® RCR2562 PFM Step-up DC/DC Converter z battery-powered instruments. Features • Low Start-up Voltage, 1.1V at 1mA Consists of an oscillator, a PFM control circuit, a driver Pin • Minimal Number of External Components ( Only an Inductor, EXT to external MOSFET, a reference voltage unit, an error a Diode, a MOSFET and two Capacitors ) amplifier. A low ripple and high efficiency step-up DC/DC •Adjustable version ( VREF = 1.25V VREF = 2.7V or VREF = 3.3V ) converter can be constructed of this RCR2562 IC with only six • Ultra Low Input Current ( 12μA at Switch Off ) external components. • ±2% High Output Voltage Accuracy The RCR2562 works on ultra low start-up voltage, typically • Low Ripple and Low Noise max start-up voltage less than 1.1V at 1mA load current • 75% Efficiency with Low Cost Inductor • SOT23-5L Small Packages z Applications • Battery-powered equipment z • Cameras, Camcorders, VCRs, PDAs, pagers, electronic General Description The RCR2562 Series are PFM Step-up DC/DC ICs with ultra data banks, and hand-held communication equipment low supply current by CMOS process and suitable for use with z Package Information ③ ④ ② ① ⑤ Units:mm 1 /7 ISPD-V3.1 ® RCR2562 z Pin Configurations Pin Port SOT23-5L ① FB ② VIN ③ NC ④ GND ⑤ EXT z Functional Block Diagram z Ordering Information RCR2562 - □□□ □□ Package Type SK: SOT23-5L Reference Voltage 125= 1.25V; 270= 2.70V; 330= 3.30V Indicate The Product Number z Absolute Maximum Ratings Parameter Symbol Ratings Unit Output Voltage VOUT -0.3 to 10 V EXT Pin Voltage VEXT -0.3 to 10 V EXT Pin Current ( 2 ) IEXT ±30 mA 250 mW Power Dissipation ( TA = 25℃ ) PD Operating Temperature Range TOPR -40 to +125 ℃ Storage Temperature Range TSTG -65 to +150 ℃ 2 /7 ISPD-V3.1 ® RCR2562 z Electrical Characteristics TA = 25℃, unless otherwise specified Parameter Symbol Output Voltage Accuracy Input Voltage VFB Voltage Start-up Voltage Input Current2 Max Unit ΔVOUT -2 -- +2 % VIN -- -- 10 V RCR2562 - 125SK 1.22 1.25 1.28 V RCR2562 - 270SK 2.65 2.70 2.75 V RCR2562 - 330SK 3.24 3.3 3.36 V -- 1.0 1.1 V -- 75 -- -- 85 -- -- 30 40 -- 50 60 -- 6 12 VOUT ≤3.5V -1.5 -- -- -2 -- -- 1.5 -- -- 2 -- -- 80 120 160 kHz 70 78 85 % ISS To be measured at VIN at no load ISWITCHING To be measured at VOUT in switch off condition VOUT ＞ 3.5V VOUT ≤ 3.5V VOUT ＞ 3. 5V EXT“H”Output Current VOUT ≤3.5V EXT“L”Output Current VOUT ≤ 3.5V IOUT = 1mA, VIN : 0 to 2V EFFI VOUT ＞ 3.5V Input Current1 Typ VST VOUT ≤ 3.5V Efficiency Min VFB Test Conditions VOUT ＞ 3. 5V VOUT ＞ 3. 5V ISH ISL Maximum Oscillator FMAX Oscillator Duty Cycle DOSC VEXT = VOUT - 0.4V VEXT = 0.4V On (VLX ”L” ) side % μA μA mA mA Note1 Vout（T）= Specified output Voltage. Note2 Unless otherwise provided, VSS = GND, IOUT = 10mA, Note3 MOSFET: RCR1516 z Typical Application Circuit ( VOUT = 5V ) Components : Inductor : 47uH, Diode : 1N5818, Input Capacitor : 1uF/10V ( Tantalum ) NMOS : RCR1516 Output Capacitor : 47uF/16V ( Tantalum ) 3 /7 ISPD-V3.1 ® RCR2562 z Typical Performance Characteristics 1、 RCR2562 ( When VOUT = 5V ) : START-UP Voltage (v) 2.0 RCR1513SI 1.8 xx151 1.6 1.4 RCR1516 1.2 1.0 0.8 0 20 40 60 80 100 120 Output Current(mA) Figure1.Start-up Voltage VS Output Current 2、 RCR2562-125、RCR2562-27 ( VOUT = 3.0V ) : Figure2. Output Voltage VS Output Current Figure3. Efficiency VS Output current 3、 RCR2562 ( VOUT = 3.3V ) ： 4 /7 ISPD-V3.1 ® RCR2562 Figure4. Output Voltage VS Output current Figure5. Efficiency VS Output current 4、 RCR2562 ( VOUT = 5.0V ) ： Figure6. Output Voltage VS Output current 5 /7 ISPD-V3.1 ® RCR2562 5、Efficiency VS. Output Current: Figure7. Efficiency VS Output current 6 /7 ISPD-V3.1 ® RCR2562 DISCLAIMER INNOVA SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. INNOVA DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICIENCE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. 7 /7 ISPD-V3.1