Product is End of Life 3/2014 SiP12501 Vishay Siliconix Boost Converter for Single/Double AA Cell or NiMH Battery for White LED Applications DESCRIPTION FEATURES SiP12501 is a boost converter IC for single or double cell NiMH or Alkaline battery pack, which can drive white LEDs connected in parallel to provide backlight in hand-held devices. Designed with an internal low threshold power MOSFET, it is capable of starting up with a low battery voltage of 0.65 V. For best efficiency performance, the SiP12501 is designed to operate in PWM mode with 600 kHz switching. The voltage-mode PWM design is internally compensated, reducing the external parts count. It accepts input voltages from 0.65 V to 3.3 V, regulates output current of up to 60 mA from a 0.9 V input. The LED current can be adjusted externally for its brightness control. SiP12501 features low shutdown current of under 1 µA, internal power MOS, thermal shutdown protection and antiringing control. • Voltage mode control with internal frequency compensation • 0.65 V to 3.3 V input voltage range • Low startup voltage: 0.65 V • PWM control with 600 kHz fixed switching frequency • Analog control of LED intensity • Power supply from output voltage • Regulated output current • Integrated UVLO and soft-start • Logic controlled shutdown (< 1 µA) • High efficiency: typical 75 % • Internal power MOS • Antiringing switch to minimize EMI • Thermal shutdown • Minimum external components • PowerPAK® MLP33-6 package SiP12501 is available in a lead (Pb)-free 6 pin, PowerPAK MLP33 package and is specified to operate over the industrial temperature range of - 40 °C to 85 °C. APPLICATIONS • • • • • White LED backlighting Handheld devices Digital cameras Portable applications LCD bias supplies TYPICAL APPLICATION CIRCUIT VIN 10 µH 2 10 µF VIN XSHD 1 MBR0520 XSHD LX 6 4.7 µF SiP12501 5 GND FB 4 VOUT 3 Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 15 Ω 15 Ω 15 Ω 15 Ω www.vishay.com 1 Product is End of Life 3/2014 SiP12501 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS (all voltages referenced to GND = 0 V) Parameter Limit Input Voltage, VIN Unit - 0.3 to 6 - 0.3 to VOUT + 0.5 LX Voltage Output Voltage, VOUT V - 0.3 to 6 - 0.3 to VIN + 0.5 XSHD Voltage FB Voltage - 0.3 to 6 Maximum Junction Temperature 150 Storage Temperature - 55 to 150 Operating Junction Temperature °C 125 Power Dissipationa PowerPAK MLP33-6 (TA = 70 °C)a PowerPAK MLP33-6 Thermal Resistanceb 1100 mW 50 °C/W Notes: a. Derate 20 mW/°C above 70 °C. b. Device mounted with all leads soldered or welded to PC board. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING RANGE (all voltages referenced to GND = 0 V) Parameter Limit Input Voltage, VIN Unit 0.65 to 3.3 Output Voltage, VOUT 3.5 to 5 XSHD Voltage 0 to VIN V 0 to VOUT + 0.5 V LX Voltage FB Voltage 0 to 5 Operating Temperature Range - 40 to 85 °C SPECIFICATIONSa Parameter Symbol Test Conditions Unless Specified VIN = 1.2 V, VOUT = 3.9 V, TA = 25 °C Minimum Start-Up Voltage VSTART ILOAD = 1 mA Minimum Operating Voltaged VHOLD XSHD = VIN Feedback Voltage VFB Feedback Input Current IFB Maximum PWM Duty Cycle MAXDTY PWM Switching Frequency fOSC Limits Typ.c Max.b Full 0.65 0.85 Full 0.55 Temp. Full IQ VFB = 0.4 V Full ISTB XSHD = 0 V, not including switch leakage Full LX = 5 V RDS(on) VOUT = 3.3 V 0.8 V ≤ VIN ≤ 0.9 V XSHD Input High Level XSHD Input