G5105TBU

G5105 GMT | Alldatasheet

Document overview

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Technical content

Features

„ 90% Efficiency „ Adjustable Output from VIN to 20V „ 0.8A, 0.6Ω, 24V Power MOSFET „ 2.5V to 5.5V Input Range „ Fast 1MHz Switching Frequency „ SOT-23-6 and TSOT-23-6 Package

Applications

„ Small/Medium Size LCD Displays „ Organic LED Bias „ Portable Applications „ Hand-Held Devices General Description The G5105 boost converter in corporate high-per- formance, voltage-mode, fixed-frequency (at 1MHz), pulse width modulation (PWM) circuitry with a built-in 0.6Ω n-channel MOSFET to provide a highly efficient regulator. 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 small, low ESR ceramic output capacitors. The device can produce an output voltage as high as 20V. The G5105 is available in a space-saving SOT-23-6 and TSOT-23-6 package.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G5105TBU 5105xx -40 °C ~ +85°C SOT-23-6 G5105TPU 5105x -40 °C ~ +85°C TSOT-23-6 Note:TB : SOT-23-6 TP: TSOT-23-6 U: Tape & Reel Pin Configuration Typical Application Circuit VCC SHDN SOT-23-6/TSOT-23-6 1SW GND FB

5 COMP

2.5V to 5.5V FB 10µF 4.7µH 10µF CF 47pF VOUT 15V, 40mA 560k RC 3.6kΩ 51kΩ CC 10nF G5105 VCC SHDN SOT-23-6/TSOT-23-6 1SW GND FB 2.5V to 5.5V FB 10µF 4.7µH 10µF CF 47pF VOUT 15V, 40mA 560k RC 3.6kΩ 51kΩ CC 10nF G5105

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Absolute Maximum Ratings Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device.

Electrical Characteristics

(VCC=V SHDN =3.6V, TA=25°C) PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range 2.5 --- 5.5 V Input Voltage UVLO 1.7 2.0 2.3 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 1.25 1.28 1.31 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 V FB = 0.2V 0.7 1 1.3 MHz Maximum Duty 85 --- --- % Switch RDS(ON) I SW = 150mA --- 0.6 1 Ω Switch Leakage Current V SW = 20V --- 0.1 10 µA Switch Current Limit 0.7 0.95 1.3 A SHDN Pin Voltage High 2 --- --- V SHDN Pin Voltage Low --- --- 0.8 V

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC= +3.6V, V SHDN = +3.6V, L=10µH, TA=25°C, unless otherwise noted.) 0.2 0.4 0.6 0.8 1.2 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) IQ_SW (mA) 0.2 0.4 0.6 0.8 1.2 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) IQ_SW (mA) 100 120 140 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) IQ_NOSW (µA) 100 120 140 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) IQ_NOSW (µA) -0.5 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) IQ_SHDN (µA) -0.5 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.5 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) IQ_SHDN (µA) IQ_SW vs. Input Voltage IQ_SW vs. Temperature IQ_NOSW vs. Input Voltage IQ_NOSW vs. Temperature IQ_SHDN vs. Input Voltage IQ_SHDN vs. Temperature

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 1.25 1.26 1.27 1.28 1.29 1.3 1.31 22 . 533 . 544 . 555 . 56 Input Voltage (V) Feedback Voltage (mV) 1.25 1.26 1.27 1.28 1.29 1.3 1.31 - 4 0 - 2 0 0 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 1.1 1.2 22 . 533 . 544 . 555 . 56 Input Voltage (V) Frequency (MHz) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.1 1.2 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) Frequency (MHz) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 22 . 533 . 544 . 555 . 56 Input Voltage (V) SW R_on (Ω) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) SW R_on (Ω) Feedback Voltage vs . Input Voltage Feedback Voltage vs . Temperature Frequency vs. Input Voltage Frequency vs. Temperature SW R_on vs. TemperatureSW R_on vs. Input Voltage

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 600 650 700 750 800 850 900 950 1000 22 . 533 . 544 . 555 . 56 Input Voltage (V) Current Limit (mA) 600 650 700 750 800 850 900 950 1000 -40 -20 0 20 40 60 80 100 Temperature (°C) Current Limit (mA) Current Limit vs. Input Voltage Current Limit vs. Temperature Stability Waveform Stability Waveform Stability Waveform Stability Waveform

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) 100 0.1 1 10 100 1000 Load Current (mA) Efficiency (%) VIN=2.5V VIN=5.0V 100 0.1 1 10 100 1000 Load Current (mA) Efficiency (%) VOUT=20VVOUT=7.5V VIN=3.6V VIN=3.0V VIN=3.6V VIN=5.0V Stability Waveform Stability Waveform Load Transient Load Transient Efficiency vs. Load Current Efficiency vs. Load Current

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Recommended Minimum Footprint SOT-23-6/TSOT-23-6 SOT-23-6/TSOT-23-6

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global 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 G5105 SHDN FB COMP VIN ON OFF SW GND VOUT R1R4R3 RC CC VBIAS VDIM PWM Dimming White LED Driver (Optional)C2 D1L1 VCC G5105 SHDN FB COMP VIN ON OFF SW GND VOUT R1R4R3 RC CC VBIAS VDIM PWM Dimming

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc. Function Description Normal Operation The G5105 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 turns off to stop power input

Application Information

A 4.7 µH or 10 µH inductor is recommended for small ripple applications. Small form factor and high effi- ciency are the major concerns for most G5105 applica- tions. Inductor with low core losses and small DCR (cooper wire resistance) at 1MHz are good choice for G5105 applications. Capacitor Selection The small size of ceramic capacitors makes them suit- able for G5105 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 10 µF or 22 µF capacitor for input and output are recommended for most appli- cations. Smaller input/output capacitor enlarges the input/output ripple. Diode Selection Schottky diodes, with their low forward voltage drop and fast reverse recovery, are the ideal choices for G5105 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 di- ode capacitance, which can cause significant switching losses at the 1MHz switching frequency of the G5105. A Schottky diode rated at 1A is sufficient for most G5105 applications.

Ver: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global Mixed-mode Technology Inc.

Package Information

SOT-23-6 (TB) Package Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ±0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. 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: 0.6 Preliminary May 10, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw G5105Global 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 mismatch 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