1 Features

• Total ionizing dose (TID) characterized

– Radiation hardness assurance (RHA)

availability of up to 100krad(Si)

• Single-Event Effects (SEE) characterized

– Single-event latchup (SEL), single-event

burnout (SEB), and single-event gate rupture

(SEGR) immune up to linear energy transfer

(LET) = 75MeV-cm2/mg

– Single-event functional interrupt (SEFI) and

single-event transient (SET) characterized up to

LET = 75MeV-cm2/mg

• Input voltage range from 4.5V to 14V

• 6A (TPS7H4012) or 3A (TPS7H4013) maximum

output current

• High efficiency (typical values for VIN = 12V,

VOUT = 3.3V, fSW = 500kHz)

– 88% at 1A

– 92% at 3A

– 91% at 6A

• Integrated 33mΩ (HS) and 27mΩ (LS) MOSFETs

(typ at 12V)

• Flexible switching frequency options:

– 100kHz to 1MHz, accurate (±15% or better),

adjustable internal oscillator

– 100kHz to 1MHz external sync capability

• 0.6V ± 0.83% voltage reference over line,

temperature, and radiation

• Supports start-up into prebiased outputs

• Adjustable slope compensation and soft-start

• Adjustable input enable and power-good output for

power sequencing

• Power-good output monitor for undervoltage and

overvoltage

• Supports inverting buck-boost topology

• Plastic packages outgas tested per ASTM E595

• Available in military (–55°C to 125°C) temperature

range

2 Applications

• Space satellite point of load supply

• Satellite electrical power systems (EPS)

• Communications payload

• Radar imaging payload

• Radiation hardened power supplies

3 Description

The TPS7H401x devices are 14V synchronous

buck converters optimized for use in a space

environment. The TPS7H4012 is a 6A device and the

TPS7H4013 is a 3A device. The peak current mode

converter obtains high efficiency with good transient

performance and reduced component count.

The wide voltage range of the TPS7H401x enables

it to be used as a point of load regulator to convert

directly from a 12V or 5V rail. The output voltage

start-up ramp is controlled by the SS_TR pin. Power

sequencing is possible with the EN and PWRGD pins.

Additionally, various features are included such as

an optimized current limit for each device, a flexible

switching frequency, and configurable compensation.