Switch

• Available in 8-pin SOIC and PDIP Packages

• Ambient Temperature Range, –40°C to 85°C

• 2-kV Human-Body-Model, 200-V Machine-Model ESD Protection

typical applications

• Notebook, Desktop and Palmtop PCs

• Monitors, Keyboards, Scanners, and Printers

• Digital Cameras, Phones, and PBXs

• Hot-Insertion Applications