XC9519 Series ETR0710-009 Dual Output Step-Up/Inverting DC/DC Converter GENERAL DESCRIPTION The XC9519 series is a 2 channel (step-up and inverting) DC/DC converter IC. One DC/DC converter is a step-up DC/DC and the other is an inverting DC/DC converter. The step-up converter compares a built-in reference voltage 1.0V to the FBP voltage (accuracy 1.5%) and a positive output voltage can be set freely with the external components up to 18V. The inverting DC/DC converter compares a difference between a reference voltage and the FBN voltage (accuracy 1.5%) to the GND, then a negative output voltage can be set until -15V with the external components. With a 1.2MHz frequency, the size of the external components can be reduced. As for operation mode, the device can be selected to use PWM control or automatic PWM/PFM switching control by the MODE pin. In the automatic PWM/PFM switching control mode, control switches from PWM to PFM during light loads. The series is highly efficient from light loads through to large output currents. In the PWM control mode, noise is easily reduced since the frequency is fixed. The control mode can be selected for each application. The soft start and current control functions are internally optimized. During stand-by, all circuits in the IC are shutdown to reduce current consumption to as low as 1.0A or less. The device includes a gate control pin for the P-channel MOSFET which is used for a load disconnection at the stand-by mode. The GAINP and GAINN pins are used for loop compensation in order to optimize load transient response. With the built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 2.2V or lower. FEATURES APPLICATIONS Input Voltage : 2.7V ~ 5.5V AMOLED Output Current : 500mA V =3.7V, V =5.0V, V =-5.0V IN OUTP OUTN (*1) o - Smartphones Positive Output Voltage : 4.0V ~ 18.0V (accuracy 1.5% 25 C) (*2) o Negative Output Voltage : -15.0V ~ -4.0V (accuracy 1.5% 25 C) - Tablet PCs Oscillation Frequency : 1.2MHz - Automotive navigation systems Soft-Start Circuit Built-In : Step-up DC/DC converter 2.5ms (TYP.) CCD image sensors : Inverting DC/DC converter 2.2ms (TYP.) - Surveillance cameras Protection Circuits : Over Current Limit (Integral Latching) Short Protection Latching e-paper UVLO -e-Books Thermal Shutdown Over Voltage Protection Function Addition : Control Pin Load disconnect Pin Phase Compensation Pin Ceramic Capacitor Compatible Operating Ambient Temperature : -40 ~ +85 Package : QFN-24 Environmentally Friendly : EU RoHS Compliant, Pb Free *1V V + 0.2V (V :Positive output voltage range) OUTPSET IN OUTPSET *2V - V + V 21.0V IN OUTNSET FN (V : Forward voltage of SBD , V : Nagative output voltage range) FN N OUTNSET TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS V =5.0V, V =-5.0V, I =I OUTP OUTN OUTP OUTN C , C =44.7F, L , L =3.3H (VLF5014S-3R3M2R0), SBD , SBD : CMS03 LP LN P N P N P-ch MOS: EMH1303, R =7.5k, C =4.7nF, R =130k, C =0.47nF ZP ZP ZN ZN L SBD P P V OUTP 100 C FBP V ,V ENP ENN R FBP1 SWP LXP VOUTP P-ch MOS R C SP LP BSW FBP 80 PVIN VREF V = 4.4V RFBN2 CL VR R IN FBP2 60 AVIN 3.6V ENP FBN XC9519 2.7V R FBN1 40 V C C C ENN MODE IN IN SW IN P IN A VOUTN VOUTN AGND SBD N 20 PGND LXN PWM/PFM (V ) MODE PWM (V ) MODE C GAINP GAINN LN 0 R R L ZP ZN N 0.1 1 10 100 1000 C C ZP ZN Output Current:I , I (mA) OUTP OUT N 1/38 Efficiency:EFFI(%)Internal ON/OFF Controller XC9519 Series BLOCK DIAGRAM * Diodes inside the circuit are an ESD protection diode and a parasitic diode. PRODUCT CLASSIFICATION Ordering Information XC9519- DESIGNATOR ITEM SYMBOL DESCRIPTION UVLO Detect Voltage 2.2V UVLO Detect Voltage A UVLO Hysteresis width 0.2V Oscillation Frequency 12 1.2 MHz Maximum Current Limit A 2.0A (*1) (*2) - Package (Order Unit) ZR-G QFN-24 (1,000/Reel) (*1) The -G suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. (*2) The XC9519 reels are shipped in a moisture-proof packing. 2/38