KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter DESCRIPTION FEATURES The kB3310 is a MicroPower switched capacitor voltage converter that delivers a regulated output. No external inductor is required for operation. The kB3310 can deliver up to 150mA to the voltage regulated output. It features very low quiescent current and high efficiency over a large portion of its load range, making this device ideal for battery-powered applications. Furthermore, the combination of few external components and small package size keeps the total converter board area to a minimum in space-restricted applications. The kB3310 uses a pulse skipping technique to provide a regulated output from a varying input supply. The kB3310 contains a thermal management circuit to protect the device under continuous output short-circuit conditions. The kB3310 has lead (Pb) free SOT23-6 package and is rated over the -30°C to +85°C temperature range. Step-Up Voltage Converter Input Voltage Range: 2.7 to 5.0V Low input current 25PA High Output Voltage Accuracy r3% 150mA output current with VIN t3.3V Peak Current 250mA for 100ms High Frequency 750kHz Operation Logic-Controlled Shutdown Short-Circuit/Over-Temperature Protection Lead (Pb) Free SOT23-6 Package APPLICATIONS Cellular Phones Digital Cameras Handheld Electronics LED/Display Backlight Driver LEDs for Camera Flash Portable Communication Devices MP3 Players GPS Receivers PDAs APPLICATION CIRCUIT VOUT =5.0V (150 mA) COUT = 10µF ON/OFF 1 2 3 VOUT GND SHDN C+ VIN 6 1µF 5 C- 4 VIN =3.3V to 5.0V CIN = 10µF KB3310 1 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter PIN CONFIGURATION SOT23-6 C+ VIN C- 310 xxxxx OUT GND /SHDN ORDER INFORMATION Part number KB3310 GRE Package SOT23-6, Green Marking 310, Date Code with one bottom line x x x x x : Date Code PIN DESCRIPTION Pin No. 1 2 3 4 5 6 Symbol OUT GND /SHDN CN VIN CP I/O O P I P + Description Regulated Output Ground Chip Enable Input Flying Capacitor negative terminal Input Supply Flying Capacitor positive terminal 2 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 0 Preliminary Product Information MicroPower Charge Pump Converter ABSOLUTE MAXIMUM RATINGS Parameter Power supply voltage OUT pin voltage SHDN pin voltage Allowable dissipation Operating temperature Storage temperature Symbol Condition VIN VOUT VSHDN PD TOP Tstg — — — — — — ELECTRICAL CHARACTERISTICS Parameter (Ta=+250C) Symbol Rated Value Min. Max. — 6.5 — 6.5 — 6.5 — 250 -30 +85 -55 +125 Unit V V V mW 0 C 0 C 0 (Ta=+25 C) Condition Min. Values Typ. Max. 2.7 - VOUT V Unit Input Voltage VIN VOUT =5.0V No Load Supply Current VStart 2.7V< VIN <5.0V,IOUT=0mA, /SHDN=VIN - 25 40 ӴA 2.7V< VIN <5.0V ,IOUTd50mA 4.85 5.0 5.15 V Output Voltage VOUT 3.3V< VIN <5.0V ,IOUTd150mA 4.85 5.0 5.15 V - - 1 ӴA - - 4 ӴA VIN =3V, IOUT =50mA - 25 - mV VIN =3.3V,IOUT =150mA - 40 - mV VIN =3V, IOUT =50mA - 85 - % VIN =2.7V, IOUT =50mA - 93 - % Oscillator Free Running 600 850 1000 KHz VIH 1.4 - - V VIL - - 0.3 V Shutdown Current Ripple Current Efficency Frequency EN Input Threshold ISHDN 2.7V< VIN <3.6V ,IOUT=0mA, EN=0V 3.6V< VIN <5.0V ,IOUT=0mA, EN=0V VRipple K F IIH EN= VIN -2 - 2 ӴA IIL EN= 0V -2 - 2 ӴA OUT Turn-ON time tON VIN =3V, IOUT =0mA - 2 - ms Short-Circuit Current ISC VIN =3V,VOUT =GND,EN=3V - 300 - mA EN Input Current 3 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter TYPICAL PERFORMANCE CHARACTERISTICS 4 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter TYPICAL PERFORMANCE CHARACTERISTICS APPLICATION CIRCUIT LED Driver from a Li-Ion Battery Source 1 = 10µF PWM/EN 2 3 VOUT GND SHDN C+ VIN 6 1µF 5 C- 4 VIN =3.0V to 5.0V CIN = 10µF KB3310 5 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter APPLICATION INFORMATION 1. Capacitor Selection It is very important to select the capacitors CIN, COUT and CFLY because they will affect turn on time, output ripple and transient performance. Ceramic capacitors offer many advantages over other tantalum and aluminum electrolytic counterparts. In general, the capacitors can be used 10PF for CIN and COUT, and 1PF for CFLY under maximum output load conditions. Lower values for CIN, COUT and CFLY may be utilized for light load current applications. Large ceramic capacitors are typically composed of X7R, X5R, Z5U or Y5V dielectric materials. If Y5V and Z5U are selected for used with the charge pump, the nominal value should be doubled to compensated for the capacitor tolerance which can vary more than r50% over operating temperature range. X7R and X5R dielectrics are much more desirable. The temperature tolerance of X7R dielectric is better than r15% . 2. Charge Pump Efficiency The KB3310 is a regulated output voltage charger pump converter. The Efficiency can be defined as a linear voltage regulator with an effective output voltage that is equal to two times the input voltage. The expression to define the ideal efficiency can be shown as: K POUT PIN VOUT u I OUT VIN u 2 I OUT VOUT 2 u VIN Refer to the Typical Characteristics section for measured plots of efficiency versus input voltage and output load current for the given charge pump output voltage options. 3. Layout Guideline As a general rule for charge pump boost converters, all external capacitors should be located as closed as possible to the device package with minimum length trace connections. A local component side ground plane is recommended. If this is not possible due to the layout limitations, assure good ground connections by the use of large or multiple PCB via’s. 6 KB3310 Kingbor Technology Co.,Ltd TEL:(86)0755-83095458 FAX:(86)0755-88364052 Preliminary Product Information MicroPower Charge Pump Converter PACAGE DESCRIPTION Small Outline SOT23-6 b e E C e1 D E1 r L A A2 A1 SYMBOL A A1 A2 b C D E E1 L e e1 r MIN 0.035 0.000 0.035 0.010 0.003 0.110 0.102 0.059 0.014 00 INCHES 0.037ref 0.075ref Kingbor Technology TEL:(86) 0755-83095458 FAX: (86) 0755-88364052 www.kingbor.com MAX 0.057 0.006 0.051 0.020 0.008 0.122 0.118 0.069 0.022 100 MILLIMETERS MIN MAX 0.90 1.45 0.00 0.15 0.90 1.30 0.25 0.50 0.08 0.20 2.80 3.10 2.60 3.00 1.50 1.75 0.35 0.55 0.95ref 1.90ref 00 100 NOTES - - 7