MIC26400 Datasheet | Micrel Semiconductor

5A Hyper Speed Control TM Synchronous DC/DC Buck Regulator Super Switcher IITM General Description The Micrel MIC26400 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26400 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 5A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300k Hz. Micrel’s Hyper Speed Control TM architecture allows for ultrafast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This digitally modified adaptive t ON ripple control architecture bines the advantages of fixed frequency operation and fast transient response in a single device. The MIC26400 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, foldback current limit, “hiccup” mode shortcircuit protection and thermal shutdown. All support documentation can be found on Micrel’s web site at: .micrel.. Features - Hyper Speed Control TM architecture enables - High delta V operation (VIN = 26V and VOUT = 0.8V) - Small output capacitance - 4.5V to 26V input voltage - Adjustable output from 0.8V to 5.5V (±1% accuracy) - Any Capacitor TM Stable - Zero ESR to high-ESR output capacitance - 5A output current capability - 300k Hz switching frequency - Internal pensation - Up to 95% efficiency - 6ms Internal soft-start - Foldback current limit and “hiccup” mode short-circuit protection - Thermal shutdown - Supports safe start-up into a pre-biased load - - 40°C to +125°C junction temperature range - 28-pin 5mm × 6mm MLF® package Applications - Distributed power systems - munications/networking infrastructure -...