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R1212D SERIES STEP-UP DC/DC CONTROLLER NO.EA-109-111123 OUTLINE The R1212D Series are CMOS-based PWM step-up DC/DC converter controllers with low supply current. Each of the R1212D Series consists of ...
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BLOCK DIAGRAM Internal VR VIN VREFOUT VREFOUT UVLO Oscillator DTC EXT PWM Comp Latch Er.Amp AMPOUT DELAY SELECTION GUIDE The oscillator frequency, UVLO detector threshold, and oscillator maximum duty ...
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PIN CONFIGURATION SON-8 Bottom View Top View PIN DESCRIPTION Pin No Symbol Description 1 EXT External FET Drive Pin (CMOS Output) 2 GND Ground Pin 3 DTC Pin for Setting Maximum Duty Cycle and Soft sta...
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ABSOLUTE MAXIMUM RATINGS (GND=0V) Symbol Item Rating Unit VIN VIN Pin Voltage 6.5 V VEXT EXT Pin Output Voltage −0.3 to VIN+0.3 V VDLY DELAY Pin Voltage −0.3 to VIN+0.3 V VREFOUT VREFOUT Pin Voltage −...
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ELECTRICAL CHARACTERISTICS • R1212D100A Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 2.2 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Vo...
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• R1212D100B Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 2.2 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Voltage Line Regulation VIN: ...
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• R1212D101A Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 2.5 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Voltage Line Regulation VIN: ...
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• R1212D101C Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 2.5 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Voltage Line Regulation VIN: ...
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• R1212D102A Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 3.3 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Voltage Line Regulation VIN: ...
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• R1212D102C Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 3.3 5.5 V VFB VFB Voltage Tolerance VIN=3.3V 0.985 1.000 1.015 ΔVFB/ΔVIN VFB Voltage Line Regulation VIN: ...
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TYPICAL APPLICATIONS AND TECHNICAL NOTES Diode Inductor VOUT VIN EXT NMOS DELAY VFB C3 GND AMPOUT VREFOUT DTC LDR655312T-100(TDK) [R1212Dxxx A] LDR655312T-4R7(TDK) [R1212Dxxx B] Inductor LDR655312T-22...
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• Output Voltage Setting Method and Phase Compensation Making Method • The feedback voltage is controlled into 1.0V. The output voltage can be set with divider resistors for voltage setting, R1 and R2...
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Output Current and Selection of External Components <Basic Circuit> Inductor Diode IOUT VIN VOUT CL Lx Tr <Circuit through L> Discontinuous Mode Continuous Mode ILxmax ILxmax ILxmin ILxmin...
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In the continuous mode, the deviation of the current is equal between on time and off time. INOUTONIN ×−== L/Toff)VV(L/TV .................................................................................
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TIMING CHART <Soft-start Operation> The timing chart below describes the state of each pin from the power-on until the IC entering the stable operation. By raising the voltage of the DTC pin slo...
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<Latch Protection Operation> The operation of Latch protection circuit is as follows: When AMPOUT becomes "H" and the IC detects maximum duty cycle, charge to an external capacitor, C2...
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TEST CIRCUITS VIN EXT VIN EXT VREFOUT VREFOUT AMPOUT AMPOUT DTC DTC VFB VFB GND DELAY GND DELAY Fig.1 Consumption Current Test Circuit Fig.2 Oscillator Frequency, VFB Voltage, Duty Cycle, EXT rising t...
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VIN EXT VIN EXT VREFOUT VREFOUT AMPOUT AMPOUT DTC DTC VFB VFB GND DELAY GND DELAY Fig.7 DELAY Pin Detector Threshold Test Circuit Fig.8 UVLO Detector Threshold/Released Voltage Test Circuit VIN EXT VI...
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Diode Inductor VOUT VIN EXT NMOS DELAY VFB C3 GND AMPOUT VREFOUT DTC Fig.12 Output Current vs. Output Voltage/Efficiency, Response Characteristics Test Circuit LDR655312T-100(TDK) [R1212Dxxx A] LDR655...
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ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current (Topt=25°C) R1212D100A R1212D100A VOUT=5V VOUT=10V ut pu t V ol ...
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ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) Ef fic ie nc VOUT=5V VOUT=10V Output Current IOUT(m A) Output Current IOUT(m A) VOUT=15V ut pu t V ol ta ge T( V) 15.3 Ef fic ie nc Output Current IOU...
