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MIC2176-3

Micrel Semiconductor
Part Number MIC2176-3
Manufacturer Micrel Semiconductor
Description Wide Input Voltage Synchronous Buck Controller
Published Aug 13, 2014
Detailed Description MIC2176-1/-2/-3 Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control Hyper Speed Control™...
Datasheet PDF File MIC2176-3 PDF File

MIC2176-3
MIC2176-3

Overview
MIC2176-1/-2/-3 Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control Hyper Speed Control™ Family General Description The Micrel MIC2176-1/-2/-3 is a family of constant-frequency, synchronous buck controllers featuring a unique digitally modified adaptive ON-time control architecture.
The MIC2176 family operates over an input supply range of 4.
5V to 75V and can be used to supply up to 15A of output current.
The output voltage is adjustable down to 0.
8V with a guaranteed accuracy of ±1%, and the device operates at a constant switching frequency of 100kHz, 200kHz, and 300kHz.
Micrel’s Hyper Speed ControlTM architecture allows for ultrafast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible.
This digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.
The MIC2176 offers a full suite of protection features to ensure protection of the IC during fault conditions.
These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, “hiccup” mode shortcircuit protection and thermal shutdown.
All support documentation can be found on Micrel’s web site at: www.
micrel.
com.
Features • Hyper Speed ControlTM architecture enables - High delta V operation (VIN = 75V and VOUT = 1.
2V) - Small output capacitance 4.
5V to 75V input voltage Output down to 0.
8V with ±1% accuracy Any CapacitorTM Stable - Zero-ESR to high-ESR output capacitance 100kHz/200kHz/300kHz switching frequency Internal compensation 6ms Internal soft-start Foldback current limit and “hiccup” mode short-circuit protection Thermal shutdown Supports safe start-up into a pre-biased output –40°C to +125°C junction temperature range Available in 10-pin MSOP package • • • • • • • • • • • Applications • Distributed power systems • Netwo...


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