Features
70mΩ(typ) High-Side MOSFET
2.31A Maximum Continuous Load Current
±10% Current-Limit Accuracy at 1A typically
Adjustable Current Limit: 400mA–2.57A (typ)
Operating Range: 4.75V to 5.5V
70μA(typ) Quiescent Current
2μs Fast Over current Response Typically
Reverse Input-Output Voltage Protection
Built-in 450Ω(typ) output discharge resistor
6kV HBM ESD Protection
2ms(typical) soft start time
Green package: SOT23-6 and DFN2*2-6 is pin
compatible
Application
USB Ports & USB Hubs
Digital TV and
Set-Top Boxes
VOIP Phones
Short-Circuit Protections
Descriptions
The DIO7552B/7553B is power distribution
switches that intended for applications where
precision current limiting is required or heavy
capacitive loads and short circuits are
encountered and provide up to 2.31A of
continuous load current.
A programmable current-limit threshold is offered
between 400mA and 2.57A (typ) via an external
resistor. Current-limit accuracy is ±10% @1A. The
power-switch rise and fall times are controlled to
minimize current surges during turn on/off. A
constant-current mode is used when the output
load exceeds the current-limit threshold.
The DIO7552B/7553B limits the output current to a
safe level by using a constant-current mode when
the output load exceeds the current-limit
threshold. An internal reverse voltage comparator
disables the power switch when the output
voltage is driven higher than the input to protect
devices on the input side.