Low Level VXSHDH VXSHDL 0.309 V nA 80 87 425 600 775 % 200 300 1 1 2 Full kHz µA 10 Ω 0.24 Full Unit 0.318 1 Full ILEAK 0.3 0.282 VFB = 0.3 V Quiescent Current NMOS Switch On Resistance Min. b 0.291 Stand-By Current NMOS Switch Leakage a 0.55 0.9 V< VIN ≤ 2 V Full 0.8 2 V < VIN ≤ 5 V Full 1.2 V Full 0.2 Thermal Shutdown TSHD 160 Thermal Shutdown Hysteresis THYST 20 °C Notes: a. Full = - 40 °C to 85 °C. b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum (- 40 °C to 85 °C). c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. d. Minimum Operating Voltage is determined by the battery’s capability to provide energy as it is deeply discharged. www.vishay.com 2 Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 Product is End of Life 3/2014 SiP12501 Vishay Siliconix PIN CONFIGURATION AND TRUTH TABLE PowerPAK MLP33-6 XSHD 1 6 LX VIN 2 5 GND VOUT 3 4 FB Top View ORDERING INFORMATION Part Number Temperature Range Marking SiP12501DMP-T1-E3 - 40 °C to 85 °C 2501 PIN DESCRIPTION Pin Number Name 1 XSDH 2 VIN 3 VOUT 4 FB 5 GND 6 LX Function Logic controlled shutdown input, XSHD = high: normal operation, XSHD = low: shutdown Battery input voltage Output of the boost converter and power source for the IC Feedback pin Signal and power ground Switch pin PIN FUNCTIONS XSHD (Pin 1) FB (Pin 4) XSHD is the logic controlled shutdown input pin. When XSHD is low, the IC is shutdown and an antiringing switch is connected between LX and VIN. When XSHD is high, the IC is working in normal operation. FB is the feedback voltage pin, it senses the LED current through the ballast resistor, the difference between it and the internal 0.3 V reference is amplified by the error amplifier. GND (Pin 5) VIN (Pin 2) VIN is the pin connected to battery input voltage. The IC gets its start-up bias from VIN at the beginning. Once VOUT exceeds VIN, bias will come from VOUT. Thus, once started, operation is completely independent from VIN. Operation is only limited by the output voltage level and the battery’s internal series resistance. GND is the pin for signal and power ground. LX (Pin 6) LX is the pin of the drain for internal power MOS. LX is also connected to inductor and Schottky diode. If the inductor current falls to zero, or XSHD is low, an internal antiringing switch is connected from LX to VIN to minimize EMI. VOUT (Pin 3) VOUT is the output of the boost converter and also the power source for the IC. Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 www.vishay.com 3 Product is End of Life 3/2014 SiP12501 Vishay Siliconix FUNCTIONAL BLOCK DIAGRAM VOUT VIN GND Thermal Shutdown Compensation Antiringing SW Start-Up LX FB E/A + + PWM - Reference and Soft-Start XSHD Driver Oscillator DETAILED OPERATION SiP12501 is a 600 kHz boost converter IC, packaged in 6 pin MLP33, for white LED applications. With start-up from low battery input voltage of 0.65 V, this device features fixed frequency voltage mode PWM control with internal frequency compensation. With its low rDS(on) internal power MOSFET, this device maintains high efficiency over a wide range of load current. Low Voltage Start-Up SiP12501 is designed to start-up at input voltage of typically 0.65 V. In the beginning, VOUT is lower than VIN because of the voltage drop of the Schottky diode, the device uses VIN as the power source for the start-up circuit and uses current limit with fixed