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KB3436 Dataheets PDF



Part Number KB3436
Manufacturers Kingbor Technology
Logo Kingbor Technology
Description Micropower Synchronous Boost Converter
Datasheet KB3436 DatasheetKB3436 Datasheet (PDF)

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3436 600mA, 650kHz Micropower Synchronous Boost Converter with Output Disconnect FEATURES Up to 96% efficiency Low start-up voltage 0.8V Internal synchronous rectifier Up to 2MHz switching allows for tiny external components www.DataSheet4U.com ƒ 0.5V to 4.4V input range ƒ 2.5V to 5.0V output range (Note 3) ƒ Feedback Voltage: 1.00V +/-2% ƒ Logic controlled shutdown (<1µA) ƒ Low 250µA operating supply current (measured at.

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Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3436 600mA, 650kHz Micropower Synchronous Boost Converter with Output Disconnect FEATURES Up to 96% efficiency Low start-up voltage 0.8V Internal synchronous rectifier Up to 2MHz switching allows for tiny external components www.DataSheet4U.com ƒ 0.5V to 4.4V input range ƒ 2.5V to 5.0V output range (Note 3) ƒ Feedback Voltage: 1.00V +/-2% ƒ Logic controlled shutdown (<1µA) ƒ Low 250µA operating supply current (measured at VOUT) ƒ Pulse skipping at light load for extended battery life ƒ Generates 3.3V at 100mA from single AA cell ƒ Stable with ceramic output capacitor ƒ Low profile 6-Leads SOT23-6 package ƒ ƒ ƒ ƒ DESCRIPTION converter delivering high efficiency in a SOT23-6 package. The device has an internal NMOS switch and PMOS synchronous rectifier and has the capacity of supplying 3.3V at 100mA from a single AA cell input. High frequency switching (up to 2MHz) minimizes the board area by allowing the use of tiny, low profile inductors and ceramic capacitors. The KB3436 provides automatic pulse skipping at light loads, thus reducing the supply current for extended battery life. At shutdown, the KB3436 fully discharges the output to ground and draws no supply current. The KB3436 is available in small SOT23-6 package with both fixed and adjustable output voltage versions. APPLICATIONS ƒ ƒ ƒ ƒ ƒ ƒ PDAs and organizers Digital cameras Wireless mice/ keyboards Portable medical equipment Cordless phones Wireless Headsets TYPICAL APPLICATION 100 4.7µH 2-Cell to 3.3V Efficiency 100 VIN = 3V 90 VOUT 3.3V 250mA 4.7 µF 200K EFFICIENCY (%) + EFFICIENCY VIN = 2.4V 10 POWER LOSS (W) 2-CELL AA 4.7µF VIN SW VOUT 460K FB 80 70 60 50 40 0.1 1 0.1 VIN = 3V 0.01 KB3436 OFF ON SHDN GND VIN = 2.4V POWER LOSS 0.001 0.0001 1000 Figure 1. 2-Cell to 3.3V Synchronous Boost Converter 1 10 100 OUTPUT CURRENT (mA) 1 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3436 PACkAGE/ORDER INFORMATION TOP VIEW SW 1 GND 2 FB 3 ● ABSOLUTE MAXIMUM RATINGS VIN Voltage .............................................. – 0.3V to 4.4V SW Voltage ................................................. – 0.3V to 6V SHDN, FB Voltage ....................................... – 0.3V to 6V VOUT ........................................................... – 0.3V to 6V Operating Temperature Range ................ – 40°C to 85°C Storage Temperature Range ................... – 65°C to 150° Lead Temperature (Soldering, 10 sec).................. 300°C www.DataSheet4U.com ORDER PART NUMBER 6V IN 5V OUT 4 SHDN KB3436 TOP MARKING DGABF TJMAX = 125°C, eJC = 102°C/W DGABF The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V, unless otherwise specified. PARAMETER Minimum Start-Up Voltage Minimum Operating Voltage Output Voltage Adjust Range Feedback Voltage +/-2% Feedback Input Current Quiescent Current (Burst Mode Operation) Quiescent Current (Shutdown) Quiescent Current (Active) NMOS Switch Leakage PMOS Switch Leakage NMOS Switch On Resistance PMOS Switch On Resistance NMOS Current Limit Burst Mode Operation Current Threshold Current Limit Delay to Output Max Duty Cycle Switching Frequency SHDN Input High SHDN Input Low SHDN Input Current Soft-Start Time VSHDN = 5.5V SHDN to 90% of VOUT 0.01 2.5 VFB = 0.9V ● ● ELECTRICAL CHARACTERISTICS CONDITIONS MIN TYP 0.80 0.5 MAX 0.65 5 1.020 50 30 1 500 5 5 UNITS V V V V nA µA µA µA µA µA 1 1 mA mA ns % ILOAD = 1mA, VOUT = 0V SHDN = VIN (Note 3) (Note 5) ● 2.5 0.980 1.000 1 20 0.01 350 0.1 0.1 0.35 0.45 600 850 1.25 40 80 500 1 90 650 VFB = 1.05V VFB = 1.2V (Note 4) VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V Measured on VOUT, Nonswitching VSW = 5V VSW = 5V, VOUT = 0V L = 4.7µH (LTC3429 Only) 800 0.35 1 kHz V V µA ms 2 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3436 Efficiency vs Input Voltage TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified) Single-Cell to 3.3V Efficiency 100 90 100 10 100 VIN = 3V VIN = 1.5V EFFICIENCY VIN = 1.2V 70 VIN = 1.2V VIN = 1.5V POWER LOSS 50 40 0.1 POWER LOSS 0.001 0.0001 1000 50 40 0.1 0.001 0.0001 1000 50 40 0.5 1.5 2.5 3.5 INPUT VOLTAGE (V) 4.5 VIN > VOUT PMOS LDO MODE 0.1 0.01 90 EFFICIENCY VIN = 2.4V 10 90 2-Cell to 3.3V Efficiency 100 100 VOUT = 3.3V IOUT = 50mA POWER LOSS (W) POWER LOSS (W) EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 1 80 70 60 1 0.1 VIN = 3V 0.01 80 70 60 VIN = 2.4V www.DataSheet4U.com 60 1 10 100 OUTPUT CURRENT (mA) 1 10 100 OUTPUT CURRENT (mA) 2-Cell to 5V Efficiency 100 90 VIN = 3V EFFICIENCY VIN = 2.4V VIN = 2.4V VIN = 3V 60 POWER LOSS 50 40 0.1 0.001 0.0001 1000 50 0.01 100 10 100 Li-Ion to 5V Efficiency 100 VIN = 4.2V 90 EFFICIENCY VIN = 3.6V 10 Burst Mode Output Current Threshold vs Input Voltage 35 30 L = 4.7µH OUTPUT CURRENT (mA) EFFICIENCY (%) EFFICIE.


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