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RM34063 Dataheets PDF



Part Number RM34063
Manufacturers REACTOR
Logo REACTOR
Description DC/DC CONVERTER CONTROLLOR
Datasheet RM34063 DatasheetRM34063 Datasheet (PDF)

DESCRIPTION The RM34063 by Analog Integrations Corporation, an improved second source over the industrial standard RM34063, is a monolithic control circuit containing the primary functions required for DC/DC converters.The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This device is specifically designed to be incorporated in stepdown, step-up and voltage-.

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DESCRIPTION The RM34063 by Analog Integrations Corporation, an improved second source over the industrial standard RM34063, is a monolithic control circuit containing the primary functions required for DC/DC converters.The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This device is specifically designed to be incorporated in stepdown, step-up and voltage-inverting applications with a minimum number of external components. The ±1.8% internal reference and low quiescent current of 2.4mA are among the improvements of the device over the competition. RM34063 DC/DC CONVERTER CONTROLLOR FEATURES •3V to 40V Input Voltage Operation •Internal 1.2A Peak Current Switch •Internal ±1.8% Reference •Low Quiescent Current at 2.4mA •Frequency Operation from 100Hz to 100KHz. •Current limit Applications •Saver for Cellular phones •DC-DC Converter Module TYPICAL APPLICATION +5V_800mA L1 220uH_1.5A + C2 D1 470uF_10V IN5819 CT 470pF U1 1 SC 2 SE 3 TC 4 GND DRI 8 IPK 7 Vcc 6 FB 5 RM34063 RS 0.33_1% +Vin + C1 470uF RA 4.5K_1% C1 22nF RB 1.5K_1% Note: VOUT = VFB x (1+RA/RB) . VFB=1.25V www.reactor-micro.com Version:1.1 1 RM34063 PACKAGE INFORMATION TOP VIEW U1 6 Vcc SE 2 1 SC 8 DRI TC 3 FB 5 7 IPK GND 4 RM34063 SOP-8L PIN FUNCTIONS Pin Symbol Function Description 1 SC 1.5A switch collector 2 SE Darlington switch emitter 3 TC Oscillator timing capacitor 4 GND Power GND 5 FB Feedback comparator inverting input 6 VCC VCC - Power supply input 7 IPK IPK -High-side current sense input,VCC -VIPK=300mV 8 DRI Drive collector www.reactor-micro.com Version:1.1 2 ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................…………............... ...................... 40V Comparator Input Voltage Range ..................................………….................... -0.3V~40V Switch Collector Voltage .......................................…………….....................................40V Switch Emitter Voltage ..................................……………............................................40V Switch Collector to Emitter Voltage .....................…………..........................................40V Driver Collector Voltage .................................……………............................................40V Switch Current ............................................……………..............................................1.2A Power Dissipation and Thermal Characteristics DIP Package Ta= 25℃ ...............................…………............... ……................. ……......................1.0W Thermal Resistance .................……….................... ……................. ……...........100℃ /W SO Package Ta= 25℃.................................……………......... ……................. ……...................625mW Thermal Resistance .................……………................. ……................................160℃/W Operating Junction Temperature ................................………..….............................125℃ Operating Ambient Temperature Range .................……...….............................0℃~70℃ Storage Temperature Range .....................……………....…........................ - 65℃~150℃ ELECTRICAL CHARACTERISTICS (VCC= 5V, Ta=25℃, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Oscillator Charging Current ICHG VPIN7=VCC ,VCC=40V 23 32.0 41.0 μA Discharge Current Discharge To Charge Current Ratio Frequency of Oscillation Current Limit Sense Voltage Output Switch IDISCHG K Fosc VIPK VPIN7=VCC,VCC=40V VPIN7=VCC,VCC=40V CT=0.001uf,VCC=5V ICHG=IDISCHG,VCC=5V 140 190 260 μA 5.4 6.3 7.4 26 33 44 kHz 250 300 350 mV Saturation Voltage, Darlington Connection Saturation Voltage DC Current Gain Collector Off-State Current Comparator VCES1 VCES2 hFE IC(off) ICT1=1.0A,VCT1=VCT2 ICT1=1.0A, RPIN8=82Ω, VCT1=+5V, ICT1=1.0A,VCET1=5V VCET1=40V 0.10 0.90 1.20 0.10 0.45 0.70 50 120 260 0.01 10.0 V V μA www.reactor-micro.com Version:1.1 3 RM34063 Threshold Voltage Threshold Voltage Line Regulation Input Bias Current Overall Voltage Source Current VTH ΔVTH IIB ICC BLOCK DIAGRAM VCC=40V,VCC=5V VCC=40V,VCC=5V VI=0V VCC=5~40V,CT=0.001μF, VPIN7=VCC ,VPIN5>VTH, PIN to GND 1.228 1.250 1.272 1.5 5.0 0.01 0.4 V mV μA 1.0 2.4 4.0 mA www.reactor-micro.com Version:1.1 4 ■APPLICATION INFORMATION •DESIGN FORMULA TABLE Calculation Step-down Step-up Voltage-inverting ton t off ( )ton + toff MAX VOUT + VF VIN − VSAT − VOUT 1 FMIN VOUT + VF − VIN (MIN ) VIN (MIN ) − VSAT 1 FMIN VOUT + VF VIN − VSAT 1 FMIN CT 4 ×10−5 ton 4 ×10−5 ton 4 ×10−5 ton IC (SWITCH ) 2IOUT (MAX ) 2 I out ( MAX ) ( ton + toff toff ) 2 I out ( MAX ) ( ton + toff toff ) RS 0.33 0.33 0.33 IC (SWITCH ) IC (SWITCH ) IC (SWITCH ) L(MIN ) ⎜⎛ VIN (MIN ) − VSAT − VOUT ⎜⎝ IC (SWITCH ) ⎟⎟⎠⎞ton ( MA ⎜⎛ VIN (MIN ) − VSAT ⎜⎝ IC(.


LP156WF6-SPB1 RM34063 MS9295


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