MP2307DN-LF-Z

Part: MP2307DN — Monolithic Power Systems (MPS)

Type: Synchronous Step-Down (Buck) Converter

Description: 4.75–23 V input, 3 A continuous (4 A peak) synchronous buck converter with integrated 100 mΩ MOSFETs, fixed 340 kHz switching and up to 95% efficiency. Not recommended for new designs (refer to MP2393).

Operating Conditions:

• Supply voltage: 4.75–23 V
• Operating temperature: -40 to +85 °C (ambient)
• Output voltage range: 0.925–20 V
• Switching frequency: 340 kHz fixed

Absolute Maximum Ratings:

• Max supply voltage (VIN): 26 V
• Switch voltage VSW: -1 V to VIN + 0.3 V
• Boost voltage VBS: VSW - 0.3 V to VSW + 6 V
• All other pins: -0.3 V to +6 V
• Max junction temperature: 150 °C
• Storage temperature: -65 to +150 °C
• Lead temperature: 260 °C
• Power dissipation (TA = 25 °C, SOIC8N): 2 W

Key Specs:

• Feedback voltage: 0.900 / 0.925 / 0.950 V (min/typ/max), 4.75 V ≤ VIN ≤ 23 V
• Shutdown supply current: 0.3 μA typ, 3.0 μA max (VEN = 0 V)
• Quiescent supply current: 1.3 mA typ, 1.5 mA max (VEN = 2.0 V, VFB = 1.0 V)
• High-side / low-side switch RDS(ON): 100 mΩ / 100 mΩ typ (guaranteed by design)
• Upper switch current limit: 4.0 A min, 5.8 A typ (minimum duty cycle)
• Oscillation frequency: 300 / 340 / 380 kHz (min/typ/max); 110 kHz typ in short circuit (VFB = 0 V)
• Maximum duty cycle: 90% typ (VFB = 1.0 V); minimum on-time 220 ns typ
• Input UVLO threshold: 3.80 / 4.05 / 4.40 V (VIN rising), 210 mV hysteresis
• Soft-start: 6 μA source current; 15 ms with CSS = 0.1 μF
• Thermal shutdown: 160 °C typ (guaranteed by design)
• Thermal resistance SOIC8N: θJA 50 °C/W, θJC 10 °C/W

Features:

• 3 A continuous, 4 A peak output current
• Integrated 100 mΩ power MOSFET switches
• Current-mode control with fast transient response
• Cycle-by-cycle overcurrent protection
• Programmable soft-start
• Stable with low-ESR ceramic output capacitors
• Input undervoltage lockout
• Feedback overvoltage protection
• 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), 8 pins; ordering suffix -Z for tape and reel, -LF for lead free

• 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

• Distributed Power Systems

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 (%)

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

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

(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)

θ

JA

θ

JC

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

°

C/W

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

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

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

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

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

• 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.