MP2307DN-Z

Synchronous Buck Converter

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

Manufacturer

Monolithic Power Systems, Inc.

Overview

Part: MP2307 — Monolithic Power Systems, Inc.

Type: Synchronous Buck Regulator

Description: The MP2307 is a monolithic synchronous buck regulator that provides 3A of continuous load current over a 4.75V to 23V input voltage range, with integrated 100mΩ MOSFETs and a fixed 340KHz switching 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
Integrated MOSFET R_DS(ON): 100 mΩ (High-Side), 100 mΩ (Low-Side)
Switching frequency: 340 KHz (typical)
Feedback voltage: 0.925 V (typical, at 4.75V ≤ VIN ≤ 23V)
Shutdown supply current: 0.3 μA (typical, V_EN = 0V)
Upper switch current limit: 5.8 A (typical)
Thermal shutdown: 160 °C (typical)

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 100mΩ 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
Networking Systems
FPGA, DSP, ASIC Power Supplies
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

Board Number	Dimensions
EV2307DN-00A	2.0'X x 1.5'Y x 0.5'Z

NEW DESIGN

· Networking Systems · FPGA, DSP, ASIC Power Supplies · Green Electronics/Appliances · Notebook Computers 'MPS' and 'The Future of Analog IC Technology' are Registered Trademarks of Monolithic Power Systems, Inc. Efficiency vs Load Current REFR TO MP2393

An adjustable soft-start prevents inrush current at turn-on and in shutdown mode, the supply current drops below 1μA. This device, available in an 8-pin SOIC package, provides a very compact system solution with minimal reliance on external components. EVALUATION BOARD REFERENCE TYPICAL APPLICATION NOT RECOMMENDED FOR

EFFICIENCY (%)

Part Number*	Package	Temperature
MP2307DN	SOIC8N (Exposed Pad)	-40° to +85°C

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

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

(2)

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)

SOIC8N .................................. 50 ...... 10...

C/W

Maximum Power Dissipation Operating

(

TA=25°C)

SOIC8N

(4)

, POUT

....................... .......... ........ 2W

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) NEW	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 REFER		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

PACKAGE REFERENCE * For Tape & Reel, add suffix -Z (eg. MP2307DN-Z) For Lead Free, add suffix -LF (eg. MP2307DN-LF-Z) ABSOLUTE MAXIMUM RATINGS (1) Switch Voltage VSW................. -1V to VIN + 0.3V Boost Voltage VBS..........VSW - 0.3V to VSW + 6V Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating conditions. 3) Measured on approximately 1' square of 1 oz copper. 4) Derating 20mW/°C at TA > 25°C ELECTRICAL CHARACTERISTICS VIN = 12V, TA = +25°C, unless otherwise noted. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2393

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 . FOR
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

Parameter	Condition	Min	Typ	Max	Units
EN Lockout Threshold Voltage		2.2	2.5	2.7	V
EN Lockout Hysterisis			210		mV
Input Under Voltage Lockout Threshold	V IN Rising	3.8	4.05	4.4	V
Input Under Voltage Lockout Threshold Hysteresis			210		mV
Soft-Start Current	V SS = 0V		6		μ A
Soft-Start Period	C SS = 0.1 μ F		15		ms
Thermal Shutdown (5)			160		°C

VIN = 12V, TA = +25°C, unless otherwise noted. Parameter EN Lockout Threshold Voltage EN Lockout Hysterisis Input Under Voltage Lockout Threshold Input Under Voltage Lockout Threshold Hysteresis Soft-Start Current Soft-Start Period Thermal Shutdown Note: 5) Guaranteed by design, not tested. NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2393

Typical Application

INPUT 4.75V to 23V C3 3.9nF D1 B130 (optional) C5 10nF MP2307 BS IN FB SW SS GND COMP EN 1 2 3 5 6 4 8 7 C6 (optional) Figure 4-MP2307 with 3.3V Output, 22μF/6.3V Ceramic Output Capacitor NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP2393

MP2307_F03

1. DRAWING IS NOT TO SCALE.

NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
MP2307	Monolithic Power Systems, Inc.	SOIC-8
MP2307DN-LF-Z	Monolithic Power Systems (MPS)	SOIC-8N-EP-150mil

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