Status: | Active |
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Series: | MIC2179 |
RoHS: | Compliant |
The Micrel MIC2179 is a 200kHz synchronous buck (step-down) switching regulator designed for high-efficiency, battery-powered applications.
The MIC2179 operates from a 4.5V to 16.5V input and features internal power MOSFETs that can supply up to 1.5A output current. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions. It also features a shutdown mode that reduces quiescent current to less than 5µA.
The MIC2179 achieves high efficiency over a wide output current range by operating in either PWM or skip mode. The operating mode is externally selected, typically by an intelligent system, which chooses the appropriate mode according to operating conditions, efficiency, and noise requirements. The switching frequency is preset to 200kHz and can be synchronized to an external clock signal of up to 300kHz.
The MIC2179 uses current-mode control with internal current sensing. Current-mode control provides superior line regulation and makes the regulator control loop easy to compensate. The output is protected with pulse-by-pulse current limiting and thermal shutdown. Undervoltage lockout turns the output off when the input voltage is less than 4.5V.
The MIC2179 and is packaged in a 20-lead SSOP package with an operating temperature range of -40°C to +85°C.
4.5V to 16.5V input voltage range |
Dual-mode operation for high efficiency (up to 96%) |
PWM mode for > 150mA load current |
Skip mode for <150mA load current |
150mO internal power MOSFETs at 12V input |
200kHz preset switching frequency |
Low quiescent current |
1.0mA in PWM mode |
600µA in skip mode |
< 5µA in shutdown mode |
Current-mode control |
Simplified loop compensation |
Superior line regulation |
100% duty cycle for low dropout operation |
Current limit |
Thermal shutdown |
Undervoltage lockout |
Regulator Type | Step Down (Buck) |
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pricing | 0 |
Supported Output | 0 |
Minimum Input Voltage (V) | 0 |
Maximum Input Voltage (V) | 16 |
Output Current (mA) Max | 0 |
Maximum Frequency (kHz) | 0 |
Vref (V) | 0 |
Duty Cycle Min (%) | 0 |
Duty Cycle Max (%) | 1 |
Switching Frequency (kHz) | 200 |
Input Voltage Range Min | 4.5 |
Input Voltage Range Max | 16.5 |
Output Current | 1500 |
Temp Range Min | -40 |
Temp Range Max | 85 |
Vout Min (V) | 1.245 |
Vout Max (V) | 16.5 |
Quiescent Current (mA) typ | 0.6 |
Light Load Efficiency Mode | Yes |
Switch current (A) typ | 0 |
Automotive Rated | No |
SHUTDOWN Current (µA) (Typ) | 1 |
# of Outputs | 1 |
Vfb (V) | 1.245 |
Synchronous Rectifier | Yes |
Pins | Packaging | 20 | SSOP |
Temp Range | -40C to +85C |
Packing Media | Tube (67) |
Data Sheets |
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MIC2179 - 1.5A Synchronous Buck Regulator |
Application Notes |
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Micrel ANTC203 - PCI Express Signal Integrity and EMI - PCI Express Signal Integrity and EMI |
JEDEC Indicator | e3 |
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ROHS | Compliant |
China EFUP | Compliant |
Device Weight (g) | 0.1642 |
Shipping Weight (kg) | 0.343284 |
Lead Count | 20 |
Package Type | SSOP |
Package Width or Size | .209in |
Soldering Composition | Matte Tin |
Dc-Dc Conv, Buck, 200Khz, Ssop-20 | Newark Electronics |
DC-DC CONV, BUCK, 200KHZ, SSOP-20 | Farnell |
Where can I find additional details, specifications and documents for a MIC2179YSM?
Additional datasheets, footprints and schematics for MIC2179YSM are listed on our Part Details page. You can also find images and similar parts to MIC2179YSM on this page.
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What category does MIC2179YSM fall under?
The MIC2179YSM is listed under Semiconductors - ICs > More Semiconductors - ICs.
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Is the MIC2179YSM RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Microchip Technology.
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Authorised distributors including Newark Electronics and Farnell have stock available or on a lead time for MIC2179YSM.
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