1 Features

• Total Ionizing Dose radiation characterized:

– Radiation hardness assurance (RHA)

availability of 100krad(Si) or 50krad(Si)

• Single-Event Effects (SEE) Characterized

– Single-event latch-up (SEL), single-event

burnout (SEB), and single-event gate rupture

(SEGR) immune to linear energy transfer (LET)

= 75MeV-cm2/mg

– Single-event functional interrupt (SEFI)

characterized to LET = 75MeV-cm2/mg

– Single-event transient (SET) characterized to

LET = 75MeV-cm2/mg

• Wide VIN range: 2.25V to 14V

• 2A maximum output current

• ±1.5% accuracy VIN > 3V over load, and

temperature

• ±1.8% accuracy VIN < 3V over load, and

temperature

• Soft start (SS) control through an external

capacitor

• Open-drain power good (PG) output for power

sequencing

• Programmable current limit through an external

resistor (CL)

• Optional external control loop compensation

utilizing the STAB pin

• Excellent load and line transient response

• Plastic packages out gas tested per ASTM E595

• Military (–55°C to 125°C) temperature range

2 Applications

• Satellite electrical power system (EPS)

• Clean analog supply requirements

• Command and data handling (C&DH)

• Optical imaging payload

• Radar imaging payload

3 Description

The TPS7H1121 is a radiation-hardened, low dropout

linear regulator (LDO) which operates over a wide

input voltage range and is optimized for powering

devices in a space environment. It is capable of

sourcing up to 2A over a 2.25V to 14V input.

The device offers excellent stability and features a

programmable current limit with a wide adjustment

range. To support the complex power requirements

of FPGAs, DSPs, and micro-controllers, the

TPS7H1121 provides enable on and off functionality,

programmable soft start, and a power good opendrain

output.