1.5-V to 40-V, 500-mA buck-boost converter with 5-V fixed output voltage, AEC-Q100 qualified


Product details


Topology Buck-Boost Vin (Min) (V) 1.5 Vin (Max) (V) 40 Vout (Max) (V) 5 Vout (Min) (V) 5 Duty cycle (Max) (%) 99 Features Enable, Light Load Efficiency, Power Good, Synchronous Rectification Switch current limit (Typ) (A) 1.5 Switching frequency (Min) (kHz) 330 Switching frequency (Max) (kHz) 550 Iq (Typ) (mA) 0.1 Rating Automotive Iout (Max) (A) 1 Operating temperature range (C) -40 to 125 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to
      +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 1B
    • Device CDM ESD Classification Level C4B
  • Switched-Mode Regulator
    • 5 V ±2%, Normal Mode
    • 5 V ±3%, Low-Power or Crossover Mode
  • Switching Frequency, 440 kHz (Typical)
  • Input Operating Range, 1.5 V to 40 V, (Vdriver)
    • 500-mA Load-Current Capability
    • 200-mA Load-Current Capability Down to 2-V
      Input (Vdriver)
    • 120-mA Load-Current Capability Down to
      1.5-V Input (Vdriver)
  • Enable Function
  • Low-Power Operation Mode
  • Switched 5-V Regulated Output on 5Vg With
    Current Limit
  • Programmable Slew Rate and Frequency
    Modulation for EMI Consideration
  • Reset Function With Deglitch Timer and
    Programmable Delay
  • Alarm Function for Undervoltage Detection and
  • Thermally Enhanced Package for Efficient Heat
open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)


The TPS55065 is a switched-mode regulator with integrated switches for voltage-mode control. With the aid of external components (LC combination), the device regulates the output to 5 V ±3% for a wide input-voltage range.

The TPS55065 device offers a reset function to detect and indicate when the 5-V output rail is outside of the specified tolerance. This reset delay is programmable using an external timing capacitor on the REST terminal. Additionally, an alarm (AOUT) feature is activated when the input supply rail Vdriver is below a prescaled specified value (set by the AIN terminal).

The TPS55065 device has a frequency-modulation scheme to minimize EMI. The clock modulator permits a modulation of the switching frequency to reduce interference energy in the frequency band.

The 5-Vg output is a switched 5-V regulated output with internal current limiting to prevent assertion of RESET when powering a capacitive load on the supply line. This function is controlled by the 5Vg_ENABLE terminal. If there is a short to ground on this output (5Vg output), the output self-protects by operating in a chopping mode. This does, however, increase the output ripple voltage on VOUT during this fault condition.

open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet TPS55065-Q1 Buck and Boost Switched-Mode Regulator datasheet (Rev. A) Jan. 16, 2015
User guide TPS55065EVM User's Guide Nov. 06, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The Texas Instruments TPS55065EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS55065 Switch Mode Power Supply - Buck / Boost Regulator. The EVM contains one DC/DC converter.

  • Switch-Mode Regulator
    • 5V+/-2%, Normal Mode
    • 5V+/-3%, Low-Power or Crossover Mode
  • Switching Frequency, 440 kHz (typical)
  • Input Operating Range, 1.5V to 40V, (Vdriver)
    • 500-mA Load-Current Capability
    • 200-mA Load-Current Capability Down to 2V Input (Vdriver)
    • 120-mA Load-Current Capability Down to 1.5V Input (...)

Design tools & simulation

SLIM315A.ZIP (56 KB) - PSpice Model
SLIM335.TSC (602 KB) - TINA-TI Reference Design
SLIM336.ZIP (44 KB) - TINA-TI Spice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​