Microchip MIC2172YN

Manufacturer No:

MIC2172YN

Manufacturer:

Microchip

Package:

8-DIP (0.300, 7.62mm)

Description:

2.5A 100kHz Switching Regulator

Quantity:

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In Stock :Available

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MIC2172YN information

Microchip MIC2172YN technical specifications, attributes, parameters and parts with similar specifications to Microchip MIC2172YN.

Type
Parameter

Max Duty Cycle (%)
89

Input Voltage Range Max
40

Input Voltage Range Min
3

# of Outputs
1

Output Current
400

Driver Type
Boost

Quiescent Current
7

Synchronous Rectifier
No

Temp Range Max °C (degrees Celsius)
85

Temp Range Min
-40

Topology
SEPIC, Flyback

Vout Max
65

Vfb V (volt)
1.24

VoutMin
3.6

Download datasheets and manufacturer documentation for Microchip MIC2172YN.

Data Sheets:

5ee59c146b7db3e9e891003e1f6fdae7.pdf

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 V_IN 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.

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)

User Guide

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