MIC2124 _ BDTIC a Leading Distributor in China

MIC2124

The Micrel MIC2124 is a member of the Hyper Speed Control™ family of DC-DC controllers. It uses an adaptive on-time current mode control scheme and operates at a constant frequency.

The MIC2124 operates over a supply range of +3V to +18V, and is independent of the IC supply voltage V_IN. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current. The output voltage is adjustable down to +0.8V.

The MIC2124 includes an EN/COMP pin that can be pulled low to shut down the converter. The MIC2124 optimizes performance and ensures stability with external compensation.

The UVLO is provided to ensure proper operation under power-sag conditions and to make sure that the external power MOSFET has enough voltage to work with. An internal digital soft-start ensures reduced inrush current. Cycle-by-cycle current limiting ensures FET protection.

The MIC2124 is available in a 10-pin MSOP package with a junction temperature operating range from -40°C to +125°C.

Features

+3V to +18V input voltage
25A output current capability
Any Capacitor™ stable
Zero ESR to high ESR
Output down to 0.8V with ±1% FB accuracy
Up to 94% efficiency
300kHz switching frequency
All N-Channel MOSFET design
Shutdown feature with EN/COMP
No current-sense resistor needed
Internal 4ms digital soft-start
Thermal shutdown
Pre-bias output safe
Cycle-by-Cycle foldback current-limit protection
10-pin MSOP package
-40°C to +125°C junction temperature range

Parameter

Parameter Name Value	Value
Supported Topologies Sync. Buck	Sync. Buck
Supported Outputs 1	1
Minimum Input Voltage (V) 3	3
Maximum Input Voltage (V) 18	18
Minimum Output Voltage (V) 0.8	0.8
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.91	0.91
Operating Frequency (Hz) 300K	300K
Soft Start True	True
Internal Voltage Bias True	True
Enable Pin True	True
Current Limit / Short Circuit Protection True	True
Input UVLO Typ (V) 2.7	2.7
Operating Supply Current (mA) 1.4	1.4
Iq Off (µA) 1	1
Package 10/MSOP	10/MSOP