18.5-V output, 4.8-A synchronous boost converter with load disconnect


Product details


Vin (Min) (V) 2.3 Vin (Max) (V) 14 Vout (Min) (V) 4 Vout (Max) (V) 18.5 Switch current limit (Typ) (A) 4.8 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Iq (Typ) (mA) 0.35 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Load Disconnect, Power Good, Spread Spectrum, Synchronous Rectification, UVLO Fixed Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 125 Rating Automotive open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Boost converters (integrated switch)


  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Function Safety-Capable
  • Flexible input and output operation range
    • Input voltage range: 2.3 V to 14 V
    • Programmable output voltage range: 4.0 V to 18.5 V
    • 5 V, 5.25 V, 5.5 V fixed output options
    • Programmable peak current limit: 1 A to 4.8 A
  • Avoid AM band interference and crosstalk
    • Dynamically programmable switching frequency: 200 kHz to 2.2 MHz
    • Spread spectrum frequency modulation
    • Optional clock synchronization
  • Minimize solution size for space constraint applications
    • Integrated LS/HS/ISO FET: RDS(ON) 50 mΩ/50 mΩ/100 mΩ
    • Support up to 2.2 MHz with small L-C
  • Minimized light load and idle state current consumption
    • 25-µA Quiescent current into VIN pin
    • 0.5-µA Shutdown current into VIN pin
    • Selectable auto PFM and forced PWM mode
    • True load disconnect during shutdown or fault conditions
  • Integrated protection features
    • Support VIN close to VOUT operation
    • Input undervoltage lockout and output overvoltage protection
    • Hiccup output short circuit protection
    • Power good indicator
    • Thermal shutdown protection at 165°C
  • Higher than 90% efficiency under 0.8-A load from 3.3-V to 9-V conversion

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open-in-new Find other Boost converters (integrated switch)


The TPS61378-Q1 is a fully-integrated synchronous boost converter with load disconnect function integrated. The input voltage covers from 2.3 V to 14 V, while the maximal output votlage up to 18.5 V. The switching current limit is programmable from 1 A to 4.8 A. It consumes 25 uA quiescent current from Vin.

The TPS61378-Q1 employs the peak current mode control with the switching frequency programmable from 200 kHz to 2.2 MHz. The device works in fixed frequency PWM operation in medium to heavy load. There are two optional modes in light load by configuring the MODE pin: Auto PFM mode and Forced PWM to balance the efficiency and noise immunity in light load. The switching frequency can be synchronized to an external clock. The TPS61378-Q1 uses the spread spectrum of the internal clock for more EMI friendly at FPWM mode. In addition, there is an internal soft-start time to limit the inrush current.

The TPS61378-Q1 has various fixed output voltage versions to save the external feedback resistor. It supports the external loop compensation so that the stability and transient response could be optimized at wider Vout/Vin range. It also integrates robust protection features including the output short protection, output over voltage protection and thermal shutdown protection. The TPS61378-Q1 is available in a 3-mm x 3-mm 16-pin QFN package with wettable flank.

open-in-new Find other Boost converters (integrated switch)

Technical documentation

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Type Title Date
* Datasheet TPS61378-Q1 25-µA Quiescent Current Synchronous Boost Converter with Load Disconnect datasheet (Rev. A) Oct. 01, 2020
Functional safety information TPS61378-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. C) Oct. 20, 2020
User guide TPS61378Q1EVM-060 Evaluation Module (Rev. A) Sep. 11, 2020

Design & development

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Hardware development

TPS61378QRTE evaluation module

The TPS61378Q1EVM-060 allows you to evaluate the TPS61378-Q1 fully-integrated synchronous boost converter with optional load disconnect function. The device is suitable as a post-boost for automotive applications, boosting from a regulated 3.3-V or 5-V rail with a programmable current limit up to (...)

  • Qualified for automotive applications
  • EVM is optimized for 5-V typical (3.3-V to 6.5-V) input voltage and 9-V output voltage applications
  • Supports 1.7-A load at 5-V input and 1.1-A load at 3.3-V input
  • 2.2-MHz switching frequency with spread spectrum

Design tools & simulation

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WQFN (RTE) 16 View options

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