FP6292 Low-Noise Step-Up Current Mode PWM IC General Description The FP6292 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.75Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 5 external component counts. The non-inverting input of error amplifier connects to a 1.24V precision reference voltage and internal soft-start function can reduce the inrush current The FP6292 is available in the TSOT23-6L / TSOT23-5L package and provides space-saving PCB for the application fields. Features Precision Feedback Reference Voltage: 1.24V (±4%) Under Voltage Lockout Protection Over Voltage Protection Over Temperature Protection Internal Soft-Start Zero Shutdown Current Adjustable Output up to 24V Package: TSOT23-6L / TSOT23-5L Applications LCD Displays Digital Cameras Camcorders Typical Application Circuit This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 1/13 FP6292 Function Block Diagram Pin Descriptions TSOT23-6L Name No. I / O Description LX 1 O Power Switch Output GND 2 P IC Ground FB 3 I Error Amplifier Inverting Input EN 4 I Enable Control (Active High) OVP 5 O Over Voltage Protection VCC 6 P IC Power Supply TSOT23-5L Name No. I / O Description LX 1 O Power Switch Output GND 2 P Ground FB 3 I Error Amplifier Inverting Input EN 4 I Enable Control (Active High) VCC 5 P IC Power Supply This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 2/13 FP6292 Marking Information TSOT23-6L / TSOT23-5L Lot Number: Wafer lot number’s last two digits For Example: 132386TB 86 Year: Production year’s last digit Part Number Code: Part number identification code for this product. It should be always “AE”. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 3/13 FP6292 Ordering Information Operating Temperature Package MOQ Description FP6292iR-G1 Part Number Code AE -40°C ~ 85°C TSOT23-5L 3000EA Tape & Reel FP6292hR-G1 AE -40°C ~ 85°C TSOT23-6L 3000EA Tape & Reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage VCC 0 6 V OVP Voltage VOVP 0 25 V VLX 0 25 V 0 6 V LX Input Voltage EN,FB Voltage Power Dissipation PD Thermal Resistance (Note1) θJA Junction Temperature TJ TSOT23-5L @TA=25°C 455 TSOT23-6L @TA=25°C 455 TSOT23-5L +220 TSOT23-6L +220 mW °C / W +150 °C Operating Temperature TOP -40 +85 °C Storage Temperature TST -65 +150 °C +260 °C Lead Temperature (soldering, 10 sec) Note1: θJA is measured in the natural convection at TA=25°C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. IR Re-flow Soldering Curve This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 4/13 FP6292 Recommended Operating Conditions (Note 1) Max. Unit Junction Temperature Range TJ -40 +125 °C Operating Temperature Range TA -40 +85 °C Parameter Symbol Conditions Min. Typ. Note 1: The device is not guaranteed to function outside its operating conditions. DC Electrical Characteristics (VCC=3.7V, TA=25°C,unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit 5.5 V System Supply Input Input Supply Range VCC Under Voltage Lockout 2.7 VUVLO 2.2 V Quiescent Current ICC VFB=1.3V, No switching 0.3 mA Average Supply Current ICC VFB=1.0V, Switching 0.5 mA Shutdown Supply Current ICC VEN=GND 0.1 µA FOSC VFB=1.0V Oscillator Operation Frequency Frequency Change with Voltage Frequency Change with Temperature Maximum Duty Cycle 0.9 1.2 1.5 MHZ △f / △V VCC=2.7V to 5.5V 2 % △f / △T TA=-40°C to 85°C 10 % TDUTY 85 VREF 1.19 % Reference Voltage Feedback Voltage Feedback Voltage Change with Temperature △VREF / △T Line Regulation 1.24 1.29 V TA=-40°C to 25°C 1.5 TA=25°C to 85°C 1.5 VCC=2.7V～5.5V 0.01 %/V 0.75 Ω % MOSFET