TPS7H4203-SEP
- 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 10V to 38V
- 3A maximum output current
- High efficiency (typical values for PVIN = 28V,
VOUT = 12V, fSW = 250kHz)
- 91.8% at 3A
- Integrated 214mΩ (HS) and 100mΩ (LS) MOSFETs (typ. at TA = 25℃)
- Flexible switching frequency options:
- 100kHz to 500kHz, accurate (±10%), adjustable internal oscillator
- 100kHz to 500kHz external sync capability
- SYNC pin can be configured as an output with 180° out of phase at fSW = 250kHz to parallel 2 devices
- 1V ± 1% voltage reference over line, temperature, and radiation
- Monotonic 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
- Overvoltage protection
- Supports inverting buck-boost topology
- Plastic packages outgas tested per ASTM E595
- Available in military (–55°C to 125°C) temperature range
The TPS7H4203 is a 10V to 38V, 3A synchronous buck converter optimized for use in a space environment. The peak current mode converter offers high efficiency, excellent transient performance, and a lower component count.
The TPS7H4203 wide voltage range allows it to function as a point-of-load regulator, converting power directly from 28V or 12V rails. The SS_TR pin controls the output voltage startup ramp, while the EN and PWRGD pins enable power sequencing capabilities.
Two devices can be configured in parallel without an external clock for increased current capabilities. Additionally, the device includes configurable loop compensation and slope compensation. Internal protection for overload, overvoltage, and over temperature are also incorporated.