G5115 GMT | Alldatasheet
Document overview
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Technical content
Features
Driving Up to 4 LEDs Auto Trigger/Release OVP Function (G5115/G5119) Input Voltage Range: 1.7V ~ 6.5V Precise Dimming Control Using PWM Signal 50µA No Switching Current Internal 18V Switch With 0.8Ω Rds(on) Soft Start Function Included Up to 85% Efficiency
Applications
White LED Backlight Display for PDA Pocket PC Smart Phones Handheld Devices Cellular Phones General Description The G5115/G5117/G5119 are high efficiency boost converters with constant current output that drives up to 4 white LEDs. The continuous LED current is set with the FB pin regulated voltage across an external sense resistor (Rs) connected from that pin to ground. A dim- ming PWM waveform to SHDN pin controls LED av- erage current proportional to its duty makes the bright- ness of LEDs also proportional to the duty. Low FB regulation voltage and low switch turned on resistance result in high converting efficiency from wide battery voltage range to high LED series voltage. An over-voltage protection prevents device damage while LEDs is open. It is easy to release protection state by just put the load path closed.
Ordering Information
(Pb free) MARKING TEMP. RANGE PACKAGE G5115T1U G5115T1Uf 5115X -40°C ~ +85°C SOT-23-5 G5117T1U G5117T1Uf 5117X -40°C ~ +85°C SOT-23-5 G5119P8U G5119P8Uf G5119 -40°C ~ +85°C MSOP-8L Note:T1 : SOT-23-5 P8 : MSOP-8L U : Tape & Ree l Pin Configuration Typical Application Circuit VCC OVP SOT-23-5 G5115 1SW GND FB VCC SHDN SOT-23-5 G5117 1SW GND FB SW MSOP-8 G5119 1VCC PGND N.C.
7 AGND
1µF/ 25V VIN 2.7V to 4.2V VOUT OVPC1
4 LEDs
4.7µF/ 6.3V VCC OVP SOT-23-5 G5115 1SW GND FB VCC SHDN SOT-23-5 G5117 1SW GND FB SW MSOP-8 G5119 1VCC PGND N.C. 1µF/ 25V VIN 2.7V to 4.2V VOUT OVPC1 4.7µF/ 6.3V
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc. Absolute Maximum Ratings Operating Temperature…….……………..-40°C to 85°C 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, unless specified) PARAMETER CONDITION MIN TYP MAX UNIT Input Voltage Range 1.7 --- 6.5 V G5115/G5119, Trigger 15 16 17 V OV Protection Threshold G5115/G5119, Release --- --- 14 V OV Pin Input Current G5115/G5119, V ovp = 16V --- 10 15 µA VFB = 0.3V --- 50 100 µA Quiescent Current V SHDN = 0V --- 2.4 3 µA FB Comparator Trip Point 242 250 258 mV Switch Off Time V FB = 0V --- 400 --- ns Switch RDS(ON) I SW = 150mA --- 0.8 1.2 Ω Switch Leakage Current Switch Off, V SW = 18V --- 0.1 5 µA Switch Current Limit 200 250 300 mA SHDN Pin Voltage High 0.9 --- --- V SHDN Pin Voltage Low --- --- 0.25 V Note.1:The G5115/G5117/G5119 are guaranteed to meet performance specifications from 0°C~85°C. Specifications over the -40°C~85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Block Diagram VREF BIAS SHUTDOWN LOGIC SW SHDNVCC FB ERROR COMP 0.25V en_sw GND PUMP CONTROL OC COMP DRIVER TOFF PULSE CONTROL VOUTVIN CTRL * OVP** LED Series VOUT * SHDN pin only availiable for G5117/G5119 ** OVP pin only availiable for G5115/G5119 VREF BIAS SHUTDOWN LOGIC SW SHDNVCC FB ERROR COMP 0.25V en_sw GND PUMP CONTROL OC COMP DRIVER TOFF PULSE CONTROL VOUTVIN CTRL * OVP** LED Series VOUT * SHDN pin only availiable for G5117/G5119 ** OVP pin only availiable for G5115/G5119
