G5107 GMT | Alldatasheet
Document overview
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Technical content
Features
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
Applications
MP3 Players PDAs Digital Still Cameras Portable Applications Hand-Held Devices General Description The G5107 boost converter in corporate high-per- formance, 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 applica- tions. High switching frequency allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dy- namics, allowing the use of various types of output capacitors. The device can produce an output voltage from 2.5V to 5.5V. The G5107 is available in a space-saving SOT-23-6 & TSOT-23-6 package.
Ordering Information
NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G5107TBU 5107xx -40 °C ~ +85°C SOT-23-6 G5107TPU 5107xx -40 °C ~ +85°C TSOT-23-6 Note: TB : SOT23-6 TP: TSOT-23-6 U: Tape & Reel Pin Configuration Typical Application Circuit VCC SHDN SOT-23-6 / TSOT-23-6 G5107 1SW GND FB
5 COMP
1µF 4.7µH 100µF VOUT 3.3V RC CC 100µF VCC SHDN SOT-23-6 / TSOT-23-6 G5107 1SW GND FB 1µF 4.7µH 100µF VOUT 3.3V RC CC 100µF
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Absolute Maximum Ratings 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 CONDITIONS MIN TYP MAX UNITS Start-Up Voltage Range IOUT=1mA --- 1.2 --- V Operating Voltage Range 2.5 --- 5.5 V VFB = 1.5V (no switching) --- 100 200 µA VFB = 0V (switching) --- --- 2 mA Quiescent Current V SHDN = 0V --- 0.1 1 µA Initial Accuracy 1.26 1.28 1.3 V FB Comparator Trip Point Temperature Coefficient --- 100 --- ppm/ °C Error Amp Transconductance --- 0.76 --- mmho Error Amp Voltage Gain --- 100 --- V/V Output Over Voltage Protection --- 5 10 % Switching Frequency VFB = 0V 0.7 1 1.3 MHz Maximum Duty 85 --- --- % Switch RDS(ON) I SW = 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
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC= +3.6V, V SHDN =+3.6V, L=4.7μH, TA=25°C, unless otherwise noted.) 100 125 150 22 . 533 . 544 . 555 . 56 VCC (V) IQ_NoSW (µA) 100 125 150 -40 -20 0 20 40 60 80 100 Temperature (°C) IQ_NoSW (µA) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 2 2.5 3 3.5 4 4.5 5 5.5 6 VCC (V) IQ_SW (mA) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 -40 -20 0 20 40 60 80 100 Temperature (°C) IQ_SW (mA) -0.1 -0.08 -0.06 -0.04 -0.02 0.02 0.04 0.06 0.08 0.1 2 2.5 3 3.5 4 4.5 5 5.5 6 VCC (V) IQ_SHDN (µA) -0.1 -0.08 -0.06 -0.04 -0.02 0.02 0.04 0.06 0.08 0.1 -40 -20 0 20 40 60 80 100 Temperature (°C) IQ_SHDN (µA) IQ_SW vs. VCC IQ_SW vs. Temperature IQ_NoSW vs. VCC IQ_NoSW vs. Temperature IQ_SHDN vs. VCC IQ_SHDN vs. Temperature
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 1.26 1.265 1.27 1.275 1.28 1.285 1.29 1.295 1.3 2 2.5 3 3.5 4 4.5 5 5.5 6 VCC (V) Feedback Voltage (mV) 1.26 1.265 1.27 1.275 1.28 1.285 1.29 1.295 1.3 - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature (°C) Feedback Voltage (mV) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 22 . 533 . 544 . 555 . 56 VCC (V) Frequency (MHz) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 -40 -20 0 20 40 60 80 100 Temperature (°C) Frequency (MHz) 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 22 . 533 . 544 . 555 . 56 VCC (V) SW R_on (Ω) 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 -40 -20 0 20 40 60 80 100 Temperature (°C) SW R_on (Ω) Feedback Voltage vs. VCC Feedback Voltage vs. Temperature Frequency vs. VCC Frequency vs. Temperature SW R_on vs. VCC SW R_on vs. Temperature
