3.7V同步升压输出5V2.1A-FP6716
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FP6716
Synchronous Step-Up Converter Pin Assignments
SP Package (SOP-8 Exposed Pad)
PG OUT ILIM
EN GND
2
34
6
5781VIN FB LX 9
PGND
Fig ure 1. Pin Assignment of FP6716
Description
The FP6716 is a high efficiency, fixed frequency
550KHz, current mode PWM boost DC/DC converter which could operate battery such as input voltage down to 2.5V. The converter output voltage can be adjusted to a maximum of 5.25V by an external resistor divider. Besides the converter includes a 0.05Ω N -channel MOSFET switch and 0.08Ω P-channel synchronous rectifier. So no external Schottky diode is required and could get better efficiency near 93%.
The converter is based on a fixed frequency, current mode, pulse-width-modulation PWM controller that goes automatically into PSM mode at light load. When converter operation into discontinuous mode, the internal anti-ringing switch will reduce interference and radiated electromagnetic energy. The FP6716 is available in a space-saving SOP-8 (Exposed Pad ) package for portable application.
Features
● High Efficiency up to 93%
● Low R DS (ON) Integrated Power MOSFET ● NMOS 50mΩ/PMOS 80mΩ
● Wide Input Voltage Range: 2.5V to 5.5V ● Fixed 550KHz Switching Frequency
● Low-Power Mode for Light Load Conditions ● ±2.0% Voltage Reference Accuracy ● Adjustable Current Limit
● PMOS Current Limit for Short Circuit Protection ● Low Quiescent Current
● Output Ripple under 200mV (Scope Full Bandwidth)
● Input Under Voltage Lockout ● Internal Compensation Function ● Built-In Soft Start Function
● Over-Temperature Protection with Auto Recovery ● Output Overvoltage Protection
●
SOP-8 (Exposed Pad ) Pb-Free Package
Applications
● Portable Power Bank ● Wireless Equipment ● Handheld Instrument ●
GPS Receiver
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FP6716
Typical Application Circuit
VOUT
L1
VIN
5V/3A
Figure 2. Typical Application Circuit
Functional Pin Description
Pin Function
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Block Diagram
OUT
Figure 3. Block Diagram of FP6716
Absolute Maximum Ratings(Note 1)
● Supply Voltage V IN ----------------------------------------------------------------------------------------------- -0.3V to +6.5V ● LX Voltage V LX ---------------------------------------------------------------------------------------------------- -0.3V to +6.5V ● All Other Pins Voltage ------------------------------------------------------------------------------------------- -0.3V to +6.5V ● Maximum Junction Temperature (T J) ------------------------------------------------------------------------ +150°C
● Storage Temperature (T S) -------------------------------------------------------------------------------------- -65°C to +150°C ● Lead Temperature (Soldering, 10sec.) --------------------------------------------------------------------- +260°C
● Package Thermal Resistance, (θJA)
SOP-8 (Exposed Pad) ------------------------------------------------------------------------------ 60°C/W
● Package Thermal Resistance, (θJC)
SOP-8 (Exposed Pad) ------------------------------------------------------------------------------ 15°C/W
Note 1：Stresses beyond this listed under “Absolute Maximum Ratings" may cause permanent damage to the device. Recommended Operating Conditions
● Supply Voltage V IN ----------------------------------------------------------------------------------------------- +2.5V to +5.5V ● Output Voltage Range ------------------------------------------------------------------------------------------- up to +5.25V
● Operation Temperature Range -------------------------------------------------------------------------------- -40°C to +85°C