XC9104B092MR

XC9103/XC9104/XC9105 Series Ceramic Capacitor Compatible, Step-up DC/DC Controllers ETR0404_003 ☆GreenOperation Compatible The XC9103/XC9104/XC9105 series are PWM, PWM/PFM auto switching /manual switching controlled universal step-up DC/DC converter controllers. Output will be stable no matter which load capacitors are used but should a low ESR capacitor be used, RSENSE of about 0.1Ω will be required and phase compensation will be achieved. This allows the use of ceramic capacitors and enables to obtain lower output ripple and small PCB design. Tantalum and electrolytic capacitors can also be used, in which case, RSENSE becomes unnecessary. With 0.9V internal voltage reference and by using externally connected two resistors, output voltage can be set freely within a range of 1.5V to 30V. The series is available in 300 kHz and 180 kHz frequencies, the size of the external components can be reduced. 100 kHz and 500 kHz are also available in custom options. The XC9103 offers PWM operation. The XC9104 offers PWM/PFM automatic switching operation. The PWM operation is shifted to the PFM operation automatically at light load so that it maintains high efficiency over a wide range of load currents. The XC9105 offers both PWM and PWM/PFM auto switching operations and it can be selected by external signal. A current limiter circuit is built-in to the IC (except with the 500 kHz version) and monitors the ripple voltage on the FB pin. Operation is shut down when the ripple voltage is more than 250mV. The operations of the IC can be returned to normal with a toggle of the CE pin or by turning the power supply back on. ■GENERAL DESCRIPTION ■APPLICATIONS ●PDAs ●Cellular phones ●Palmtop computers ●Portable audio systems ●Various multi-function power supplies ■FEATURES Input Voltage Range : 0.9V ~ 10V Supply Voltage Range : 1.8V ~ 10V Output Voltage Range : 1.5V ~ 30V Set freely with the reference voltage 0.9V(±2.0%) and two resistors Oscillation Frequency : 100, 180, 300, 500kHz (±15%) 180, 300kHz only for XC9103/04/05B type (with current limiter) Output Current : more than 400mA (VIN=1.8V, VOUT=3.3V) Controls : PWM (XC9103) PWM/PFM auto-switching (XC9104) PWM/PFM manual switching (XC9105) High Efficiency : 85% (TYP.) Stand-by Current : ISTB=1.0μA (MAX.) Load Capacitors : Low ESR capacitors compatible Current : Operates when Limiter Function ripple voltage=250mV Also available without current limiter (100kHz and 500kHz types are available only without current limiter) Package : SOT-25, USP-6B ■TYPICAL APPLICATION CIRCUIT ■ TYPICAL PERFORMANCE CHARACTERISTICS 1/23 XC9103/XC9104/XC9105 Series ■PIN CONFIGURATION EXT GND FB 6 1 EXT 2 VDD 3 GND NC 5 CE 4 FB VDD CE The dissipation pad for the USP-6B package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the VDD (No.2) pin. (TOP VIEW) ■PIN ASSIGNMENT PIN NUMBER SOT-25 1 2 3 4 5 USP-6B 6 2 4 3 1 5 PIN NAME FB VDD CE CE (/PWM) GND EXT NC FUNCTION Output Resistor Connection Supply Voltage Chip Enable Serves as both PWM/PFM switching pin and CE pin for XC9105 Ground External Transistor Connection No Connection ■ PRODUCT CLASSIFICATION ●Ordering Information XC9103①②③④⑤⑥: PWM Control XC9104①②③④⑤⑥: PWM/PFM Automatic Switching Control XC9105①②③④⑤⑥: PWM/PFM Manual Switching Control DESIGNATOR ① ②③ DESCRIPTION Type of DC/DC Controller Output Voltage SYMBOL B D 09 3 ④ Oscillation Frequency 1 2 5 ⑤ ⑥ Package Device Orientation M D R L DESCRIPTION : With current limiter (180kHz, 300kHz only) : Without current limiter : FB voltage (e.g. FB Voltage=0.9V→②=0, ③=9) : 300kHz : 100kHz : 180kHz : 500kHz : SOT-25 (SOT-23-5) : USP-6B : Embossed tape, standard feed : Embossed tape, reverse feed 2/23 XC9103/XC9104/XC9105 Series ■ BLOCK DIAGRAM ■ ABSOLUTE MAXIMUM RATINGS Ta=25℃ PARAMETER VDD pin Voltage FB pin Voltage CE pin Voltage EXT pin Voltage EXT pin Current Power Dissipation SOT-25 USP-6B SYMBOL VDD FB VCE VEXT IEXT/ Pd Topr Tstg RATINGS -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ VDD + 0.3 ±100 150 100 -40 ~ +85 -40 ~ +125 UNITS V V V V mA mW ℃ ℃ Operating Temperature Range Storage Temperature Range 3/23 