G5910 Global Mixed-mode Technology Inc. High-Efficiency White LED Charge Pump Features General Description The G5910 Charge-Pump is a switched-capacitor voltage converter that delivers a regulated output. The external inductor is not required for operation. Using small capacitors, the G5910 can deliver up to 90mA (@VIN=3V) to the voltage-regulated output. The G5910 features high efficiency over a large portion of its load range making this device ideal for battery-powered applications. The combination of few external components and small package size keeps the total converter board area to a minimum in space-restricted applications. The G5910 contains a thermal management circuit to protect the device under continuous output short circuit conditions. Input Range：2.7V to 5V Quiescent Current: 90µA Regulated 5V ±4% output 5V Output Current 90mA with VIN ≧ 3.0V 40mA with VIN ≧ 2.7V High Frequency 1MHz operation Shutdown mode draws less than 1µA Shot-circuit/over-temperature protection SOT-23-6 and TSOT-23-6 package Applications Portable Communication Devices Cellular Phones PDA Handheld Electronics Digital Cameras LED/Display Back Light Driver LED for Camera Flash The G5910 is available in a surface mount SOT-23-6 and TSOT-23-6 package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G5910-45TBU 5911x -40°C to 85°C SOT-23-6 G5910-50TBU 5910x -40°C to 85°C SOT-23-6 G5910-45TPU G5910-50TPU 5911x 5910x -40°C to 85°C -40°C to 85°C TSOT-23-6 TSOT-23-6 Note: TB : SOT-23-6 TP:TSOT-23-6 U: Tape & Reel Pin Configuration Typical Application Circuit VOUT G5910 VOUT 1 GND 2 COUT 10µF 6 C+ 3 5 VIN 4 GND C+ VIN CFLY 1µF G5910 ON/OFF SHDN VOUT SHDN VIN CIN 10µF C- CCIN, COUT: TAIYO YUDEN, JMK212BJ106KG CFLY: TAIYO YUDEN,EMK212JB105KG SOT -23-6、TSOT-23-6 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 1 G5910 Global Mixed-mode Technology Inc. Absolute Maximum Ratings VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V VOUT to GND. . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V SHDN to GND . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V CP- to GND . . . . . . . . . . . . . . . . . . . .-0.3V to VIN+0.3V Output to GND Short-Circuit Duration………Indefinites Operating Temperature Range . . . . . .. .-40°C to 85°C Junction Temperature. . . . . . . . . . . . . . . . . . . . .150°C ESD Rating1 HBM . . . . . . . . . . . . . . . . . . . . . . .2000V Reflow Temperature (soldering, 10sec) . . . . . . .260°C Note 1：Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Electrical Characteristics VCC=V SHDN = 3V, TA=25°C, CFLY=1µF, CIN=10µF, COUT=10µF, unless otherwise noted. DESCRIPTION Input Voltage No Switching supply Current Output Voltage Shutdown Supply Current Ripple Voltage SYMBOL VIN IQ VOUT ISHDN VRIPPLE Efficiency η Frequency FOSC CONDITION VOUT=5.0V 2.7V＜VIN＜5V, IOUT=0mA, SHDN=VIN,VOUT=5.5V 2.7V＜VIN＜5V, IOUT ≤ 40mA G5910-50 3.0V＜VIN＜5V, IOUT≤ 90mA 2.7V＜VIN＜5V, IOUT≤ 50mA G5910-45 3.0V＜VIN＜5V, IOUT≤ 100mA MIN TYP MAX UNIT 2.7 --- VOUT V --- 90 140 µA 4.8 5 5.2 4.32 4.5 4.68 V 2.7V＜VIN＜5V, IOUT=0mA, V SHDN = 0 --- --- 1 VIN = 3V, IOUT = 50mA --- 25 --- VIN = 3V, IOUT = 90mA VIN = 2.7V, IOUT = 40mA VIN = 3V, IOUT = 90mA --- 20 --- ----- 88 80 ----- % Oscillator Free Running µA mVP-P 0.7 1 1.3 MHz SHDN Input Threshold High VIH 1.4 --- --- V SHDN Input Threshold Low VIL --- --- 0.3 V VOUT Turn-on time tON VIN = 3V, IOUT = 0mA --- 0.22 --- ms Short-circuit current ISC VIN = 3V, VOUT = GND, SHDN = 3V --- 340 --- mA Thermal Shutdown Temperature Thermal Shutdown Hysteresis TSD ----- 150 30 ----- °C °C TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 2 Global Mixed-mode Technology