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BL8022 Dataheets PDF



Part Number BL8022
Manufacturers SHANGHAI BELLING
Logo SHANGHAI BELLING
Description 800mA 1.5MHz 7V Synchronous Buck Converter
Datasheet BL8022 DatasheetBL8022 Datasheet (PDF)

BL8022 800mA 1.5MHz 7V Synchronous Buck Converter DESCRIPTION The BL8022 is a high-efficiency, DC-to-DC stepdown switching regulators, capable of delivering up to 800mA of output current. The device operates from an input voltage range of 2.6V to 7.0V and provides an output voltage from 0.6V to VIN, making the BL8022 ideal for low voltage power conversions. Running at a fixed frequency of 1.5MHz allows the use of small external components, such as ceramic input and output caps, as well as smal.

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BL8022 800mA 1.5MHz 7V Synchronous Buck Converter DESCRIPTION The BL8022 is a high-efficiency, DC-to-DC stepdown switching regulators, capable of delivering up to 800mA of output current. The device operates from an input voltage range of 2.6V to 7.0V and provides an output voltage from 0.6V to VIN, making the BL8022 ideal for low voltage power conversions. Running at a fixed frequency of 1.5MHz allows the use of small external components, such as ceramic input and output caps, as well as small inductors, while still providing low output ripples. This low noise output along with its excellent efficiency achieved by the internal synchronous rectifier, making BL8022 an ideal green replacement for large power consuming linear regulators. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermaloverload protection improves design reliability. BL8022 is housed in a SOT23-5 Package FEATURES  High Efficiency: Up to 96%  Capable of Delivering 800mA  1.5MHz Switching Frequency  No External Schottky Diode Needed  Low dropout 100% Duty operation  Internal Compensation and Soft-Start  Current Mode control  0.6V Reference for Low Output voltages  Logic Control Shutdown (IQ<1uA)  Thermal shutdown and UVLO  Available in SOT23-5 APPLICATIONS  Cellular phones  Digital Cameras  MP3 and MP4 players  Set top boxes  Wireless and DSL Modems  USB supplied Devices in Notebooks  Portable Devices TYPICAL APPLICATION VIN 2.6V to 7V 10uF IN SW BLLC83042026 EN FB GND 2.2uH VOUT 1.81V.8/V80/10AmA 240K 10uF 120K PIN OUT & MARKING 1.81V/.88V00/1mAA Step-Down Converter GG: Product Code YW: Date code (Year & Week) www.belling.com.cn 1 BL8022 ORDERING INFORMATION PART No. BL8022CB5TR PACKAGE SOT23-5 Tape&Reel 3000/Reel ABSOLUTE MAXIMUM RATING Parameter Value Max Input Voltage 7V Max Operating Junction Temperature(Tj) 125C Ambient Temperature(Ta) -40C – 85C Maximum Power Dissipation SOT23-5 400mW Storage Temperature(Ts) -40C - 150C Lead Temperature & Time 260C, 10S ESD (HBM) >2000V Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. RECOMMENDED WORK CONDITIONS Parameter Input Voltage Range Operating Junction Temperature(Tj) Value Max.7V -20C –125C ELECTRICAL CHARACTERISTICS (VDD=5V, TA=25C) Symbol Parameter Conditions VDD Vref Ifb Iq LnReg LdReg Fsoc RdsonP RdsonN Ilimit Iswlk Ienlk Vh_en Vl_en Input Voltage Range Feedback Voltage Feedback Leakage current Quiescent Current Line Regulation Load Regulation Switching Frequency PMOS Rdson NMOS Rdson Peak Current Limit SW Leakage Current EN Leakage Current EN Input High Voltage EN Input Low Voltage Vin=5V Active, Vfb=0.65, No Switching Shutdown Vin=2.7V to 5.5V Iout=0.01 to 1A Vout=5.5V, VSW=0 or 5.5V, EN=0V Min 2.6 0.585 0.8 1.5 Typ 0.6 0.1 35 0.04 0.1 1.5 300 220 1.5 Max 7.0 0.615 0.4 1 0.2 0.2 400 300 2 10 1 0.4 Unit V V uA uA uA %/V %/A MHz mohm mohm A uA uA V V www.belling.com.cn 2 BL8022 PIN DESCRIPTION PIN # 1 2 3 4 5 NAME EN GND SW IN FB DESCRIPTION Enable pin for the IC. Drive the pin to high to enable the part, and low to disable Ground Inductor connection. Connect an inductor between SW and the regulator output. Supply voltage. Feedback input. Connect an external resistor divider from the output to FB and GND to set the output to a voltage between 0.6V and Vin ELECTRICAL PERFORMANCE Tested under TA=25C, unless otherwise specified Efficiency (%) Efficiency VS Load Current, Vout=1.8V 100 95 90 85 80 75 70 65 60 55 50 45 40 35 0 Vin=4.2V Vin=3.6V Vin=2.7V 100 200 300 400 500 600 700 800 900 1000 Load Current (mA) Efficiency VS Load Current, Vout=1.2V 100 95 90 85 80 75 70 65 60 55 50 45 40 35 0 Vin=4.2V Vin=3.6V Vin=2.7V 100 200 300 400 500 600 700 800 900 1000 Load Current (mA) Efficiency (%) Efficiency VS Load Current, Vout=2.5V 100 95 90 85 80 75 70 65 60 55 Vin=4.2V 50 Vin=3.6V 45 Vin=2.7V 40 35 0 100 200 300 400 500 600 700 800 900 1000 Load Current (mA) Efficiency (%) www.belling.com.cn 3 Output Ripple and SW at no load Vin=5V / Vout=2.5V BL8022 Output Ripple and SW at 1A load Vin=5V / Vout=2.5V BLOCK DIAGRAM IN 0.6V Ref UVLO & Thermal shutdown + + EA EN -Σ Comp Network OSC FB Slope Comp + ISense - PWM Logic AntiShootThrough Driver + Vcomp - SW GND www.belling.com.cn 4 BL8022 DETAILED DESCRIPTION The BL8022 high-efficiency switching regulator is a small, simple, DC-to-DC step-down converter capable of delivering up to 1A of output current. The device operates in pulse-width modulation (PWM) at 1.5MHz from a 2.6V to 5.5V input voltage and provides an output voltage from 0.6V to VIN, making the BL8022 ideal for on-board postregulation applications. An internal synchronous rectifier improves efficiency and eliminates the typical Schottky free-wheeling diode. Using the on resistance of the internal high-side MOSFET to sense switching currents eliminates current.


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