XC9103/XC9104/XC9105 Series ■ELECTRICAL CHARACTERISTICS XC9103B092MR, XC9104B092MR, XC9105B092MR XC9103D092MR, XC9104D092MR, XC9105D092MR PARAMETER Output Voltage Output Voltage Range FB Control Voltage Supply Voltage Range (*1) SYMBOL VOUT VOUTSET VFB VDD VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY VLMT EFFI TSS VCEH VCEL VPWMH VPWML REXTH REXTL ICEH ICEL IFBH IFBL CONDITIONS VIN=VOUTSETx0.6, VDD=3.3V IOUT=10mA, Using 2SD1628 MIN. 3.234 1.5 0.882 1.8 (FOSC=180kHz) TYP. MAX. 3.300 0.900 45 17 180 81 28 250 85 10.0 24 16 3.366 30.0 0.918 10.0 0.9 0.8 0.7 64 24 1.0 207 87 36 330 20.0 0.20 VDD-1.0 36 24 0.1 - 0.1 0.1 - 0.1 Ta=25℃ UNITS CIRCUIT V V V V V V V μA μA μA kHz % % mV % ms V V V V Ω ① ② ④ Operation Start Voltage Oscillation Start Voltage (*1) Operation Hold Voltage Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Cycle PFM Duty Rate Overcurrent Sense Voltage (*3) Efficiency Soft-Start Time CE “High” Voltage (*2) CE “Low” Voltage (*2) PWM “High” Voltage (*2) PWM “Low” Voltage (*2) EXT “High” On Resistance EXT “Low” On Resistance CE “High Current CE “Low” Current FB “High” Current FB “Low” Current Recommended circuit using 2SD1628, IOUT=1.0mA No external components, CE connected to VDD, Voltage applied, FB=0V Recommended circuit using 2SD1628, IOUT=1.0mA Same as VST2, VDD=3.3V Same as IDD1, FB=1.2V Same as IDD1, CE=0V Same as IDD1 Same as IDD1 No load (XC9104B/D, 9105B/D) Step input to FB (Pulse width: 2.0μS or more), EXT=Low level voltage (XC9103B, 9104B, 9105B) Recommended circuit using XP161A1355 Same as IDD1 Same as IDD1 IOUT=1.0mA (XC9105B/D) IOUT=1.0mA (XC9105B/D) Same as IDD1, VEXT=VOUT-0.4V Same as IDD1, VEXT=0.4V Same as IDD2, CE=VDD Same as IDD2, CE=0V Same as IDD2, CE=VDD Same as IDD2, CE=0V 153 75 20 170 5.0 0.65 VDD-0.2 - ③ ④ ③ ④ ④ ⑤ ④ ④ ① ⑥ ① ① ⑤ ⑤ ① ① ④ ④ ⑤ ⑤ ⑤ ⑤ Ω μA μA μA μA Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOSFET should be connected. VOUT=3.3V, VIN=2.0V, IOUT=170mA NOTE: *1 Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD>1.8V. Therefore, a VDD of more than 1.8V is recommended when VDD is supplied from VIN or other power sources. *2 With the XC9105 series, the CE pin also serves as a PWM/PFM switching pin. In operation, PWM control is selected when the voltage at the CE pin is more than VDD -0.2V. On the other hand, PWM/PFM automatic switching control at a duty = 25% is selected when the voltage at the CE pin is less than VDD -1.0V and more than VCEH. *3 The overcurrent limit circuit of this IC is designed to monitor the ripple voltage so please select your external components carefully to prevent VLMT being reached under low temperature conditions as well as normal operating conditions. Following current limiter circuit operations, which in turn causes the IC's operations to stop, the operations of the IC can be returned to normal with a toggle of the CE pin or by turning the power supply back on. 4/23 XC9103/XC9104/XC9105 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC9103B093MR, XC9104B093MR, XC9105B093MR XC9103D093MR, XC9104D093MR, XC9105D093MR PARAMETER Output Voltage Output Voltage Range FB Control Voltage Supply Voltage Range (*1) SYMBOL VOUT VOUTSET VFB VDD VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY VLMT EFFI TSS VCEH VCEL VPWMH VPWML REXTH REXTL ICEH ICEL IFBH IFBL CONDITIONS VIN=VOUTSETx0.6, VDD=3.3V IOUT=10mA, Using 2SD1628 MIN. 3.234 1.5 0.882 1.8 (FOSC=300 kHz) TYP. MAX. 3.300 0.900 62 16 300 81 32 300 85 10.0 24 16 3.366 30.0 0.918 10.0 0.9 0.8 0.7 88 22 1.0 345 87 40 380 20.0 0.20 VDD-1.0 36 24 0.1 - 0.1 0.1 - 0.1 Ta=25℃ UNITS CIRCUIT V V V V V V V μA μA μA kHz % % mV % ms V V V V Ω ① ② ④ Operation Start Voltage Oscillation Start Voltage (*1) Operation Hold Voltage Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Cycle PFM Duty Rate Overcurrent Sense Voltage (*3) Efficiency Soft-Start Time CE “High” Voltage (*2) CE “Low” Voltage (*2) PWM “High” Voltage (*2) PWM “Low” Voltage (*2) EXT “High” On Resistance EXT “Low” On Resistance CE “High Current CE “Low” Current FB “High” Current FB “Low” Current Recommended circuit using 2SD1628, IOUT=1.0mA No external