1FEATURES
• Programmable FET Power Limit
• External N-Channel FET Gate Drive
• Programmable Fault Timer
• Open Drain Power Good Output
• I2C monitoring of Current, Voltage and Power
• High Accuracy Current Monitoring
(1% over temperature)
• Dynamic Calibration
• 9-V to 26-V Input Range

APPLICATIONS
• Servers
• Hard Drives
• Storage Networks
• Base Stations

DESCRIPTION
The TPS2480/81 are designed to minimize inrush into
applications and protect both the load and the FET
from over-current or short circuit events. They control
an external N-channel MOSFET switch and provide
accurate voltage, current, and power monitoring using
a configurable 12 bit A/D converter via an I2C
interface. The independently adjustable power limit
and current limit ensure that the external MOSFET
operates within the FET's Safe Operating Area
(SOA).
The flexible design includes a Power Good output
which can be used for sequencing as well as load
fault indication. An external timer capacitor can set
the fault time to help immunize the system from
nuisance shutdowns during brief transient events.
The monitoring circuitry incorporates a high accuracy
A/D converter which can be configured from a 9 to 13
bit converter. The internal gain of the A/D can be
configured to scale the current, voltage and power
readings to the needs of the application. An additional
multiplying register calculates power in Watts. The
I2C interface uses multi-level addressing to allow up
to 16 programmable addresses.