Datasheet XCL303, XCL304 (Torex)

XCL303/XCL304
Series ETR28016-001 Inductor Built-in Negative Output Voltage “micro DC/DC” Converters ☆Green Operation Compatible ■GENERAL DESCRIPTION The XCL303/XCL304 series are small coil-integrated negative voltage micro DC/DC converter IC. The oscillating frequency is a fast 2.5MHz and the small 2.5 x 2.0 x 1.0mm package contributes significantly to space saving in PCB area. Further, integrating the coil together with the DC/DC simplifies the circuit board layout and minimizes potential noise interference. Compared to a charge pump type solution, the switching method of the XCL303/XCL304 maintains a stable output voltage even when the input voltage fluctuates. In addition, this new micro DC/DC can support larger output current than a charge pump solution. The PWM controlled XCL303 series can be selected for applications where low noise is important, and the PWM/PFM automatic switching controlled XCL304 series can be selected for applications where high efficiency at light load current and low noise at high load current is important. The XCL303/XCL304 series allows users to select either a PWM control or PWM/PFM automatic switching control method, which are optimum for applications where low noise and high efficiency are important. Output voltage can be adjusted within the range of -1.2V to -6.0V using externally mounted resistors. ■ ■ FEATURES APPLICATIONS Input Voltage Range : 2.7V ~ 5.5V ● Negative power supply for Optical transceiver Output Voltage Range : -1.2V ~ -6.0V ● Negative power supply for AMP FB Voltage 0.5V ± 10mV ● Negative power supply for LCD VREF Voltage 1.6V ± 40mV Output Current : 300mA @V OUT=-3.0V, VIN=3.3V(TYP.) ● Negative power supply for CCD Quiescent Current : 250μA (TYP.) ● General purpose Negative power supply Control Methods : PWM Control (XCL303 Series) : PWM/PFM Control (XCL304 Series) Oscillation Frequency : 2.5MHz Protection Function : Current Limit (1.1A TYP.) Function : Soft Start Time External Adjustment UVLO Operating Ambient Temperature : -40 ~ +105℃ Packages : CL-2025-02 (2.5 x 2.0 x 1.0mm) Environmentally Friendly : EU RoHS Compliant, Pb Free ■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE CHARACTERISTICS XCL303/304 (VIN = 3.7V, VOUT = -3.3V) CIN=10μF(GRM188D71A106KA73),CL=10μF(GRM188D71A106KA7) SD=PMEG2010BELD, RFB1=150kΩ, RFB2=43kΩ 7 SD L1 1 L VIN 6 x RFB1 CIN 2 GND 5 FB RFB2 CL 3 VREF CE 4 L2 CVREF 8 1/24