Control,PWM/PFM Switching Control, Step-Up DC/DC Converters, Externall

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Control,PWM/PFM Switching Control, Step-Up DC/DC Converters, Externall

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XC9106/XC9107 Series
Control,PWM/PFM Switching Control, Step-Up DC/DC Converters, Externally Applied Vref
ETR0405_002
GO-Compatible
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 pin: low), supply current reduced less than 1.0A.
APPLICATIONS
Power supply LCDs PDAs Cellular phones Palmtop computers Portable audio systems Various multi-function power supplies
FEATURES
Input Voltage 0.9V Power Supply Voltage Range 1.8V~10.0V more than Vref+0.7V VREF Input Range 0.8V~2.5V (±2.0%) Output Voltage Vref external split resistor ratio VOUT=Vref (RFB1+RFB2)/RFB2 Oscillation Frequency 300kHz, 100kHz (±15%) Output Current More than 30mA (VIN=3.3V, VOUT=20V, when external components used circuits below.) Controls (XC9106) PWM/PFM auto-switching (XC9107) High Efficiency (TYP.) Stand-by Current ISTB 1.0A (MAX.) Load Capacitors capacitors compatible Externally Applied Reference Voltage (Vref) Packages SOT-25, USP-6B
TYPICAL APPLICATION CIRCUIT
RSENSE 100m Ceramic MA737 27pF 8V~25V IOUT 30mA RFB1 270k RFB2 Ceramic CE/Vref 0.8V~2.5V converter 2SK2159 3.3V
TYPICAL PERFORMANCE CHARACTERISTICS
XC9107D003MR Vref Circuit =3.3V, IOUT=30mA
XC9107D003MR
Circuit left =3.3V 2.5V 2.0V 1.5V Vref=0.8V
RSENSE light load (uncontinuous mode) applications such small LCD, even using ceramic capacitor.
IOUT (mA)
1000
1/11
XC9106/XC9107 Series
CONFIGURATION
CE/VIEW
*The dissipation USP-6B package should solder-plated recommended mount pattern metal masking enhance mounting strength heat release. needs connected other pins. should connected pin.
CE/Vref
SOT-25 (TOP VIEW)
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
PRODUCT CLASSIFICATION
Ordering Information
XC9106D control XC9107D PWM/PFM automatic switching control DESIGNATOR DESCRIPTION Reference Voltage (Apply External) Oscillation Frequency Packaging Types Device Orientation SYMBOL Fixed 300kHz 100kHz SOT-25 USP-6B Embossed tape, standard feed Embossed tape, reverse feed DESCRIPTION
Output voltage 0.9V 4.0V (100mV steps), 1.85V 2.85V standard products. Output voltages other than these available semi-custom products.
2/11
XC9106/XC9107
Series
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 SOT-25 Power Dissipation USP-6B Operating Temperature Range Storage Temperature Range SYMBOL Vref VEXT IEXT/ Topr Tstg RATINGS -0.312.0 -0.312.0 -0.312.0 -0.3VDD+0.3 ±100 -40+85 -55+125
UNITS
3/11
XC9106/XC9107 Series
ELECTRICAL CHARACTERISTICS
XC9106D001MR, XC9107D001MR PARAMETER Output Voltage Reference Voltage Range Control Voltage Supply Voltage Range (*1) Operation Start Voltage Oscillation Start Voltage (*1) Operation Hold 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 SYMBOL VOUT Vref Vref 0.8V Vref 0.9V Vref 2.5V 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 (XC9106 series) Recommended circuit using XP161A1355 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 (FOSC=100kHz) MIN. 8.820 0.784 0.882 2.450 0.65 -1.0 TYP. 9.000 0.800 0.900 2.500 10.0 MAX. 9.180 0.816 0.918 2.550 10.0 20.0 0.20 -0.1 -0.1 Ta=25
UNITS CIRCUIT
CONDITIONS Vref 0.9V
VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL
Test Conditions: Unless otherwise stated, Ceramic, recommended MOSFET should connected. Vref= 0.09V, VDD= 3.3V VIN= 3.3V IOUT= 50mA NOTE: Although starts step-up operations from 0.8V, output voltage oscillation frequency stabilized 1.8V (Vref applied voltage0.7V). Therefore, more than 1.8V (Vref applied voltage0.7V) recommended when supplied from other power sources.
4/11
XC9106/XC9107
Series
ELECTRICAL CHARACTERISTICS (Continued)
XC9106D003MR, XC9107D003MR PARAMETER Output Voltage Reference Voltage Range Control Voltage Supply Voltage Range (*1) Operation Start Voltage Oscillation Start Voltage (*1) Operation Hold 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 SYMBOL VOUT Vref VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL Vref 0.8V Vref 0.9V Vref 2.5V shown right (Vref applied voltage0.7V) 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=3.3V Same IDD1, FB=1.2V Same IDD1, CE/Vref=0V Same IDD1 Same IDD1 Load (XC9106 series) Recommended circuit using XP161A1355 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 (FOSC=300kHz) CONDITIONS Vref 0.9V MIN. 8.820 0.784 0.882 2.450 0.65 -1.0 TYP. 9.000 0.800 0.900 2.500 10.0 MAX. 9.180 0.816 0.918 2.500 10.0 20.0 0.20 -0.1 -0.1 Ta=25
UNITS CIRCUIT
Test Conditions: Unless otherwise stated, Ceramic, recommended MOSFET should connected. VDD= 3.3V Vref= 0.09V, RFB1,2 3.3V IOUT= 50mA VIN= NOTE Although starts step-up operations from 0.8V, output voltage oscillation frequency stabilized 1.8V (Vref applied voltage0.7V). Therefore, more than 1.8V (Vref applied voltage0.7V) recommended when supplied from other power sources.
