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. The device 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 microcontrollers, the
TPS7H1121 provides enable on and off functionality,
programmable soft start, and a power good opendrain
output.