The TPS7H4003-SEP is a radiation-tolerant, 7-V,
18-A synchronous buck converter with integrated low-resistance high-side and
low-side MOSFETs in a thermally enhanced 34-pin ceramic flatpack package. High
efficiency and reduced component count are achieved through current mode
control.
The output voltage start-up ramp is controlled by
the SS/TR pin which allows operation as either a stand alone power supply or in
tracking situations. Power sequencing is possible by correctly configuring the
enable and the power good pins. The TPS7H4003-SEP can be configured in
primary-secondary mode and with the SYNC2 pin, four devices can be configured in
parallel without an external clock.
Cycle-by-cycle current limiting on the high-side
FET protects the device in overload situations and is enhanced by a low-side
sourcing current protection which prevents current runaway. There is also a low-side
sinking current protection which turns off the low-side MOSFET to prevent excessive
reverse current. Thermal shutdown disables the part when die temperature exceeds
thermal limit.
The TPS7H4003-SEP is a radiation-tolerant, 7-V,
18-A synchronous buck converter with integrated low-resistance high-side and
low-side MOSFETs in a thermally enhanced 34-pin ceramic flatpack package. High
efficiency and reduced component count are achieved through current mode
control.
The output voltage start-up ramp is controlled by
the SS/TR pin which allows operation as either a stand alone power supply or in
tracking situations. Power sequencing is possible by correctly configuring the
enable and the power good pins. The TPS7H4003-SEP can be configured in
primary-secondary mode and with the SYNC2 pin, four devices can be configured in
parallel without an external clock.
Cycle-by-cycle current limiting on the high-side
FET protects the device in overload situations and is enhanced by a low-side
sourcing current protection which prevents current runaway. There is also a low-side
sinking current protection which turns off the low-side MOSFET to prevent excessive
reverse current. Thermal shutdown disables the part when die temperature exceeds
thermal limit.