R1210N221D-TL

PWM Step-up DC/DC Converter R1210N××1× Series APPLICATION MANUAL NO. EA-075-0012 PWM Step-up DC/DC Converter R1210N××1× Series OUTLINE The R1210N××1× Series are PWM step-up DC/DC Converter, with high accuracy, low supply current by CMOS process. Each of the R1210N××1× Series consists of an oscillator, a PWM circuit, a reference voltage unit, an error amplifier, phase compensation circuit, resistors for voltage detection, a chip enable circuit. Further, includes a controller against drastic load transient, a control transistor with low ON-Resistance, ‘LX switch’, and a protection circuit for LX switch and an output voltage detector. R1210N××1A Series contain further a circuit for changeover oscillator frequency each. A low ripple, high efficiency step-up DC/DC converter can be composed of this IC with only three external components, or an inductor, a diode and a capacitor. The R1210N Series can detect drastic change of output voltage with a circuit controller. The load transient response is improved compared with current model, furthermore the R1210N××1A Series have another function, that is, when the load current is small, oscillator frequency is decreased by a circuit for switching oscillator frequency from TYP 100kHz to 35kHz, therefore, supply current is reduced. . The built-in chip enable circuit can make the standby mode with ultra low quiescent current. Since the package for these ICs is small SOT-23-5, high density mounting of the ICs on board is possible. FEATURES • External Components ................................................................. Only an inductor, a diode, and a capacitor • Standby Current ......................................................................... TYP 0µA . • Low Temperature-Drift Coefficient of Output Voltage.............. TYP ±100ppm/°C . • Output Voltage............................................................................. Stepwise Setting with a step of 0.1V in the range of 2.2V to 6.0V (××1C/D) 2.2V to 3.5V (××1A) • Two choices of Basic Oscillator Frequency................................ 100kHz (××1A/C), 180kHz (××1D) • Small Package .............................................................................. SOT-23-5 (Mini-mold) • High Efficiency ............................................................................ TYP 88% . (VIN=Set Output Voltage×0.6 [V], IOUT=10mA) • Low Ripple, Low Noise • Built-in a driver transistor with low on-resistance • Start-up Voltage........................................................................... MAX. 0.9V • Basic Frequency change-over circuit (only for ××1A type)....... from TYP. 100kHz to 35kHz 1 R1210N××1× APPLICATIONS • Power source for battery-powered equipment. • Power source for portable communication appliances, cameras, VCRs • Power source for appliances of which require higher voltage than battery voltage. BLOCK DIAGRAM Vref Circuit LX 5 VLX limiter Buffer PWM Controller OSC fosc Control Phase Comp. 2 VOUT 4 GND Chip Enable 1 CE SELECTION GUIDE In the R1210N Series, the output voltage, the oscillator frequency, the optional function, and the taping type for the ICs can be selected at the user’s request. The selection can be made by designating the part number as shown below ; R1210N××1×-×× ↑ ↑↑ a bc Code Setting Output Voltage (VOUT) : a Stepwise setting with a step of 0.1V in the range of 2.2V to 6.0V (for ××1C/D version) or 2.2V to 3.5V (for ××1A version) is possible. Designation of Oscillator Frequency b A : 100kHz with a Frequency