Power Electronics
Ultra Low-Power, Load Independent, High-Efficiency Boost Converter

Ultra Low-Power, Load Independent, High-Efficiency Boost Converter

The TS3300 boost regulator from Touchstone Semiconductor uses only 3.5 µA of supply current, and the TS3300's efficiency performance is constant over a 100:1 span in output current. No other low power boost converter offers this level of performance.

The TS3300 is the industry's first boost plus linear regulator that can operate from supply voltages as low as 0.6 V up to 4.5 V and can deliver at least 75 mA of continuous output current. The TS3300 is ideally suited to be powered from a wide variety of power sources including single or multiple-cell alkaline or single Li-chemistry batteries. The boost regulator's output voltage range can be user-set from 1.8 V to 5.25 V to power an entire range of low-power analog circuits, microcontrollers and low-energy Bluetooth™ radios simultaneously. While configured to produce a 3 V output from a 1.2 V input source, the TS3300's efficiency performance is constant over a 100:1 span in output current - no other low-power boost converter offers this level of performance. For powering low-energy radios, its internal, low-dropout linear regulator can deliver up to 100mA output current while reducing boost-converter-generated output voltage ripple by 3x.

Drawing only 3.5 µA no-load supply current, the TS3300 is ideal for "always on" and other battery-powered or portable applications where extended battery run-time is a major system requirement. When used in systems where the primary power source is non-ideal or when the power source is weak, the TS3300 includes an anti-crush feature that prevents the boost converter's input voltage from excessive voltage drops; this, in turn, prevents the power source's voltage from degrading beyond usefulness.

Key Specifications:

·     Low-Power Boost + Linear Regulator in one PCB-saving TQFN package

·     Boost Regulator Maintains 84% Efficiency over 100:1 Output Current Range

·     Delivers >100 mA at 3 VOUT from 1.8 VIN " Low No-load Supply Current: 3.5 µA

·     Includes Anti-Crush™: Automatic Start-up Current Limiting from Weak Power Sources

·     Adjustable VOUT Range: 1.8 V to 5.25 V

·     Single-inductor Synchronous Rectifier " 100-mA Internal Low-dropout Linear Regulator

The TS3300 is priced at $0.85 in 1K-piece quantities. The TS3300 is fully specified over the -40 °C to +85 °C temperature range and is available in a low-profile, thermally-enhanced 16-pin 3 x 3mm TQFN package with an exposed back-side paddle.

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