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Details for MIC2172YM by Microchip Technology
Electronic & Electrical Components > Semiconductors - ICs > Power Management
MIC2172YM
Buy Directly from Microchip Technology Inc (96 in stock) $2.9200
DC/DC 3-40V 1.25A 100KHZ 8SOIC
MIC2172YM image

MIC2172YM by Microchip Technology

DC/DC 3-40V 1.25A 100KHZ 8SOIC
Features
3V to 40V input voltage range
7mA quiescent current (operating)
<1u00b5A quiescent current, shutdown mode (MIC3172)
Current-mode operation
External frequency synchronization (MIC2172)
External frequency trim (MIC2172)
Fits most LT1
Internal cycle-by-cycle current limit
Low external parts count
Operates in most switching topologies
TTL shutdown compatibility (MIC3172)
Thermal shutdown
Part Information
MIC2172YM image
RoHS Compliant
Description
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.
Specifications
Topology:
Boost Buck Cuk Inverting
Input Voltage Min:
3V
Input Voltage Max:
40V
No. of Outputs:
1Outputs
DC / DC Converter IC Case:
SOIC
No. of Pins:
8Pins
Output Current:
1.25A
Output Voltage Min:
-
Output Voltage Max:
-
Switching Frequency:
115kHz
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (27-Jun-2018)
Operating Temperature Min:
-40°C
Operating Temperature Range:
-40°C to +85°C
Output Voltage:
65V
Primary Input Voltage:
40V
Alternate Descriptions
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