Product Summary

The MP2249DN is a 1MHz constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency and eliminates the need for an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The MP2249DN can supply 3A of load current from a 2.5V to 6V input voltage. It can run at 100% duty cycle for low dropout applications. The MP2249DN provides internal soft-start control to reduce rush current and output discharge function to control discharging of the output capacitor. The MP2249DN is available in small 3mmx3mm TQFN10 or SOIC8E package.

Parametrics

MP2249DN absolute maximum ratings: (1)Vin (Min)(V): 2.5 V; (2)Vin (Max)(V): 6 V; (3)lout (Max)(A): 3 A; (4)Isw Valley Limit (Typ)(A): 4.5 A; (5)Iq (Typ)(mA): 0.48 mA; (6)Vfb (V): 0.6 V.

Features

MP2249DN features: (1)High Efficiency: Up to 90%; (2)Power-Save Mode at Light Load; (3)1MHz Constant Switching Frequency; (4)Up to 4.5A Peak Current; (5)2.5V to 6V Input Voltage Range; (6)Output Adjustable from 0.6V to VIN; (7)100% Duty Cycle in Dropout; (8)Output Discharge Function; (9)Internal Soft-Start Control; (10)Power Good Indicator; (11)Short Circuit Protection; (12)Thermal Fault Protection; (13)Available in a 3x3mm TQFN10 or SOIC8E Package.

Diagrams

 MP2249DN pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MP2249DN-LF
MP2249DN-LF

Monolithic Power Systems (MPS)

Switching Converters, Regulators & Controllers 1MHz 6V 3A Low-V Synch Step-Down

Data Sheet

0-1: $1.93
1-25: $1.79
25-100: $1.66
100-500: $1.52
MP2249DN-LF-Z
MP2249DN-LF-Z

Monolithic Power Systems (MPS)

Switching Converters, Regulators & Controllers 1MHz 6V 3A Low-V Synch Step-Down

Data Sheet

0-1750: $1.38
1750-2000: $1.32
2000-2500: $1.32
2500-5000: $1.29