GLF’s ultra-low-power switch features “Deep Sleep” function to hold battery charge

May 1, 2018 Jamie Leland

GLF Integrated Power has introduced the GLF76321 IQSmart IC with “Deep Sleep” power conservation mode. While in this mode, the device operates with a typical standby current (ISD) of just 7nA – which is negligible compared to the typical self-discharge of Li-ion batteries. By virtually disconnecting the battery during shipment and storage, the GLF76321 enables products to operate immediately out of the box without the need for recharging.

The prolonged idle state of an electronic product during shipment and storage is one of the major contributors to battery discharge and sometimes of its rechargeable battery’s longevity. Self-discharge for Li-Ion batteries is 5% in first 24 hours and approximately 1-2% per month. Without disconnecting the battery, the system leakage can contribute an additional 3-5% (and up to 10% per month) to the discharge. For this reason, most pre-installed battery-powered devices require an initial recharge by the customer upon opening the product. GLF solves this battery-life issue by offering an ultra-low leakage current that is up to 50 times lower than similar devices.

The GLF76321 supports two methods for entering/leaving Deep Sleep mode. User operation can be initiated or exited by pulling the SRO pin to LOW for a predefined delay; or for logic or interrupt control by a signal to the OFF pin. The GLF76321 includes an integrated 1ms slew rate control and output discharge functions. 

The GLF76x21 is available in 0.97mm x 1.47mm x 0.55mm wafer level chip scale package (WLCSP).

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