RCR2821 KEXIN | Alldatasheet

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□ □ Package Type SK: SOT23-5L；SM: SOT89 Output Voltage Indicate the product number Parameter Symbol Ratings Unit Output Voltage V OUT -0.3 to +10 V LX Pin Voltage V LX -0.3 to +10 V EN Pin Voltage EN -0.3 to +10 V LX Pin Output Current I LX 1 A SOT23-5L 250 Power Dissipation ( T A = 25℃) PD SOT89 500 mW Operating Temperature Range T OPR -40 to 125 ℃ Storage Temperature Range T STG -65 to 150 ℃ SMD Type IC www.kexin.com.cn RCR2821 Functional Block Diagram Absolute Maximum Ratings

Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage Accuracy ΔV OUT -2 -- +2 % Input Voltage V IN -- -- 10 V Start-up Voltage V ST I OUT = 1mA, V IN : 0 to 2V -- 0.85 1.0 V Hold-on Voltage V HO I OUT = 1mA, V IN Efficiency EFFI -- 75 85 % V OUT ≤ 3.5V -- 30 40 Input Current1 3.5V ＜V OUT ≤ 5V I SS1 To be measured at V IN at no load -- 50 60 μA V OUT ≤ 3.5V -- 5 8 Input Current 2 3.5V＜V OUT ≤5V I SS2 To be measured at V OUT in switch off condition -- 6 10 μA LX Switch_ ing Current I SWITCHING V LX = 0.4V 100 200 -- mA EN “H” Level V SH V OUT = V OUT T × 0.9 0.75 -- -- V EN “L” Level V SL V OUT = V OUT T × 0.9 -- -- 0.3 V EN “H” Input Current I SH V EN = 10V -- -- 0.1 μA EN “L” Input Current I SL V EN Maximum Oscillator F MAX 80 120 160 KHz Oscillator Duty Cycle D OSC On ( V LX ”L” ) side 70 78 85 % Note1. V OUT T = Specified output Voltage. Note2. Unless otherwise provided, V IN = 1.8V, V SS = 0V, I OUT = 10mA, T OPT = 25℃ Note3. Unless otherwise provided, V IN = 3V, V SS = 0V, I OUT = 10mA, T OPT = 25℃ NO EN SMD Type IC www.kexin.com.cn RCR2821 Electrical Characteristics TA = 25 , unless otherwise specified Typical Application Circuit

Components: Inductor: 47uH, Diode: 1N5818 Output Capacitor:47uF/16V (Tantalum ) 1、 RCR2821-30 ： 2、 RCR2821-33 ： Figure1. Output Voltage VS Output Current Figure2. Efficiency VS Output Current Figure3. Output Voltage VS Output Current Figure4. Efficiency VS Output Current SMD Type IC www.kexin.com.cn RCR2821 Typical Performance Characteristics

Figure5. Output Voltage VS Output Current Figure6. Efficiency VS Output Current SMD Type IC www.kexin.com.cn RCR2821