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A7506 Dataheets PDF



Part Number A7506
Manufacturers AiT Semiconductor
Logo AiT Semiconductor
Description 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER
Datasheet A7506 DatasheetA7506 Datasheet (PDF)

AiT Semiconductor Inc. www.ait-ic.com A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER DESCRIPTION FEATURES The A7506 is synchronous, fixed frequency, step-up High Efficiency: Up to 92% DC/DC converters delivering high efficiency in a 1.2MHz Constant Switching Frequency 6-lead SOT package. Capable of supplying 3.3V at 3.3V Output Voltage at IOUT=100mA from a Single 100mA from a single AA cell input, the device AA Cell; 5.0V Output Voltage at IOUT=500mA from c.

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AiT Semiconductor Inc. www.ait-ic.com A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER DESCRIPTION FEATURES The A7506 is synchronous, fixed frequency, step-up High Efficiency: Up to 92% DC/DC converters delivering high efficiency in a 1.2MHz Constant Switching Frequency 6-lead SOT package. Capable of supplying 3.3V at 3.3V Output Voltage at IOUT=100mA from a Single 100mA from a single AA cell input, the device AA Cell; 5.0V Output Voltage at IOUT=500mA from contain an internal NMOS switch and PMOS one Li battery. synchronous rectifier. A switching frequency of Low Start-up Voltage: 0.85V 1.2MHz minimizes solution footprint by allowing the Integrated main switch and synchronous rectifier. use of tiny, low profile inductors and ceramic No Schottky Diode Required capacitors. The current mode PWM design is 2.5V to 5V Output Voltage Range internally compensated, reducing external parts Automatic Pulse Skipping Mode Operation count. The A7506 features continuous switching at Tiny External Components light loads. Anti-ringing control circuitry reduces EMI <1µA Shutdown Current concerns by damping the inductor in discontinuous Anti-ringing Control Reduces EMI mode, and the device features low shutdown current Available in SOT-26 Package. of under 1A. The A7506 is available in SOT-26 Package. APPLICATION Cellular and Smart Phones ORDER INFORMATION Microprocessors and DSP Core Supplies Wireless and DSL Modems Package Type Part Number SOT-26 Note E6 A7506E6R-XXX A7506E6VR-XXX XXX=Output ADJ=Adjustable V: Green Package R : Tape & Reel AiT provides all Pb free products Suffix “ V “ means Green Package , Typical Application Circuit REV1.0 - APR 2009 RELEASED - Fig 1. A7506-ADJ -1- AiT Semiconductor Inc. www.ait-ic.com PIN DESCRIPTION A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER Pin # 1 2 3 4 5 6 Symbol SW GND FB SHDN VOUT VIN Top View Function Power Switch Pin. It is the switch node connection to Inductor. Ground Pin Feedback Input Pin. Connect FB to the center point of the external resistor divider. The feedback threshold voltage is 1.23V. Chip Shutdown Signal Input. Logic high is normal operation mode, Logic Low is Shutdown. Typically, this pin is connected to VIN through a 1mΩ resistor. Power Output Pin. VOUT is held 0.6V below than VIN in shutdown. Power Supply Input. Must be closely decoupled to GND, Pin 2, with a 4.7µF or greater ceramic capacitor. REV1.0 - APR 2009 RELEASED - -2- AiT Semiconductor Inc. www.ait-ic.com A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER ABSOLUTE MAXIMUM RATINGS Input voltage, VDD -0.3V to +6V SW Voltage -0.3V to +6V FB, SHDN Voltages -0.3V to +6V VOUT Voltage -0.3V to +6V Operating Temperature Range 40°C to +85°C Storage Temperature Range -65°C to +150°C Lead Temperature (Soldering, 10s) TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ = TA + (PD) x (250°C/W). +300°C Stresses above 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 Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Thermal Resistance Package θJA SOT26 250°C /W Thermal Resistance is specified with approximately 1 square of 1 oz copper. θJC 110°C /W REV1.0 - APR 2009 RELEASED - -3- AiT Semiconductor Inc. www.ait-ic.com A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER ELECTRICAL CHARACTERISTICS VIN =1.2V, VOUT=3.3V, TA = 25°C, Test Circuit of Fig 1., unless otherwise specified. Parameter Conditions MIN TYP Minimum Start-Up Voltage IOUT = 1mA 0.85 Minimum Operating Voltage VSHDN = VIN 0.5 Output Voltage Range 2.5 Feedback Voltage –40oC ≤TA≤ 85oC 1.192 1.230 Quiescent Current(Shutdown) VSHDN = 0V Quiescent Current(Active) Measured on VOUT 0.01 300 NMOS Switch Leakage VSW = 5V 0.1 PMOS Switch Leakage VSW = 0V 0.1 VOUT = 3.3V NMOS Switch ON Resistance VOUT = 5V 0.40 0.35 VOUT = 3.3V PMOS Switch ON Resistance VOUT = 5V 0.70 0.60 Output Voltage VOUT = 3.3V, IOUT = 1mA VOUT = 5V , IOUT = 1mA, VIN = 2.4V 3.201 4.850 3.300 5.000 Line Regulation VIN = 0.8V to 3.0V, IOUT = 10mA 1 Load Regulation IOUT = 1mA to 100mA 0.02 NMOS Current Limit 600 850 Current Limit Delay to Output 40 Max Duty Cycle VFB = 1.15V, –40oC ≤TA≤ 85oC 80 85 Switching Frequency –40oC ≤TA ≤85oC 0.85 1.2 SHDN Input Threshold 0.35 0.60 SHDN Input Current VSHDN = 5.5V 0.01 MAX 1 0.65 5 1.268 1 500 5 5 3.399 5.150 1.5 1.50 1 unit V V V V µA µA µA µA Ω Ω Ω Ω V V %/V %/mA mA ns % MHz V µA REV1.0 - APR 2009 RELEASED - -4- AiT Semiconductor Inc. www.ait-ic.com A7506 600mA, 1.2MHz CONSTANT FREQUENCY SYNCHRONUS STEP-UP DC-DC CONVERTER TYPICAL PERFORMANCE .


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