MP8859

New

2.8 - 22V VIN, 3A IOUT, 4-Switch, Integrated Buck-Boost Converter with I2C Interface



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Product Description

The MP8859 is a synchronous, 4-switch, integrated buck-boost converter capable of regulating the output voltage from a 2.8V to 22V wide input voltage range with high efficiency. The integrated output voltage scaling and adjustable output current limit functions meet the USB power delivery (PD) requirement.

The MP8859 uses constant-on-time (COT) control in buck mode and constant-off-time control in boost mode, providing fast load transient response and smooth buck-boost mode transient. The MP8859 provides auto PFM/PWM or forced PWM switching modes, programmable output constant current (CC) current limit, which supports flexible design for different applications.

Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), programmable soft start, and thermal shutdown.

The MP8859 is available in a 16-pin QFN (3mmx3mm) package.

Product Features

  • Wide 2.8V to 22V Operating Input Voltage Range
  • 1V (1) to 20.47V Output Voltage Range (5V Default) with 10mV Resolution through I2C
  • 3A Output Current or 4A Input Current
  • Four Low RDS(ON) Internal Buck Power MOSFETs
  • Adjustable Accurate CC Output Current Limit with Internal Sensing MOSFET via I2C
  • 500kHz Switching Frequency
  • Output Over-Voltage Protection (OVP) Hiccup
  • Output Short-Circuit Protection (SCP) with Hiccup
  • Over-Temperature Warning and Shutdown
  • I2C Interface with ALT Pin
  • Four Programmable I2C Addresses
  • One-Time Programmable (OTP) Non-Volatile Memory
  • I2C Programmable Line Drop Compensation, PFM/PWM Mode, Soft Start, OCP, etc.
  • EN Shutdown Discharge Programmable
  • Available in a QFN-16 (3mmx3mm) Package
  • UL Certified, UL2367:  E322138 UL60950-1/ UL60950-1-07: E500002-A1-CB-1

Parametrics

  • PackageQFN-16 (3x3)
  • Isw (typ) (A)3
  • Vout (min) (V)1
  • Vout (max) (V)20.47
  • fsw (max) (kHz)500
  • Iq (typ) (mA)1
  • Vin (max) (V)22
  • Vin (min) (V)2.8

Evaluation Kit

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Kit details

The EV8859-Q-00B is an evaluation board for MP8859, which is a synchronous 4-switch integrated buck-boost converter. It can regulate  the output voltage from 2.8V to 22V wide input voltage range with high efficiency. The integrated output voltage scaling and adjustable output current limit functions fit to the USB Power Delivery (PD) requirement.

MP8859 uses constant-on-time control in buck mode and constant-off-time control in boost mode, providing fast load transient response as well as smooth buck-boost mode transient. MP8859 provides auto PFM/PWM or forced PWM switching modes, programmable output CC(Constant Current) current limit which supports flexible design for different applications.

The MP8859 also features with OCP/OVP/UVP, programmable soft-start and thermal shutdown protection.

The MP8859 is available in a 16-pin QFN(3mmx3mm) package.

US$ 25.00 + tax