MP9931

MP9931

100V Input, Synchronous Step-Down Controller

Description

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

The MP9931's adaptive constant-on-time (COT) control architecture provides fast transient response and facilitates loop stabilization. The DC auto-tune loop provides excellent load and line regulation.

Pulse-skip mode (PSM) and ultrasonic mode (USM) enable asynchronous operation to optimize light-load efficiency.

The MP9931’s switching frequency (f_SW) can be configured by 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.

Features & Benefits

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

Active Part Numbers:

MP9931GR-Z MP9931GR-P

Meaning of P & Z

Related Products

EV9931-R-00A High-Efficiency, 100V, 20A, Synchronous Step-Down Controller Evaluation Board

The EV9931-R-00A evaluation board is designed to demonstrate the capabilities of the MP9931, a high-voltage, synchronous, step-down, switching regulator controller.

The evaluation board can achieve up to 20A of continuous output current (I_OUT) across a 25V to 100V input voltage (V_IN), with excellent load and line regulation.

The MP9931 adopts constant-on-time (COT) control internally to provide fast transient response, easy loop design, and tight output regulation. Full protection features include short-circuit protection (SCP), over-current protection (OCP), under-voltage protection (UVP), and thermal shutdown.

It is recommended to read the MP9931 datasheet prior to making any changes to the EV9931-R-00A.

$25.00
+ tax