1 Features
1• 5962-10221:
– Radiation hardened up to TID 100 krad(Si)
– ELDRS free 100 krad(Si) – 10 mrad(Si)/s
– Single lhup (SEL) Immune to
LET = 75 MeV-cm2/mg
– SEB and SEGR immune to 75 MeV-cm2/mg,
SOA Curve Available
– SET/SEFI Cross-section plot available
• peak efficiency: 96.6% (VO = 3.3 V)
• Integrated 58-mΩ/50-mΩ MOSFETs
• Power rail: 3 to 7 V on VIN
• 6-A Maximum output current
• Flexible switching frequency options:
– 100-kHz to 1-MHz Adjustable internal oscillator
– External sync capability: 100 kHz to 1 MHz
– Sync pin can be configured as a 500-kHz
output for master/slave applications
• 0.804-V ±1.5% Voltage reference
overtemperature, radiation, and line and load
regulation
• Monotonic start-up into prebiased outputs
• Adjustable soft start through external capacitor
• Input enable and power-good output for power
sequencing
• Power good output monitor for undervoltage and
overvoltage
• Adjustable input undervoltage lockout (UVLO)
• 20-Pin Ultra-small, thermally-enhanced ceramic
flatpack package (hkh) for space applications
2 Applications
• Space satellite point of load supply for FPGAs,
microcontrollers, data converters and ASICs
• Space satellite payloads
• Radiation hardened applications
• Available in military (–55°C to 125°C) temperature
range
• Engineering evaluation (/EM) Samples are
available
3 Description
The TPS50601A-SP is a radiation hardened, 7-V, 6-A
synchronous step-down converter, which is optimized
for small designs through high efficiency and
integrating the high-side and low-side MOSFETs.
Further space savings are achieved through current
mode control, which reduces component count, and a
high switching frequency, reducing the inductor's
footprint. The devices are offered in an ultra small,
thermally enhanced 20-pin ceramic flatpack package.
The output voltage startup 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 also possible by correctly configuring
the enable and the open drain power good pins. In
addition, the TPS50601A-SP can be configured in
master-slave mode to provide up to 12-A of output
current.
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 limit which
prevents current runaway. There is also a low-side
sinking current limit which turns off the low-side
MOSFET to prevent excessive reverse current.
Thermal shutdown disables the part when die
temperature exceeds thermal shutdown temperature.