SparkFun

smôl Power Board AAA

Name: smôl Power Board AAA
Brand: SparkFun
SKU: SF-SPX-18621
Price: 33.7 AUD
Availability: InStock

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An intelligent power board for the smôl ecosystem that boosts the voltage from one or two AAA or AA cells up to 3.3V. Features a TPS61200 boost regulator and...

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An intelligent power board for the smôl ecosystem that boosts the voltage from one or two AAA or AA cells up to 3.3V. Features a TPS61200 boost regulator and an ATtiny43U microcontroller that enables deep sleep for the entire smôl stack — drawing just 12 µA in sleep mode.

The processor board can instruct the power board to put the entire stack into deep sleep for intervals ranging from tens of milliseconds to several days, making battery life measurable in months rather than days.

Key Features

TPS61200 Boost Regulator – Steps up 1–3 V input to 3.3 V output
ATtiny43U Microcontroller – Manages intelligent sleep/wake cycles (4 KB Flash, 256 B SRAM, 64 B EEPROM)
12 µA Deep Sleep Current – Ultra-low power consumption in power-down mode
I²C Interface – Default address 0x50
smôl FPC Interconnect – 16-way 0.5 mm pitch flexible printed circuit stacking

Specifications

Output Current (max) – ~550 mA at V_IN = 1.5 V; ~1500 mA at V_IN = 3.0 V
Regulator Quiescent Current – 55 µA
Dimensions – 40.6 × 10.7 × 7.4 mm (L × W × H max)
Weight – 1.6 g
PCB Thickness – 0.8 mm

Warning: This board has no reverse-polarity protection. Ensure your battery pack and connector have the correct polarity before connecting.

Note: Current draw from a single cell will be approximately three times what the smôl stack draws at 3.3 V. For high-current applications (such as satellite communication boards), two AA cells are recommended for best results.

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

deep sleep: Deep sleep is a low-power mode where the microcontroller turns off most functions while keeping just enough circuitry active to wake up later. It is important for battery-powered projects because it can greatly extend how long the device runs between charges.
EEPROM: A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
FPC: FPC stands for flexible printed circuit, a thin flat flexible cable or connector style often used where space is tight or some movement is needed, commonly for displays, cameras and other high-density connections. Connecting to an FPC connector generally needs a matching cable with the correct pin count, pitch and contact orientation.
microcontroller: A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
PCB: A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
SRAM: Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.