Fairchild FPF2100, FPF2107 service manual

OFF ON ON

V

IN

GND

FPF2100 - FPF2107

FLAGB

V

OUT

TO LOAD

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FPF2100-FPF2107
IntelliMAX™ Advanced Load Management Products

FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products

May 2005

Features

 1.8 to 5.5V Input Voltage Range
 Controlled Turn-On
 200mA and 400mA Current Limit Options
 Undervoltage Lockout
 Thermal Shutdown
 <1uA Shutdown Current
 Auto restart
 Fast Current limit Response Time

 3us to Moderate Over Currents
 20ns to Hard Shorts

 Fault Blanking

Applications

 PDAs
 Cell Phones
 GPS Devices
 MP3 Players
 Digital Cameras
 Peripheral Ports
 Hot Swap Supplies

General Description

The FPF2100 through FPF2107 is a family of load switches
which provide full protection to systems and loads which may
encounter large current conditions. These devices contain a

0.125Ω current-limited P-channel MOSFET which can operate
over an input voltage range of 1.8-5.5V. 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. For the FPF2100-FPF2102 and
FPF2104-FPF2106, 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 FPF2100, FPF2101,
FPF2104 and FPF2105, have an auto-restart feature which will
turn the switch on again after 160ms if the ON pin is still active.
The FPF2102 and FPF2106 do not have this auto-restart
feature so the switch will remain off until the ON pin is cycled.
For the FPF2103 and FPF2107, a current limit condition will
immediately pull the fault signal pin low and the part will remain
in the constant-current mode until the switch current falls below
the current limit. For the FPF2100 through FPF2103, the
minimum current limit is 200mA while that for the FPF2104
through FPF2107 is 400mA.

These parts are available in a space-saving 5 pin SOT23
package.

Typical Application Circuit

©2005 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com

FPF2100-FPF2107 Rev. D2

Functional Block Diagram

UVLO

THERMAL

SHUTDOWN

CURRENT

LIMIT

CONTROL

LOGIC

V

IN

ON

V

OUT

FLAGB

GND

V

IN

GND

ON

FLAGB

V

OUT

SOT23-5

1

2

3 4

5

FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products

Pin Configuration

Pin Description

Pin Name Function

1 V
2 GND Ground
3 ON ON Control Input
4 FLAGB Fault Output: Active LO, open drain output which indicates an over current supply,

5 V

IN Supply Input: Input to the power switch and the supply voltage for the IC

OUT

under voltage or over temperature state.
Switch Output: Output of the power switch

FPF2100-FPF2107 Rev. D2

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Absolute Maximum Ratings

Parameter Min. Max. Unit

VIN, V
Power Dissipation @ TA = 25°C (note 1) 667 mW
Operating Junction Temperature -40 125 °C
Storage Temperature -65 150 °C
Thermal Resistance, Junction to Ambient 150 °C/W
Electrostatic Discharge Protection HBM 4000 V

, ON, FLAGB to GND -0.3 6 V

OUT

MM 400 V

Recommended Operating Range

Parameter Min. Max. Unit

V

IN

Ambient Operating Temperature, T

A

1.8 5.5 V

-40 85 °C

Electrical Characteristics

VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C.

Parameter Symbol Conditions Min. Typ. Max Units

Basic Operation

Operating Voltage V
Quiescent Current I

IN

I

Q

= 0mA VIN = 1.8 to 3.3V 95 A

OUT

Von active VIN = 3.3 to 5.5V 110 200
Shutdown Current I
Latch-Off Current (note 2) I
On-Resistance R

ON Input Logic High Voltage V

SHDN

LATCHOFFVON

ON

TA = 25°C, I

TA = -40 to +85°C, I

IH

VIN = 1.8V 0.75 V

= VIN, after an overcurrent fault 50 A

= 50mA 125 160 m

OUT

= 50mA 150

OUT

VIN = 5.5V 1.30
ON Input Logic Low Voltage V

IL

VIN = 1.8V 0.5 V

VIN = 5.5V 1.0
ON Input Leakage VON = VIN or GND 1 A
Off Switch Leakage I

SWOFF

FLAGB Output Logic Low Voltage VIN = 5V, I

VON = 0V, V

VIN = 1.8V, I

= 0V 1 A

OUT

= 10mA 0.1 0.2 V

SINK

= 10mA 0.15 0.3

SINK

FLAGB Output High Leakage Current VIN = 5V, Switch on 1 A

Protections

Current Limit I

LIM

VIN = 3.3V,

V

= 3.0V

OUT

FPF2100,
FPF2101,
FPF2102,
FPF2103

FPF2104,
FPF2105,
FPF2106,
FPF2107

Thermal Shutdown Shutdown Threshold 140 °C

Return from Shutdown 130

Hysteresis 10

1.8 5.5 V

1 A

200 300 400 mA

400 600 800

FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products

FPF2100-FPF2107 Rev. D2

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Electrical Characteristics Cont.

VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C.

Parameter Symbol Conditions Min. Typ. Max Units

Protections

Under Voltage Shutdown UVLO VIN Increasing 1.5 1.6 1.7 V
Under Voltage Shutdown Hysteresis 47 mV

Dynamic

Turn on time t
Turn off time t
V

Rise Time t

OUT

V

Fall Time t

OUT

Over Current Blanking Time t

Auto-Restart Time t

ON

OFF

R

F

BLANK

RSTRT

Short Circuit Response Time VIN = VON = 3.3V. Moderate

Note 1: Package power dissipation on 1square inch pad, 2 oz copper board.
Note 2: Applicable only to FPF2102 and FPF2106. Latchoff current does not include current flowing into FLAGB.

RL=500, CL=0.1uF 25 s

RL=500, CL=0.1uF 50 s

RL=500, CL=0.1uF 12 s

RL=500, CL=0.1uF 136 s

FPF2100, FPF2101, FPF2102,

5 10 20 ms

FPF2104, FPF2105, FPF2106

FPF2100, FPF2101, FPF2104,

80 160 320 ms

FPF2105

3 s

Over-Current Condition.

VIN = VON = 3.3V. Hard Short. 20 ns

FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products

FPF2100-FPF2107 Rev. D2

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