85-VOUT boost converter with current mirror and sample and hold


Product details


Vin (Min) (V) 2.5 Vin (Max) (V) 5.5 Vout (Max) (V) 84 Switch current limit (Typ) (A) 1 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 800 Iq (Typ) (mA) 0.5 Features Enable, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Boost converters (integrated switch)

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


  • Input voltage range: 2.5 V to 5.5 V
  • Output voltage range: up to 85 V
  • R(DS)on of switching FET: 0.9 Ω
  • Switch current limit: 1000 mA
  • Sample window with minimum 400-ns
  • High optical power protection with 0.5-µs response time
  • Switching frequency: 700 kHz
  • Quiescent current: 110 µA from VIN, 340 µA from VOUT, 140 µA from AVCC
  • Soft-start time: 4.8 ms
  • Package: 3 mm × 3 mm × 0.75 mm QFN

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The TPS61390 is a 700-kHz pulse-width modulating (PWM) step-up converter with an 85-V switch FET with an input ranging from 2.5 V to 5.5 V. The switching peak current is up to 1000 mA. The TPS61390 includes accurate current mirror with two gain options selectable (1 : 5 or 4 : 5).

Additionally, the TPS61390 integrates a sample-and-hold circuitry for the burst-mode optical receiver applications to capture the current flowing through the APD and pass the current to an external ADC. The device supports fast response time during the transition between strong and weak optical density. The TPS61390 also provides high optical-power protection with an additional FET in series with the APD power path with the typical response time of 0.5 µs . It can recover automatically once the high optical releasing.

The TPS61390 is available in 3 mm × 3 mm QFN package with exposed pad underneath.

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Technical documentation

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Type Title Date
* Datasheet TPS61390 85-VOUT Boost Converter With Current Mirror and Sample / Hold datasheet (Rev. B) Oct. 09, 2019
More literature TPS61390EVM-020 EU Declaration of Conformity (DoC) Apr. 20, 2020
Application note How to Sample the Small APD Current Precisely With TPS61390 Boost Converter Dec. 20, 2019
Application note TPS61390 Boost Converter With Low APD Bias Voltage Ripple Dec. 13, 2019
User guide TPS61390EVM-020 Evaluation Module Apr. 02, 2018

Design & development

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Hardware development

document-generic User guide
The TPS61390 is a step-up converter with the current mirror and sample / hold circuitry being integrated, which is designed for biasing and monitoring the avalanche photodiodes (APD) in the optical receivers. The TPS61390 supports up to 85-V output from an input ranging from 2.5 V to 5.5 V. The (...)
  • Input voltage range: 2.5 V to 5.5 V
  • Output voltage range: up to 85 V
  • Sample / hold with minimum 350-ns response time
  • Optical range: ± 3dB accuracy
  • Current mirror ratios: 1:5 and 4:5
  • Switching frequency: 1.2 MHz

Software development

SLVC800.ZIP (335 KB)

Design tools & simulation

SLVMD43.ZIP (82 KB) - PSpice Model
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  • 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
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CAD/CAE symbols

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WQFN (RTE) 16 View options

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