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Ef fic ie nc Ef fic ie nc Ef fic ie nc VOUT=15V VOUT=5V Output Current IOUT(m A) Output Current IOUT(m A) Ef fic ie nc Ef fic ie nc Ef fic ie nc VOUT=10V VOUT=15V Output Current IOUT(m A) Output Curre...
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sc illa to r F re qu en cy fo sc (k z) Fe ed ba ck ol ta ge FB (m Ef fic ie nc VOUT=15V Output Current IOUT(m A) 3) VFB Voltage vs. Input Voltage (Topt=25°C) 4) VFB Voltage vs. Temperature R1212D100x ...
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sc illa to r F re qu en cy fo sc (k z) sc illa to r F re qu en cy fo sc (k z) sc illa to r F re qu en cy fo sc (k z) Input Voltage VIN(V) 6) Oscillator Frequency vs. Temperature sc illa to r F re qu e...
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Su pp ly ur re nt ID (u A) Su pp ly ur re nt ID (u A) Su pp ly ur re nt ID (u A) 7) Supply Current vs. Input Voltage (Topt=25°C at no load) R1212D100A R1212D100B EXT at no load EXT at no load Input Vo...
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Su pp ly ur re nt ID (u A) R1212D EX is in Ti tr( ns EX "L " O es is ta nc e( VIN=5.5V, EXT at no load Temperature Topt(°C) 9) EXT "L" On Resistance vs. Temperature 10) EXT "H...
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ut yc le ut y( ut yc le ut y( ut yc le ut y( 13) Duty Cycle vs. DTC Voltage (0% to 100%) (Topt=25°C) R1212D100A R1212D100B CEXT=1000p F CEXT=1000p F DTC Voltage VDTC(V) DTC Voltage VDTC(V) ut yc le ut...
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AM "H " O ut pu t C ur re nt IA PL (m A) AM "L " O ut pu t C ur re nt IA PL (u A) ax du ty 15) Maxduty vs. Temperature R1212D101A R1212D101C CEXT=1000p F CEXT=1000p F Temperature T...
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LO et ec to r T hr es ho ld LO et ec to r T hr es ho ld EL AY in ha rg ur re nt ID LY 1( u A el ea se ol ta ge (V el ea se ol ta ge (V 18) UVLO Detector Threshold UVLO Released Voltage vs. Temperature...
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FO ol ta ge (m FO ol ta ge (V EL AY in is ch ar ge ur re nt ID LY 2( u A 21) DELAY Pin Discharge Current vs. Temperature 22) VREFOUT Voltage vs. Temperature R1212D10xx R1212D10xx VIN=2.2V, VDLY=0.1V V...
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ol ta ge (V ol ta ge (V ol ta ge (V 27) Power-on Response (VIN=3.3V, Topt=25°C) R1212D100A R1212D100A Set VOUT=5V, IOUT=10m A Set VOUT=5V, IOUT=100m A VIN VIN ut pu t V ol ta ge T( V) ut pu t V ol ta ...
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ol ta ge (V ol ta ge (V ol ta ge (V Set VOUT=5V, IOUT=10m A Set VOUT=5V, IOUT=100m A VIN VIN DTC DTC ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) Time (ms) Time (ms) ol t...
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ol ta ge (V ol ta ge (V ol ta ge (V Set VOUT=15V, IOUT=10m A Set VOUT=5V, IOUT=100m A VIN VIN Time (ms) Time (ms) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ol ta ge (V...
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ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) 28) Load Transient Response (VIN=3.3V, Topt=25°C) IOUT=1m A-30m A Time (ms) IOUT=10m A-100m A ut pu t V ol ta ge T( ...
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ut pu t C ur re nt IO T( R1212D100A A) ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) IOUT=10m A-100m A Time (ms) IOUT=1m A-30m A Time (ms) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) u...
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ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) IOUT=1m A-30m A Time (ms) IOUT=10m A-100m A 4.5 ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ut pu t V ol ta ge...
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ut pu t C ur re nt IO T( A) R1212D100B ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) IOUT=10m A-100m A Time (ms) IOUT=1m A-30m A Time (ms) ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) u...
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ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) IOUT=1m A-30m A Time (ms) IOUT=10m A-100m A 4.5 ut pu t V ol ta ge T( V) ut pu t V ol ta ge T( V) ut pu t V ol ta ge...
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ut pu t C ur re nt IO T( R1212D101C A) ut pu t C ur re nt IO T( A) ut pu t C ur re nt IO T( A) IOUT=10m A-100m A VOUT 10.2 Time (ms) IOUT=1m A-30m A VOUT 15.3 Time (ms) ut pu t V ol ta ge T( V) ut pu ...
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1. The products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before decid...
