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 Packages 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.
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
June 2003 Ver.
APPLICATIONS
Power Supply PDAs Cellular Phones Palmtop Computers Portable Audio Systems Various Multi-function Power Supplies
FEATURES
Input Voltage Range: Power Supply Voltage Range: VREF Input Range: Output Voltage: Oscillation Frequency: Output Current: 0.9V 10.0V 1.8V 10.0V more than Vref+0.7V 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
Controls: High Efficiency: Stand-by Current: Load Capacitors: Packages:
(XC9106) PWM/PFM auto-switching (XC9107) (TYP.) ISTB=1.0µA (MAX.) capacitors compatible SOT-25, USP-6B
TYPICAL APPLICATION CIRCUIT
TYPICAL APPLICATION PERFORMANCE
XC9107D003MR 10µH VOUT 3.3V Vref Circuit left VDD=VIN=3.3V, IOUT=30mA
RSENSE 100m Ceramic MA737 27pF VOUT 8V~25V RFB1 IOUT 30mA 270k RFB2
Ceramic 10µF
CE/Vref
Power 2SK2159
XC9107D003MR
Circuit left VDD=VIN=3.3V
VOUT
0.8V~2.5V converter
2.5V IOUT (mA) 1000
Semiconductor Ltd.
2.0V 1.5V Vref=0.8V
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 SOT-25 USP-6B NAME Vref 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: Package: 300kHz 100kHz SOT-25 reel 3000 pcs.) USP-6B reel 3000 pcs.) Embossed Tape: Standard Feed Reverse Feed
PACKAGING INFORMATION
SOT-25 (SOT-23-5) USP-6B
0.15 (0.45) 0.5+0.1 (0.05)
0.45)
1.8+0.15
(0.45) (0.45)
(0.125)
0.005+0.002
(0.27)
(0.27)
(0.27)
(0.65)+0.15 -0.05
0.7+0.03
5-0.2+0.05
00.1+0.03
0.2+0.05
1.0+0.1 0.25+0.1
0.25+0.1
0.5+0.1 0.5+0.1
1.6+0.15
Semiconductor Ltd.
(0.05) -0.005
+0.01
XC9106 Series
BLOCK DIAGRAM
Current Ripple Detect Phase Compensation
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Comparator Error Amp. Vref with Soft Start, Vref PWM/PFM Controller Ramp Wave Generator,
Buffer, Driver
CMOS INPUT CMOS OUTPUT
ABSOLUTE MAXIMUM RATINGS 25OC
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
UNITS
Topr Tstg
Semiconductor Ltd.
XC9106 Series
ELECTRICAL CHARACTERISTICS
XC9106D001MR, XC9107D001MR PARAMETER Output Voltage Reference Voltage Range Control Voltage SYMBOL VOUT Vref Vref 0.9V Vref 0.9V Vref 2.5V Power Supply Voltage Range Operation Start Voltage Oscillation Start Voltage Operation Holding Voltage Supply Current Supply Current Stand-by Current Oscillation Frequency Maximum Duty Ratio Duty Ratio Efficiency Soft-start Time "High" Voltage "Low" Voltage "High" Resistance "Low" Resistance "High" Current "Low" Current "High" Current "Low" Current 3.30 3.30 VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL Vref 0.9V CONDITIONS
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=100 (kHz) MIN. 8.820 0.784 0.882 2.450 0.800 0.900 2.500 TYP. 9.000 MAX. 9.180 0.816 0.918 2.550 10.0 (XC9106 series) 0.65 0.20 -1.0 -0.1 -0.1 RFB1, 10.0 20.0
Ta=25OC UNITS CIRCUIT
shown right (Vref applied voltage+0.7V) Recommended Circuit using 2SD1628, IOUT=1.0mA external connections CE/Vref=0.9V, Voltage applied, FB=0V Recommended Circuit using 2SD1628, IOUT=1.0mA Same VST2, VDD=3.300V Same IDD1, FB=1.2V Same IDD1, CE/Vref=0V Same IDD1 Same IDD1 Load Vref=0.9V Same IDD1 Same IDD1 Same IDD1, VEXT=VOUT-0.4V Same IDD1, VEXT=0.4V Same IDD2, CE=0.8V Same IDD2, CE=2.5V Same IDD2, CE=0V Same IDD2, FB=VDD Same IDD2, FB=1.0V 0.09 (mA) Recommended Circuit using XP161A1355
Test Conditions: Unless otherwise stated, ceramic, recommended should connected. Vref 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.
Semiconductor Ltd.
XC9106 Series
ELECTRICAL CHARACTERISTICS
XC9106D003MR, XC9107D003MR PARAMETER Output Voltage Reference Voltage Range Control Voltage SYMBOL VOUT Vref Vref 0.8V Vref 0.9V Vref 2.5V Power Supply Voltage Range Operation Start Voltage Oscillation Start Voltage Operation Holding Voltage Supply Current Supply Current Stand-by Current Oscillation Frequency Maximum Duty Ratio Duty Ratio Efficiency Soft-start Time "High" Voltage "Low" Voltage "High" Resistance "Low" Resistance "High" Current "Low" Current "High" Current "Low" Current 3.30 3.30 VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL Vref 0.9V CONDITIONS
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=300 (kHz) MIN. 8.820 0.784 0.882 2.450 0.800 0.900 2.500 TYP. 9.000 MAX. 9.180 0.816 0.918 2.500 10.0 (XC9106 series) 0.65 0.20 -1.0 -0.1 -0.1 RFB1, 10.0 20.0
Ta=25OC UNITS CIRCUIT
shown right (Vref applied voltage 0.7V) Recommended Circuit using 2SD1628, IOUT=1.0mA external connections CE/Vref=0.9V, Voltage applied, FB=0V Recommended Circuit using 2SD1628, IOUT=1.0mA Same VST2, VDD=3.300V Same IDD1, FB=1.2V Same IDD1, CE/Vref=0V Same IDD1 Same IDD1 Load Vref=0.9V Same IDD1 Same IDD1 Same IDD1, VEXT=VOUT-0.4V Same IDD1, VEXT=0.4V Same IDD2, CE=0.8V Same IDD2, CE=2.5V Same IDD2, CE=0V Same IDD2, FB=VDD Same IDD2, FB=1.0V 0.09 (mA) Recommended Circuit using XP161A1355
Test Conditions: Unless otherwise stated, ceramic, recommended should connected. Vref 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.
TYPICAL APPLICATION 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.
Semiconductor Ltd.
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. PWM/PFM control turns into control when threshold voltage becomes lower than voltage error amps. Noise easily reduced with control since switching frequency fixed. Because function, control suited application easily selected. series suitable noise sensitive portable audio equipment control suppress noise during operation PWM/PFM switching control reduce consumption current during light loads stand-by.
<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 [Example Computation]
XC9106 XC9107D
Soft Start Time (ms)
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.
Semiconductor Ltd. Semiconductor Ltd.
XC9106 Series
FUNCTIONAL SETTINGS Output Voltage Setting>
Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
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, 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) (FOSC 100kHz)
When Tantalum capacitor 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 capacitor used 22µH (SUMIDA CDRH5D28, FOSC 300kHz) 47µH (SUMIDA CDRH5D28, FOSC 100kHz) Except when IOUT(mA) 100mA VOUT 22µH RSENSE: CFB: 100µF electrolytic type) 2.2µF (ceramic type) Strengthen appropriately when step-up ratio output current large. required, short wire. that fzfb 100kHz.
Semiconductor Ltd.
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
RSENSE
RFB1
RFB2
Circuit
RFB2 RSENSE
RFB1
Semiconductor Ltd.
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