Change-over circuit C : 100kHz without a Frequency Change-over circuit D : 180kHz without a Frequency Change-over circuit c Designation of Taping Type; Ex. :TR, TL (refer to Taping Specification) “TR” is prescribed as a standard. Contents 2 R1210N××1× PIN CONFIGURATION SOT-23-5 5 4 LX CE GND (mark side) VOUT NC 1 2 3 PIN DESCRIPTION Pin No. 1 2 3 4 5 CE VOUT NC GND LX Symbol Description Chip Enable Pin Pin for Monitoring Output Voltage No Connection Ground Pin Switching Pin (Nch Open Drain) ABSOLUTE MAXIMUM RATINGS Symbol VOUT VLX VCE ILX PD Topt Tstg Item VOUT Pin Output Voltage LX Pin Output Voltage CE Pin Input Voltage LX Pin Output Current Power Dissipation Operating Temperature Range Storage Temperature Range Rating 9.0 9.0 9.0 400 250 -40∼+85 -55∼+125 Unit V V V mA mW °C °C 3 R1210N××1× ELECTRICAL CHARACTERISTICS • R1210N××1× Symbol VOUT VIN ∆VOUT/ ∆Topt Vstart ∆Vstart/ ∆Topt Vhold Item Output Voltage Maximum Input Voltage Step-up Output Voltage Temperature Coefficient Start-up Voltage Start-up Voltage Temperature Coefficient -40°C≤ Topt ≤ 85°C VIN=0V→2V VOUT:1.8kΩ pull-down -40°C≤ Topt ≤ 85°C 0.7 0.9 30 50 35 60 40 70 45 80 50 90 55 80 60 90 70 100 80 110 90 120 -3.2 ±100 0.9 Conditions VIN=VSET×0.6, IOUT=1mA MIN. ×0.975 TYP. MAX. ×1.025 8 (Topt=25°C) Unit V V ppm/°C V mV/°C V (××1A/C) V (××1D) µA (××1A/C) µA (××1D) µA (××1A/C) µA (××1D) µA (××1A/C) µA (××1D) µA (××1C) µA (××1D) µA (××1C) µA (××1D) Hold-on Voltage VIN=2V→0V IOUT=1mA , 2.2V≤VSET≤2.5V VOUT=VSET×0.96 2.6V≤VSET≤3.0V VOUT=VSET×0.96 IDD1 Supply Current1 3.1V≤VSET≤3.5V VOUT=VSET×0.96 3.6V≤VSET≤4.0V VOUT=VSET×0.96 4.1V≤VSET≤4.5V VOUT=VSET×0.96 4 R1210N××1× Symbol Item Conditions MIN. TYP. 70 100 80 110 90 130 10 MAX. 100 130 110 150 120 170 17 24 0.5 0.5 Unit µA (××1C) µA (××1D) µA (××1C) µA (××1D) µA (××1C) µA (××1D) µA (××1A/C) µA (××1D) µA µA KHz (××1A/C) KHz (××1D) kHz/°C (××1A/C) kHz/°C (××1D) 4.6V≤VSET≤5.0V VOUT=VSET×0.96 IDD1 Supply Current1 5.1V≤VSET≤5.5V VOUT=VSET×0.96 5.6V≤VSET≤6.0V VOUT=VSET×0.96 IDD2 Supply Current2 VOUT=VCE=VSET+0.5V 15 Istandby ILXleak Standby Current LX Leakage Current VOUT=6V VCE=0V , VOUT=VLX=8V 80 VOUT=VCE=VSET×0.96 144 180 0.5 -40°C≤ Topt ≤ 85°C 0.6 VOUT=VCE=VSET×0.96, (VLX “L” Side) VOUT=VCE=VSET×0.96, (VLX “L” Side) VOUT=VSET×0.96 VOUT=VSET×0.96 VOUT=VCE=6.5V VIN=6.5V VCE=0V , -0.1 -0.1 0 0 70 0.4 0.9 85 0.6 100 fosc Maximum Oscillator Frequency 120 216 ∆fosc/ ∆Topt Oscillator Frequency Temperature Coefficient Maxdty VLXlim VCEH VCEL ICEH ICEL Oscillator Maximum Duty Cycle VLX Limit Voltage CE “H” Input Voltage CE “L Input Voltage ” CE “H” Input Current CE “L Input Current ” 97 0.8 % V V 0.3 0.1 0.1 V µA µA 5 R1210N××1× Symbol Item Conditions 2.2V≤VSET≤2.4V VLX=0.4V 2.5V≤VSET≤2.9V VLX=0.4V 3.0V≤VSET≤3.4V VLX=0.4V 3.5V≤VSET≤3.9V VLX=0.4V 4.0V≤VSET≤4.4V VLX=0.4V 4.5V≤VSET≤4.9V VLX=0.4V 5.0V≤VSET≤5.4V VLX=0.4V 5.5V≤VSET≤6.0V VLX=0.4V VIN=VSET×0.6, IOUT=0.5mA (only for ××1A) MIN. 70 85 100 120 140 150 170 190 10 TYP. MAX. Unit mA mA mA mA mA mA mA mA ILX LX Switching Current fosc2 Change-over frequency 35 70 KHz *Note: VSET means setting Output Voltage. 