TYPICAL APPLICATION CIRCUIT
NchPower MOSFET
When obtaining from source other than VOUT, please insert capacitor between order provide stable 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.
5/11
XC9106/XC9107 Series
OPERATIONAL EXPLANATION
XC9106 series reference voltage (Vref) apply external step-up DC/DC controller ICs. Output voltage will with external resistors (RFB1 RFB2) 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 Controller> 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.) 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. 2.21
XC9106 XC9107D
Soft Start Time (ms)
[Example Computation] Vref 0.9V, 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-ch MOSFET will OFF). When state chip disable, current consumption will more than 1.0A. 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.
6/11
XC9106/XC9107
Series
OPERATIONAL EXPLANATION (Continued)
<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 RFB2) RFB2 value CFB1, speed-up capacitor phase compensation, should result fzfb equal 30kHz. Adjustments required depending application, value inductance (L), value load capacity (CL). fzfb 30kHz (L=10H) fzfb 20kHz (L=22H) fzfb 10kHz (L=47H) RFB1 270k 20pF 27pF 56pF RFB2 (fzfb 30kHz, 10H) (fzfb 20kHz, 22H) (fzfb 10kHz, 47H)
<The 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 EXTERNAL COMPONENTS
*When MOSFET used: 2SK2159 (N-ch Power MOSFET, NEC) Note* With direct voltages over 4.5V, XP161A11A1PR. *When used 2SD1628 (SANYO) (adjust with Tr's load) 2200pF (ceramic type)
MA2Q737 (Schottky Diode type, MATSUSHITA) Adjust below according condition peripheral components When Ceramic capacitor used: (CDRH5D28, SUMIDA, FOSC 100kHz) (CDRH5D28, SUMIDA, FOSC 300kHz) 10V, (Ceramic capacitor, LMK325BJ106ML, TAIYOYUDEN) formula below when step-up ratio output current large. standard VIN) 100m (FOSC 300kHz) RSENSE (FOSC 100kHz) When Tantalum capacitor used: (CDRH5D28, SUMIDA, FOSC 300kHz) (CDRH5D28, SUMIDA, FOSC 100kHz) Except when IOUT(mA) VIN2 16V, (Tantalum type 16MCE476MD2, NIPPONCHEMI) formula below when step-up ratio output current large. standard VIN) required, short wire. RSENSE: When Electrolytic capacitor used: (CDRH5D28, SUMIDA, FOSC 300kHz) (CDRH5D28, SUMIDA, FOSC 100kHz) Except when IOUT(mA) VIN2 16V, 100F electrolytic type)10V, 2.2F (ceramic type) Strengthen appropriately when step-up ratio output current large. required, short wire. RSENSE: CFB: that fzfb 100kHz.
7/11
XC9106/XC9107 Series
TEST CIRCUITS
Circuit Circuit
RSENSE RFB1
VOUT
RFB2
Circuit
Circuit
RSENSE
RFB1 RFB2
Circuit
RFB2 RSENSE
RFB1
8/11
XC9106/XC9107
Series
PACKAGING INFORMATION
SOT-25 (SOT-23-5) USP-6B
(0.45 (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)-0.05
+0.0
Cross Section
5-0.2+0.05
0.2+0.05
+0.1 0.25 +0.1
0.25
Note: Pin1 larger than other pins.
USP-6B Recommended Pattern Layout
USP-6B Recommended Metal Mask Design
0.1+0.03
0.5+0.1 0.5+0.1
1.6+0.15
9/11
(0.05) -0.005
+0.15
+0.01
XC9106/XC9107 Series
MARKING RULE
SOT-25
Represents product series
MARK
PRODUCT SERIES XC9106D00xMx XC9107D00xMx
SOT-25 (TOP VIEW) Represents oscillation frequency MARK OSCILLATION FREQUENCY 100kHz 300kHz PRODUCT SERIES XC9106/07D001Mx XC9106/07D003Mx
Represents production number reverse character repeated excepted)
USP-6B
Represents product series MARK USP-6B (TOP VIEW) PRODUCT SERIES XC9106D00xDx XC9107D00xDx
Represents voltage MARK PRODUCT SERIES XC9106D00xDx XC9107D00xDx
Represents oscillation frequency MARK OSCILLATION FREQUENCY 100kHz 300kHz PRODUCT SERIES XC9106/07D001Dx XC9106/07D003Dx
Represents production number repeated excepted). Note: character inversion used.
10/11
XC9106/XC9107
Series
products product specifications contained herein subject change without notice improve performance characteristics. Consult representatives before use, confirm that information this catalog date. assume responsibility infringement patents, patent rights, other rights arising from information circuitry this catalog. Please ensure suitable shipping controls (including fail-safe designs aging protection) force equipment employing products listed this catalog. products this catalog developed, designed, approved with such equipment whose failure malfunction reasonably expected directly endanger life cause significant injury user. (e.g. Atomic energy; aerospace; transport; combustion associated safety equipment thereof.) Please products listed this catalog within specified ranges. Should wish products under conditions exceeding specifications, please consult representatives. assume responsibility damage loss abnormal use. rights reserved. part this catalog copied reproduced without prior permission Torex Semiconductor Ltd.
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Control,PWM/PFM Switching Control, Step-Up DC/DC Converters, Externall

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