FPF2174_08 FAIRCHILD [Fairchild Semiconductor], FPF2174_08 Datasheet

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FPF2174_08

Manufacturer Part Number
FPF2174_08
Description
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
1.FPF2174_08.pdf (12 pages)
©2008 Fairchild Semiconductor Corporation
FPF2174 Rev. D
FPF2174
IntelliMAX™ Advanced Load Management Products
Features
Applications
Typical Application Circuit
Ordering Information
1.8 to 5.5V Input Voltage Range
Controlled Turn-On
200mA Current Limit Option
Undervoltage Lockout
Thermal Shutdown
<1 A Shutdown Current
Fast Current limit Response Time
Integrated very low V
Reverse Current Blocking
Integrated Zener Diode for Output Clamp
RoHS Compliant
PDAs
Cell Phones
GPS Devices
MP3 Players
Digital Cameras
Peripheral Ports
Hot Swap Supplies
3 s to Moderate Over Currents
20ns to Hard Shorts
FPF2174
Part
F
Schottky Diode for
Current Limit
[mA]
OFF ON
200
Blanking Time
Current Limit
[ms]
V
ON
10
IN
FPF2174
1
GND
General Description
The FPF2174 is a load switch which combines the functionality
of the IntelliMAX
voltage drop Schottky barrier rectifier and a zener clamp at the
output. The integrated solution provides full protection to
systems and loads which may encounter large current
conditions in a very compact MLP 3x3 package. This device
contain a 0.125 current-limited P-channel MOSFET which can
operate over an input voltage range of 1.8-5.5V. The Schottky
diode acts as a barrier so that no reverse current can flow when
the MOSFET is off and the output voltage is higher than the
input voltage. Switch control is by a logic input (ON) capable of
interfacing directly with low voltage control signals. Each part
contains thermal shutdown protection which shuts off the switch
to prevent damage to the part when a continuous over-current
condition causes excessive heating.
When the switch current reaches the current limit, the part
operates in a constant-current mode to prohibit excessive
currents from causing damage. If the constant current condition
still persists after 10ms, these parts will shut off the switch and
pull the fault signal pin (FLAGB) low. The switch will remain off
until the ON pin is cycled. The minimum current limit is 200mA.
These parts are available in a space-saving 6L MLP 3x3
package.
Auto-Restart
FLAGB
V
Time
[ms]
OUT
NA
TM
series load switch with a very low forward
Activity
ON Pin
Active HI
TO LOAD
August 2008
Top Mark
www.fairchildsemi.com
2174
tm

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FPF2174_08 Summary of contents

Page 1

FPF2174 IntelliMAX™ Advanced Load Management Products Features 1.8 to 5.5V Input Voltage Range Controlled Turn-On 200mA Current Limit Option Undervoltage Lockout Thermal Shutdown <1 A Shutdown Current Fast Current limit Response Time Moderate Over Currents 20ns to ...

Page 2

Functional Block Diagram V IN UVLO ON THERMAL SHUTDOWN Pin Configuration Pin Description Pin Name OUT 4 GND 5 FLAGB PAD1 FPF2174 Rev. D CONTROL LOGIC CURRENT LIMIT 1 ...

Page 3

Absolute Maximum Ratings Parameter V , ON, FLAGB to GND GND OUT Power Dissipation @ T = 25°C (note 1) A Operating Temperature Range Storage Temperature Thermal Resistance, Junction to Ambient Electrostatic Discharge Protection Recommended Operating Range ...

Page 4

Electrical Characteristics Cont 1.8 to 5.5V -40 to +85°C unless otherwise noted. Typical values are Parameter Protections Current Limit Thermal Shutdown Under Voltage Shutdown Under Voltage Shutdown Hysteresis Zener Clamp Voltage Zener ...

Page 5

Typical Characteristics 120 110 100 1.5 2.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) Figure 1. Quiescent Current vs. Input Voltage 2.0 1.8 1.6 1.4 1.2 1.0 0.8 V 0.6 0.4 ...

Page 6

Typical Characteristics 400 375 350 325 300 275 250 225 200 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 V ,INUT VO LTAGE (V) IN Figure 7. Current Limit vs. Output Voltage 345 I = 150mA OUT 330 ...

Page 7

Typical Characteristics OFF -40 - JUNCTION TEMPERATURE J Figure 13 vs. Temperature ON Off 3. ...

Page 8

Typical Characteristics V OUT 2V/DIV I OUT 5A/DIV V IN 2V/DIV 20 s/DIV Figure 19. Short Circuit Response Time (Output Shorted to GND 0.1 F 2V/DIV 4.7 L ...

Page 9

Description of Operation The FPF2174 is a current limited switch that protects systems and loads which can be damaged or disrupted by the application of high currents. The core of the device is a 0.125 P-channel MOSFET and a controller ...

Page 10

Application Information Typical Application OFF ON Battery 5. 4.7 F Input Capacitor To limit the voltage drop on the input supply caused by transient in-rush currents when the switch turns-on into a discharged load capacitor or a short-circuit, ...

Page 11

Dimensional Outline and Pad Layout FPF2174 Rev. D Package MLP06H 11 www.fairchildsemi.com ...

Page 12

TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidianries, and is not intended exhaustive list of all such trademarks. Build it Now™ CorePLUS™ CorePOWER™ CROSSVOLT™ CTL™ Current ...

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