Externally Applied Reference Voltage (Vref) Ceramic Capacitors Compati
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XC9106 Series
Externally Applied Reference Voltage (Vref) Ceramic Capacitors Compatible Input Voltage Range: 0.9V~10.0V Oscillation Frequency: 300kHz, 100kHz (±15%) Control (XC9106) PWM/PFM Automatic Switching Control (XC9107) SOT-25 USP-6B Package
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref) 2002 Ver.
Applications Power Supply PDAs Cellular Phones Palmtop Computers Portable Audio Systems Various Multi-function Power Supplies
General Description
XC9106 series step-up DC/DC controller with externally applied reference voltage (Vref). Output voltage will with external resistors (RFB1 Vref value. series make easy control output voltage externally suited software applications that need vary voltage, such power supply PDA. Output will stable matter which load capacitors used capacitor used, RSENSE about will required phase compensation will achieved. This makes ceramic capacitors much easier, allows lower output ripple reduced area requirements. Tantalum electrolytic capacitors also used, which case, RSENSE becomes unnecessary. Oscillation frequencies high clock, ripple 300kHz supply current 100kHz available. XC9107 series PWM/PFM automatic switching controlled. Control switches from during light loads with XC9107 series highly efficient from light loads large output currents. bringing whole circuit down while series stand-by mode (CE/PWM low), supply current reduced less than 1.0µA.
Features
Input Voltage Range: VREF Input Range: Output Voltage: Oscillation Frequency: Output Current:
0.9V 10.0V 0.8V 2.5V (±2.0%) Vref external split resistor ratio VOUT=Vref (RFB1+RFB2)/RFB2 300kHz, 100kHz ±15% more than 30mA (VIN=3.3V, VOUT=20V, when peripheral components used circuits below (XC9106) PWM/PFM auto-switching (XC9107) (TYP.) ISTB=1.0µA (MAX.) capacitors compatible SOT-25, USP-6B
Power Supply Voltage Range: 1.8V 10.0V more than Vref+0.7V
Controls: High Efficiency: Stand-by Current: Load Capacitors: Packages:
Typical Application Circuit
Electrical Characteristics
XC9107D003MR 10µH VOUT 3.3V Power 2SK2159 Vref Circuit left VDD=VIN=3.3V, OUT=30mA
RSENSE 100m Ceramic MA737 27pF VOUT 8V~25V RFB1 IOUT 30mA 270k RFB2
Ceramic 10µF
CE/Vref
XC9107D003MR VOUT
Circuit left VDD=VIN=3.3V
0.8V~2.5V converter
2.5V 2.0V 1.5V Vref=0.8V IOUT (mA) 1000
RSENSE light load (uncontinuous mode) applications such small LCD, even using ceramic capacitor.
XC9106 Series
Configuration
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Assignment
NUMBER
Vref
SOT-25 USP-6B NAME
FUNCTION Output Resistor Connection Supply Voltage Serves both Chip Enable Reference Voltage Apply pin. Ground External Transistor Connection Connection
SOT-25 (TOP VIEW)
USP-6B (TOP VIEW)
Ordering Information XC9106D12345
XC9106 Series: Control
XC9107D12345
XC9107 Series: PWM/PFM automatic switching control (Ordering information same XC9106 Series)
Reference Voltage (apply external) Fixed Oscillation Frequency: 300kHz 100kHz Package: SOT-25 reel 3000 pcs.) USP-6B reel 3000 pcs.) Standard Feed Reverse Feed
Embossed Tape:
Block Diagram
Current Ripple Detect Phase Compensation
Comparator Error Amp. Vref with Soft Start, Vref PWM/PFM Controller Ramp Wave Generator,
Buffer, Driver
CMOS INPUT CMOS OUTPUT
Absolute Maximum Ratings
PARAMETER Voltage Voltage Vref Voltage Voltage Current Power Dissipation Operating Ambient Temperature Storage Temperature SYMBOL Vref VEXT IEXT/
SOT-25
USP-6B
RATINGS -0.3 12.0 -0.3 12.0 -0.3 12.0 -0.3 ±100 +125
25OC UNITS
Topr Tstg
XC9106 Series
