Catalog
29V/12A Hyper Light Load™ DC-DC Buck Regulator
Key Features
• * HyperLight Load® efficiency - up to 80% at 10mA
• * Hyper Speed Control™ architecture enables
• * High delta V operation (VIN = 19V and VOUT = 0.8V)
• * Small output capacitance
• * Input voltage range: 4.5V to 19V
• * Output current up to 12A
• * Up to 95% efficiency
• * Adjustable output voltage from 0.8V to 5.5V
• * ±1% feedback accuracy
• * Any Capacitor™ stable - zero-to-high ESR
• * 600kHz switching frequency
• * Power Good (PG) output
• * Foldback current-limit and "hiccup" mode short-circuit protection
• * Safe start-up into pre-biased loads
• * -40°C to +125°C junction temperature range
• * Available in 28-pin 5mm — 6mm QFN package
Description
AI
The MIC24056 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The MIC24056 operates over a supply range of 4.5V to 19V. It has an internal linear regulator which provides a regulated 5V to power the internal control circuitry. MIC24056 operates at a constant 600kHz switching frequency in continuous-conduction mode and can be used to provide up to 12A of output current. The output voltage is adjustable down to 0.8V.
HyperLight Load® architecture provides the same high efficiency and ultra-fast transient response as the Hyper Speed Control™ architecture under medium to heavy loads, but also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous mode operation.
The MIC24056 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, thermal shutdown, internal soft start to reduce the inrush current, foldback current-limit and "hiccup" mode short-circuit protection. The MIC24056 includes a power good (PG) output to allow simple sequencing. The 12A Hyper Speed Control™ part, MIC24055, is also available.