6 R1210N××1× TEST CIRCUITS A L LX VIN GND CE OSCILLOSCOPE SD E LX VOUT CL GND CE VOUT CL V B LX VOUT A F LX VOUT CL GND CE GND CE OSCILLOSCOPE C LX VOUT A G LX VOUT GND CE GND CE OSCILLOSCOPE D A LX VOUT H LX VOUT GND CE GND CE A L: 100µH CD54 (Sumida Electric Co, LTD) SD: MA721 (Matsushita Electronics Corporation, Schottky Type) CL: 22µF×2 (Tantalum Type) 7 R1210N××1× TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current R1210N301C 3.2 VIN:0.9V 3.2 VIN:0.9V R1210N301D Output Voltage VOUT (V) Output Voltage VOUT (V) 3.1 VIN:1.5V VIN:2.0V VIN:2.5V 3.1 VIN:1.5V VIN:2.0V VIN:2.5V 3.0 3.0 2.9 2.9 2.8 0 50 100 150 200 250 Output Current IOUT (mA) 300 2.8 0 50 100 150 200 250 Output Current IOUT (mA) 300 R1210N501C 5.4 VIN:3.0V VIN:2.0V VIN:4.0V R1210N501D 5.4 Output Voltage VOUT (V) Output Voltage VOUT (V) 5.2 5.2 VIN:3.0V VIN:4.0V 5.0 5.0 4.8 VIN:1.5V 4.6 4.4 0 50 100 150 200 250 Output Current IOUT (mA) 300 4.8 VIN:2.0V 4.6 VIN:1.5V 4.4 0 50 100 150 200 250 Output Current IOUT (mA) 300 2) Efficiency vs. Output Current R1210N301C 100 100 R1210N301D 80 VIN:2.5V efficiency (%) 80 VIN:2.5V efficiency (%) 60 VIN:1.5V 40 VIN:0.9V 20 0 0 50 VIN:2.0V 60 VIN:1.5V 40 VIN:0.9V 20 0 VIN:2.0V 100 150 200 250 Output Current IOUT (mA) 300 0 50 100 150 200 250 Output Current IOUT (mA) 300 8 R1210N××1× R1210N501C 100 100 R1210N501D 80 VIN:4.0V 80 VIN:4.0V efficiency (%) 60 VIN:1.5V efficiency (%) VIN:3.0V VIN:2.0V VIN:3.0V 60 VIN:2.0V VIN:1.5V 40 40 20 0 0 50 100 150 200 250 Output Current IOUT (mA) 300 20 0 0 50 100 150 200 250 Output Current IOUT (mA) 300 3) R1210N××1A/C Efficiency R1210N301× VIN:1.5V 100 90 80 70 efficiency (%) 60 50 40 30 20 10 0 0.01 0.10 1.00 10.00 Output Current IOUT(mA) 100.00 R1210N301A R1210N301C 4) Ripple Voltage vs. Output Current R1210N301C ESR:0.33 Ω 140 R1210N301D ESR:0.33 Ω 140 Ripple Voltage Vripple (mV) 100 VIN:1.5(V) 80 60 40 20 0 0 50 100 Output Current IOUT (mA) 150 VIN:0.9(V) VIN:2.0(V) Ripple Voltage Vripple (mV) 120 120 100 80 60 40 20 0 0 50 100 Output Current IOUT (mA) 150 VIN:0.9(V) VIN:1.5(V) VIN:2.0(V) 9 R1210N××1× R1210N501C ESR:0.33 Ω 140 VIN:1.5(V) 140 R1210N501D ESR:0.33 Ω Ripple Voltage Vripple (mV) Ripple Voltage Vripple (mV) 120 100 80 60 VIN:0.9(V) 40 20 0 0 50 100 150 200 250 Output Current IOUT (mA) 300 VIN:2.0(V) 120 VIN:1.5(V) 100 80 VIN:0.9(V) 60 40 20 0 0 50 100 150 200 250 Output Current IOUT (mA) 300 VIN:2.0(V) 5) Start-up Voltage/Hold-on Voltage vs. Output Current (Topt=25°C) R1210N301C Start-up/Hold-on Voltage Vstart/Vhold (V) Start-up/Hold-on Voltage Vstart/Vhold (V) 2.0 R1210N301D 2.0 1.6 Vstart 1.6 Vstart 1.2 1.2 0.8 Vhold 0.4 0.0 0 5 10 15 20 25 Output Current IOUT (mA) 30 0.8 Vhold 0.4 0.0 0 5 10 15 20 25 Output Current IOUT (mA) 30 R1210N501C Start-up/Hold-on Voltage Vstart/Vhold (V) Start-up/Hold-on Voltage Vstart/Vhold (V) 2.0 R1210N501D 2.0 1.6 Vstart 1.6 Vstart 1.2 Vhold 0.8 1.2 Vhold 0.8 0.4 0.0 0 5 10 15 20 25 Output Current IOUT (mA) 30 0.4 0.0 0 5 10 15 20 25 Output Current IOUT (mA) 30 10 R1210N××1× 6) Output Voltage vs. Temperature R1210N301C 3.10 3.10 R1210N301D Output Voltage VOUT (V) 3.05 IOUT:10(mA) IOUT:30(mA) 3.00 IOUT:0(mA) 2.95 Output Voltage VOUT (V) 3.05 IOUT:30(mA) 3.00 IOUT:10(mA) IOUT:0(mA) 2.95 2.90 -50 -25 0 25 50 Temperature Topt (°C) 75 100 2.90 -50 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N501C 5.15 5.10 5.15 5.10 R1210N501D Output Voltage VOUT (V) 5.05 5.00 4.95 4.90 4.85 -50 Output Voltage VOUT (V) IOUT:10(mA) IOUT:30(mA) IOUT:0(mA) 5.05 5.00 4.95 4.90 4.85 -50 IOUT:10(mA) IOUT:30(mA) IOUT:0(mA) -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 7) Supply Current 1 vs. Temperature R1210N301A 100 100 R1210N301D Supply Current ISS1 (µA) Supply Current ISS1 (µA) 80 80 60 60 40 40 20 0 -50 20 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 11 R1210N××1× R1210N501C 120 100 Supply Current ISS1 (µA) R1210N501D 120 100 85 60 40 20 0 -50 Supply Current ISS1 (µA) 85 