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Texas Instruments TPS62843 Ultra-Low IQ Step-Down Converter

Texas Instruments TPS62843 Ultra-Low I_Q Step-Down Converter is a high-efficiency step-down converter with ultra-low operating quiescent current of typically 275nA. The device features a 4nA shutdown (typical) current when disabled. The device uses DCS-Control with a low and RF-friendly output voltage ripple to power radios.

The Texas Instruments TPS62843 operates with a typical switching frequency of 1.5MHz and extends a high efficiency at light-load down to 100µA load current and below. Eighteen pre-defined output voltages can be selected by connecting a resistor to the VSET pin, making the family usable across various applications with a minimum set of passive components.

Features

1.8V to 5.5V input voltage range
0.4V to 3.6V output voltage range
275nA typical quiescent current
600mA output current
1% output voltage accuracy
4nA typical shutdown current
Output discharge
VSET pin-selectable output voltage through a single resistor
- TPS628436: 0.4V to 0.8V
- TPS628437: 0.8V to 1.8V
- TPS628438: 1.8V to 3.6V

Optimized for small passive components
- 1µH inductor
- Down to 4.7µF C_OUT
Low output voltage ripple in power save mode
RF-friendly and fast transient DCS-Control
Automatic transition to no ripple 100% mode
0603-inductor and 0402-capacitor size supported
Tiny 6-pin, 0.35mm pitch WCSP package with 0.84mm² size
Pin-to-pin compatible to the TPS6280x family (1A)

Applications

Wearable electronics
Headsets, headphones, and earbuds
Mobile phones

Medical sensor patches
Hearing aid

Texas Instruments TPS62843 Ultra-Low IQ Step-Down Converter

Features

Applications

Functional Block Diagram

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