The MIC9130BM-TR is a current-mode PWM controller that efficiently converts -48V telecom voltages to logic levels. The MIC9130BM-TR features a high voltage start-up circuit that allows the device to be connected to input voltages as high as 180V. The high input voltage capability protects the MIC9130BM-TR from line transients that are common in telecom systems. It also saves board space and simplifies designs by integrating several external components.The MIC9130BM-TR is capable of high speed operation. Typically the MIC9130BM-TR can control a sub-25ns pulse width on the gate out pin. its internal oscillator can operate over 2.5MHz, with even higher frequencies available through synchronisation. The high speed operation of the MIC9130BM-TR is made safe by the very fast, 34ns response from current sense to output, minimizing power dissipation in a fault condition.The MIC9130BM-TR allows for the designs of high efficiency power supplies. It can achieve efficiencies over 90% at high output currents. Its low 1.3mA quiescent current allows high efficiency even at light loads.The MIC9130BM-TR has a maximum duty cycle of 50%. For designs requiring a high duty cycle, refer to the MIC9131. The MIC9130BM-TR is available in a 16-pin SOP (small-outline package). The rated junction temperature range is from -40°C to +125°C.
Feature
- Input voltages up to 180V
- Internal oscillator capable of >2.5MHz operation
- Synchronization capability to 4MHz
- Current sense delay of 34ns
- Minimum pulse width <25ns
- 90% efficiency
- 1.3mA quiescent current
- 1µA shutdown current
- Soft-start
- Resistor programmable current sense threshold
- Selectable sort-start retry
- 4Ω sink, 12Ω source output driver
- Programmable under-voltage lockout
- Constant-frequency PWM current-mode control
- 16-pin SOIC and 16-pin QSO
