100kHz 1.25A Switching Regulators Preliminary Information
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MIC2172BM Product Details
The MIC2172BM and MIC3172 are complete 100kHz SMPS current-mode controllers with internal 65V 1.25A power switches. The MIC2172BM features external frequency synchronization or frequency adjustment, while the MIC3172 features an enable/shutdown control input.
Although primarily intended for voltage step-up applications, the floating switch architecture of the MIC2172/3172 makes it practical for step-down, inverting, and Cuk configurations as well as isolated topologies.
Operating from 3V to 40V, the MIC2172/3172 draws only 7mA of quiescent current making it attractive for battery operated supplies.
The MIC3172 is for applications that require on/off control of the regulator. The MIC3172 is externally shutdown by applying a TTL low signal to EN (enable). When disabled, the MIC3172 draws only leakage current (typically less than 1µA). EN must be high for normal operation. For applications not requiring control, EN must be tied to VIN or TTL high.
The MIC2172BM is for applications requiring two or more SMPS regulators that operate from the same input supply. The MIC2172BM features a SYNC input which allows locking of its internal oscillator to an external reference. This makes it possible to avoid the audible beat frequencies that result from the unequal oscillator frequencies of independent SMPS regulators.
A reference signal can be supplied by one MIC2172BM designated as a master. To insure locking of the slave's oscillators, the reference oscillator frequency must be higher than the slave's. The master MIC2172's oscillator frequency is increased up to 135kHz by connecting a resistor from SYNC to ground (see applications information).
The MIC2172/3172 is available in an 8-pin plastic DIP or SOIC for -40°C to +85°C operation.
- 1.25A, 65V internal switch rating
- 3V to 40V input voltage range
- Current-mode operation
- Internal cycle-by-cycle current limit
- Thermal shutdown
- Low external parts count
- Operates in most switching topologies
- 7mA quiescent current (operating)
- <1µA quiescent current, shutdown mode (MIC3172)
- TTL shutdown compatibility (MIC3172)
- External frequency synchronization (MIC2172)
- External frequency trim (MIC2172)
- Fits most LT1172 sockets (see applications info)
- Regulator Type
- Step Up (Boost)
- Input Voltage Range Min (V)
- Input Voltage Range Max (V)
- Output Voltage Range Min (V)
- Output Voltage Range Max (V)
- Quiescent Current (mA) typ
- Switching Frequency (kHz)
- Operating Temp Range
- -40 to 85
- Vfb (V)
- Duty Cycle Max (%)
- Switch current (A) typ
- Alternative Topology
- SEPIC, Flyback
MIC2172 Technical Documentation of Application Note
MIC2172BM Related Products
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1.We provide 90 days warranty.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
- Q: How does Jotrin guarantee that MIC2172BM is the original manufacturer or agent of MICROCHIP?
- We have a professional business development department to strictly test and verify the qualifications of MICROCHIP original manufacturers and agents. All MICROCHIP suppliers must pass the qualification review before they can publish their MIC2172BM devices; we pay more attention to the channels and quality of MIC2172BM products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of MIC2172BM chips? Including MICROCHIP original factory information, Switch, DC to DC regulator, the controller application, MIC2172BM pictures?
- You can use Jotrin's intelligent search engine, or filter by Step Up (Boost) – Non-Synchronous Products category, or find it through Microchip Technology, Inc Information page.
- Q: Are the MICROCHIP's MIC2172BM price and stock displayed on the platform accurate?
- The MICROCHIP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for MIC2172BM, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
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- Q: What is the process for returns or replacement of MIC2172BM?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the MIC2172BM we delivered, we will accept the replacement or return of the MIC2172BM only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of MIC2172BM.
(3)The MIC2172BM is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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- Need any After-Sales service, please feel free contact us: firstname.lastname@example.org
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