MIC913BM5

Instrumentation, Op Amps, Buffer Amps Overview

The MIC913BM5 is a high-voltage, high-speed telecom DC-to-DC controller manufactured by Micrel. It functions as a current-mode PWM controller designed to efficiently convert -48V telecom voltages to logic levels. The device features an integrated high-voltage start-up circuit capable of handling input voltages up to 180V, protecting against common line transients. Key electrical specifications include an internal oscillator supporting operation above 2.5MHz, synchronization capability up to 6MHz, and a 75% maximum duty cycle. It offers a quiescent current of 1.3mA and a shutdown current of 1µA. The output driver provides 4Ω sink and 12Ω source impedance with a current sense delay of 34ns and minimum pulse width under 25ns.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrated high-voltage start-up circuit enabling direct connection to inputs up to 180V for transient protection
• Current-mode PWM control with programmable under-voltage lockout and soft-start capabilities
• High-speed switching characteristics including synchronization to 6MHz and low current sense delay

Instrumentation, Op Amps, Buffer Amps Applications

• Telecom power supplies
• ISDN network terminators
• DSL line cards
• Low power dc-dc converters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'BM5' against official Micrel documentation to confirm package type and temperature range. Ensure compatibility with -48V telecom systems requiring high-voltage tolerance. Cross-reference pinouts for the 16-pin SOIC or QSOP variants if applicable. Confirm RoHS compliance status as historical data may vary. Validate that the 180V input rating aligns with your system's transient requirements.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring robust high-voltage startup in telecom environments. The current-mode control and fast switching speeds suit high-frequency converter designs. Consider the 1.3mA quiescent current for efficiency-sensitive projects. Verify that the 75% duty cycle limit meets the required voltage conversion ratios. Ensure the 16-pin package fits the available board space constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

The MIC913 series comprises high-voltage DC-to-DC controllers tailored for telecommunications infrastructure. These devices are engineered to handle the harsh electrical conditions typical of -48V telecom systems. The family integrates features like high-voltage startup and synchronization to reduce external component count. This specific model represents a variant within the Micrel portfolio focused on efficient power conversion in network equipment.

Instrumentation, Op Amps, Buffer Amps FAQ

What is the maximum input voltage the MIC913BM5 can withstand?

The device features a high-voltage start-up circuit that allows connection to input voltages as high as 180V.

Does the MIC913BM5 support frequency synchronization?

Yes, the internal oscillator supports synchronization capability up to 6MHz.