G5107 Global Mixed-mode Technology Inc. Low-Voltage, High-Efficiency, Step-up DC-DC Converter Features General Description The G5107 boost converter in corporate high-performance, voltage-mode, fixed-frequency (at 1MHz), pulse width modulation (PWM) circuitry with a built-in 0.3Ω n-channel MOSFET to provide a highly efficient regulator. The low start-up input voltage 1.2V makes G5107 suitable for 2~4 cells alkaline battery applications. 1.2V Low Start-up Input Voltage Deliver 3.3V 100mA from 2 Alkaline Battery Cell 90% Efficiency Adjustable Output from 2.5V to 5.5V 1.5A, 0.3Ω, 7V Power MOSFET 1.2V to 5.5V Input Range Fast 1MHz Switching Frequency SOT-23-6 & TSOT-23-6 Package High switching frequency allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of various types of output capacitors. The device can produce an output voltage from 2.5V to 5.5V. Applications MP3 Players PDAs Digital Still Cameras Portable Applications Hand-Held Devices The G5107 is available in a space-saving SOT-23-6 & TSOT-23-6 package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G5107TBU G5107TPU 5107xx 5107xx -40°C ~ +85°C -40°C ~ +85°C SOT-23-6 TSOT-23-6 Note: TB : SOT23-6 TP: TSOT-23-6 U: Tape & Reel Pin Configuration Typical Application Circuit L1 VIN C1 100µF SW 1 6 + VOUT 3.3V 4.7µH 1N5819 VCC VCC SW R1 + GND G5107 2 5 SHDN COMP GND FB 4 3 C2 1µF SHDN FB C3 100µF COMP RC R2 CC SOT-23-6 / TSOT-23-6 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 1 G5107 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Junction Temperature . . . . . . . . . . . . . . . . . . . . .125°C Storage Temperature. . . . . . . . . . . . . . -65°C to 150°C Reflow Temperature (soldering, 10sec) . . . . . . 260°C VCC, SHDN , SW to GND. . . . . . . . . . . . . -0.3V to +7V FB, COMP to GND. . . . . . . . . . . . . . . . . . -0.3V to VCC Operating Temperature. . . . . . . . . . . . .. -40°C to 85°C Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. Electrical Characteristics (VIN = 1.5V, VCC = V SHDN = 3V, TA = 25°C) PARAMETER Start-Up Voltage Range CONDITIONS IOUT=1mA Operating Voltage Range VFB = 1.5V (no switching) Quiescent Current MIN TYP MAX UNITS --- 1.2 --- V 2.5 --- 5.5 V --- 100 200 µA VFB = 0V (switching) --- --- 2 mA V SHDN = 0V --- 0.1 1 µA 1.26 1.28 1.3 V --- 100 --- ppm/°C Error Amp Transconductance --- 0.76 --- mmho Error Amp Voltage Gain --- 100 --- V/V Output Over Voltage Protection --- 5 10 % 0.7 1 1.3 MHz 85 --- --- % FB Comparator Trip Point Switching Frequency Initial Accuracy Temperature Coefficient VFB = 0V Maximum Duty Switch RDS(ON) ISW = 150mA --- 0.3 0.5 Ω Switch Leakage Current VSW = 7V --- 0.1 10 µA Switch Current Limit 1.2 1.5 1.8 A Switch Current Limit (startup) --- 0.6 --- A SHDN Pin Voltage High 0.9xVCC --- --- V SHDN Pin Voltage Low --- --- 0.1xVCC V TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 2 G5107 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC= +3.6V, V SHDN =+3.6V, L=4.7μH, TA=25°C, unless otherwise noted.) IQ_SW vs. Temperature 1 1 0.9 0.9 0.8 0.8 0.7 0.7 IQ_SW (mA) IQ_SW (mA) IQ_SW vs. VCC 0.6 0.5 0.4 0.3 0.6 0.5 0.4 0.3 0.2 0.2 0.1 0.1 0 0 2 2.5 3 3.5 4 4.5 5 5.5 -40 6 -20 VCC (V) 40 60 80 100 IQ_NoSW vs. Temperature 150 150 125 125 IQ_NoSW (µA) IQ_NoSW (µA) 20 Temperature (°C) IQ_NoSW vs. VCC 100 75 50 100 75 50 25 25 0 0 2 2.5 3 3.5 4 4.5 5 5.5 -40 6 -20 VCC (V) 0 20 40 60 80 100 Temperature (°C) IQ_SHDN vs. VCC IQ_SHDN vs. Temperature 0.1 0.1 0.08 0.08 0.06 0.06 0.04 0.04 IQ_SHDN (µA) IQ_SHDN (µA) 0 0.02 0 -0.02 -0.04 0.02 0 -0.02 -0.04 -0.06 -0.06 -0.08 -0.08 -0.1 -0.1 2 2.5 3 3.5 4 4.5 5 5.5 6 -40 VCC (V) -20 0 20 40 60 80 100 Temperature (°C) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 3 G5107 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Feedback Voltage vs. Temperature 1.3 1.3 1.295 1.295 Feedback Voltage (mV) Feedback Voltage (mV) Feedback Voltage vs. VCC 1.29 1.285 1.28 1.275 1.27 1.265 1.29 1.285 1.28 1.275 1.27 1.265 1.26 1.26 2 2.5 3 3.5 4 4.5 5 5.5 -40 6 -20 Frequency vs. VCC 40 60 80 100 Frequency vs. Temperature 1 1 0.9 0.9 0.8 0.8 Frequency (MHz) Frequency (MHz) 20 Temperature (°C) VCC (V) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 2 2.5 3 3.5 4 4.5 5 5.5 6 -40 -20 VCC (V) 0 20 40 60 80 100 Temperature (°C) SW R_on vs. VCC SW R_on vs. Temperature 0.5 0.5 0.45 0.45 0.4 0.4 0.35 0.35 SW R_on (Ω) SW R_on (Ω) 0 0.3 0.25 0.2 0.15 0.3 0.25 0.2 0.15 0.1 0.1 0.05 0.05 0 0 2 2.5 3 3.5 4 4.5 5 5.5 -40 6 VCC (V) -20 0 20 40 60 80 100 Temperature (°C) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 4 G5107 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Current Limit vs. Temperature 1.8 1.8 1.7 1.7 Current Limit (A) Current Limit (A) Current Limit vs. VCC 1.6 1.5 1.4 1.6 1.5 1.4 1.3 1.3 1.2 1.2 2 2.5 3 3.5 4 VCC (V) 4.5 5 5.5 -40 6 -20 0 20 40 60 80 100 Temperature (°C) Stability Waveform Stability Waveform Stability Waveform Stability Waveform TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 5 G5107 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Load Transient Load Transient Efficiency vs. Load Current 100 90 90 80 80 70 Efficiency (%) Efficiency (%) Efficiency vs. Load Current 100 VIN=1.5V VIN=2.0V 60 50 VIN=2.5V 40 30 VIN=3.0V 20 VIN=2.0V 60 VIN=2.5V 50 VIN=4.0V VIN=3.5V 40 VIN=1.5V 30 VIN=3.0V VOUT = 5.0V 10 0 0 1 10 100 1 1000 Load Current (mA) 10 100 1000 10000 Load Current (mA) Max. Output Current vs. Input Voltage Recommended Minimum Footprint 1200 Max. Output Current (mA) 70 20 VOUT = 3.3V 10 VIN=4.5V SOT-23-6/ TSOT-23-6 VOUT = 3.3V 1000 800 600 400 200 VOUT = 5.0V 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 6 G5107 Global Mixed-mode Technology Inc. Pin Description PIN NAME 1 2 SW GND FUNCTION 3 4 FB SHDN Feedback Pin. Active Low Shutdown Pin. 5 6 COMP VCC Compensation Pin. Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. Switch Pin. The drain of the internal NMOS power switch. Connect this pin to inductor. Ground Pin. Block Diagram FB SW COMP COMPARATOR A1 + DRIVER R A2 + S CONTROL Q M1 1.28V RAMP GENERATOR VREF + OC 1MHz OSCILLATOR VCC GND SHDN White LED Driver D1 L1 VOUT VIN C1 M1 VCC ON OFF D2 (Optional) C2 SW SHDN G5107 GND R2 FB COMP R3 R4 R1 RC CC VBIAS VDIM PWM Dimming TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 7 Global Mixed-mode Technology Inc. G5107 Function Description Capacitor Selection Various types of output capacitor are suitable for G5107. To obtain small output ripple, the small size of ceramic capacitors are suitable for G5107 applications. X5R and X7R types are recommended because they retain their capacitance over wider voltage and temperature ranges than other types such as Y5V or Z5U. A 4.7µF~22µF output capacitor is enough for most applications. Normal Operation The G5107 uses a constant frequency control scheme to provide excellent line and load regulation. Operation can be best understood by referring to the block diagram. At the start of each oscillator cycle, the SR latch is set, which turns on the power switch M1. An artificial ramp is generated to the positive terminal of the PWM comparator A2. When this voltage exceeds the level at the negative input of A2, the SR latch is reset turning off the power switch. The level at the negative input of A2 is set by the error amplifier A1, and is simply