Electrical Characteristics
XC9106D001MR, XC9107D001MR PARAMETER Output Voltage Reference Voltage Range Control Voltage
Power Supply Voltage Range
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=100 (kHz) MIN. 8.820 0.882 Vref 0.9V shown right (Vref applied voltage 0.7V) CONDITIONS Vref 0.9V
Recommended Circuit using 2SD1628, OUT=1.0mA
Ta=25OC TYP. 9.000 0.900 MAX. 9.180 0.918 10.0 20.0 0.20 -0.1 -0.1 UNITS Circuit
Operation Start Voltage Oscillation Start Voltage
SYMBOL VOUT Vref VST1 VST2
external connections CE/Vref=0.9V, Voltage applied, FB=0V 0.65 10.0
VHLD Operation Holding Voltage Recommended Circuit using 2SD1628, IOUT=1.0mA IDD1 Same VST2, VDD=3.300V Supply Current IDD2 Same IDD1, FB=1.2V Supply Current Same IDD1, CE/Vref=0V ISTB Stand-by Current FOSC Same IDD1 Oscillation Frequency MAXDTY Same IDD1 Maximum Duty Ratio PFMDTY Load Duty Ratio (XC9106 series) EFFI Recommended Circuit using XP161A1355 Efficiency Soft-start Time Vref=0.9V Same IDD1 VCEH "High" Voltage Same IDD1 VCEL "Low" Voltage "High" Resistance REXTH Same IDD1, VEXT=VOUT-0.4V REXTL Same IDD1, VEXT=0.4V "Low" Resistance ICEH Same IDD2, CE=2.5V "High" Current Same IDD2, CE=0V ICEL "Low" Current Same IDD2, CE=VDD IFBH "High" Current Same IDD2, CE=0V IFBL "Low" Current
Test Conditions: Unless otherwise stated, ceramic, recommended should connected. 0.09 Vref RFB1, 3.30 (mA) 3.30 IOUT
Notes
Although starts step-up operations from 0.8V, output voltage oscillation frequency stabilized 1.8V (Vref applied voltage 0.7V). Therefore, more than 1.8V (Vref applied voltage 0.7V) recommended when supplied from other power sources.
XC9106 Series
Electrical Characteristics
XC9106D003MR, XC9107D003MR PARAMETER Output Voltage Reference Voltage Range Control Voltage
Power Supply Voltage Range
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=300 (kHz) MIN. 8.820 Vref 0.9V 0.882 shown right (Vref applied voltage 0.7V) Vref 0.9V
Recommended Circuit using 2SD1628, OUT=1.0mA
Ta=25OC TYP. 9.000 0.900 MAX. 9.180 0.918 10.0 20.0 0.20 -0.1 -0.1 UNITS Circuit
Operation Start Voltage Oscillation Start Voltage
SYMBOL VOUT Vref VST1 VST2
CONDITIONS
external connections CE/Vref=0.9V, Voltage applied, FB=0V 0.65 10.0
VHLD Operation Holding Voltage Recommended Circuit using 2SD1628, IOUT=1.0mA Same VST2, VDD=3.300V IDD1 Supply Current Same IDD1, FB=1.2V IDD2 Supply Current Same IDD1, CE/Vref=0V ISTB Stand-by Current Oscillation Frequency FOSC Same IDD1 Maximum Duty Ratio MAXDTY Same IDD1 Duty Ratio PFMDTY Load (XC9106 series) Efficiency EFFI Recommended Circuit using XP161A1355 Soft-start Time Vref=0.9V Same IDD1 VCEH "High" Voltage Same IDD1 VCEL "Low" Voltage "High" Resistance REXTH Same IDD1, VEXT=VOUT-0.4V REXTL Same IDD1, VEXT=0.4V "Low" Resistance Same IDD2, CE=2.5V ICEH "High" Current Same IDD2, CE=0V ICEL "Low" Current Same IDD2, CE=VDD IFBH "High" Current Same IDD2, CE=0V IFBL "Low" Current
Test Conditions: Unless otherwise stated, ceramic, recommended should connected. Vref 0.09 RFB1, 3.30 3.30 (mA) IOUT
Notes
Although starts step-up operations from 0.8V, output voltage oscillation frequency stabilized 1.8V (Vref applied voltage 0.7V). Therefore, more than 1.8V (Vref applied voltage 0.7V) recommended when supplied from other power sources.
Standard Circuit
RSENSE VOUT RFB1 RFB2 CE/Vref Power
When obtaining from source other than VOUT, please insert capacitor between order provide stabler operations. Please wire between VOUT/VDD pin. Strengthen wiring sufficiently. When using capacitor other than ceramic please take away RSENSE short.
Insert when using bipolar Transistor.
