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MIC26603/903/1203 Buck Regulators


28 V 6 A/9 A/12 A Hyper Light Load® synchronous DC/DC buck regulator family SuperSwitcher IIG™ from Micrel


Micrel's MIC26603/903/1203 Buck RegulatorsMicrel's MIC26603/903/1203 are synchronous DC/DC buck regulators featuring adaptive on-time control architecture. The MIC26603/903/1203 family operates over an input supply range of 4.5 V to 28 V. An internal linear regulator provides a regulated 5 V to power the internal control circuitry. The MIC26603/903/1203 operate at a constant 600 kHz switching frequency in continuous-conduction mode and can be used to provide up to 12 A of output current. The output voltage is adjustable down to 0.8 V with a guaranteed accuracy of ±1%. Micrel’s HyperLight Load® architecture provides the same high-efficiency and ultra-fast transient response as the Hyper Speed Control™ architecture under medium to heavy loads, while maintaining high efficiency under light load conditions by transitioning to variable-frequency, discontinuous-mode operation. Devices in this product family are available in a 28-pin 5 mm x 6 mm MLF® package.

Features
  • HyperLight Load® efficiency – up to 80% at 10 mA
  • Hyper Speed Control™ architecture enables
    • High delta V operation (VIN = 28 V and VOUT = 0.8 V)
    • Small output capacitance
  • Adjustable output voltage from 0.8 V to 5.5 V
  • Foldback current-limit and "hiccup mode" short-circuit protection
  • Any Capacitor™ stable zero-to-high ESR
  • –40°C to +125°C junction temperature range
  • Input voltage range: 4.5 V to 28 V
  • ±1% FB accuracy
  • Up to 95% Efficiency
  • 600 kHz switching frequency
  • Power Good (PG) output
  • Safe start-up into pre-biased loads
  • 28-pin 5 mm x 6 mm MLF® package
  • 6, 9, and 12 A output currents available

Digi-Key P/N Manufacturer P/N Description Current - Output  
576-3954-1-ND MIC261203YJL TR IC REG SYNC DC-DC BUCK 28V 28MLF 12 A Datasheet
576-3956-1-ND MIC26603YJL TR IC REG SYNC DC-DC BUCK 28V 28MLF 6 A Datasheet
576-3958-1-ND MIC26903YJL TR IC REG SYNC DC-DC BUCK 28V 28MLF 9 A Datasheet