On Resistance of Driver RDS (ON) ILX=0.1A Protection OVP Threshold Voltage VOVP 24 V OVP Sink Current ISINK 5 µA OCP Current IOCP 750 mA OTP Temperature TOTP +150 °C Enable Voltage VEN Shutdown Voltage VEN 1.5 V 0.4 V This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 5/13 FP6292 Typical Operating Characteristics Efficiency vs. Output Current Efficie ncy v s. Output Current 90 95 VIN=5.0V 88 VIN=5.0V 86 85 Efficiency (%) Efficiency (%) 90 VIN=3.7V 80 84 82 VIN=3.7V 80 78 76 75 VOUT=12V, L=10µH VOUT=20V, L=10µH 74 70 72 0 20 40 60 80 0 100 120 140 160 180 200 20 1.6 1.2 1.4 -40℃ 25℃ 85℃ 1.0 0.8 100 1.0 -40℃ 0.8 25℃ 85℃ 0.6 3 3.5 4 4.5 5 5.5 2.5 3 3.5 Input Voltage (V) 4 4.5 5 5.5 Input Voltage (V) Switching Fre que ncy vs. Te mpe rature Switching Frequency vs. Input Voltage 1.25 1.26 1.24 1.25 Frequency (MHz) Frequency (MHz) 80 0.4 2.5 1.23 1.22 1.21 1.20 1.24 1.23 1.22 1.21 VIN=3.7V 1.20 1.19 1.19 2.5 3 3.5 4 4.5 5 -60 5.5 -40 -20 1.256 1.260 Feedback Voltage (V) 1.264 1.252 1.248 1.244 100 1.244 1.236 4.5 80 1.248 1.236 4 60 1.252 1.240 3.5 40 1.256 1.240 3 20 Fee dback Voltage vs. Tempe rature Feedback Voltage vs. Input Voltage 1.260 2.5 0 Temperature (℃) Input Voltage (V) Feedback Voltage (V) 60 Shutdown Voltage vs. Input Voltage 1.4 Shut Down Voltage (V) Enable Voltage (V) Enable Voltage vs. Input Voltage 1.8 1.2 40 Output Current (mA) Output Current (mA) 5 VIN=3.7V -60 5.5 -40 -20 0 20 40 60 80 100 Temperature (℃) Input Voltage (V) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 6/13 FP6292 Switching Current vs. Input Voltage 0.84 0.28 0.74 Switching Current (mA) Quiescent Current (mA) Quiesce nt Current v s. Input Voltage 0.30 0.26 0.24 0.22 0.20 0.18 0.64 0.54 0.44 0.34 0.24 2.5 3 3.5 4 4.5 5 5.5 2.5 3 Input Voltage (V) 4 4.5 5 5.5 Input Voltage (V) Curre nt Limit v s. Input Voltage M aximum Duty Cycle vs. Input Voltage 850 93.2 Maximum Duty Cycle (%) 800 Current Limit (mA) 3.5 750 700 650 600 550 500 VOUT=12V, L=10µH 450 400 92.8 92.4 92.0 91.6 91.2 90.8 90.4 2.5 3 3.5 4 4.5 5 5.5 2.5 Input Voltage (V) 3 3.5 4 4.5 5 5.5 Input Voltage (V) Load Transient Response Output Ripple L=10µH, COUT=10µF L=10µH, COUT=10µF VOUT VLX IOUT VOUT VIN=3.7V, VOUT=12V, IOUT=30mA~120mA VIN=3.7V, VOUT=12V, IOUT=120mA Power On from EN Power Off from EN VEN VEN VIN VIN VOUT VOUT IL IL VIN=3.7V, VOUT=12V, IOUT=120mA VIN=3.7V, VOUT=12V, IOUT=120mA This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 7/13 FP6292 Function Description Operation The FP6292 is a current mode boost converter. The constant switching frequency is 1.2MHz and operates with pulse width modulation (PWM). Build-in 24V / 0.75A MOSFET provides a high output voltage. The control loop architecture is peak current mode control; therefore slope compensation circuit is added to the current signal to allow stable operation for duty cycles larger than 50%. Soft Start Function Soft start circuitry is integrated into FP6292 to avoid inrush current during power on. After the IC is enabled, the output of error amplifier is clamped by the internal soft-start function, which causes PWM pulse width increasing slowly and thus reducing input surge current. Over Voltage Protection (OVP) In some condition, the resistive divider may be unconnected, which will cause PWM signal to operate with maximum duty cycle and output voltage is boosted higher and higher. The power MOSFET will be turned off immediately, when the output voltage exceeds the OVP threshold level. The FP6292’s OVP threshold is 24V. Over Temperature Protection (OTP) FP6292 will turn off the power MOSFET automatically when the internal junction temperature is over 150°C. The power MOSFET wake up when the junction temperature drops 30°C under the OTP threshold temperature. