MIC3172YN Power Management ICs - PMIC by Microchip Technology
1.25A 100kHz Switching Regulator
| Status: | Active |
|---|---|
| Series: | MIC3172 |
| RoHS: | Compliant |
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.
Where to Buy
Prices starting from US$1.90
| Distributor | Stock | ||
|---|---|---|---|
|
RS
from US$2.36
|
No stock
|
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|
Microchip Technology
from US$1.90
|
4,628
in stock
|
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|
Newark Electronics
from US$2.07
|
148
in stock
|
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|
element14
from US$2.30
|
148
in stock
|
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|
Farnell
from US$1.98
|
148
in stock
|
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|
Transfer Multisort Elektronik
from US$3.09
|
34
in stock
|
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|
Future Electronics
from US$2.14
|
-
|
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|
Avnet America
from US$2.62
|
-
|
Buy Now |
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 | PDIP |
| Temp Range | -40C to +85C |
| Packing Media | Tube (50) |
Environmental Information
| JEDEC Indicator | e3 |
|---|---|
| ROHS | Compliant |
| China EFUP | Compliant |
| Device Weight (g) | 0.4867 |
| Shipping Weight (kg) | 0.9 |
| Lead Count | 8 |
| Package Type | PDIP |
| Package Width or Size | .300in |
| Soldering Composition | Matte Tin |
Alternative Descriptions
| Dc/Dc Conv, 100Khz, 85Deg C | Newark Electronics |
| DC/DC CONV, 100KHZ, 85DEG C | element14 |
| IC: PMIC | Transfer Multisort Elektronik |
| 1.25A 100kHz Switching Reg,MIC3172YN | RS |
| MIC3172 Series 40 V 100 kHz 1.25 A SMT Buck/Boost Switching Regulator - PDIP-8 | Future Electronics |
| Conv DC to DC Single Step Up 3V to 40V 8-Pin PDIP Tube | Avnet America |
Frequently Asked Questions
Where can I find additional details, specifications and documents for a MIC3172YN?
Additional datasheets, footprints and schematics for MIC3172YN are listed on our Part Details page. You can also find images and similar parts to MIC3172YN on this page.
What pricing and inventory information can I view?
Distributor pricing and stock information is available for MIC3172YN on our Product Comparison page. Access via the 'View Pricing & Stock' button to view MIC3172YN price breaks, MOQs, lead times, inventory and SKUs from distributors.
What category does MIC3172YN fall under?
The MIC3172YN 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 MIC3172YN 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 MIC3172YN you can contact the distributor directly for product support, shipping queries etc.
Is the MIC3172YN RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Microchip Technology.
Which authorised distributors for MIC3172YN have stock available?
Authorised distributors including Microchip Technology, Newark Electronics, element14, Farnell and Transfer Multisort Elektronik have stock available or on a lead time for MIC3172YN.
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