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TPS62085RLT

Synchronous Step-Down Converter

The TPS62085RLT is a synchronous step-down converter from Texas Instruments. View the full TPS62085RLT datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

TPS62085RLT shares its datasheet with TPS62085, whose page lists every part number it covers.

Official TPS62085RLT datasheet (PDF) — the source this page was extracted from.

Manufacturer

Texas Instruments

Category

Switching Regulators (Buck)

Package

VSON-7 2.0x2.0mm

TPS62085RLT Key Specifications

ParameterValue
FeaturesPower good output, output discharge, 100% duty cycle, power save mode
TopologyDCS-Control synchronous buck
EfficiencyUp to 95%
ProtectionHiccup short-circuit, thermal shutdown
Output Current3A
Output Voltage0.8V to VIN (adjustable)
Quiescent Current17µA
Package Dimensions2.00mm x 2.00mm
Input Voltage Range2.5V to 6.0V
Output Capacitor Range10µF to 150µF

TPS62085RLT Overview

Part: TPS62085, TPS62086, TPS62087 (TPS62085RLTR) — Texas Instruments

Type: Synchronous Step-Down (Buck) Converter

Description: 2.5–6.0 V input, 3 A synchronous step-down converter with DCS-Control, hiccup short-circuit protection, up to 95% efficiency and 17 μA quiescent current in a 2 mm × 2 mm VSON package.

Operating Conditions:

  • Supply voltage: 2.5–6.0 V
  • Operating junction temperature: -40 to 125 °C
  • Output voltage: 0.8 V to VIN (TPS62085 adjustable); 3.3 V fixed (TPS62086); 1.8 V fixed (TPS62087)
  • Output capacitor: 10 μF to 150 μF

Absolute Maximum Ratings:

  • Voltage at VIN, FB, VOS, EN, PG: -0.3 to 7 V
  • Voltage at SW (DC): -0.3 V to VIN + 0.3 V
  • Voltage at SW (AC, less than 100 ns): -3 to 11 V
  • Operating junction temperature: -40 to 150 °C
  • Storage temperature: -65 to 150 °C

Key Specs:

  • Quiescent current: 17 μA typ, 25 μA max (no load, not switching, TJ = -40 to 85 °C, VIN = 2.5–5.5 V)
  • Shutdown current: 0.7 μA typ, 5 μA max (EN = low, TJ = -40 to 85 °C)
  • UVLO threshold: 2.2 V typ (2.1–2.3 V), VIN falling; 200 mV hysteresis
  • Feedback voltage: 800 mV typ (792–808 mV in PWM mode, IOUT = 1 A)
  • Output accuracy (fixed versions): -1.0% to +1.0% (PWM, IOUT = 1 A); -1.0% to +2.1% (PSM, IOUT = 0 A)
  • High-side / low-side RDS(on): 31 mΩ typ (56 mΩ max) / 23 mΩ typ (45 mΩ max) at ISW = 500 mA
  • High-side switch current limit: 3.7 A min, 4.6 A typ, 5.5 A max
  • PWM switching frequency: 2.4 MHz typ (IOUT = 1 A)
  • Soft-start time: 0.8 ms typ
  • Output discharge resistor: 260 Ω typ
  • Thermal shutdown: 150 °C typ, 20 °C hysteresis
  • RθJA: 107.8 °C/W (VSON-7)

Features:

  • DCS-Control topology
  • Hiccup short-circuit protection
  • Power save mode for light load efficiency
  • 100% duty cycle for lowest dropout
  • Output discharge
  • Power good output
  • Thermal shutdown protection
  • Fixed 1.8 V and 3.3 V output options, or adjustable output

Applications:

  • Battery-powered applications
  • Point-of-load
  • Processor supplies
  • Hard disk drives

Package:

  • VSON-7 (RLT), 2.00 mm × 2.00 mm

TPS62085RLT Features

  • DCS-Control ™ topology
  • Up to 95% efficiency
  • Hiccup short-circuit protection
  • Power save mode for light load efficiency
  • 100% duty cycle for lowest dropout
  • 2.5-V to 6.0-V input voltage range
  • 17-μA operating quiescent current
  • 0.8-V to V IN adjustable output voltage
  • 1.8-V and 3.3-V fixed output voltage
  • Output discharge
  • Power good output
  • Thermal shutdown protection
  • Available in 2-mm × 2-mm VSON package
  • Create a custom design using the:
  • -TPS62085 WEBENCH ® Power Designer
  • -TPS62086 WEBENCH ® Power Designer
  • -TPS62087 WEBENCH ® Power Designer

TPS62085RLT Applications

Typical Application Schematic

TPS62085RLT Pin Configuration

Figure 6-1. RLT Package 7-Pin VSON Top View

Table 6-1. Pin Functions

PINPINI/O
NAMENO.I/ODESCRIPTION
EN1INDevice enable pin. To enable the device, this pin needs to be pulled high. Pulling this pin low disables the device. This pin has a pulldown resistor of typically 400 kΩ when the device is disabled.
FB3INFeedback pin. For the fixed output voltage versions this pin must be connected to the output voltage.
GND5Ground pin.
PG2OUTPower good open drain output pin. The pullup resistor can not be connected to any voltage higher than 6 V. If unused, leave it floating.
SW6PWRSwitch pin of the power stage.
VIN7PWRInput voltage pin.
VOS4INOutput voltage sense pin. This pin must be directly connected to the output capacitor.

TPS62085RLT Electrical Characteristics

TJ = -40 °C to 125 °C, and VIN = 3.6 V. Typical values are at T J = 25 °C, unless otherwise noted.

PARAMETERPARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLYSUPPLYSUPPLYSUPPLYSUPPLYSUPPLYSUPPLY
V INInput voltage range2.56V
I QQuiescent current into VINNo load, device not switching T J = -40 °C to 85 °C, V IN = 2.5 V to 5.5 V1725μA
I SDShutdown current into VINEN = Low, T J = -40 °C to 85 °C, V IN = 2.5 V to 5.5 V0.75μA
V UVLOUndervoltage lockout thresholdV IN falling2.12.22.3V
Undervoltage lockout hysteresisV IN rising200mV
TThermal shutdown thresholdT J rising150°C
JSDThermal shutdown hysteresisT J falling20°C
LOGIC INTERFACE ENLOGIC INTERFACE ENLOGIC INTERFACE ENLOGIC INTERFACE ENLOGIC INTERFACE ENLOGIC INTERFACE ENLOGIC INTERFACE EN
V IHHigh-level input voltageV IN = 2.5 V to 6.0 V1.0V
V ILLow-level input voltageV IN = 2.5 V to 6.0 V0.4V
I EN,LKGInput leakage current into EN pinEN = High0.010.16μA
R PDPulldown resistance at EN pinEN = Low400kΩ
SOFT START, POWER GOODSOFT START, POWER GOODSOFT START, POWER GOODSOFT START, POWER GOODSOFT START, POWER GOODSOFT START, POWER GOODSOFT START, POWER GOOD
t SSSoft-start timeTime from EN high to 95% of V OUT nominal0.8ms
V PGPower good thresholdV OUT rising, referenced to V OUT nominal V falling, referenced to V nominal93% 88%95% 90%98% 93%
V PG,OLLow-level output voltageI sink = 1 mA0.4V
I PG,LKGInput leakage current into PG pinV PG = 5.0 V, T J = -40 °C to 85 °C0.010.16μA
I PG,LKGInput leakage current into PG pinV PG = 5.0 V0.010.25μA
OUTPUTOUTPUTOUTPUTOUTPUTOUTPUTOUTPUTOUTPUT
Output voltage range, TPS620850.8V INV
V OUTOutput voltage accuracy,I OUT = 1 A, V IN ≥ V OUT + 1 V, PWM mode-1.0%1.0%
TPS62086, TPS62087 (1)I OUT = 0 A, V IN ≥ V OUT + 1 V, PSM mode-1.0%2.1%
V FBFeedback regulation voltage (1) (2)I OUT = 1A , V IN ≥ V OUT + 1 V, PWM mode792800808mV
II OUT = 0 A, V IN ≥ V OUT + 1 V, PSM mode792800817mV
FB,LKG RFeedback input leakage currentV FB = 1 V0.010.1μA
DISOutput discharge resistor Line regulationEN = LOW, V OUT = 1.8 V I OUT = 1 A, V IN = 2.5 V to 6.0 V260 0.02Ω %/V
Load regulationI OUT = 0.5 A to 3 A0.16%/A
POWER SWITCHPOWER SWITCHPOWER SWITCHPOWER SWITCHPOWER SWITCHPOWER SWITCHPOWER SWITCH
RHigh-side FET ON-resistanceI SW = 500 mA3156mΩ
DS(on)Low-side FET ON-resistanceI SW = 500 mA2345mΩ
I LIMHigh-side FET switch current limit3.74.65.5A
f SWPWM switching frequencyI OUT = 1 A2.4MHz

TPS62085RLT Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

MINMAXUNIT
Voltage at Pins (2)VIN, FB, VOS, EN, PG-0.37V
Voltage at Pins (2)SW (DC)-0.3V IN + 0.3V
SW (AC, less than 100ns) (3)-311V
Operating Junction, T J-40150°C
Storage, T stg-65150°C

TPS62085RLT Recommended Operating Conditions

MIN (1)NOMMAX (1)UNIT
V INInput voltage range2.56V
I SINK_PGSink current at PG pin1mA
V PGPullup resistor voltage6V
T JOperating junction temperature-40125°C

TPS62085RLT Thermal Information

THERMAL METRIC (1)TPS6208x RLT [VSON] - 7 PINSUNIT
R θJAJunction-to-ambient thermal resistance107.8°C/W
R θJC(top)Junction-to-case (top) thermal resistance66.2°C/W
R θJBJunction-to-board thermal resistance17.1°C/W
ψ JTJunction-to-top characterization parameter2.1°C/W
ψ JBJunction-to-board characterization parameter17.1°C/W
R θJC(bot)Junction-to-case (bottom) thermal resistanceN/A°C/W

TPS62085RLT Typical Application

The TPS62085 is a synchronous step-down converter in which output voltage is adjusted by component selection. The following section discusses the design of the external components to complete the power supply design for several input and output voltage options by using typical applications as a reference. The TPS62086 and TPS62087 devices provide a fixed output voltage which does not need an external resistor divider.

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
TPS62085Texas InstrumentsVSON (7-Pin)
TPS62085RLTRTexas InstrumentsVSON-7 (2.00 mm x 2.00 mm)
TPS62085RLTTTexas InstrumentsVSON-7 2x2mm
TPS62086Texas InstrumentsVSON-HR-7
TPS62087Texas InstrumentsVSON (7-Pin)

Other Switching Regulators (Buck)

  • TPS54302 – Texas Instruments, Synchronous Step-Down Converter
  • MAX20730 – Analog Devices, Synchronous Switching Regulator
  • TLV62568 – Texas Instruments, Synchronous Buck Converter
  • LM2596 – onsemi, Step-Down Voltage Regulator
  • TPS562200 – Texas Instruments, Synchronous Buck Converter
  • MP1584EN – Monolithic Power Systems, Buck Converter
  • RT9466GQW – Richtek, Synchronous Buck Converter
  • AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter

All Switching Regulators (Buck) datasheetsAll Texas Instruments datasheets (2,442)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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