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 8/13 FP6292 Application Information General Application Circuit D1 MSCD 1020 L1 10µH VOUT 12V VIN 2.7V~5.5V R1 140K C1 4.7µF 5 LX VCC C2 4.7µF~10µF 1 FP6292 4 EN 2 FB GND 3 R2 16K TSOT23-5L This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 9/13 FP6292 Inductor Selection Inductance value is decided based on different condition. 4.7 to 22µH inductor value is recommended for general application circuit. There are three important inductor specifications, DC resistance, saturation current and core loss. Low DC resistance has better power efficiency. Also, it avoid inductor saturation which will cause circuit system unstable and lower core loss at 1.2MHz. Capacitor Selection The output capacitor is required to maintain the DC voltage. Low ESR capacitors are preferred to reduce the output voltage ripple. Ceramic capacitor of X5R and X7R are recommended, which have low equivalent series resistance (ESR) and wider operation temperature range. Diode Selection Schottky diodes with fast recovery times and low forward voltages are recommended. Ensure the diode average and peak current rating exceed the average output current and peak inductor current. In addition, the diode’s reverse breakdown voltage must exceed the output voltage. Output Voltage Programming The output voltage is set by a resistive voltage divider from the output voltage to FB. The output voltage is: R1 VOUT 1.24 V 1 R2 The recommended resistor value is summarized below: VOUT (V) R1 (kΩ) R2 (kΩ) 5 12 15 18 140 140 145 150 46 16 13 11 Layout Considerations 1. The power traces, consisting of the GND trace, the LX trace and the VCC trace should be kept short, direct and wide. 2. LX、L and D switching node, wide and short trace to reduce EMI. 3. Place CIN near VCC pin as closely as possible to maintain input voltage steady and filter out the pulsing input current. 4. The resistive divider R1and R2 must be connected to FB pin directly as closely as possible. 5. FB is a sensitive node. Please keep it away from switching node, LX. 6. The GND of the IC, CIN and COUT should be connected close together directly to a ground plane. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 10/13 FP6292 This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 11/13 FP6292 Package Outline TSOT23-5L Unit: mm Symbols Min. (mm) Max. (mm) A 0.750 0.800 A1 0.000 0.050 A2 0.700 0.775 b 0.350 0.500 c 0.100 0.200 D 2.800 3.000 E 2.600 3.000 E1 1.500 1.700 e 0.950 BSC e1 1.900 BSC L 0.370 0.600 L1 0.600 REF L2 0.250 BSC R 0.100 R1 0.100 0.250 θ° 0° 8° θ1 4° 12° Note: 1. Dimension “D” does not include molding flash, protrusions or gate burrs. 2. Dimension “E1” does not include inter-lead flash or protrusions. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 12/13 FP6292 TSOT23-6L Unit: mm Symbols Min. (mm) Max. (mm) A 0.750 0.800 A1 0.000 0.050 A2 0.700 0.775 b 0.350 0.500 c 0.100 0.200 D 2.800 3.000 E 2.600 3.000 E1 1.500 1.700 e 0.950 BSC e1 1.900 BSC L 0.370 0.600 L1 0.600 REF L2 0.250 BSC R 0.100 R1 0.100 0.250 θ° 0° 8° θ1 4° 12° Note: 1. Dimension “D” does not include molding flash, protrusions or gate burrs. 2. Dimension “E1” does not include inter-lead flash or protrusions. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Rev. 0.66 Website: http://www.feeling-tech.com.tw 13/13