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 1.2 1.3 1.4 1.5 1.6 1.7 1.8 22 . 533 . 544 . 555 . 56 VCC (V) Current Limit (A) 1.2 1.3 1.4 1.5 1.6 1.7 1.8 -40 -20 0 20 40 60 80 100 Temperature (°C) Current Limit (A) Stability Waveform Stability Waveform Current Limit vs. VCC Current Limit vs. Temperature Stability Waveform Stability Waveform
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 100 1 10 100 1000 Load Current (mA) Efficiency (%) VIN=1.5V VIN=2.0V VIN=2.5V VIN=3.0V VOUT = 3.3V 100 1 10 100 1000 10000 Load Current (mA) Efficiency (%)VIN=1.5V VIN=2.0V VIN=2.5V VIN=3.0V VIN=3.5V VIN=4.0V VIN=4.5V VOUT = 5.0V Load Transient Load Transient Efficiency vs. Load Current Efficiency vs. Load Current Recommended Minimum Footprint SOT-23-6/ TSOT-23-6 200 400 600 800 1000 1200 Input Voltage (V) Max. Output Current (mA) VOUT = 3.3V VOUT = 5.0V Max. Output Current vs. Input Voltage
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Pin Description PIN NAME FUNCTION 1 SW Switch Pin. The drain of the internal NMOS power switch. Connect this pin to inductor. 2 GND Ground Pin. 3 FB Feedback Pin. 4 SHDN Active Low Shutdown Pin. 5 COMP Compensation Pin. 6 VCC Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. Block Diagram VREF SWFB 1.28V GND CONTROL DRIVER OC SHDN R S Q 1MHz OSCILLATOR VCC COMPARATOR A2+ RAMP GENERATOR COMP VREF SWFB 1.28V GND CONTROL DRIVER OC SHDN R S Q 1MHz OSCILLATOR VCC COMPARATOR A2+ RAMP GENERATOR COMP White LED Driver (Optional)C2 D1L1 VCC G5107 SHDN FB COMP VIN ON OFF SW GND VOUT R1R4R3 RC CC VBIAS VDIM PWM Dimming White LED Driver (Optional)C2 D1L1 VCC G5107 SHDN FB COMP VIN ON OFF SW GND VOUT R1R4R3 RC CC VBIAS VDIM PWM Dimming
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. Function Description 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 dia- gram. 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 feed- back 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. 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
A 2.2 µH~10µH inductor is recommended for small ripple applications. Small form factor and high effi- ciency are the major concerns for most G5107 appli- cations. Inductor with low core losses and small DCR (cooper wire resistance) at 1MHz are good choice for G5107 applications. 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 tem- perature ranges than other types such as Y5V or Z5U. A 4.7 µF~22µF output capacitor is enough for most applications. To using a low cost Tantalum/Electrolytic type capaci- tors, a 47 µF~100µF output capacitor is enough. An- other small 1µF ceramic is recommended to place near G5107 V CC pin to bypass high frequency noise gener- ated 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 (C T or C D) repre- sents 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.
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc.
Package Information
SOT-23-6 (TB) Package Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 3. Tolerance ±0.1000 mm (4mil) unless otherwise specified 4. Coplanarity: 0.1000mm 5. Dimension L is measured in gage plane θ1 1° 5 ° 9 ° 1 ° 5 ° 9 ° E D H L C b A e E D H L C b A e
Ver: 0.3 Preliminary May 11, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5107Global Mixed-mode Technology Inc. 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 ex- ceed 0.15mm PER side. 2. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost ex- tremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mis- match between the top and bottom of the plastic body. e 0.95 BSC 0.0374 BSC e1 1.90 BSC 0.0748 BSC Taping Specification PACKAGE Q ’TY/REEL SOT-23-6 3,000 ea TSOT-23-6 3,000 ea 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. D E L C b A2 A e y D E L C b A2 A e y Feed Direction SOT-23-6/TSOT-23-6 Package Orientation Feed Direction SOT-23-6/TSOT-23-6 Package Orientation