FPF2172 Fairchild Semiconductor, FPF2172 Datasheet - Page 9

• Manufacturer Part Number: FPF2172
• Description: IC LOAD MANAGEMENT ADV POWER33-6
• Manufacturer: Fairchild Semiconductor
• Series: IntelliMax™r
• Type: High Side Switchr

Specifications of FPF2172

• Number Of Outputs: 1
• Rds (on): 125 mOhm
• Internal Switch(s): Yes
• Current Limit: 200mA
• Voltage - Input: 1.8 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-MLP
• Power Switch Family: FPF2172
• Input Voltage: 1.8 to 5.5V
• Output Current: 200mA
• Mounting: Surface Mount
• Package Type: MLP EP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Pin Count: 6
• Power Dissipation: 1.4W
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Maximum Power Dissipation: 1400 mW
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: FPF2172TR

FPF2172 Rev. I
Application Information
Typical Application
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, a capacitor needs to be placed
between V
placed close to the V
further reduce the voltage drop experienced as the switch is
turned on into a large capacitive load.
Output Capacitor
A 0.1uF capacitor C
GND. This capacitor will prevent parasitic board inductances
from forcing V
Power Dissipation
During normal operation as a switch, the power dissipation is
small and has little effect on the operating temperature of the
part. The parts with the higher current limits will dissipate the
most power and that will only be typically,
When using the part, attention must be given to the manual
resetting of the part. Continuously resetting the part at a high
duty cycle when a short on the output is present can cause the
temperature of the part to increase. The junction temperature
will only be allowed to increase to the thermal shutdown
threshold. Once this temperature has been reached, toggling
ON will not turn-on the switch until the junction temperature
drops.
Board Layout
For best performance, all traces should be as short as possible.
To be most effective, the input and output capacitors should be
placed close to the device to minimize the effects that parasitic
trace inductances may have on normal and short-circuit
operation. Using wide traces for V
minimize parasitic electrical effects along with minimizing the
case to ambient thermal impedance.
Battery
5.5V
P
=
I
IN
LIM
and GND. A 4.7µF ceramic capacitor, C
OUT
×
V
below GND when the switch turns-off.
DROP
OUT
IN
pin. A higher value of C
, should be placed between V
C1 = 4.7µF
=
0.4 0.4
OFF ON
×
IN
, V
=
OUT
5.5V MAX
160mW
and GND will help
IN
can be used to
IN
, must be
OUT
V
ON
IN
and
(1)
FPF2172
9
GND
FLAGB
V
OUT
R1 = 100KΩ
C2 = 0.1µF
www.fairchildsemi.com
R2 = 110Ω