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6A, Ultra Low Quiescent Current, Programmable Reset Timer, WLCSP Package
SGM4073 SGM4073.pdf

No.10934

FEATURES

Input Voltage Operating Range: 1.5V to 5.5V

Factory Programmed Reset Delay: 7.7s

Factory Programmed Reset Pulse: 468ms

Factory Customized Turn-On Time: 1.9s

Factory Customized Turn-Off Delay: 7.7s

Adjustable Reset Delay Option with External Resistor

Low IQ Saves Power Interfacing to Low-Voltage Chips

OFF Pin Turns Off Load Switch to Maintain Battery Charge

  during Shipment and Inventory. Ready to Use Right Out of 

  the Box

Typical RON: 20mΩ (TYP) at VBAT = 3.6V

Slew Rate/Inrush Control with tR: 3ms (TYP)

6A Maximum Continuous Current

? Output Capacitor Discharge Function during Reset Period

? Zero-Second Test-Mode Enable

? Available in Green WLCSP-1.31×1.62-12B Package

DESCRIPTION

The SGM4073 is both a timer for resetting a mobile device and an advanced load management switch for applications requiring a highly integrated solution.

If the mobile device is off, holding nSR0 low (by pressing power-on key) for 1.9s turns on the PMIC.

As a reset timer, it has one input and one fixed delay output. It generates a fixed delay of 7.7s by disconnecting the PMIC from the battery power supply for 468ms. Then the load switch is turned on again to reconnect the battery to the PMIC such that PMIC goes into power-on sequence. The reset delay can be customized by connecting an external resistor to the DELAY_ADJ pin. Refer to Table 4.

As an advanced load management switch, the SGM4073 disconnects loads powered from the DC power rail (< 6V) with stringent off-state current targets and high load capacitances (up to 200μF). The SGM4073 consists of a slew rate controlled low- impedance MOSFET switch (20mΩ typical at 3.6V) that has exceptionally low off-state current drain to facilitate compliance with standby power requirements. The slew rate controlled turn-on characteristic prevents inrush current and the resulting excessive voltage drop on power rails.

APPLICATION CIRCUIT
PIN CONFIGUTION
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