60 40 20 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 8) Supply Current2 vs. Temperature R1210N301A 25 25 R1210N221D Supply Current ISS2 (µA) 15 Supply Current ISS2 (µA) 20 20 15 10 10 5 0 -50 5 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N501C 25 25 R1210N601D Supply Current ISS2 (µA) Supply Current ISS2 (µA) 20 20 15 15 10 10 5 0 -50 5 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 12 R1210N××1× 9) Standby Current vs. Temperature R1210N221A 1.0 1.0 Standby Current Istandby (µA) R1210N221D 0.8 0.6 0.4 0.2 0.0 -0.2 -50 Standby Current Istandby (µA) 0.8 0.6 0.4 0.2 0.0 -0.2 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N601C 1.0 1.0 Standby Current Istandby (µA) R1210N601D 0.8 0.6 0.4 0.2 0.0 -0.2 -50 Standby Current Istandby (µA) 0.8 0.6 0.4 0.2 0.0 -0.2 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 10) Oscillator Frequency vs. Temperature R1210N221A 300 300 R1210N221D Oscillator Frequency fosc (kHz) 250 200 150 100 50 0 -50 Oscillator Frequency fosc (kHz) 250 200 150 100 50 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 13 R1210N××1× R1210N601C 300 Oscillator Frequency fosc (kHz) 300 R1210N601D Oscillator Frequency fosc (kHz) 250 200 150 100 50 0 -50 250 200 150 100 50 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 11) Maximum Duty Cycle vs. Temperature R1210N221A 100 90 80 70 60 50 40 -50 100 90 80 70 60 50 40 -50 R1210N221D Maximum Duty Cycle (%) Maximum Duty Cycle (%) -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N601C 100 90 100 90 R1210N601D Maximum Duty (%) Maximum Duty (%) 80 70 60 50 40 -50 80 70 60 50 40 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 14 R1210N××1× 12) LX Switching Current vs. Temperature R1210N301A 500 500 LX Switching Current I_LXswitch (mA) R1210N501C LX Switching Current I_LXswitch (mA) 400 400 300 300 200 200 100 0 -50 100 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N221D 500 500 LX Switching Current I_LXswitch (mA) R1210N601D LX Switching Current I_LXswitch (mA) 400 400 300 300 200 200 100 0 -50 100 0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 13) LX leakage Current vs. Temperature R1210N221A 1.0 1.0 R1210N221D LX Leakage Current ILX_leak (µA) 0.8 0.6 0.4 0.2 0.0 -0.2 -50 LX Leakage Current ILX_leak (µA) 0.8 0.6 0.4 0.2 0.0 -0.2 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 15 R1210N××1× R1210N601C 1.0 1.0 LX Leakage Current ILX_leak (µA) R1210N601D 0.8 0.6 0.4 0.2 0.0 -0.2 -50 LX Leakage Current ILX_leak (µA) 0.8 0.6 0.4 0.2 0.0 -0.2 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 14) VLX Voltage Limit vs. Temperature R1210N301A 1.0 1.0 R1210N221D LX Voltage Limit VLXlim (V) 0.6 LX Voltage Limit VLXlim (V) 0.8 0.8 0.6 0.4 0.4 0.2 0.0 -50 0.2 0.0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 R1210N501C 1.0 1.0 R1210N601D LX Voltage Limit VLXlim (V) 0.6 LX Voltage Limit VLXlim (V) -25 0 25 50 Temperature Topt (°C) 75 100 0.8 0.8 0.6 0.4 0.4 0.2 0.0 -50 0.2 0.0 -50 -25 0 25 50 Temperature Topt (°C) 75 100 16 R1210N××1× 15) CE “H” Input Voltage vs. Temperature R1210N221A 0.9 R1210N601C 0.9 CE"H" Input Voltage V_CE"H" (V) CE"H" Input Voltage V_CE"H" (V) 0.8 0.7 0.6 0.5 0.4 0.3 -50 0.8 0.7 0.6 0.5 0.4 0.3 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 16) CE “L” Input Voltage vs. Temperature R1210N221A 0.9 CE"L" Input Voltage V_CE"L" (V) R1210N601C 0.9 CE"L" Input Voltage V_CE"L" (V) 0.8 0.7 0.6 0.5 0.4 0.3 -50 0.8 0.7 0.6 0.5 0.4 0.3 -50 -25 0 25 50 Temperature Topt (°C) 75 100 -25 0 25 50 Temperature Topt (°C) 75 100 17