MPQ8633B-H

16V, 20A, Configurable-Frequency, Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking

Description

The MPQ8633B-H is a fully integrated, high-frequency, synchronous step-down converter. It offers a compact solution that can achieve up to 20A of output current (I_OUT) across a wide input voltage (V_IN) range, with excellent load and line regulation. The MPQ8633B-H operates at high efficiency across the entire I_OUT load range.

Internally compensated constant-on-time (COT) control provides fast transient response and eases loop stabilization. The adjustable switching frequency (f_SW) can be set to 600kHz, 800kHz, or 1000kHz by configuring the MODE pin. This maintains a constant f_SW, regardless of the output voltage (V_OUT) or V_IN.

The V_OUT start-up ramp is controlled via an internal timer (1ms). For a longer internal timer, add a capacitor to the TRK/REF pin. An open-drain power good (PGOOD) signal indicates whether V_OUT is within its nominal voltage range. If the input supply fails to power the MPQ8633B-H, then PGOOD is clamped at about 0.7V via an external pull-up voltage.

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

The MPQ8633B-H requires a minimal number of readily available, standard external components, and is available in a QFN-21 (3mmx4mm) package.

Features & Benefits

Wide Input Voltage (V_IN) Range
- 2.7V to 16V V_IN Range with External 3.3V VCC Bias
- 4V to 16V V_IN Range with Internal Bias or External 3.3V VCC Bias
Differential Output Voltage (V_OUT) Remote Sense
Configurable Accurate Current Limit
20A Output Current (I_OUT)
Low On Resistance (R_DS(ON)) Integrated Power MOSFETs
Proprietary Switching Loss Reduction Technique
Adaptive Constant-On-Time (COT) Control for Fast Transient Response
Stable with Zero-ESR Output Capacitor
0.5% V_REF for 0°C to 70°C Junction Temperature (T_J) Range
1% V_REF for -40°C to +125°C T_J Range
Selectable Pulse Skip Mode (PSM)/Forced Continuous Conduction Mode (FCCM)
Excellent Load Regulation
V_OUT Tracking
PGOOD Active Clamped Low during Power Failure
Configurable Soft-Start Time (t_SS) from 1ms
Pre-Biased Start-Up
600kHz, 800kHz, or 1000kHz Selectable Switching Frequency (f_SW)
Non-Latch Over-Current Protection (OCP), Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), Under-Voltage Lockout (UVLO), and Thermal Shutdown
Adjustable Output between 0.6V and 90% of V_IN, with 5.5V Maximum
Available in a QFN-21 (3mmx4mm) Package

Active Part Numbers:

MPQ8633B-HGLE-Z MPQ8633B-HGLE-P

Meaning of P & Z

Evaluation Tools

EVQ8633B-H-LE-00A Evaluation Kit High-Efficiency, 16V, 20A, Synchronous Step-Down Converter Evaluation Board

The EVQ8633B-H-LE-00A is an evaluation board designed to demonstrate the capabilities of the MPQ8633B-H, a high-efficiency, monolithic, synchronous step-down converter.

The EVQ8633B-H-LE-00A can deliver up to 20A of continuous load current across a wide operating input voltage (V_IN) range. High efficiency can be achieved across a wide output current (I_OUT) load range.

The MPQ8633B-H utilizes an internally compensated constant-on-time (COT) control mode to provide fast transient response and ease loop stabilization. The MPQ8633B-H is available in a QFN-21 (3mmx4mm) package.

The EVQ8633B-H-LE-00A can be turned on or off via a remote on/off input (EN) referenced to ground. This input is compatible with popular logic devices.

$25.00
+ tax