XC9106 Series
Operational Description
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
XC9106 series reference voltage (Vref) apply external step-up DC/DC Controler ICs. Output voltage will with external resistors (RFB1 Vref value. series make easy control output voltage externally suited software applications that need vary voltage such power supply PDA. <Error Amp.> Error Amplifier designed monitor output voltage, comparing feedback voltage (FB) with reference voltage Vref. response feedback voltage lower than reference voltage Vref, output voltage error amp. decreases. <OSC Generator> This circuit generates internal reference clock. <Ramp Wave Generator> Ramp Wave Generator generates saw-tooth waveform based outputs from Generator. <PWM Comparator> Comparator compares outputs from Error Amp. saw-tooth waveform. When voltage from Error Amp's output low, external switch will <PWM/PFM Controler> This circuit generates pulses. PWM/PFM automatic switching mode switches between automatically depending load. circuit generates pulses based outputs from Comparator, shifting between modes occurs smoothly. Noise easily reduced with control since switching frequency fixed. Because function, control suited application easily selected. <Vref with Soft Start> reference voltage XC9106/9107 series adjusted fixed external applied voltage. (For output voltage settings, please refer output voltage setting page protect against inrush current, when power switched also protect against voltage overshoot, soft-start time internally 10ms. should noted, however, that this circuit does protect load capacitor (CL) from inrush current. With Vref voltage limited, depending upon input error amp, operation maintains balance between inputs error amps controls pin's time that doesn't increase more than necessary. XC9106/9107 series alters soft start times setting value reference voltage order protect against voltage overshoot also protect against inrush current. Please determine soft start time formula equation. 8.65 Vref 2.21
XC9106 XC9107D
Soft Start Time (ms)
[Example Computation] Vref 0.9V, 8.65 2.21 10.0
Reference Voltage Vref <Enable Function> This function controls operation shutdown When voltage drops 0.2V less, disable mode will entered, IC's operations will stop will kept level (the external N-type MOSFET will OFF) When state chip disable, current consumption will more than 1.0µA. When pin's voltage rises 0.65V more, enable mode will entered operations will recommence. also doubles with reference voltage XC9106/9107 series, range reference voltage varied externally from 0.8V 2.5V.
XC9106 Series
Functional Settings
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Output Voltage Setting> Output voltage adding external split resistors. Output voltage determined following equation, based values RFB1 RFB2. RFB1 RFB2 should normally less. range reference voltage series varied externally from 0.8V 2.5V. VOUT Vref applied voltage (RFB1 RFB2) RFB2 value CFB1, speed-up capacitor phase compensation, should result fzfb 1/(2 RFB1) equal 30kHz. Adjustments required depending application, value inductance (L), value load capacity (CL). fzfb 30kHz (L=10µH) fzfb 20kHz (L=22µH) fzfb 10kHz (L=47µH) RFB1 270k 20pF 27pF 56pF RFB2 (fzfb 30kHz, 10µH) (fzfb 20kHz, 22µH) (fzfb 10kHz, L=47µH)
ceramic capacitor circuit XC9106/9107 series organized specialized circuit which reenacts negative feedback both voltage current. Also insertion approximately 100m inexpensive sense resistor current sense, high degree stability possible even using ceramic capacitor, condition which used difficult achieve. Compared tantalum condenser, because series operated very small capacity, suited ceramic capacitor which cheap small.
Recommended Components
*When MOSFET used 2SK2159 (NEC N-Channel Power MOSFET) Note* With direct voltages over 4.5V, XP161A11A1PR. *When used 2SD1628 (Sanyo) (adjust with Tr's load) 2200pF (ceramic type) FOSC 0.7)
MA2Q737 (Schottky Diode type, MATSUSHITA) Adjust below according condition peripheral components When Ceramic capacitor used 22µH (SUMIDA CDRH5D28, FOSC 100kHz) 10µH (SUMIDA CDRH5D18, FOSC 300kHz) 10µF (Ceramic capacitor, LMK325BJ106ML, TAIYOYUDEN) formula below when step-up ratio output current large. standard value) (IOUT(mA) 300mA VOUT VIN) RSENSE 100m (FOSC 300kHz) Look "Low Chip Resistor" selection (FOSC 100kHz) When Tantalum condenser used 22µH (SUMIDA CDRH5D28, FOSC 300kHz) 47µH (SUMIDA CDRH5D28, FOSC 100kHz) Except when IOUT(mA) 100mA VOUT 22µH 47µF (tantalum type NIPPONCHEMI 16MCE476MD2) formula below when step-up ratio output current large. standard value) (IOUT(mA) 300mA VOUT VIN) RSENSE: required, short wire. When Electrolytic condenser used 22µH (SUMIDA CDRH5D28, FOSC 300kHz) 47µH (SUMIDA CDRH5D28, FOSC 100kHz) Except when IOUT(mA) 100mA VOUT 22µH 100µF electrolytic type) 2.2µF (ceramic type) Strengthen appropriately when step-up ratio output current large. RSENSE: required, short wire. CFB: that fzfb 100kHz.
XC9106 Series
Test Circuits
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Circuit
RFB2 RFB1 RSENSE VOUT
Circuit
Circuit
Circuit
RFB2
RSENSE
RFB1
Circuit
RFB2 RFB1 RSENSE
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