off-time to control the increase of the output voltage. Once VOUT exceeds VIN, the device uses VOUT as the power source. When VOUT exceeds 1.89 V, the device switches to soft-start. Soft-Start During soft-start, the loop compensation guarantees the slow increase of the output voltage and inrush current, so that no large voltage overshoot and inrush current occur when the soft-start is ended. PWM operation After soft-start, the device works in PWM operation with a fixed frequency of 600 kHz. VIN 10 µF 1 Antiringing Control The antiringing control circuitry prevents high frequency ringing of the LX pin as the inductor current goes to zero by damping the resonant circuit formed by L and CLX (capacitance on LX pin). When the IC is shutdown, this antiringing switch is also turned on. APPLICATION INFORMATION White LED Brightness Control The current of white LED can be adjusted by a PWM signal on XSHD or by a variable dc voltage to control its brightness. (see Figure 1.) As control voltage VCTRL increases, the voltage drop on R2 increases and the voltage drop on R1 decreases. Thus, the LED current decreases. The selection of R2 and R3 will make the current from VCTRL much smaller than LED current and much larger than the FB pin bias current. 10 µH 2 VIN XSHD Thermal Shutdown Protection If the temperature of the device is above 160 °C, the device will turn off the internal power MOSFET and wait until the temperature drops below 140 °C, then the device goes into the soft-start process again and finally the system recovers. During thermal shutdown, the output voltage drops below 1.89 V minus UVLO hysteresis, start-up will be triggered to keep the output voltage above 1.89 V. LX 6 XSHD ILED 0.3 V 15 Ω 0.3 - V CTRL 15 Ω R2 R3 MBR0520 4.7 µF SiP12501 5 R2 1 kΩ FB 4 XSHD VOUT 3 R3 3.9 kΩ R1 15 Ω 15 Ω 15 Ω 15 Ω VCTRL www.vishay.com 4 Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 Product is End of Life 3/2014 SiP12501 Vishay Siliconix 90 0.160 89 0.158 88 0.156 Supply Curremt (mA) % Duty Cycle TYPICAL CHARACTERISTICS 87 86 85 84 0.154 0.152 0.150 0.148 83 0.146 82 0.144 81 0.142 80 - 50 - 30 - 10 10 30 50 70 0.140 - 50 90 - 30 - 10 10 50 70 90 70 90 Temperature (°C) Temperature (°C) Maximum PWM Duty Cycle vs. Temperature Supply Current vs. Temperature 4 1.2 VIN = 5 V 3 Shutdown Threshold (V) 1.0 Feedback Voltage Accuracy (%) 30 2 1 VOUT = 3.9 V 0 -1 0.8 VIN = 2 V 0.6 VIN = 0.8 V 0.4 -2 0.2 -3 -4 - 50 - 30 - 10 10 30 50 70 Temperature (°C) Feedback Voltage vs. Temperature Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 90 0.0 - 50 - 30 - 10 10 30 50 Temperature (°C) Shutdown Threshold vs. Temperature www.vishay.com 5 Product is End of Life 3/2014 SiP12501 Vishay Siliconix TYPICAL WAVEFORMS VXSHD 0.5 V/div VIN 0.5 V/div VOUT 1 V/div VFB 0.2 V/div VIN = 0.8 V 1 ms/div VOUT 2 V/div 100 ms/div Four LEDs in series Figure 3. Startup VIN = VXSHD = 0 V to 0.8 V Figure 2. PWM Dimming Control 200 Hz 50 % Duty Cycle PWM Signal on XSHD Pin VLX 2 V/div VOUT 50 mV/div ac coupled VFB 20 mV/div ac coupled 0.5 µs/div Figure 4. Switching Waveforms: VLX, VOUT and VFB VIN = 0.8 V, L = 10 µH, COUT = 4.7 µF, Four LEDs in Parallel Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see www.vishay.com/ppg?73192. www.vishay.com 6 Document Number: 73192 S09-1455-Rev. B, 03-Aug-09 Package Information Vishay Siliconix PowerPAKr MLP33-6, 8 and 10 (POWER IC ONLY) 4xQ // ccc A NX 8 Detail D TopView C A2 A1 A3 0.08 C Side View Detail C NX b bbb M C A A e 1 ÉÉÉ ÇÇ ÉÉÉ ÇÇ ÉÉÉ Detail C A1 Seating Plane C 5 ddd M C 2 Exposed Pad (Optional) L 7 R2 R 11 D E2 L2 E2/2 Detail D A B NxK See Detail A 7 N 8 N-1 6 See Detail B D2/2 (ND-1) x Pin 1 Mark 4 e 9 D2 aaa C 9 Bottom View 2X 2X Datum A or B ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ aaa C 1 E L2 Datum A or B NX R1 NX R1 L e/2 e Even pin/Side L2 pin Tip e pin Tip 5 Odd pin/Side 5 Detail B 0.17 min L1 Exposed Slug/Heat Sink L2 This Feature Applies To Both Ends of The Package 0.17 0.30 B Exposed Metalized Feature Detail A Document Number: 72820 28-Jan-04 10 Edge of Plastic Body www.vishay.com 1 Package Information Vishay Siliconix PowerPAKr MLP33-6, 8, 10 N = 6 PITCH: 0.95 mm N = 8 PITCH: 0.65 mm N = 10 PITCH: 0.50 mm MILLIMETERS* Dim A A1 A2 A3 aaa b-6 b-8 b-10 bbb ccc D D2 ddd E E2 e-6 e-8 e-10 K L L1-6 L1-8 L1-10 L2 R Ref R1 Ref-6 R1 Ref-8 R1 Ref-10 Q INCHES Basic Min Nom Max Basic Min Nom Max Notes − 0.80 0.90 1.00 − 0.031 0.035 0.039 1, 2 − 0.00 0.025 0.05 − 0.000 0.001 0.002 1, 2 − 0.65 0.70 0.75 − 0.026 0.028 0.030 1, 2 − 0.15 0.20 0.25 − 0.006 0.008 0.010 1, 2 − − 0.10 − − − 0.004 − 1, 2 − 0.33 0.35 0.43 − 0.013 0.014 0.017 1, 2, 8 − 0.285 0.305 0.385 − 0.011 0.012 0.015 1, 2, 8 − 0.18 0.20 0.28 − 0.007 0.008 0.011 1, 2, 8 − − 0.10 − − − 0.004 − 1, 2 − − 0.10 − − − 0.004 − 1, 2 3.00 − − − 0.118 − − − 1, 2, 8 − 1.92 2.02 2.12 − 0.076 0.080 0.083 1, 2, 8 − − 0.05 − − 3.00 − − − 0.118 − − − 1, 2, 8 − 1.10 1.20 1.30 − 0.043 0.047 0.051 1, 2, 8 − − 0.95 − − − 0.037 − 1, 2 − − 0.65 − − − 0.026 − 1, 2 − − 0.50 − − − 0.020 − 1, 2 − 0.20 − − − 0.008 − − 5, 11 − 0.20 0.29 0.45 − 0.008 0.011 0.018 1, 2, 8 − 0.16 0.24 0.40 − 0.006 0.009 0.016 1, 2, 8 − 0.16 0.24 0.40 − 0.006 0.009 0.016 1, 2, 8 − − − − − − − − 1, 2, 8 − − − 0.125 − − − 0.005 5, 11 − − 0.15 − − − 0.006 − 1, 2, 8 − − 0.127 − − − 0.005 − 1, 2, 8 − − 0.15 − − − 0.006 − 1, 2, 8 − − 0.075 − − − 0.003 − 1, 2, 8 − 0_ 10_ 12_ − 0_ 10_ 12_ 1, 2 0.002 1, 2 * Use millimeters as the primary measurement. ECN: S-40082—Rev. A, 02-Feb-04 DWG: 5925 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. All angels are in degrees. 3. N is the total number of pins. 4. The pin #1 identifier and pin numbering convention shall conform to JESD 95-1 SPP-012. Details of pin #1 identifier is located within the zone indicated. The pin #1 identifier is marked. 5. Dimension b applies to metallized pin and is measured between 0.15 mm and 0.20 mm from the pin tip. 6. ND refers to the maximum number of pins on the D side. 7. Depopulation of pins is allowed and will be called out on the individual variation. 8. Coplanarity applies to the exposed heat sink slug as well as the pins. 9. Profile tolerance (aaa) will be applicable only to the plastic body and not to the metallized features (such as the pin tips and tie bars.) Metallized features may protrude a maximum of L2 from the plastic body profile. 10. L1 max is not called out, the metallized feature will extend to the exposed pad. Thus, the 0.17-mm gap does not apply. 11. The corner will be sharp unless otherwise specified with radius dimensions. www.vishay.com 2 Document Number: 72820 28-Jan-04 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21 conform to JEDEC JS709A standards. Revision: 02-Oct-12 1 Document Number: 91000