SC600 TM mAhXLife LED Driver with 5.0V, 4.5V, or 4.0V Output POWER MANAGEMENT Description FFeatureseatures The SC600 is a versatile charge pump designed for use Small size - MLPD 10 lead 3x3mm or MSOP-10 in battery operated power supply applications. The wide package allows for a complete solution in .05 sq. in. input range is matched for Li-Ion battery applications. Peak ef ciency over 90% (extends battery life) TM mAhxLife LED Drivers feature a fractional charge pump Four component versions available implementation with ef ciency comparable to a switching 60mA versions available in 5.0V and 4.5V output regulator without costly inductors. Only two tiny ceramic 120mA versions available in 4.5V and 4.0V output capacitors are required, and the inductorless implemen- Short-circuit and over-temperature protection tation provides a reduced-EMI solution. Patented low Soft-start function noise mode switching circuitry and constant output cur- Shutdown current <1A rent allow the use of extremely small input and output Selectable xed frequencies of 8kHz, 32kHz, capacitors. 262kHz and 650kHz Low input and output ripple The SC600 charge pump can be used for applications Regulated to 5% that require up to 120mA of output current with a 4.0V Ease of use or 4.5V output. The 5.0V output version provides up to 60mA of output current. Applications Cellular phones TM mAhXLife LED drivers replace switched mode power LED backlighting supplies and provide comparable ef ciency with less cost, PDA power supplies area, noise, and complexity. Portable electronics Typical Ef ciency Electronic books Handheld computers 100 90% of Li-Ion Wireless web appliances Battery Life 90 SC600A 80 5.0V 60mA 70 60 Device with Only 2x Mode 5.0V 60mA 50 4.2 4.0 3.8 3.6 3.4 3.2 3.0 Input Voltage V Typical Application Circuit U1 1 3 2.7V to 6.5V VIN VOUT 4.0V, 4.5V or 5.0V 2 Cin CF1+ Cout 1.0uF 6 0.33uF Cbucket1 EN 1.0uF 9 CF1- UP TO 6 LEDS 4 CD4 10 CF2+ Cbucket2 5 1.0uF CX8 7 CF2- GND 8 January 9, 2006 1 www.semtech.com Efficiency % SC600SC600 POWER MANAGEMENT (1) Absolute Maximum Ratings Absolute Maximum Ratings Exceeding the speci cations below may result in permanent damage to the device or device malfunction. Operation outside of the parameters speci ed in the Electrical Characteristics section is not implied. Parameter Symbol Maximum Units Supply Voltage V -0.3 to +7.0 V IN Output Voltage V -0.3 to +7.0 V OUT V Short Circuit Duration sc Inde nite s OUT (2) Thermal Resistance, Junction to Ambient 49 (MLPD), 216 (MSOP) C/W JA Operating Ambient Temperature Range T -40 to +85 C A Junction Temperature Range T -40 to +150 C J Storage Temperature Range T -65 to +150 C STG Lead Temperature SC600 IMSTRT T 260 C LEAD Lead Temperature SC600 IMSTR T 240 C LEAD IR Re ow Temperature SC600 IMLTRT T 260 C LEAD IR Re ow Temperature SC600 IMLTR T 240 C LEAD Notes: 1) This device is ESD sensitive. Use of standard ESD handling precautions is required. 2) Calculated from package in still air, mounted to 3x 4.5, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. Electrical Characteristics (1) Unless otherwise speci ed: T = -40C to +85C, C = C = 1.0F (ESR = 0.1), C 1.0F (ESR = 0.1), V = 2.85V to 5.5V . A IN BUCKET OUT IN Parameter Symbol Conditions Min Typ Max Units Input Supply Voltage V 2.5 6.5 V IN Freq. = 8kHz, I = 0mA, V = 3.7V 230 380 OUT IN Freq. = 32kHz, I = 0mA, V = 3.7V 280 470 A OUT IN Quiescent Current I Freq. = 262kHz, I = 0mA, V = 3.7V 800 1200 Q OUT IN Freq. = 650kHz, I = 0mA, V = 3.7V 1.6 2.5 mA OUT IN Enable = 0 1 A Version A, Static Load Regulation 4.75 5.0 5.25 (2) Freq. = 262kHz or 650kHz , I = 0 to 60mA OUT Version B, Static Load Regulation 4.275 4.5 4.725 (2) Freq. = 262kHz or 650kHz , I = 0 to 120mA OUT Output Voltage V V OUT Version C, Static Load Regulation 4.275 4.5 4.725 (2) Freq. = 262kHz or 650kHz , I = 0 to 60mA OUT Version D, Static Load Regulation 3.8 4.0 4.2 (2) Freq. = 262kHz or 650kHz , I = 0 to 120mA OUT 2006 Semtech Corp. 2 www.semtech.com