FPF2700.pdf 데이터시트 (총 20 페이지) - 파일 다운로드 FPF2700 데이타시트 다운로드

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December 2013
FPF2700 / FPF2701 / FPF2702 — AccuPower™ 0.4~2 A
Adjustable Over-Current Protection Load Switches
Features
2.8 V to 36 V Input Voltage Range
Typical RDS(ON)=88 m
0.4 A to 2 A Adjustable Current Limit (Min.)
Slew Rate Controlled
ESD Protected, above 2000 V HBM
Thermal Shutdown
Active LOW Enable
UVLO Protection
Power-Good Output
Applications
Motor Drives
Digital Cameras
Consumer Electronics
Industrial
Computing
Hard Disk Drives
Telecom Equipment
Description
The AccuPowerFPF270X series is a family of
current-limit load switches that provide full protection to
systems and loads from excess current conditions.
Minimum current limit is adjustable from 0.4 A to 2.0 A.
The FPF270X contains a slew-rate-controlled N-channel
MOSFET and slew-rated turn-on to prevent power bus
disturbances from being caused by hot pluggingloads
or momentary excess load demands. The input voltage
range is 2.8 V to 36 V. Loads can be activated or
deactivated with a low-voltage logic-compatible ON pin.
Fault conditions can be monitored using the error flag
pin and/or the power-good pin.
Each member of the FPF270X family serves a category
of load-fault response. All devices clamp the load
current so that it cannot exceed an externally
programmed current level. An over temperature feature
provides further device protection in case of excessive
levels of power dissipation.
FPF2700 responds to an overload condition that lasts
longer than a fixed blanking period by turning off the
load, followed by a retry after the auto-restart time.
FPF2701 responds to an overload condition that lasts
longer than a fixed blanking period by latching off the
load. The load remains off unless either the ON pin is
toggled or the input voltage cycles through UVLO.
Figure 1. MLP (Top View) Figure 2. MLP (Bottom View)
FPF2702 is intended to be used with external fault
management. Like the FPF2700 and FPF2701, it sets
the fault signal pin LOW when it activates current
clamping. This device is intended for applications where
external fault management coordinates the overload
response with the FPF2702.
Figure 3. SO8 (Top View)
The FPF270X is available in a space-saving, Lead and
Halogen free, 8-lead, MLP 3x3 mm and SO8 packages.
Ordering Information
Part
Number
FPF2700MPX
FPF2701MPX
FPF2702MPX
FPF2700MX
FPF2701MX
FPF2702MX
Current Limit [A]
0.4 2.0
0.4 2.0
0.4 2.0
0.4 2.0
0.4 2.0
0.4 2.0
Current Limit
Blanking Time [ms]
0.5
0.5
NA
0.5
0.5
NA
© 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 • Rev. 1.0.3
Auto-Restart
Time [ms]
127.5
NA
NA
127.5
NA
NA
ON Pin
Activity
Active LOW
Active LOW
Active LOW
Active LOW
Active LOW
Active LOW
Package
MLP3X3
MLP3X3
MLP3X3
SO8
SO8
SO8
www.fairchildsemi.com

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Application Diagram
VIN
2.8 V 36 V
OFF
ON
CIN
RSET
36 V MAX.
VIN VOUT
TO LOAD
100KΩ
ON FLAGB
100KΩ
COUT
ISET
PGOOD
GND
Block Diagram
Figure 4. Typical Application
IN
VDD
Reg
BGAP/BIAS
VREF
Current Limit
UVLO
ON
CONTROL
LOGIC
SOA Protection
Current Limit
ISET
FLAGB
THERMAL
PROTECTION
CHARGE
PUMP
VIN VOUT
+
-
OUT
PGOOD
GND
Figure 5. Block Diagram
© 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 Rev. 1.0.3
2
www.fairchildsemi.com