components, CE connected to VDD, Voltage applied, FB=0V Recommended circuit using 2SD1628, IOUT=1.0mA Same as VST2, VDD=3.3V Same as IDD1, FB=1.2V Same as IDD1, CE=0V Same as IDD1 Same as IDD1 No load (XC9104B/D, 9105B/D) Step input to FB (Pulse width: 2.0μS or more), EXT=Low level voltage (XC9103B, 9104B, 9105B) Recommended circuit using XP161A1355 Same as IDD1 Same as IDD1 IOUT=1.0mA (XC9105B/D) IOUT=1.0mA (XC9105B/D) Same as IDD1, VEXT=VOUT-0.4V Same as IDD1, VEXT=0.4V Same as IDD2, CE=VDD Same as IDD2, CE=0V Same as IDD2, CE=VDD Same as IDD2, CE=0V 255 75 24 220 5.0 0.65 VDD-0.2 - ③ ④ ③ ④ ④ ⑤ ④ ④ ① ⑥ ① ① ⑤ ⑤ ① ① ④ ④ ⑤ ⑤ ⑤ ⑤ Ω μA μA μA μA Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOSFET should be connected. NOTE: *1 Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD>1.8V. Therefore, a VDD of more than 1.8V is recommended when VDD is supplied from VIN or other power sources. *2 With the XC9105 series, the CE pin also serves as a PWM/PFM switching pin. In operation, PWM control is selected when the voltage at the CE pin is more than VDD -0.2V. On the other hand, PWM/PFM automatic switching control at a duty = 25% is selected when the voltage at the CE pin is less than VDD -1.0V and more than VCEH. *3 The overcurrent limit circuit of this IC is designed to monitor the ripple voltage so please select your external components carefully to prevent VLMT being reached under low temperature conditions as well as normal operating conditions. Following current limiter circuit operations, which in turn causes the IC's operations to stop, the operations of the IC can be returned to normal with a toggle of the CE pin or by turning the power supply back on. 5/23 XC9103/XC9104/XC9105 Series ■ TYPICAL APPLICATION CIRCUIT When obtaining VDD from a source other than VOUT, please insert a capacitor CIN between the VDD pin and the GND pin in order to provide stable operations. Please place CL and CIN as close as to the VOUT and VDD pins respectively and also close to the GND pin. Strengthen the wiring sufficiently. RSENSE should be removed and shorted when the CL capacitor except for ceramic or low ESR capacitor is used. Insert RB and CB when using a bipolar NPN Transistor. ■NOTES ON USE SCE ON OFF OFF SPWM − ON OFF CONDITIONS Chip Disable Duty=25%, PWM/PFM automatic switching PWM By using external signals, the control of the XC9105 series can be alternated between PWM control and PWM/PFM automatic switching control. By inputting a voltage of more than VDD -0.2V to the CE/PWM pin, PWM control can be selected. On the other hand, PWM/PFM automatic switching control can be selected by inputting a voltage of less than VDD -1.0V. With the XC9105, by connecting resistors of the same value (RM1, RM2) as shown in the diagram to the left, it is possible to obtain chip disable with SCE ON and, SPWM ON or OFF, PWM/PFM auto switching at Duty=25% with SCE OFF & SPWM ON, & PFM control with both switches OFF. Note: When operating at VDD -1.8V and below (stepping-up from VIN=0.9V), it is necessary to pull-up to VDD in order to allow the CE/PWM pin reach the VCEH voltage level. Please make sure that the IC is in PWM control (SPWM=OFF) when operations start. If SPWM is ON, there are times when chip enable might not operate. * Please select your external components carefully. 6/23 XC9103/XC9104/XC9105 Series ■ OPERATIONAL EXPLANATION The XC9103/04/05 series are step-up DC/DC converter controller ICs with built-in high speed, low ON resistance drivers. Error amplifier is designed to monitor the output voltage, comparing the feedback voltage (FB) with the reference voltage Vref. In response to feedback of a voltage lower than the reference voltage Vref, the output voltage of the error amp. decreases. This circuit generates the internal reference clock. The ramp wave generator generates a saw-tooth waveform based on outputs from the OSC Generator. The PWM comparator compares outputs from the error amp. and saw-tooth waveform. When the voltage from the Error Amp's output is low, the external switch will be set to ON. This circuit generates PFM pulses. The PWM/PFM automatic