Configurable Load Switch and Reset Timer

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Overview

The FTL11639 is both a timer for resetting a mobile device and an advanced load management device for applications requiring a highly integrated solution.
If the mobile device is off, holding /SR0 LOW (by pressing power-on key) for 38 ms ±20% turns on the PMIC.
As a reset timer, it has one input and one fixed delay output. It generates a fixed delay of 11.5 s ±20% by disconnecting the PMIC from the battery power supply. FTL11639 does not accept a new input signal for 400 ms ±20% to give the PMIC enough time to turn off.
The reset delay can be customized by connecting an external resistor to the DELAY_ADJ pin.
As an advanced load management switch, the FTL11639 disconnects loads powered from the DC power rail (<6 V) with stringent off-state current targets and high load capacitances (up to 200 µF). The FTL11639 consists of a slew-rate controlled low-impedance MOSFET switch (21 mΏ typical at 4.5 V) that has exceptionally low off-state current drain (<0.2 µA typical) 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.
The low ICCT enables direct interface to lower-voltage chipsets without external translation, while maintaining low power consumption.
The device is packaged in advanced, fully “green,” 1.31 mm x 1.62 mm, Wafer-Level Chip-Scale Packaging (WLCSP); providing excellent thermal conductivity, small footprint, and low electrical resistance for a wide application range.

  • Consumer
  • Consumer Appliances
  • E-book Reader
  • Mobile Handsets
  • Mobile Comm Infrastructure
  • Portable Devices
  • Portable Navigation
  • Factory Customized Turn-on Time: 38 ms
  • Factory Customized Turn-off Delay: 900 ms
  • Factory Programmed Reset Delay: 11.5 s
  • Factory Programmed Reset Pulse: 400 ms
  • Low < 0.2 µA Typical Shutdown Current
  • Off Pin Turns Off Load Switch to Maintain Battery Charge during Shipment and Inventory (Ready to Use Right Out of the Box)
  • Typical RON: 21 mΩ (Typ.) at VBAT=4.5 V
  • 3.8 A / 4.5 A Maximum Continuous Current (JEDEC 2S2P, No VIA / with Thermal VIA)
  • Adjustable Reset Delay by an External Resistor (Optional)
  • Low ICCT Saves Power Interfacing to Low-Voltage Chips
  • Input Voltage Operating Range: 1.2 V to 5.5 V
  • Over-Voltage Protection: Allow Input Pins > VBAT
  • Slew Rate / Inrush Control with tR: 2.7 ms (Typical)
  • Output Capacitor Discharge Function
  • IEC61000-4-2, Level 4 compliant SYS_WAKE Pin
  • Zero-Second Test-Mode Enable
  • 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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ON Target

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VCC Max (V)

V(TO) Typ (V)

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Reset Active State

Reset Timer

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Watchdog Timer

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FTL11639UCX

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Obsolete

CAD Model

Pb

A

H

P

WLCSP-12

1

260

REEL

3000

N

1

5.5

-

5

Low

Yes

No

No

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