MIC3172BM

MIC3172BM

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Micrel Inc.
MIC3172BM
IC REG MULTI CONFG 1.25A 8SOIC
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$0.41

Price update:a months ago
Available in stock: 333
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Micrel Inc.

Micrel Inc.

Microchip Technology Inc. stands as a preeminent purveyor of microcontroller and analog semiconductors, proffering a realm of diminished venture in product evolution, abridged aggregate system expenditure, and expedited market entry, spanning a myriad of heterogeneous patron implementations globally. With its central command stationed in Chandler, Arizona, Microchip avails itself of superlative technical assistance, concomitant with unwavering consignment and excellence.

View All Product from Micrel Inc.
MIC3172BM Products

The MIC2172 and MIC3172BM 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 MIC3172BM 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 MIC3172BM is for applications that require on/off control of the regulator. The MIC3172BM is externally shutdown by applying a TTL low signal to EN (enable). When disabled, the MIC3172BM 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.

Feature

  • 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)

Product Attributes

TYPE DESCRIPTION Select all
Package Tube
Current - Output 1.25A
Product Status Discontinued at
Frequency - Switching 100kHz
Function Step-Up, Step-Down, Step-Up/Step-Down
Synchronous Rectifier No
Output Configuration Positive or Negative
Operating Temperature -40°C ~ 85°C (TA)
Topology Buck, Boost, Cuk, Flyback, Forward Converter
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Number of Outputs 1
Supplier Device Package 8-SOIC
Voltage - Input (Min) 3V
Voltage - Input (Max) 40V

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$0.41

Price update:a months ago
Available in stock: 333
Micrel Inc.

Micrel Inc.

Microchip Technology Inc. stands as a preeminent purveyor of microcontroller and analog semiconductors, proffering a realm of diminished venture in product evolution, abridged aggregate system expenditure, and expedited market entry, spanning a myriad of heterogeneous patron implementations globally. With its central command stationed in Chandler, Arizona, Microchip avails itself of superlative technical assistance, concomitant with unwavering consignment and excellence.

View All Product from Micrel Inc.

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