XCM517 NEW

General Description

The XCM517 series is a multi combination module IC which comprises of two 600mA driver transistor built-in synchronous step-down DC/DC converter. The XCM517 series is available in an ultra small package USP-12B01 suited for space conscious applications. The XCM517 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42OP-channel driver transistor and 0.52ON-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs enable a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected externally. Operating voltage range is from 2.7V to 6.0V. With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application. As for operation mode, the XCM517xA / XCM517xB series are PWM control, the XCM517xC / XCM517xD series are automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0µA or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.4V or lower.

Features

• P-ch Driver Transistor Built-In : ON resistance 0.42Ω
• N-ch Driver Transistor Built-In : ON resistance 0.52Ω
• Input Voltage Range : 2.7V ~ 6.0V
• High Efficiency : 92% (TYP.)
• Output Current : 600mA
• Oscillation Frequency : 1.2MHz, 3.0MHz (+15%)
• Maximum Duty Cycle :100%
• Soft-Start Circuit Built-In
• Current Limiter Circuit Built-In (Constant Current & Latching)
• Ceramic Capacitor Compatible
• Control Methods : PWM (XCM517xA / XCM517xB), PWM/PFM Auto (XCM517xC / XCM517xD)
• Ultra Small Package : USP-12B01

Applications

• Mobile phones, Smart phones
• Bluetooth equipment
• Personal Device Assistances
• Portable games
• Digital still cameras, camcorders

Typical Application Circuit