FPF2024 Fairchild Semiconductor, FPF2024 Datasheet - Page 10

• Manufacturer Part Number: FPF2024
• Description: IC LOAD SWITCH 100MA 6WLCSP
• Manufacturer: Fairchild Semiconductor
• Type: High Side Switchr

Specifications of FPF2024

• Number Of Outputs: 1
• Rds (on): 315 mOhm
• Internal Switch(s): Yes
• Current Limit: 150mA
• Voltage - Input: 1.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-WLCSP
• On Resistance (max): 0.305 Ohms
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Maximum Power Dissipation: 1200 mW
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: FPF2024TR

©2008 Fairchild Semiconductor Corporation
FPF2024/5/6/7 Final. B
Current Limiting
The current limit function ensures that the current through the
switch does not exceed a maximum value while not limiting at
less than a minimum value. The minimum current at which the
parts will limit the load current is internally set to 100mA.
The switch current limiting circuitry is active at all times(Sleep
and Wakeup mode) and protects the FPF2024-FPF2027
against excessive load currents in all modes. The proprietary
current limiting circuit responds to an over-current condition in
15 µs (typ).
Undervoltage Lockout (UVLO)
The undervoltage lockout feature turns-off the switch if the input
voltage drops below the undervoltage lockout threshold. With
the ON pin active, the input voltage rising above the
undervoltage lockout threshold will cause a controlled turn-on of
the switch and will limit current over-shoots. The UVLO feature
is disabled during Sleep mode. If device is in the UVLO
condition, FLAGB goes low and indicates the fault. If the input
voltage goes below UVLO voltage but remains above 1.3V (typ)
during Sleep mode, the switch is kept on until the next Wakeup
cycle, where the UVLO violation will be detected. If the input
voltage falls below 1.3V in Sleep mode, the switch is
immediately turned off.
Thermal Shutdown
The Thermal Shutdown protects the device from internally or
externally generated excessive temperatures. The Thermal
shutdown feature is disabled during Sleep mode. However,
excessive load currents that may result in high power dissipa-
tion will be detected during Sleep mode and will activate the full-
function Wakeup mode, which has thermal shutdown protection.
During an over-temperature condition the FLAGB is pulled low
and the switch is turned-off. If the temperature of the die drops
below the threshold temperature, the switch automatically turns-
on again, To avoid unwanted thermal oscillations, a 10°C (typ)
thermal hysteresis is implemented between thermal shutdown
entry and exit temperatures.
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