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.
Prices starting from US$1.49
Distributor | Stock | ||
---|---|---|---|
RS
from US$1.49
|
35
in stock
|
Buy Now | |
Microchip Technology
from US$1.52
|
502
in stock
|
Buy Now | |
Future Electronics
from US$1.69
|
475
in stock
|
Buy Now | |
Transfer Multisort Elektronik
from US$2.46
|
335
in stock
|
Buy Now | |
element14
from US$1.64
|
314
in stock
|
Buy Now | |
Avnet America
from US$1.59
|
190
in stock
|
Buy Now | |
Farnell
from US$1.57
|
141
in stock
|
Buy Now | |
Newark Electronics
from US$1.65
|
-
|
Buy Now | |
EBV Elektronik
-
|
-
|
Buy Now | |
Avnet Silica
-
|
-
|
Buy Now |
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) |
---|---|
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) |
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 |
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 |
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.
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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.
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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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