SC4509SKTRT Semtech, SC4509SKTRT Datasheet
SC4509SKTRT
Specifications of SC4509SKTRT
Available stocks
Related parts for SC4509SKTRT
SC4509SKTRT Summary of contents
Page 1
... Packages are fully WEEE and RoHS compliant Applications Digital Video Cameras White LED Backlight Driver OLED Display Driver Portable Media Players GPS Receivers Cellular Phones PDAs and Handheld Computers L1 22μH U2 VIN 5 SC4509 EN/ 1μF 1 SC4509 Vo LED1 LED2 C2 0.22μF LED3 LED4 3 R1 www.semtech.com ...
Page 2
... Maximum Output Voltage Switch Saturation Voltage Maximum Duty Cycle Switch Current Limit Switch Leakage Current Shutdown Current PWM Dimming Frequency (1) EN/SS Threshold Low EN/SS Threshold High © 2007 Semtech Corp. Symbol V MLPD-W8 SOT23-6 = 0.22μ 22μH; unless otherwise noted, T OUT Symbol Conditions V ...
Page 3
... V = 3.6V 1μ EN/SS IN Parameter EN/SS Input Low Current EN/SS Input High Current Output Over-Voltage Protection Schottky Forward Drop Schottky Leakage Current Note: 1. Guaranteed by design. © 2007 Semtech Corp. = 0.22μ 22μH; unless otherwise noted, T OUT Symbol Conditions GND IL EN/ OVP V ...
Page 4
... Marking for SOT23, 6 Lead Package: yyww = Datecode (Example: 0652) © 2007 Semtech Corp. Ordering Information Part Numbers SW SC4509SKTRT VIN SC4509WLTRT EN/SS SC4509EVB Notes: (1) Only available in tape and reel packaging. A reel contains 3000 devices. (2) Lead-free package. This product is fully WEEE and RoHS compliant. ...
Page 5
... VIN N/A T © 2007 Semtech Corp. Function Cathode side of the Schottky output voltage. Connect a 0.22μF capacitor from this pin to ground. Ground connection Feedback input pin. Connect a resistor from this pin to GND to program the LED current. Enable pin. When connected to logic high, the converter is enabled. When con- nected to logic low, the converter is disabled ...
Page 6
... SC4509 ideal for battery-operated products. The SC4509 can be confi gured as a voltage regulated boost converter current-regulating boost converter for driving white LEDs. The device is designed to be stable without additional external components in both cases. © 2007 Semtech Corp. PWM ∑ ...
Page 7
... As a result, there will be a set error in the converter output voltage. This non-random error is caused by the feedback voltage divider ratio. It cannot be corrected by the feedback loop. © 2007 Semtech Corp. 7 SC4509 www.semtech.com ...
Page 8
... POWER MANAGEMENT Application Circuit for OLED Panels VIN EN/SS C1 1μF © 2007 Semtech Corp. L1 22μ VIN SC4509 4 EN/ SC4509 PRELIMINARY Vo OLED PANEL R1 C2 1μ www.semtech.com ...
Page 9
... I LED (mA) Feedback Voltage vs. Temperature vs. LED Current 16V OUT 203.0 202.0 ILED = 20mA 201.0 ILED = 30mA 200.0 199.0 198.0 197.0 -40 - Temperature (Deg. C) © 2007 Semtech Corp. 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35% 30 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35 1.20 1 ...
Page 10
... Switch Current Limit vs. Complementary Duty Cycle (1-D) vs. Temperature 800 -40°C 700 600 500 0°C 400 25°C 300 200 100 (1-D) (%) © 2007 Semtech Corp. Output Voltage vs. EN/SS Voltage vs. Temperature, 16.0 14.0 12.0 10.0 8.0 6.0 85°C 4.0 2.0 0.0 1.4 1.6 1.8 2.0 2 ...
Page 11
... VIN (V) Switching Waveform V = 3.6V 20mA LED OUT © 2007 Semtech Corp. = 16V, (4 LED) OUT ILED = 30mA 4.3 4.5 4.7 4.9 5.1 5.3 = 16V (4 LEDs) 11 SC4509 Startup Current V = 3.6V 30mA 16V (4 LEDs) ...
Page 12
... POWER MANAGEMENT Layout Example © 2007 Semtech Corp. Top Layer Bottom Layer 12 SC4509 PRELIMINARY www.semtech.com ...
Page 13
... CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Land Pattern - SOT23-6 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. © 2007 Semtech Corp. DIM E ...
Page 14
... POWER MANAGEMENT Outline Drawing - MLPD-W8 2x2 PIN 1 INDICATOR (LASER MARK) aaa C E/2 NOTES Land Pattern - MLPD-W8 2x2 © 2007 Semtech Corp DIM .059 .063 .067 1.50 1.60 1. .031 .035 .039 0.80 0.90 1. SEATING L PLANE N aaa bbb LxN E1 N bxN e bbb e/2 D/2 CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES) ...
Page 15
... POWER MANAGEMENT Contact Information Phone: (805) 498-2111 Fax: (805) 498-3804 © 2007 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 www.semtech.com 15 SC4509 www.semtech.com ...