MP2315SGJ-Z

Part: MP2315SGJ — Monolithic Power Systems (MPS)

Type: Synchronous Buck (Step-Down) Converter

Description: 4.5–24 V input, 3 A synchronous step-down converter with 110 mΩ/55 mΩ integrated MOSFETs, fixed 500 kHz switching frequency and adjustable output from 0.8 V.

Operating Conditions:

• Supply voltage: 4.5–24 V
• Operating junction temperature: -40 to +125 °C
• Output voltage: 0.8 V to VIN × DMAX
• Switching frequency: 500 kHz fixed

Absolute Maximum Ratings:

• Max supply voltage (VIN): 26 V
• VSW: -0.3 V to +28 V (30 V for <10 ns)
• VBST: VSW + 6 V
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C
• Lead temperature: 260 °C
• Continuous power dissipation (TA = 25 °C): 1.25 W

Key Specs:

• Feedback voltage: 783 / 791 / 800 mV (min/typ/max)
• Current limit: 4.5 / 5.5 / 6.5 A (duty cycle = 40%)
• Oscillator frequency: 400 / 500 / 600 kHz (VFB = 750 mV)
• Shutdown supply current: 1 μA max (VEN = 0 V, TJ = 25 °C)
• Quiescent current: 120 μA typ (VEN = 2 V, VFB = 0.85 V, AAM = 0.4 V)
• HS/LS RDS(ON): 110 mΩ / 55 mΩ typ
• Maximum duty cycle: 95% typ (90% min)
• Minimum on-time: 60 ns typ
• VIN UVLO rising threshold: 3.85 / 4.05 / 4.25 V
• Soft-start time: 1.5 ms typ (10% to 90%)
• Thermal shutdown: 150 °C with 20 °C hysteresis
• Thermal resistance θJA / θJC (TSOT23-8): 100 / 55 °C/W

Features:

• Wide 4.5–24 V input range
• 3 A continuous load current
• Low RDS(ON) internal power MOSFETs
• AAM power-save mode for light-load efficiency
• Internal soft start
• Over-current protection with hiccup
• Output over-voltage protection
• Thermal shutdown
• Internal 5.1 V VCC regulator
• Lead-free, halogen-free, RoHS compliant

Applications:

• Notebook systems and I/O power
• Flat panel televisions and monitors
• Digital set-top boxes

Package:

• TSOT23-8

• Wide 4.5V to 24V Operating Input Range
• 110m Ω /55m Ω Low RDS(ON) Internal Power MOSFETs
• 3A Load Current
• Low Quiescent Current
• High-Efficiency Synchronous Mode Operation
• Fixed 500kHz Switching Frequency
• AAM Power Save Mode
• Internal Soft Start
• Over-Current Protection (OCP) and Hiccup
• Output Over-Voltage Protection (OVP)
• Thermal Shutdown
• Available in a TSOT23-8 Package
• Output Adjustable from 0.8V

• Notebook Systems and I/O Power
• Flat Panel Television and Monitors
• Digital Set-Top Boxes

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under quality assurance. 'MPS' and 'The Future of Analog IC Technology' are registered trademarks of Monolithic Power Systems, Inc.

VIN = 12V, TJ = -40°C to +125°C. (6) Typical value is tested at TJ = +25°C, unless otherwise noted.

Thermal Resistance (5) θ JA θ JC

TSOT23-8…………………....…..100…..55...°C/W

Thermal shutdown is implemented to prevent the chip from operating at exceedingly high temperatures. When the silicon die temperature is higher than 150°C, the entire chip shuts down. When the temperature is lower than its lower threshold, typically 130°C, the chip is enabled again.