an amplified version of the difference between the feedback voltage and the reference voltage of 1.28V. In this manner, the error amplifier sets the correct peak current level (DCM) or duty (CCM) to keep the output in regulation. To using a low cost Tantalum/Electrolytic type capacitors, a 47µF~100µF output capacitor is enough. Another small 1µF ceramic is recommended to place near G5107 VCC pin to bypass high frequency noise generated from the higher ESR output capacitor. Diode Selection Schottky diodes, with their low forward voltage drop and fast reverse recovery, are the ideal choices for G5107 applications. The forward voltage drop of a Schottky diode represents the conduction losses in the diode, while the diode capacitance (CT or CD) represents the switching losses. For diode selection, both forward voltage drop and diode capacitance need to be considered. Schottky diodes with higher current ratings usually have lower forward voltage drop and larger diode capacitance, which can cause significant switching losses at the 1MHz switching frequency of the G5107. A Schottky diode rated at 2A is sufficient for most G5107 applications. Over Voltage Protection Over voltage protect function is designed to prevent the output accidentally damage the load. Once the device detects over voltage (nominalx1.05) at the output, the internal NMOS switch turned off to stop power input. Application Information Inductor Selection A 2.2µH~10µH inductor is recommended for small ripple applications. Small form factor and high efficiency are the major concerns for most G5107 applications. Inductor with low core losses and small DCR (cooper wire resistance) at 1MHz are good choice for G5107 applications. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 8 G5107 Global Mixed-mode Technology Inc. Package Information C D L E H θ1 e1 e A A2 A1 b SOT-23-6 (TB) Package Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. 3. Tolerance ±0.1000 mm (4mil) unless otherwise specified 4. Coplanarity: 0.1000mm 5. Dimension L is measured in gage plane MIN. DIMENSION IN MM NOM. MAX. MIN. DIMENSION IN INCH NOM. MAX. A A1 1.00 0.00 1.10 ----- 1.30 0.10 0.039 0.000 0.043 ----- 0.051 0.004 A2 b C D E e 0.70 0.35 0.10 2.70 1.40 ----- 0.80 0.40 0.15 2.90 1.60 1.90(TYP) 0.90 0.50 0.25 3.10 1.80 ----- 0.028 0.014 0.004 0.106 0.055 ----- 0.031 0.016 0.006 0.114 0.063 0.075(TYP) 0.035 0.020 0.010 0.122 0.071 ----- e1 H L θ1 ----2.60 0.37 0.95 2.80 ------ ----3.00 ----- ----0.102 0.015 0.037 0.110 ----- ----0.118 ----- 1° 5° 9° 1° 5° 9° SYMBOL TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 9 G5107 Global Mixed-mode Technology Inc. C D L E1 E θ1 e e1 A2 A y b A1 TSOT-23-6 (TP) Package Note: 1. Dimension D does not include mold flash, protrusions or tate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.1mm PER end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.15mm PER side. 2. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. SYMBOL A A1 A2 b C D E E1 e e1 L y θ1 MIN. DIMENSION IN MM NOM. 0.75 0.00 0.70 0.35 0.10 2.80 2.60 1.50 0.37 ----0° --------0.75 --------2.90 2.80 1.60 0.95 BSC 1.90 BSC ------------- MAX. MIN. 0.90 0.10 0.80 0.51 0.25 3.00 3.00 1.70 0.030 0.000 0.028 0.014 0.004 0.110 0.102 0.059 ----0.10 8° 0.015 DIMENSION IN INCH NOM. 0° --------0.030 --------0.114 0.110 0.063 0.0374 BSC 0.0748 BSC ------------- MAX. 0.035 0.004 0.031 0.020 0.010 0.118 0.118 0.067 ----0.004 8° Taping Specification PACKAGE Q’TY/REEL SOT-23-6 TSOT-23-6 3,000 ea 3,000 ea Feed Direction SOT-23-6/TSOT-23-6 Package Orientation GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Preliminary May 11, 2006 10