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Texas Instruments TPS61121RSAR — DC-DC Power Modules

TPS61121RSAR DC-DC Converter, 1.8V-5.5V Input, Obsolete

MPNTPS61121RSAR
Obsolete

Texas Instruments TPS61121RSAR DC-DC converter, 1.8V to 5.5V input, 10µA supply current, -40°C to 85°C, 16-VQFN Exposed Pad, for Handheld/Mobile Devices.

Texas Instruments TPS61121RSAR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS61121RSAR specifications
ParameterValue
MountingSurface Mount
Supply voltage1.8V ~ 5.5V
Current - supply10µA
Operating temperature-40°C~85°C
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsHandheld/Mobile Devices
Case16-VQFN Exposed Pad

Product details

Handheld power supply — what the TPS61121RSAR does

The Texas Instruments TPS61121RSAR is a DC-DC converter IC designed for Handheld/Mobile Devices, operating from a 1.8V to 5.5V supply rail and drawing just 10µA quiescent current.

Supply range and quiescent current — the battery-life decision

The 1.8V to 5.5V input range covers single-cell Li-ion (3.0V to 4.2V), two-cell alkaline (2.4V to 3.0V), and regulated 3.3V or 5V rails, making the part flexible across power architectures. At 10µA supply current, the TPS61121RSAR adds negligible drain to the battery in standby or sleep modes — the dominant load in a handheld device is usually the display backlight or wireless transceiver, not the converter itself.

Frequently asked questions

Is TPS61121RSAR obsolete and what is the recommended replacement?

Yes, the TPS61121RSAR is marked Obsolete. TI has not published a direct pin-compatible replacement under the same base number for this suffix. For an equivalent function, review the TPS611 family of DC-DC converters — the TPS61121RSAT (same die, different reel suffix) may still be available through surplus channels. Confirm the output voltage and current requirements against a current-generation TI part like the TPS610 series for new designs.

Where can I buy TPS61121RSAR with available via RFQ confirmation?

As an obsolete part, the TPS61121RSAR is not in active factory production. Stock positions change weekly; a quote confirms real-time supply.