MP2307DN

Synchronous Buck Converter

The MP2307DN is a synchronous buck converter from Monolithic Power Systems, Inc.. View the full MP2307DN datasheet below including electrical characteristics, absolute maximum ratings.

Manufacturer

Monolithic Power Systems, Inc.

Overview

Part: MP2307 — Monolithic Power Systems, Inc.

Type: Synchronous Buck Regulator

Description: A monolithic synchronous buck regulator integrating 100mΩ MOSFETs, providing 3A continuous load current over a 4.75V to 23V input range with up to 95% efficiency and fixed 340KHz frequency.

Operating Conditions:

Supply voltage: 4.75V to 23V
Operating temperature: -40°C to +85°C
Output voltage: 0.925V to 20V

Absolute Maximum Ratings:

Max supply voltage: +26V
Max junction temperature: 150°C
Max storage temperature: -65°C to +150°C

Key Specs:

Continuous output current: 3A
Peak output current: 4A
Operating input voltage range: 4.75V to 23V
Output adjustable range: 0.925V to 20V
Typical efficiency: Up to 95%
Fixed switching frequency: 340 KHz
High-Side Switch On-Resistance: 100 mΩ (Typ)
Low-Side Switch On-Resistance: 100 mΩ (Typ)
Feedback Voltage: 0.925 V (Typ, 4.75V ≤ VIN ≤ 23V)
Shutdown Supply Current: 0.3 μA (Typ, V EN = 0V)

Features:

Integrated 100mΩ Power MOSFET Switches
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Thermally Enhanced 8-Pin SOIC Package

Applications:

Distributed Power Systems
FPGA, DSP, ASIC Power Supplies
Networking Systems
Green Electronics/Appliances
Notebook Computers

Package:

SOIC8N (Exposed Pad)

Features

3A Continuous Output Current 4A Peak Output Current
Wide 4.75V to 23V Operating Input Range
Output Adjustable from 0.925V to 20V
Integrated 100m Ω Power MOSFET Switches
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Cycle-by-Cycle Over Current Protection
Fixed 340KHz Frequency
Input Under Voltage Lockout
Thermally Enhanced 8-Pin SOIC Package

Applications

Distributed Power Systems
FPGA, DSP, ASIC Power Supplies
Networking Systems
Green Electronics/Appliances
Notebook Computers

'MPS' and 'The Future of Analog IC Technology' are Registered Trademarks of Monolithic Power Systems, Inc.

MP2307_TAC01

Pin Configuration

Pin #	Name	Description
1	BS	High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET switch. Connect a 0.01 μ F or greater capacitor from SW to BS to power the high side switch.
2	IN	Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.75V to 23V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Input Capacitor .
3	SW	Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side switch.
4	GND	Ground (Connect the exposed pad to Pin 4).
5	FB	Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage divider connected to it from the output voltage. The feedback threshold is 0.925V. See Setting the Output Voltage .
6	COMP	Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network from COMP to GND. In some cases, an additional capacitor from COMP to GND is required. See Compensation Components.
7	EN	Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator; low to turn it off. Attach to IN with a 100k Ω pull up resistor for automatic startup.
8	SS	Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to set the soft-start period. A 0.1 μ F capacitor sets the soft-start period to 15ms. To disable the soft-start feature, leave SS unconnected.

Electrical Characteristics

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameter	Symbol	Condition	Min	Typ	Max	Units
Shutdown Supply Current		V EN = 0V		0.3	3	μ A
Supply Current		V EN = 2.0V, V FB = 1.0V		1.3	1.5	mA
Feedback Voltage	V FB	4.75V ≤ V IN ≤ 23V	0.9	0.925	0.95	V
Feedback Overvoltage Threshold				1.1		V
Error Amplifier Voltage Gain (5)	A EA			400		V/V
Error Amplifier Transconductance	G EA	∆ I C = ± 10 μ A		820		μ A/V
High-Side Switch On-Resistance (5)	R DS(ON)1			100		m Ω
Low-Side Switch On-Resistance (5)	R DS(ON)2			100		m Ω
High-Side Switch Leakage Current		V EN = 0V, V SW = 0V		0	10	μ A
Upper Switch Current Limit		Minimum Duty Cycle	4	5.8		A
Lower Switch Current Limit		From Drain to Source		0.9		A
COMP to Current Sense Transconductance	G CS			5.2		A/V
Oscillation Frequency	F osc1		300	340	380	KHz
Short Circuit Oscillation Frequency	F osc2	V FB = 0V		110		KHz
Maximum Duty Cycle	D MAX	V FB = 1.0V		90		%
Minimum On Time (5)	T ON			220		ns
EN Shutdown Threshold Voltage		V EN Rising	1.1	1.5	2	V
EN Shutdown Threshold Voltage Hysterisis				220		mV

Absolute Maximum Ratings

Supply Voltage VIN....................... -0.3V to +26V

Switch Voltage VSW................. -1V to VIN + 0.3V

Boost Voltage VBS..........VSW - 0.3V to VSW + 6V

All Other Pins................................. -0.3V to +6V

Junction Temperature...............................150°C

Lead Temperature....................................260°C

Storage Temperature .............-65°C to +150°C

Recommended Operating Conditions

Input Voltage VIN............................ 4.75V to 23V Output Voltage VOUT .................... 0.925V to 20V Ambient Operating Temp .............. -40°C to +85°C

Thermal Resistance (3) θ JA θ JC SOIC8N .................................. 50 ...... 10... ° C/W

Maximum Power Dissipation Operating ( TA=25°C) SOIC8N (4) , POUT ....................... .......... ........ 2W

Typical Application

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
MP2307	Monolithic Power Systems, Inc.	SOIC-8

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