GLF76321 / T

Integrated Load Switch with Deep Sleep Mode

GLF Efuse

0.97mm x 1.47mm 
GLF76321 0.55mm thick 
GLF76321T 0.35mm ultra-thin
0.5mm pitch
6 bump


  • Ultra-Low ISD: 7 nA Typ @ 3.6VBAT
  • Ultra-Low IQ: 3 nA Typ @ 3.6VBAT
  • Low RON : 31 mΩ Typ @ 3.6VBAT
  • IOUT Max : 2A
  • Wide Input Range: 1.5V to 5.5V
    • 6Vabs max
  • Deep Sleep Mode by /SRO and OFF Pins
    Disconnect the downstream system
    from the battery source
  • Integrated Delay Time(Hold Time)
    to Deep Sleep, 7s
  • Turn-Off Delay Time, 7s
  • Controlled Output Rise Time :
    1ms at 3.6VBAT
  • Integrated Output Discharge
    Switch When Disabled
  • Operating Temperature Range:
    -40 to 85°C
  • HBM: 6kV, CDM: 2kV
  • Ultra-Small: 0.97mm x 1.47mm WLCSP
  • Ultra-Thin on GLF76321T:
    0.35mm Typ., 0.4mm Max.


  • Wearables
  • IOT Devices
  • Medical Devices


GLF 71311 schematic


GLF76321 application schematic

The GLF76321 / GLF76321T is an ultra-thin, ultra-efficient IQSmartTM load switch with an integrated deepsleep timer for wearables and IoT devices.

The /SRO pin enables a whole system to enter ultradeep sleep power conservation mode by disconnecting the system from the battery charge, with ultra-low standby current of 7nA typical. With the switch placed between a battery and system, this switch can help to significantly extend system battery life in mobile devices during shipping or periods of extended off time.

The part supports two methods for entering the deep sleep: supporting both user and interrupt initiated events. Deep sleep can be initiated or exited by either holding the SRO pin low for a predefined delay time (ideal for user control) or by providing a rising edge signal to the OFF pin (ideal for logic or interrupt control).

To exit the deep sleep, the user can hold down the /SRO pin to ground for 1.3 seconds, or simply connect a charger adapter to trigger the Wake pin.

The GLF76321 / GLF76321T helps to reduce power consumption with the best in class RON and a breakthrough on state IQ of only 3nA typical when the switch is on.

The GLF76321 / GLF76321T integrated 1ms slew rate control can also enhance system reliability by mitigating bus voltage swings during switching events. Where uncontrolled switching can generate high inrush currents that result in voltage droop and/or bus reset events, the GLF slew rate control specifically limits inrush currents during turn-on to minimize voltage droop. The output discharge functions makes output voltage off quickly during the reset period.

The GLF76321 is available in 0.97mm x 1.47mm x 0.55mm wafer level chip scale package (WLCSP).

The GLF76321T is ultra-thin: 0.35mm Typ, 0.4mm Max


NOTE: Spec values & feature set for "Coming Soon" and "Development" devices are provided on a best estimate basis, based on available data at time of estimate. Values are subject to change. GLF makes no warrenties that it will release or offer for sale products that are marked “Coming Soon” or “Development” "Integrated Features" Table Key: √ = Feature Included, P = Programmable Feature

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