TPS2051BDGN

The TPS20xxB power-distribution switches are
intended for applications where heavy capacitive
loads and short circuits are likely to be encountered.
These devices incorporates 70mΩ 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 powerswitch 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 ( 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 powerdistribution switch is designed to set current limit at
1A (typical).