TLV61046A Texas Instruments Integrated Circuit (SOT23 (6-Pin)) In Stock
The TLV61046A is a 28 V output boost converter with an integrated power diode and isolation switch, operating from inputs as low as 0.7 V in a 6-pin SOT-23 package. It targets single- and dual-cell alkaline or NiMH battery applications requiring a boosted rail up to 28 V with automatic input isolation. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- TLV61046A Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated power diode and isolation switch eliminates external Schottky diode and load-disconnect components, reducing BOM count and minimizing reverse-leakage current drain on the battery when the output is disabled
- 0.7 V minimum input voltage enables boosting from a deeply discharged single-cell alkaline or NiMH battery (nominal 1.5 V, discharged to 0.9 V), extending usable battery life in portable devices
- 28 V maximum output voltage supports OLED bias rails, piezoelectric transducer drive, and capacitive touch sensing supplies from a compact 6-pin SOT-23 footprint under 5 mm²
Applications
The TLV61046A is well suited for battery-powered portable devices that need a high-voltage rail from one or two alkaline or NiMH cells, including OLED display bias supplies, piezoelectric buzzer drivers, and capacitive touch-screen voltage generators. Its 0.7 V minimum start-up voltage and built-in isolation switch allow the converter to continue operating into deep battery discharge and prevent reverse current from the output capacitor draining the cell when the device is off. Wireless sensor nodes and IoT end devices also benefit from this converter's ultra-low quiescent current and small SOT-23 package when generating a local regulated high-voltage output from a primary battery.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TLV61046A:
suggested
suggested
suggested
suggested
suggested
Switching Regulator, Current-mode, 1.25A, 1250kHz Switching Freq-Max, PDSO6
Switching Regulator, Current-mode, 1.25A, 1250kHz Switching Freq-Max, PDSO6
Frequently Asked Questions
How low can the input voltage drop before the TLV61046A stops boosting, and what does that mean for battery runtime?
The TLV61046A can continue boost operation down to a 0.7 V input, well below the nominal 1.5 V of a fresh alkaline AA cell and even below the 0.9 V typical end-of-discharge cutoff. In practice, a single AA cell at end of life still provides sufficient voltage to operate the converter, extending the usable runtime of the battery by up to 20% to 30% compared to converters that require 1.0 V or 1.1 V minimum input. For two-cell NiMH packs (nominal 2.4 V, discharged to 1.8 V), the device remains well within its operating range throughout the entire discharge cycle.
Why does the TLV61046A include an integrated isolation switch, and what current does it prevent?
The integrated isolation switch disconnects the input supply from the output when the enable pin deasserts, preventing the output load or storage capacitor from back-feeding current through the internal diode into the battery or input rail. Without this switch, a reverse leakage path of 1 mA to 5 mA through a standard Schottky diode would drain a AAA or AA battery over 24 hours to 96 hours during standby, significantly shortening shelf life. The isolation switch reduces standby reverse leakage to below 1 µA, making the device suitable for always-on IoT nodes that spend most of their time in deep sleep.
What output voltage range can the TLV61046A regulate, and what external components set it?
The output voltage is set by an external resistor divider connected to the feedback pin, with the output programmable up to 28 V. Using standard 1% resistors — for example a 1 MΩ top resistor and a calculated bottom resistor based on the 0.5 V reference voltage — designers can target any output between approximately 3 V and 28 V in a single design. The only other external components required are an inductor (typically 10 µH to 47 µH) and input/output decoupling capacitors, keeping the total solution to 5 or fewer passive components.
For an OLED display bias supply needing 15 V from a Li-ion cell at 3.6 V, how efficient is the TLV61046A conversion?
Boosting from 3.6 V to 15 V represents a conversion ratio of approximately 4.2×. The TLV61046A achieves peak efficiency of around 80% to 88% in this conversion range, depending on inductor DCR and switching frequency. At a 15 V output and 10 mA load current (typical for an OLED panel bias rail), input current draw would be approximately 45 mA to 53 mA from the 3.6 V Li-ion cell. This keeps the power stage within the device's current limit and enables the OLED display subsystem to operate for several hours from a 500 mAh coin cell or thin-film battery.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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