MPQ8645

MPQ8645

16V, 30A, Scalable, Synchronous Step-Down Converter

Description

The MPQ8645 is a fully integrated, high-frequency, synchronous buck converter. The MPQ8645 offers a very compact solution that achieves up to 30A of output current (I_OUT), with excellent load and line regulation across a wide input supply range. The MPQ8645 operates at high efficiency across a wide I_OUT load range.

The MPQ8645 adopts an internally compensated constant-on-time (COT) control mode that provides fast transient response and eases loop stabilization. The switching frequency (f_SW) is 800kHz and remains constant regardless of the input and output voltages. An open-drain power good (PG) signal indicates whether the output is within its nominal voltage range.

Fully integrated protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP).

The MPQ8645 requires a minimal number of readily available, standard external components, and is available in a TQFN-25 (4mmx5mm) package.

Features & Benefits

3.1V to 16V with External 3.3V V_CCBias
4V to 16V with Internal Bias or External 3.3V V_CC Bias
30A Continuous Output Current (I_OUT)
Low On Resistance (R_DS(ON)), Integrated Power MOSFETs
Lossless and Accurate On-Die Current Sensing
Adaptive Constant-On-Time (COT) for Ultra-Fast Transient Response
Stable with Zero-ESR Output Capacitors
0.5% Reference Voltage across 0°C to 70°C Junction Temperature (T_J) Range
Output Voltage (V_OUT) True Remote Sense
Forced Continuous Conduction Mode (FCCM) Operation
Power Good (PG) Active-Clamped at Low Level during Power Failure
V_OUT Discharge
Pre-Biased Start-Up
Excellent Load Regulation
800kHz Switching Frequency (f_SW)
2ms Soft-Start Time (t_SS)
Output Adjustable from 0.6V to 0.9 x V_IN Up to 5.5V Max
Hiccup Mode for Over-Current Protection (OCP), Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), and Over-Temperature Protection (OTP)
Available in a TQFN-25 (4mmx5mm) Package