XC9110/XC9111 Series ETR0406-006a PFM Controlled Step-Up DC/DC Converter / Controller ICs GENERAL DESCRIPTION The XC9110/9111 series is a group of PFM controlled step-up DC/DC converter/controller ICs designed to generate low supply voltage by the combination of PFM control and CMOS structure. The series is ideal for applications where a longer battery life is needed such as in portable communication equipment. With a built-in 2.5N-channel driver transistor, the XC9110A/C/E and XC9111A/C/E types provide a step-up operation by using only a coil, a capacitor, and a diode connected externally. The XC9110/9111B, D and F versions can be used with an external transistor for applications requiring larger currents. Output voltage is internally programmable in a range from 1.5V to 7.0V in increments of 0.1V (accuracy:2.5%). Maximum oscillation frequency is set to 100kHz for XC9110/9111 series. (At light loads, it is set to 180kHz for the XC9111 series.) Options include products equipped with a CE pin (C and D versions) that allows the IC to be shut down thereby reducing supply current and with separated VDD/VOUT pins (E and F versions) to separate the power supply block and the output voltage detect block. With the XC9110 series, maximum duty cycle is set to 75% (V =3.3V) making it suitable for DD use with large current operations. The XC9111 series automatically switches duty ratio between 56% & 75% (V =3.3V) DD when it senses changes in load to drop output ripple voltage and can support both large and small currents. The external transistor types (B/D/F types) can be provided for applications, which require larger currents. APPLICATIONS FEATURES Mobile phones Operating (Input) Range : 0.9V ~ 10.0V Output Voltage Range : 1.5V~7.0V in 0.1V increments Various palm top equipment Output Accuracy : 2.5% Cameras, VCRs Max Oscillation Frequency : 100 kHz 15% Various portable equipment 180 kHz (at 56% duty of XC9111) Built-in Switch Types : A/C/E type N-ch FET On-Resistance : 2.5 V =3.0V DD External Transistor Types : B/D/F type Lx Limit Voltage : E type: more than V =2.0V DD : A/C type: more than V =2.0V OUT Max Duty Cycles : 75% (for XC9110) : 56%/75% two steps (for XC9111) Low Supply Current : 2.0A V =3V OUT Operating Ambient Temperature: -40+85 Packages : SOT-23 ,SOT89 (for XC9111), SOT-25, USP-6C Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS C type circuit XC9111E331MR L=100H(CR54), CL47F(Tantalum) SD: XBS104S14R-G 100 54 L 80 (TOP VIEW) 3.0V SOT-25 2.4V 60 VIN CIN + 23 1 1.5V VOUT 40 1.2V + VIN=0.9V SD CL 20 (Tantalum) 0 GND 0 5 0 1 00 150 200 250 300 CE Output Current:IOUT(mA) 1/36 Efficiency:EFFI(%) XC9110/XC9111 Series PIN CONFIGURATION Lx/EXT VSS 54 12 3 CE/VOUT VOUT/VDD NC SOT-23 (TOP VIEW) USP-6C (BOTTOM VIEW) SOT-25 (TOP VIEW) *The dissipation pad for the USP-6C package SOT-89 (TOP VIEW) should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the pin No.1. PIN ASSIGNMENT XC9111A/B PIN NUMBER PIN NAME FUNCTIONS SOT-23 SOT-89 A B A B 1 1 1 1 VSS Ground 3 3 2 2 VOUT Output Voltage Montior, Internal Power Supply 2 - 3 - LX Switch - 2 - 3 EXT External Switching transistor drive <N-ch transistor drive) XC9110//9111C/D/E/F PIN NUMBER PIN NAME FUNCTIONS SOT-25 USP-6C C D E F C D E F - - 2 2 - - 1 1 VDD Internal Power Supply 4 4 4 4 6 6 6 6 VSS Ground External switching transistor drive - 5 - 5 - 4 - 4 EXT <Connect to the gate pin of N-ch Power MOSFET> 5 - 5 - 4 - 4 - Lx Switch Chip Enable <Connect to the VOUT pin when Active and the 1 1 - - 3 3 - - CE VSS pin when stand-by> 2 2 1 1 1 1 3 3 VOUT Output voltage monitor 3 3 3 3 2,5 2,5 2,5 2,5 NC No connection 2/36