TPS2046BDR.A中文资料德州仪器数据手册PDF规格书

FEATURES

· 70-mΩ High-Side MOSFET

· 250-mA Continuous Current

· Thermal and Short-Circuit Protection

· Accurate Current Limit (0.3 A min, 0.7 A max)

· Operating Range: 2.7 V to 5.5 V

· 0.6-ms Typical Rise Time

· Undervoltage Lockout

· Deglitched Fault Report (OC)

· No OC Glitch During Power Up

· Maximum Standby Supply Current:

1-μA (Single and Dual) or 2-μA (Triple)

· Bidirectional Switch

· Ambient Temperature Range: –40°C to 85°C

· ESD Protection

· UL Pending

APPLICATIONS

· Heavy Capacitive Loads

· Short-Circuit Protections

DESCRIPTION

The TPS204xB/TPS2055B power-distribution switches are intended for applications where heavy capacitive

loads and short circuits are likely to be encountered. These devices incorporate 70-mΩ N-channel MOSFET

power switches for power-distribution systems that require multiple power switches in a single package. Each

switch is controlled by a logic-enable input. Gate drive is provided by an internal charge pump designed to

control 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.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current

to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When

continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction

temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal

shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains

off until valid input voltage is present. This power-distribution switch is designed to set current limit at 0.5 A

typically.