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Texas Instruments TPS61085DGKR — DC-DC Power Modules

TPS61085DGKR Step-Up Boost Converter, 2A Switch, 8-VSSOP

MPNTPS61085DGKR
Active

Texas Instruments TPS61085DGKR, Step-Up Boost Converter, 2A (Switch) Output, Adjustable, 650kHz/1.2MHz Switching, 2.3V to 6V Input, 8-VSSOP, -40°C to 85°C.

$2.2100Ref. price · indicative, final on quote
Texas Instruments TPS61085DGKR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS61085DGKR specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input2.3V
Voltage - output18.5V
Voltage - output (Min (Fixed))2.8V
Output current2A (Switch)
Frequency - switching650kHz, 1.2MHz
I/O channels1
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Up
TopologyBoost
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Output configurationPositive
Synchronous rectifierNo

Product details

2 A switch — sizing the output for the load

The TPS61085DGKR is a step-up (boost) DC-DC converter from Texas Instruments with a 2 A internal switch. That 2 A rating is the peak current the switch can handle, not the output current.

650 kHz or 1.2 MHz — the inductor trade-off

The switching frequency is pin-selectable between 650 kHz and 1.2 MHz. Running at 1.2 MHz shrinks the inductor footprint but increases switching losses.

Input and output voltage range

The adjustable output goes up to 18.5 V, which opens up applications like biasing LCD panels, driving white LED strings, or powering sensor rails that need more than the input bus. Minimum fixed output starts at 2.8 V.

Frequently asked questions

What is the maximum output current of TPS61085DGKR?

The internal switch is rated for 2 A peak current. The maximum continuous output current depends on the input-to-output voltage ratio and efficiency; for a typical 5 V output from a 3.3 V input, you can expect around 1 A to 1.2 A continuous.

What is the switching frequency of TPS61085DGKR?

The switching frequency is pin-selectable: 650 kHz or 1.2 MHz. Use 650 kHz for higher efficiency and 1.2 MHz for smaller inductor size.

Is TPS61085DGKR suitable for battery-powered applications?

Yes. The 2.3 V minimum input voltage lets it run from a single-cell Li-ion battery down to near-depletion, and the selectable switching frequency helps balance efficiency against inductor size in a portable design.

Can TPS61085DGKR be used for an LED driver?

Yes, it can drive a string of white LEDs. The adjustable output goes up to 18.5 V, which is enough for 4-5 series LEDs. You will need external current-sense circuitry since the part does not have a dedicated LED driver constant-current loop.