Overview: ą TPS2306 DUAL SEQUENCING HOT SWAP POWER MANAGER D Wide Input Operating Range (2.75 V to
13.6 V)
D Controls Ramp-Up Sequence and Slope,
and Ramp-Down Sequence
D Controls Inrush Current D Precise Linear Current Amplifier for High
Efficiency and Low Voltage Drop
D Programmable Overcurrent Threshold D Programmable Soft-Start Capability and
Fault Timer
D Internal Charge Pump Drives Low-Cost
External NMOS Devices
D Cascadable for Three or More Supplies D Fault Indicator Output D Direct-drive of Bus Switch D Shutdown Control with Low-Current Sleep
Mode (40 µA)
D Input Undervoltage Lockout D 16-pin SOIC package SLVS368 − APRIL 2001 DW PACKAGE TOP VIEW IMAX1 UP1
ENBL IREF
CT GND UP2 IMAX2 1 2 3 4 5 6 7 8 16 VCC/CS1 15 DOWN1 14 GATE1 13 FAULT 12 CPUMP 11 GATE2 10 DOWN2
9 CS2 The TPS2306 Hot Swap Power Manager (HSPM) IC provides hot-swap control, fault handling and power supply sequencing of two positive voltage supplies. The TPS2306 operates over a wide supply range allowing single part inventory for a variety of output voltages.
During the transient period of a live insertion or hot-swap event, the TPS2306 actively limits the inrush current to the plug-in module. An on-chip linear current amplifier (LCA) provides closed-loop control of the current sourced to the load circuitry on the module. Subsequently, during normal steady-state loading conditions and in conjunction with an internal high-voltage charge pump, the LCA provides direct gate drive to fully enhance the external NMOS pass devices. In addition, the < 4-mV input offset voltage of the LCA allows for the use of low-value sense resistors.
