TPS2049D集成电路（IC）的配电开关负载驱动器规格书PDF中文资料

1FEATURES

· 100-mA Continuous Current

· 600-mΩ High-Side MOSFET

· Thermal and Short-Circuit Protection

· Operating Range: 2.7 V to 5.5 V

· 0.6-ms Typical Rise Time

· Undervoltage Lockout

· Deglitched Fault Report (OC)

· 43 mA Quiescent Supply Current

· 1-mA Maximum Standby Supply Current

· SOIC-8 Package

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

· 2 mS Response Time to Short Circuit

DESCRIPTION

The TPS2049 power-distribution switch is intended for applications where heavy capacitive loads and short

circuits are likely to be encountered. This device incorporates a 600-mΩ N-channel MOSFET power switch for

power-distribution systems that require only one power distribution path. The 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 2.7V.

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 (OC) 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 the switch remains off

until valid input voltage is present. This power-distribution switch is designed to set current limit at 150mA

typically.