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC = +3.6V, V SHDN = +3.6V, L=10µH, TA=25°C, unless otherwise noted) 0.25 0.5 0.75 1.25 1.5 Input Voltage (V) SW RDS_on (Ω) 0.25 0.5 0.75 1.25 1.5 - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature (°C) SW RDS_on (Ω) 100 150 200 250 300 Input Voltage (V) Current Limit (mA) 100 200 300 400 -40 -20 0 20 40 60 80 100 Temperature (°C) Current Limit (mA) Input Voltage (V) Efficiency (%) IO=20mA 4LEDs, CO=1µF 0 5 10 15 20 25 Load Current (mA) Efficiency (%) Efficiency vs. Output Current Efficiency vs. Input Current VIN=4.2V VIN-3.6VVIN=2.7V 4LEDs, CO=1µF SW RDS_on vs. Input Voltage SW RDS_on vs. Temperature Current Limit vs. Input Voltage Current Limit vs. Temperature
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) Input Voltage (V) OVP Trigger Threshold (V) -40 -20 0 20 40 60 80 100 Temperature (°C) OVP Trigger Threshold (V) 11.5 12.5 13.5 Input Voltage (V) OVP Release Threshold (V) -40 -20 0 20 40 60 80 100 Temperature (°C) OVP Release Threshold (V) Input Voltage (V) LED Current (mA) CO=0.1µF 4LEDs 0 1 02 03 04 05 06 07 08 09 0 1 0 0 Duty Cycle (%) LED Current (mA) 4LEDs CO=0.1µF CO=1µF CO=1µF OVP Trigger Threshold vs. Input Voltage OVP Trigger Threshold vs. Temperature OVP Release Threshold vs. Input Voltage OVP Release Threshold vs. Temperature LED Current vs. Input Voltage LED Current vs. Duty Cycle
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) PWM Dimming OVP Waveform G5119 Inrush Current Waveform
G5115/G5117/G5119Global Mixed-mode Technology Inc. 4 4 OVP Over Voltage Protection Sense Pin. by controlling the inrush current. determined by sense resistor Rs. other important inductor parameter is the DC resistance. Table 1. Recommended Inductors
G5115/G5117/G5119Global Mixed-mode Technology Inc. Table 2. Recommended Output Capacitors cient for most applications. Table 3. Recommended Input Capacitors speed, are best match for the G5115/G5117/G5119. Table 4. Recommended Diodes work should be routed away from the inductor.
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc.
Package Information
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 DIMENSIONS IN MILLIMETER SYMBOL MIN NOM MAX A 1.00 1.10 1.30 A1 0.00 ----- 0.10 A2 0.70 0.80 0.90 b 0.35 0.40 0.50 C 0.10 0.15 0.25 D 2.70 2.90 3.10 E 1.40 1.60 1.80 H 2.60 2.80 3.00 θ1 1º 5º 9º E e D H L C b A E e D H L C b A
Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5115/G5117/G5119Global Mixed-mode Technology Inc. Note: 1. Package body sizes exclude mold flash and gate burrs 2. Dimension L is measured in gage plane 3. Tolerance 0.10mm unless otherwise specified 4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact. 5. Followed from JEDEC MO-137 DIMENSION IN MM DIMENSION IN INCH SYMBOL MIN NOM MAX MIN NOM MAX Taping Specification PACKAGE Q’TY/REEL SOT-23-5 3,000 ea MSOP-8 2,500 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 E1 E 12° (4X) A2 A e b y C L θ D E1 E 12° (4X) A2 A e b y C L θ Feed Direction Typical MSOP Package Orientation Feed Direction Feed Direction Typical MSOP Package Orientation Feed Direction