MP28167-A Buck-Boost Converter

Monolithic Power Systems' MP28167-A is a synchronous 4-switch integrated buck-boost converter capable of regulating output voltage across a wide 2.8 V to 22 V input voltage range with high efficiency. The integrated output voltage scaling and adjustable output current limit functions meet USB power delivery (PD) requirements. The MP28167-A 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 MP28167-A provides automatic pulse-frequency modulation (PFM) mode, automatic pulse-width modulation (PWM) mode, and forced PWM switching mode. It also provides a configurable output constant current (CC) limit that supports flexible design for different applications. Full protection features include overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), configurable soft-start (SS), and thermal shutdown. The MP28167-A is available in a 3 mm x 3 mm QFN-16 package.

Features

• Wide 2.8 V to 22 V operating input voltage range
• Configurable output voltage via the FB pin
• 0.08 V to 1.637 V reference voltage (V_REF) range with 0.8 mV resolution via the I²C (default V_REF is 1 V)
• 3 A output current or 4 A input current
• Four low R_DS(ON) internal buck power MOSFETs
• I²C-adjustable accurate output constant current (CC) limit with internal sensing MOSFET
• 500 kHz/750 kHz selectable switching frequency (f_sw)
• Output overvoltage protection (OVP) with hiccup mode
• Output short-circuit protection (SCP) with hiccup mode
• Overtemperature (OT) warning and OT shutdown
• I²C interface with ALT pin
• One-time programmable (OTP) non-volatile memory
• I²C-configurable line drop compensation, PFM/PWM mode, soft-start, OCP, and OVP
• Optimized performance with MPS inductor MPL-AL series