MP9931

MP9931

100V Input, Synchronous Step-Down Controller

详情

The MP9931 is a high-voltage, synchronous step-down switching regulator controller that can directly step down voltages from up to 100V. It is capable of driving dual N-channel MOSFETs.

The MP9931’s adaptive constant-on-time (COT) control architecture provides fast transient response and eases loop stabilization. The DC auto-tune loop provides good load and line regulation. Pulse-skip mode (PSM) and ultrasonic mode (USM) enable asynchronous operation to optimize light-load efficiency.

The MP9931’s operating frequency can be configured via an external resistor or synchronized to an external clock for noise-sensitive applications. Fault protections include precision input over-voltage protection (OVP), output over-current protection (OCP), and thermal shutdown.

The MP9931 is available in a QFN-23 (4mmx4mm) package.

产品特性和优势

Basic Functions:
- Lossless On Resistance (R_DS(ON)) or Shunt Current Sense
- Constant-On-Time (COT) Control Offers Fast Load Transient Response
- 7V to 100V Input Voltage (V_IN) Range
- Adjustable Output Voltage (V_OUT) from 0.8V to 80V
- 450µA Quiescent Current (I_Q)
- 4µA Enable (EN) Shutdown Current
- 60ns Minimum On Time (t_{ON_MIN})
- Low-Dropout (LDO) Operation: Maximum Duty Cycle Up to 99%
- Ultrasonic Mode (USM), Pulse-Skip Mode (PSM), or Forced Continuous Conduction Mode (FCCM) Selectable via the MODE Pin
- Selectable Frequency via the FREQ Resistor: 100kHz to 1000kHz
- Power Good (PG) Indicator
- Selectable Ramp via the RAMP Pin
- Selectable Current Limit via the ILIM Resistor
- VDRV Pin Voltage (V_DRV) Power from the Output Voltage (V_OUT) when V_OUT > 8.4V
- External V_DRV: Bias V_DRV with an External Voltage Source Exceeding the Internal V_DRV
Drive Ability:
- 10V N-Channel MOSFET Gate Driver with 4.2A Source and 5.2A Sink Capability
SYNCI/SYNCO:
- SYNCI with External Clock
- 180° Out-of-Phase SYNCO