switching mode switches between PWM and PFM automatically depending on the load. The PWM/PFM automatic switching mode is selected when the voltage of the CE pin is less than VDD - 1.0V, and the control switches between PWM and PFM automatically depending on the load. PWM/PFM control turns into PFM control when threshold voltage becomes lower than voltage of error amps. PWM control mode is selected when the voltage of the CE pin is more than VDD - 0.2V. Noise is easily reduced with PWM control since the switching frequency is fixed. The series is suitable for noise sensitive portable audio equipment as PWM control can suppress noise during operation and PWM/PFM switching control can reduce consumption current during light load in stand-by. The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer to the notes on next page). To protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load capacitor (CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary. This function controls the operation and shutdown of the IC. When the voltage of the CE pin is 0.2V or less, the mode will be disable, the channel's operations will stop and the EXT1 pin will be kept at a low level (the external N-type MOSFET will be OFF). When the IC is in a state of disable, current consumption will be no more than 1.0μA. When the CE pin's voltage is 0.65V or more, the mode will be enabled and operations will recommence. 7/23 XC9103/XC9104/XC9105 Series ■ OPERATIONAL EXPLANATION (Continued) < Output Voltage Setting> Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 2 MΩor less. VOUT = 0.9 x (RFB1 + RFB2) / RFB2 The value of CFB1, speed-up capacitor for phase compensation, should result in fzfb = 1/(2π×CFB×RFB1) equal to 5 to 30kHz. Adjustments are required depending on the application, value of inductance (L), and value of load capacity (CL). fzfb = 30kHz (L=10μH) fzfb = 20kHz (L=22μH) fzfb = 10kHz (L=47μH) [ Example of Equation ] RFB1 : 120kΩ RFB2 : 45kΩ CFB : 47pF (fzfb = 30kHz, L = 10μH) 68pF (fzfb = 20kHz, L = 22μH) 130pF (fzfb = 10kHz, L = 47μH) < The use of ceramic capacitor CL > The circuit of the XC9103/04/05 series is organized by a specialized circuit, which reenacts negative feedback of both voltage and current. Also by insertion of approximately 100mΩ of a low and inexpensive sense resistor as current sense, a high degree of stability is possible even using a ceramic capacitor, a condition which used to be difficult to achieve. Compared to a tantalum condenser, because the series can be operated in a very small capacity, it is suited to use of the ceramic capacitor, which is cheap and small. < External Components > Tr :*When a MOSFET is used: XP161A1355PR (N-ch Power MOSFET, TOREX) Note*: As the breakdown voltage of XP161A1355 is 8V, take care with the power supply voltage. With output voltages over 6V, use the XP161A1265 with a breakdown voltage of 12V. VST1: XP161A1355PR =1.2V (MAX.) XP161A1265PR = 1.5V (MAX.) :MA2Q737 (Schottky type, MATSUSHITA) :When Using Ceramic Type :22μH (CDRH5D28, SUMIDA, FOSC = 100, 180kHz) 10μH (CDRH5D18, SUMIDA, FOSC = 300, 500kHz) :10V 10μF (Ceramic Type, LMK325BJ106ML, TAIYO YUDEN) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) :100mΩ (FOSC = 180, 300, 500kHz) 50mΩ (FOSC = 100kHz) :Tantalum Type :22μH (CDRH5D28, SUMIDA, FOSC = 300kHz) 47μH (CDRH5D28, SUMIDA, FOSC = 100, 180kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 → 22μH 10μH (CDRH5D18, SUMIDA, FOSC = 500kHz) :16V, 47μF (Tantalum Type 16MCE476MD2, NICHICHEMI) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) :Not required, but short out the wire. :AL Electrolytic Type :22μH (CDRH5D28 SUMIDA, FOSC = 300kHz) 47μH (CDRH5D28 SUMIDA, FOSC = 100, 180kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 → 22μH :16V, 100μF (AL Electrolytic Type) + 10V, 2.2μF (Ceramic Type) Strengthen appropriately when step-up ratio and output current is large. :Not required, but short out the wire. :Set up so that fzfb = 100kHz. *When a NPN Tr. Is used: 2SD1628 (SANYO) RB : 500Ω(Adjust with Tr's HSE or load) CB : 2200pF (Ceramic type set so that RB and pole is less than 70% of FOSC) CB