Inc. G5910 Typical Performance Characteristics (VIN=3V, CIN=COUT=10µF, CFLY=1µF, TA=25°C, unless otherwise noted.) Startup Time with 50mA Load Startup Time with 90mA Load Output Ripple with IOUT=50mA Output Ripple with IOUT=90mA Load Transient for 50mA Load Transient for 90mA TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 3 G5910 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Output Voltage vs Supply Voltage 5.2 5.15 5.15 5.1 5.1 5.05 Output Voltage (V) Output Voltage (V) Output Voltage vs Output Current 5.2 VIN=3.6V 5 4.95 4.9 TA=100°C 5.05 5 4.95 TA=25°C TA=-40°C 4.9 VIN=2.7V VIN=3.0V 4.85 4.85 4.8 IOUT=20mA 4.8 0 10 20 30 40 50 60 70 80 90 2.5 3 Output Current (mA) Output Voltage vs Temperature 100 5.15 90 80 Supply Current (µA) Output Voltage (V) 5.1 5.05 5 4.95 4.9 5 TA=100°C 70 60 TA=25°C 50 TA=-40°C 40 30 IOUT=0µA VIN=VSHDN 20 VIN=3V IOUT=50mA 10 0 4.8 -40 -20 0 20 40 60 Temperature (°C) 80 2.5 100 90 90 80 80 Supply Current (µA) 100 70 60 50 40 IOUT=0µA VIN=VSHDN=3V 20 3.5 4 4.5 5 Supply Current vs SHDN Voltage 100 30 3 Supply Voltage (V) Supply Current vs Temperature Supply Current (µA) 4.5 Supply Current vs Supply Voltage 5.2 4.85 3.5 4 Supply Voltage (V) VIN=5V 70 60 VIN=3V VIN=4V 50 40 30 20 10 IOUT=0µA 10 0 0 -40 -20 0 20 40 60 80 100 0 1 2 3 4 5 SHDN Voltage (V) Temperature (°C) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 4 G5910 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Frequency vs. Temperature Frequency vs Supply Voltage 1200 1200 TA=100°C 1150 1150 1100 1050 Frequency (KHz) Frequency (KHz) 1100 TA=25°C 1000 950 900 850 TA=-40°C 1050 1000 950 900 850 800 800 750 750 700 700 2.5 3 3.5 4 4.5 5 -40 -20 0 VIH vs Supply Voltage 80 100 TA=-40°C 1.2 1 1 0.8 TA=100°C TA=25°C VIL (V) VIH (V) 60 1.4 TA=-40°C 1.2 0.6 0.8 TA=100°C TA=25°C 0.6 0.4 0.4 0.2 0.2 0 0 2.5 3 3.5 4 4.5 5 2.5 3 Supply Voltage (V) Efficiency vs Input Volatge 3.5 4 Supply Voltage (V) 100 25mA 85 4.5 5 Efficiency vs Load Current 90 VIN=2.7V 90 80 40mA VIN=3.0V 70 75 Efficiency (%) Efficiency (%) 40 VIL vs Supply Voltage 1.4 80 20 Temperature (°C) Supply Voltage (V) 90mA 70 65 60 VIN=3.6V 50 VIN=3.3V 40 30 60 20 55 10 50 2.5 3 3.5 4 Input Voltage (V) 4.5 0 0.01 5 0.1 1 10 Load Current (mA) 100 1000 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 5 Global Mixed-mode Technology Inc. G5910 Typical Performance Characteristics (continued) Output Voltage vs. Supply Voltage 6 IOUT =2mA Output Voltage (V) 5 4 3 2 1 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Supply Voltage (V) Recommended Minimum Footprint SOT-23-6、TSOT-23-6 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 6 Global Mixed-mode Technology Inc. G5910 Pin Descriptions PIN NAME 1 2 VOUT GND 3 SHDN 4 C- 5 6 VIN C+ FUNCTION Regulated output pin. Bypass this pin to ground with at least 6.8µF low ESR capacitor Ground connection Shutdown input. Active low signal disables the converter. Flying capacitor negative terminal Input supply pin. Bypass this pin to ground with at least 6.8µF low ESR capacitor Flying capacitor positive terminal enough to exceed the preset input threshold of the control comparator. When the output voltage exceeds the internal trip point voltage level, the switching cycle stops and the charge pump circuit is placed in an idle state. The closed loop feed back system containing the voltage sense circuit and control comparator allows the G5910 to provide a regulated output voltage and output load current. An integrated oscillator within the control circuit block creates the switching signal that drives the charge pump. The free running charge pump switching frequency is approximately 