LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board
Microsemi Proprietary and Confidential. User Guide Revision 1.0
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Product Description
The LX7186A is 1.4 MHz fixed frequency, current-mode, synchronous PWM buck (step-down) DC-to-DC
converter, capable of driving a 1 A load with high efficiency, and excellent line and load regulation. The
devices integrate synchronous P-channel and N-channel power MOSFET switches with low on-
resistance. They accept an input voltage range from 2.5 V to 5.5 V and will enter 100% duty cycle at
dropout making them ideal for powering portable equipment that runs from a single Li-ion battery.
A standard series of inductors (available from several different manufacturers) is optimized for use with
the LX7186A. This feature greatly simplifies the design of switch-mode power supplies.
The converter includes standard safety features, such as over-current, short-circuit, and thermal
shutdown protection. This device is available in SOT23-5L and UDFN 2x2 6L packages.
2.1
Applications
Datacom
Portable devices
Smart phone
2.2
Key Features
Input supply range: 2.5 V–5.5 V
Output adjustable from 0.6 V–~VIN
100% duty cycle in dropout
Integrated NMOS and PMOS switches
Current mode control
1 A maximum output current
Fixed 1.4 MHz frequency
High efficiency: up to 98%
Built-in soft-start
Built-in OV, UV, and OT protection
Built-in short circuit protection
RoHS-compliant and Halogen-free
SOT23-5L or UDFN 2x2 6L packages
