MPQ8633A

16V, 12A, Synchronous Step-Down Converter with Adjustable Current Limit, Configurable Frequency, and Voltage Tracking

Datasheet EN

详情

The MPQ8633A is a fully integrated, high-frequency, synchronous buck converter. It offers a very compact solution that can achieve up to 12A of output current (I_OUT) across a wide input voltage (V_IN) supply range, with excellent load and line regulation. The MPQ8633A operates at high efficiency across a wide I_OUT load range.

The MPQ8633A adopts internally compensated constant-on-time (COT) control to provide fast transient response and eases loop stabilization. The switching frequency (f_SW) can be set to 600kHz, 800kHz, or 1000kHz with the MODE configuration, allowing f_SW to remain constant regardless of the input and output voltages.

The output voltage (V_OUT) start-up ramp is controlled by an internal 1ms timer. It can be increased by adding a capacitor on TRK/REF. An open-drain power good signal indicates whether the output is within its nominal voltage range. PGOOD is clamped at about 0.7V via an external pull-up voltage when the input supply fails to power the MPQ8633A.

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

The MPQ8633A requires a minimal number of readily available, standard external components, and is available in QFN-20 (3mmx4mm) and QFN-21 (3mmx4mm) packages.

产品特性和优势

Wide Input Voltage (V_IN) Range from 2.7V:
- 2.7V to 16V with External 3.3V Bias
- 4V to 16V with Internal Bias or External 3.3V Bias
Differential Output Voltage (V_OUT) Remote Sense
Configurable Accurate Current Limit Level
12A Output Current (I_OUT)
Low R_DS(ON) Integrated Power MOSFETs
Proprietary Switching Loss Reduction Technique
Adaptive Constant-On-Time (COT) Control for Ultra-Fast Transient Response
Stable with Zero ESR Output Capacitor
0.5% Reference Voltage across a 0°C to 70°C Junction Temperature Range
1% Reference Voltage across a -40°C to +125°C Junction Temperature Range
Selectable Pulse-Skip Mode or Forced Continuous Conduction Mode (FCCM)
Excellent Load Regulation
V_OUT Tracking
V_OUT Discharge
PGOODActive Clamped at Low Level during Power Failure
Configurable Soft-Start Time from 1ms
Pre-Bias Start-Up
600kHz, 800kHz, or 1000kHz Selectable Switching Frequency (f_SW)
Non-Latch OCP, UVP, UVLO, Thermal Shutdown, and Latch-Off for OVP
Output Adjustable from 0.6 V to 90% x Vin, Up to 5.5V Max
Available in QFN-20 (3mmx4mm) and QFN-21 (3mmx4mm) Packages