MIC2126

Micrel's MIC2125 and MIC2126 are constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2125/6 operates over an input voltage range from 4.5V to 28V and can be used to supply load current up to 25A . The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 650kHz.

Micrel's HyperLight Load® architecture provides the same high efficiency and ultra-fast transient response as the Hyper Speed Control® architecture under the medium to heavy loads. It also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous conduction mode operation.

The MIC2125/6 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, "hiccup" mode short-circuit protection, and thermal shutdown.

Features
  • Hyper Speed Control® architecture enables:
  • High delta-V operation (VIN = 28V and VOUT = 0.6V)
  • Any Capacitor™ stable
  • 4.5V to 28V input voltage
  • Adjustable output voltage from 0.6V to 24V
  • 200kHz to 650kHz programmable switching frequency
  • HyperLight Load® (MIC2125)
  • Hyper Speed Control® (MIC2126)
  • Enable input and power good output
  • Built-in 5V regulator for single-supply operation
  • Programmable current limit and "hiccup" mode short-circuit protection
  • 7ms internal soft-start, internal compensation, and thermal shutdown
  • Supports safe start-up into a pre-biased output
  • -40°C to +125°C junction temperature range
  • Available in 16-pin 3mm x 3mm QFN package
Parameter
Parameter Name Value Value
PFM, Discontinuous, Hyperlight load, or Skip Mode False False
External Clock Sync False False
Power Good Signal False False
Soft Start False False
Internal Compensation False False
Internal Voltage Bias False False
Enable Pin False False
Current Limit / Short Circuit Protection False False
Documents
MIC2125/6 - 28V, Synchronous Buck Controllers Featuring Adaptive ON-Time ControlData Sheets12/08/20152308KB
MIC2125Silicon Product12/21/20150B
MIC2125/6 Demonstration Board User's GuideUser Guides12/08/20151038KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2126YML-T516VQFN-40C to +85CT/R2.592.151.961.631.51
MIC2126YML-TR16VQFN-40C to +85CT/R1.521.271.151.111.10
相关开发工具
MIC2125/6 - 28V, Synchronous Buck Controllers Featuring Adaptive ON-Time Control MIC2126
MIC2125/6 - 28V, Synchronous Buck Controllers Featuring Adaptive ON-Time Control MIC2126YML-20A-EV
MIC2125/6 Demonstration Board User's Guide MIC2126YML-20A-EV