MIC3172YM Power Management ICs - PMIC by Microchip Technology

1.25A 100kHz Switching Regulator

Status: Active
Series: MIC3172
RoHS: Compliant
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The MIC2172 and MIC3172 are complete 100kHz SMPS current-mode controllers with internal 65V 1.25A power switches. The MIC2172 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 MIC2172 is for applications requiring two or more SMPS regulators that operate from the same input supply. The MIC2172 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 MIC2172 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.

Prices starting from US$1.52


Distributor Starting From Stock
Logo for Microchip Technology Microchip Technology US$1.52
692
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Logo for Future Electronics Future Electronics US$1.56
475
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Logo for Transfer Multisort Elektronik Transfer Multisort Elektronik US$2.46
335
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Logo for element14 element14 US$1.82
314
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Logo for Avnet America Avnet America US$1.59
190
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Logo for Farnell Farnell US$1.73
141
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Logo for Newark Electronics Newark Electronics US$1.65
-
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Logo for EBV Elektronik EBV Elektronik -
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Logo for Avnet Silica Avnet Silica -
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Features

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)

Specifications

Regulator Type Step Up (Boost)
Switching Frequency (kHz) 100
Input Voltage Range Min 3
Input Voltage Range Max 40
Output Current 1250
Temp Range Min -40
Temp Range Max 85
Alternative Topology SEPIC, CUK, Flyback
Vout Min (V) 3.6
Vout Max (V) 65
Quiescent Current (mA) typ 7
Light Load Efficiency Mode No
Switch current (A) typ 1.25
Automotive Qualified No
SHUTDOWN Current (µA) (Typ) 0.1
Vfb (V) 1.24
Synchronous Rectifier No
Duty Cycle Max (%) 95
Pins | Packaging 8 | SOIC
Temp Range -40C to +85C
Packing Media Tube (95)

Environmental Information

JEDEC Indicator e4
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.075
Shipping Weight (kg) 0.163265
Lead Count 8
Package Type SOIC
Package Width or Size 3.90mm(.150in)
Soldering Composition NiPdAu

Alternative Descriptions

MIC3172 Series 40 V 100 kHz 1.25 A SMT Buck/Boost Switching Regulator - SOIC-8 | Future Electronics
IC: PMIC | Transfer Multisort Elektronik
IC, SWITCHING REG, 1.25A, 100KHZ | element14
Conv DC to DC Single Step Up 3V to 40V 8-Pin SOIC Tube | Avnet America
1.25A 100kHz Switching Reg,MIC3172YM | RS
Dc/Dc Conv, 100Hz, -40 To 85Deg C | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a MIC3172YM?

Additional datasheets, footprints and schematics for MIC3172YM are listed on our Part Details page. You can also find images and similar parts to MIC3172YM on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for MIC3172YM on our Product Comparison page. Access via the 'View Pricing & Stock' button to view MIC3172YM price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does MIC3172YM fall under?

The MIC3172YM is listed under Semiconductors - ICs > Power Management ICs - PMIC > Voltage Regulators > DC / DC Adjustable Switching Regulators.

Can I view similar or alternative parts?

You can view similar parts to MIC3172YM when available in the DC / DC Adjustable Switching Regulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the MIC3172YM you can contact the distributor directly for product support, shipping queries etc.

Is the MIC3172YM RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for MIC3172YM have stock available?

Authorised distributors including Microchip Technology, Future Electronics, Transfer Multisort Elektronik, element14 and Avnet America have stock available or on a lead time for MIC3172YM.

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