Description:Fast Current limit Response Time; <2uA Shutdown Current; 1.8 to 5.5V Input Voltage Range; Controlled Turn-On; 200mA Current Limit Options; Undervoltage Lockout; Thermal Shutdown; 3us to Moderate Over Currents; 20ns to Hard Shorts; Reverse Current Blocking; Fault Blanking; RoHS Compliant
TRANSIENT; OVER CURRENT; OVER VOLTAGE; THERMAL; UNDER VOLTAGE
Driver Number of Bits:
1
Interface IC Type:
BUFFER OR INVERTER BASED PERIPHERAL DRIVER
JESD-30 Code:
R-PDSO-G5
JESD-609 Code:
e4
Length:
2.9 mm
Moisture Sensitivity Level:
1
Number of Functions:
1
Number of Terminals:
5
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Output Current Flow Direction:
SOURCE
Output Current-Max:
0.4 A
Output Peak Current Limit-Nom:
0.3 A
Package Body Material:
PLASTIC/EPOXY
Package Code:
LSSOP
Package Equivalence Code:
TSOP5/6,.11,37
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
1.4 mm
Supply Voltage-Max:
5.5 V
Supply Voltage-Min:
1.8 V
Supply Voltage-Nom:
3.3 V
Surface Mount:
YES
Technology:
MOS
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
GULL WING
Terminal Pitch:
0.95 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
1.6 mm
FPF2109 Frequently Asked Questions (FAQs)
A good PCB layout for the FPF2109 involves keeping the input and output traces as short as possible, using a solid ground plane, and placing the input and output capacitors close to the device. Additionally, it's recommended to use a shielded inductor and to keep the switching node (SW) away from sensitive analog circuits.
The inductor value for the FPF2109 depends on the input voltage, output voltage, and desired output current. A good starting point is to use the inductor value calculation formula provided in the datasheet, and then adjust based on the specific application requirements. It's also important to consider the inductor's saturation current, DC resistance, and core material.
The maximum ambient temperature for the FPF2109 is 85°C, but it's recommended to derate the device's power dissipation at higher temperatures to ensure reliable operation. The device's junction temperature should not exceed 125°C.
Yes, the FPF2109 can be used in a synchronous rectification configuration, which can improve efficiency and reduce power losses. However, this requires careful design and layout considerations to ensure proper operation and minimize EMI.
To troubleshoot issues with the FPF2109, start by checking the PCB layout and component values, ensuring that they match the recommended values in the datasheet. Next, verify that the input and output voltages are within the specified ranges, and check for any signs of overheating or excessive current draw. If the issue persists, consider using an oscilloscope to analyze the device's switching waveforms and identify any anomalies.
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Manufacturer Collaborated
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System Verified
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FPF2109 Overview
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