Voltage Supervisors | FTL75939

Configurable Load Switch and Reset Timer

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Overview

The FTL75939 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 /SR0 LOW (by pressing power-on key) for 2.3 s ±20% turns on the PMIC.As a reset timer, it has one input and one fixed delay output. It generates a fixed delay of 7.5 s ±20% by disconnecting the PMIC from the battery power supply for 400 ms ±20%. 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.

  • Consumer
  • Consumer Appliances
  • E-book Reader
  • Mobile Handsets
  • Mobile Comm Infrastructure
  • Portable Devices
  • Portable Navigation
  • Factory Programmed Reset Delay: 7.5 s
  • Factory Programmed Reset Pulse: 400 ms
  • Factory Customized Turn-on Time: 2.3 s
  • Factory Customized Turn-off Delay: 7.3 s
  • Adjustable Reset Delay by an external resistor (Optional)
  • Low ICCT 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
  • Input Voltage Operating Range: 1.2 V to 5.5 V
  • Over-Voltage Protection: Allow Input Pins > VBAT
  • Typical RON: 21 mΩ (Typ.) at VBAT=4.5 V
  • Slew Rate / Inrush Control with tR: 2.7 ms (Typical)
  • 3.8 A / 4.5 A Maximum Continuous Current (JEDEC 2S2P, No VIA / with Thermal VIA)
  • Output Capacitor Discharge Function
  • Zero-Second Test-Mode Enable
  • IEC61000-4-2, , Level 4 compliant SYS_WAKE Pin
  • Low < 0.2 µA Typical Shutdown Current
  • 8 kV HBM ESD (per JESD22-A114)
  • ESD Protected:
  • 2 kV CDM (per JESD22-C101)
  • 10 kV HBM ESD (Pin to Pin, VBAT & VOUT)

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MSL Temp (°C)

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ON Target

Voltages Monitored

VCC Max (V)

V(TO) Typ (V)

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Reset Active State

Reset Timer

Manual Reset

Watchdog Timer

Pricing ($/Unit)

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FTL75939UCX

Consult Sales Office

Pb

A

H

P

WLCSP-12

567RZ

1

260

REEL

3000

N

1

5.5

-

5

Low

Yes

No

No

Price N/A

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