1MHz. The G5910 has complete output short circuit and thermal protection to safeguard the device under extreme operating conditions. When output voltage is short to ground, the switches S1, S4, and S3 are turned on with limited current of 220mA. After the short circuit condition has been released and output voltage rises above a threshold voltage, the G5910 will go into normal operation mode. An internal thermal protection circuit senses die temperature and will shut down the device if the internal junction temperature exceeds approximately 150°C. The charge pump will remain disabling until the fault condition is relieved. Detailed Description The G5910 uses a switched capacitor charge pump to boost an input voltage to a regulated output voltage. Through an internal resistor divider network the output regulation is achieved by sensing the charge pump output voltage. When the divided output drops below a preset trip point that controlled by an internal comparator a switched doubling circuit is enabled. The charge pump switch cycling enables four internal switches at two non-overlapping phases. During the first phase, switches S1 and S4 are switched on (short) and switch S2 and S3 are off (open). The flying capacitor CFLY is charged to a level approximately equal to input voltage VIN. On the second phase, switches S1 and S4 are turned off (open), S2 and S3 are turned on (short). During the first phase the low side of the flying capacitor CFLY is connected to GND. During the second phase, the flying capacitor CFLY is switched so that the low side is connected to VIN. The voltage at the high side of the flying capacitor CFLY is bootstrapped to 2 × VIN and is connected to output through a switch. For each cycle phase, charge from input node VIN is transported from a lower voltage to a higher voltage. This cycle repeats itself until the output node voltage is high TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 7 G5910 Global Mixed-mode Technology Inc. Block Diagram GND VIN S1 S4 SHDN Shutdown C+ COscillator S2 S3 Bandgap Bias VIN Control VOUT UV Layout Considerations High charge pump switching frequencies and large peak transient currents mandate careful printed circuit board layout. As a general rule for charge pump boost converters, all external capacitors should be located as close as possible to the device package with minimum length trace connections. Maximize the ground plane around the G5910 charge pump and make sure all external Topover layer capacitors are connected to the immediate ground plane. A local component side ground plane is recommended. If this is not possible due the layout design limitations, assure good ground connections by the use of large or multiple pcb via's. Refer to the following G5910 evaluation board for an example of good charge pump layout design. Top layer Bottom layer TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 8 G5910 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. Tolerance ±0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane SYMBOL MIN. DIMENSION IN MM NOM. MAX. MIN. DIMENSION IN INCH NOM. MAX. A 1.00 1.10 1.30 0.039 0.043 0.051 A1 A2 0.00 0.70 ----0.80 0.10 0.90 0.000 0.028 ----0.031 0.004 0.035 b C 0.35 0.10 0.40 0.15 0.50 0.25 0.014 0.004 0.016 0.006 0.020 0.010 D E e 2.70 1.40 ----- 2.90 1.60 1.90(TYP) 3.10 1.80 ----- 0.106 0.055 ----- 0.114 0.063 0.075(TYP) 0.122 0.071 ----- H L θ1 2.60 0.37 2.80 ------ 3.00 ----- 0.102 0.015 0.110 ----- 0.118 ----- 1° 5° 9° 1° 5° 9° TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.4 May 19, 2006 9 G5910 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: 1.4 May 19, 2006 10