FPF2148.pdf 데이터시트 (총 13 페이지) - 파일 다운로드 FPF2148 데이타시트 다운로드

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FPF2148
Full Function Load Switch
Features
„ 1.8 to 5.5V Input Voltage Range
„ Controlled Turn-On
„ 200mA Current Limit Options
„ Undervoltage Lockout
„ Thermal Shutdown
„ <2µA Shutdown Current
„ Fast Current limit Response Time
„ 5µs to Moderate Over Currents
„ 30ns to Hard Shorts
„ Fault Blanking
„ Power Good Function
„ RoHS Compliant
Applications
„ PDAs
„ Cell Phones
„ GPS Devices
„ MP3 Players
„ Digital Cameras
„ Peripheral Ports
„ Hot Swap Supplies
November 2008
tm
General Description
The FPF2148 is a load switch which provides full protection to
systems and loads which may encounter large current
conditions. These devices contain a 0.12current-limited
P-channel MOSFET which can operate over an input voltage
range of 1.8-5.5V. Switch control is by a logic input (ONB)
capable of interfacing directly with low voltage control signals.
The 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 FPF2148, 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. The minimum current limit is
200mA.
The part is available in a space-saving 6 pin 2X2 MLP package.
BOTTOM
Pin 1
TOP
Ordering Information
Part
FPF2148
Current Limit
[mA]
200/300/400
Current Limit
Blanking Time
[ms]
0
Auto-Restart
Time
[ms]
NA
ONB Pin
Activity
Active LO
©2008 Fairchild Semiconductor Corporation
FPF2148 Rev. H
1
www.fairchildsemi.com

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Typical Application Circuit
ON OFF
VIN VOUT
FPF2148
PGOOD
FLAGB
ONB
GND
TO LOAD
Functional Block Diagram
VIN
UVLO
ONB
THERMAL
SHUTDOWN
CONTROL
LOGIC
FLAGB
CURRENT
LIMIT
REVERSE
CURRENT
BLOCKING
VOUT
PGOOD
GND
FPF2148 Rev. H
2 www.fairchildsemi.com

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Pin Configuration
ONB 6
1 PGOOD
GND 5 7 2 VIN
FLAGB 4
3 VOUT
2X2 MicroFET-6
Pin Description
Pin Name
1 PGOOD
2 VIN
3 VOUT
4 FLAGB
5, 7 GND
6 ONB
Function
Power Good output: Open drain output which indicate that output voltage has reached
90% of input voltage
Supply Input: Input to the power switch and the supply voltage For the IC
Switch Output: Output of the power switch
Fault Output: Active LO, open drain output which indicates an over current supply under
voltage or over temperature state.
Ground
ON Control Input
Absolute Maximum Ratings
Parameter
VIN, VOUT, ONB, FLAGB, PGOOD to GND
Power Dissipation
Operating and Storage Junction Temperature
Thermal Resistance, Junction to Ambient
Jedec A114A
Jedec C101C
Electrostatic Discharge Protection
Jedec A115
IEC 61000-4-2
HBM
CDM
MM
Air Discharge
Contact Discharge
Min
-0.3
-65
4000
2000
400
15000
8000
Max
6
1.2
150
86
Unit
V
W
°C
°C/W
V
V
V
V
V
Recommended Operating Range
Parameter
VIN
Ambient Operating Temperature, TA
Min
Max
Unit
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
Basic Operation
Operating Voltage
Quiescent Current
VIN
IQ IOUT = 0mA
VIN = 1.8V
VIN = 3.3V
VIN = 5.5V
1.8
40
Typ
70
75
85
Max Units
5.5 V
100
µA
120
FPF2148 Rev. H
3 www.fairchildsemi.com

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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
On-Resistance
ONB Input Logic High Voltage (ON)
ONB Input Logic Low Voltage
ONB Input Leakage
VIN Shutdown Current
FLAGB Output Logic Low Voltage
FLAGB Output High Leakage
Current
RON
VIH
VIL
VIN = 3.3V, IOUT = 200mA, TA = 25°C
VIN = 3.3V, IOUT = 200mA, TA = 85°C
VIN = 3.3V, IOUT = 200mA, TA = -40°C to +85°C
VIN = 1.8V
VIN = 5.5V
VIN = 1.8V
VIN = 5.5V
VONB = VIN or GND
VONB = 5.5V, VOUT = 5.5V,
VIN = short to GND
VIN = 5V, ISINK = 10mA
VIN = 1.8V, ISINK = 10mA
VIN = 5V, VONB = 0V
65
0.8
1.4
-1
-2
120
135
0.05
0.12
PGOOD Threshold Voltage
PGOOD Threshold Voltage
Hysteresis
VIN = 5.5V
90
1
PGOOD Output Logic Low Voltage
PGOOD Output High Leakage
Current
VIN = 5V, ISINK = 10mA
VIN = 1.8V, ISINK = 10mA
VIN = 5V, VONB = 0V
0.05
0.12
Reverse Block
VOUT Shutdown Current
Protections
VONB = 5.5V, VOUT = 5.5V,
VIN = short to GND
-2
Current Limit
Thermal Shutdown
ILIM VIN = 3.3V, VOUT = 3.0V
Shutdown Threshold TJ increasing
Return from Shutdown
200 300
140
130
Hysteresis
10
Under Voltage Lockout
Under Voltage Lockout Hysteresis
VUVLO VIN Increasing
1.55 1.65
50
Dynamic
Delay On Time
Delay Off Time
VOUT Rise Time
VOUT Fall Time
Short Circuit Response Time
tdON
tdOFF
tR
tF
RL = 500, CL = 0.1µF
RL = 500, CL = 0.1µF
RL = 500, CL = 0.1µF
RL = 500, CL = 0.1µF
VIN = 5.5V, VONB = GND. Moderate
Over-Current Condition
VIN = 5.5V, VONB = GND. Hard Short
25
45
10
110
5
30
Max Units
160
180 m
180
V
0.5
V
1
1 µA
2 µA
0.2
V
0.3
1 µA
%
%
0.1 V
0.2 V
1 µA
2 µA
400 mA
°C
1.75 V
mV
µs
µs
µs
µs
µs
ns
Note 1: Package power dissipation on 1square inch pad, 2 oz. copper board.
FPF2148 Rev. H
4 www.fairchildsemi.com

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Typical Characteristics
90
85
80
75
70
65
60
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
Figure 1. Quiescent Current vs. Input Voltage
110
105
100
95
90
85
80
75
70
65
60
55
50
-40
VIN = 5.5V
VIN = 3.3V
VIN = 1.8V
-15 10 35 60
TJ, JUNCTION TEMPERATURE (°C)
85
Figure 2. Quiescent Current vs. Temperature
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
Figure 3. VONB High Voltage vs. Input Voltage
Figure 4. VONB Low Voltage vs. Input Voltage
200
190
180
170
160
150
140
130
120
110
100
90
80
1
234
VIN, SUPPLY VOLTAGE (V)
Figure 5. RON vs. VIN
5
240
220
200
180
160
140
120
100
80
60
6 -40
VIN= 1.8V
VIN= 3.3V
VIN= 5.5V
-15 10 35 60
TJ, JUNCTION TEMPERATURE (°C)
Figure 6. RON vs. Temperature
85
FPF2148 Rev. H
5 www.fairchildsemi.com