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Pin Configurations
VOUT 8
FLAGB 7
NC 6
GND
1 VIN
2 PGOOD
3 ISET
GND 5
4 ON
Figure 6. MLP (Bottom View)
VIN 1
PGOOD 2
ISET 3
ON 4
8 VOUT
7 FLAGB
6 NC
5 GND
Figure 7. SO8 (Top View)
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
VIN
PGOOD
ISET
ON
GND
NC
FLAGB
VOUT
Description
Supply Input. Input to the power switch and the supply voltage for the IC.
Power-Good Output. Open-drain output to indicate that output voltage has reached 90% of
input voltage.
Current Limit Set Input. A resistor from ISET to ground sets the current limit for the switch.
ON Control Input. Active LOW.
Ground
No connection. Leave open or connect to ground.
Fault Output. Active LOW, open-drain output that indicates current limit, under-voltage, or
over-temperature state.
Switch Output. Output of the power switch.
© 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 Rev. 1.0.3
3
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Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device
reliability. The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Min.
Max.
Unit
PGOOD, FLAGB, VIN to GND
-0.3 40
V
VOUT to GND
ON to GND
MLP 3x3(1), See Figure 8
PD Power Dissipation (TA=25°C) SO8(1), See Figure 10
-0.3 VIN + 0.3
-0.3 6
1.25
1.00
V
V
W
ISW Maximum Continuous Switch Current
3.5 A
TJ Operating Junction Temperature
-40 +125 °C
TSTG Storage Temperature
-65 +150 °C
ESD
Electrostatic Discharge
Protection Level
Human Body Model, JESD22-A114
Charged Device Model, JESD22-C101
2000
2000
V
JA
Thermal Resistance,
Junction to Ambient
MLP 3x3(1), See Figure 8
SO8(1), See Figure 10
80
°C/W
102
Note:
1. Thermal resistance, θJA, is determined with the device mounted on a one inch square pad, 2 oz copper pad,
and a 1.5 x 1.5 in. board of FR-4 material.
Figure 8. 80°C/W Mounted on a 1in2 Pad
of 2-oz. Copper
Figure 9. 226°C/W Mounted on a Minimum Pad
of 2-oz. Copper
Figure 10. 102°C/W mounted on a 1in2 Pad
of 2-oz. Copper
Figure 11. 181°C/W Mounted on a Minimum Pad
of 2-oz. Copper
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance. Fairchild does not recommend exceeding them or
designing to Absolute Maximum Ratings.
Symbol
Parameter
VIN Input Supply Voltage
TA Ambient Operating Temperature
Min.
2.8
-40
Max.
36.0
85
Unit
V
°C
© 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 Rev. 1.0.3
4
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Electrical Characteristics
VIN=2.8 to 36 V and TA=-40 to +85°C unless otherwise noted. Typical values are at VIN=12 V and TA=25°C.
Symbol
Parameter
Basic Operation
VIN
IQ
ISHDN
Operating Voltage
Quiescent Current
Shutdown Current
RON On Resistance
VIH
VIL
ILK
ISWOFF
VFLAGB(LO)
IFLAGB(HI)
ON Input Logic HIGH Voltage
ON Input Logic LOW Voltage
ON Input Leakage
Off Switch Leakage
FLAGB Output Logic LOW Voltage
FLAGB Output Logic HIGH Leakage
Current
VPGOOD PGOOD Trip Voltage
VPGOOD(HYS) PGOOD Hysteresis
VPGOOD(LO)
IPGOOD(HI)
PGOOD Output Logic LOW Voltage
PGOOD Output High Leakage
Current
Protections
ILIM Current Limit
ISC Short Circuit Current Limit
TSD Thermal Shutdown
UVLO Under-Voltage Shutdown
UVLO_HYST Under-Voltage Shutdown Hysteresis
Dynamic
tdon
tdoff
tR
tF
tBLANK
tRESTART
tCLR
Turn On Delay
Turn Off Delay
VOUT Rise Time
VOUT Fall Time
Over-Current Blanking Time
Auto-Restart Time
Current-Limit Response Time
Conditions
VIN=12 V, VON=0 V, IOUT=0 A
VIN=36 V, VON=3.3 V, IOUT=0 A
TA=25°C, VIN=12 V
TA=-40 to +85°C, VIN=12 V
TA=25°C, VIN=5 V
TA=-40 to +85°C, VIN=5 V
VIN=2.8 to 36 V
VIN=2.8 to 36 V
VON=5.5 V or GND
VIN=36 V, VON=3.3 V, VOUT=0 V
VIN=5 V, ISINK=1 mA
VIN=36 V, Switch On,
VFLAGB=36 V
VIN=5 V, VOUT as Percent of VIN,
VOUT Rising
VIN=5 V, VOUT as Percent of VIN,
VOUT Falling
VIN=5 V, ISINK=1 mA
VIN=36 V, Switch ON,
VPGOOD=36 V
TA=25°C
VOUT < 2 V, Switch in Over-
Current Condition
Shutdown Threshold
Return from Shutdown
Hysteresis
VIN Increasing
RL=500 Ω, CL=2 µF
FPF2700/1, TA=25°C
FPF2700, TA=25°C
VIN=12 V, VON=0 V
Min. Typ. Max. Unit
2.8 36.0 V
92 140 μA
5 14 μA
88 114
140
88 114
140
2.0 V
0.8 V
-1 1 μA
0.01 μA
0.1 0.2 V
1 μA
90 %
3%
0.1 0.2 V
1 μA
-20 +20
0.75 x
INOM
140
110
30
2.3 2.5 2.7
100
%
A
°C
V
mV
2.7
0.1
7.5
1.5
0.25 0.50 0.75
63.8 127.5 191.2
50
ms
ms
ms
μs
© 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 Rev. 1.0.3
5
www.fairchildsemi.com