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reference designTPS7H4012

Texas Instruments TPS7H4012

Radiation-tolerant, 4.5V to 14V input 6A synchronous step-down converter

Overview

TopologyBuck Converter
Input voltage4.5-14 V
Switching frequency100-1000 kHz
Output 13.3 V / 6 A
IC revisionA

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.

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

Typical applications

  • Satellite electrical power systems (EPS), Space satellite point of load supply
  • Radar imaging payload
  • Radiation hardened power supplies
  • Communications payload

More information

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Data­sheet
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Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
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74439346022
SPECWE-XHMI SMT Power Inductor, 2.2 µH, 15.75 A
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-XHMI SMT Power Inductor
Inductance2.2 µH
Performance Rated Current15.75 A
Saturation Current @ 30%19.5 A
DC Resistance5.58 mΩ
DC Resistance6.69 mΩ
Self Resonant Frequency37 MHz
MountSMT 
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