1 Features
• Radiation Hardened
– SEL, SEB, and SEGR immune up to
LET = 43 MeV-cm2/mg
– SET and SEFI characterized up to
LET = 43 MeV-cm2/mg
– TID assured for every wafer lot up to
20 krad(Si)
– TID characterized up to 30 krad(Si)
• Space Enhanced Plastic
– Controlled baseline
– Au bondwire and NiPdAu lead finish
– Enhanced mold compound for low outgassing
– One fabrication, assembly and test site
– Extended product life cycle
– Extended product change notification
– Product traceability
• Wide voltage conversion range:
– tON-MIN = 60 ns (typical)
– tOFF-MIN = 70 ns (typical)
• Low MOSFET ON-resistance:
– RDS_ON_HS = 53 mΩ (typical)
– RDS_ON_LS = 31 mΩ (typical)
• Adjustable frequency range: 350 kHz to 2.2 MHz
• Synchronizable to external clock
• Internal compensation
• Power-good flag
• Precision enable to program system UVLO
• Fixed or adjustable soft-start time
• Cycle-by-cycle current limiting
• Short-circuit protection with hiccup mode
• Thermal shutdown protection

2 Applications
• Space satellite point of load supply for FPGAs,
microcontrollers, data converters and ASICs
• Communications payload
• Command and data handling
• Optical imaging payload
• Radar imaging payload
• Laser communications payload
• Navigations payload
• Scientific exploration payload

3 Description
The TPS7H4010-SEP is an easy-to-use synchronous
step-down DC/DC converter capable of driving up
to 6 A of load current from a supply voltage
ranging from 3.5 V to 32 V. The TPS7H4010-SEP
provides exceptional efficiency and output accuracy
in a very small solution size. Peak current-mode
control is employed. Additional features such as
adjustable switching frequency, synchronization to
an external clock, FPWM option, power-good flag,
precision enable, adjustable soft start, and tracking
provide both flexible and easy-to-use solutions for
a wide range of applications. Automatic frequency
foldback at light load and optional external bias
improve efficiency over the entire load range. The
device requires few external components and has a
pinout designed for simple PCB layout with optimal
EMI and thermal performance. Protection features
include thermal shutdown, input undervoltage lockout,
cycle-by-cycle current limiting, and hiccup short-circuit
protection.