ADP3051:  500 mA Synchronous Buck Switching Regulator

The ADP3051 is a high frequency, general purpose synchronous buck switching regulator capable of 500 mA continuous output current in an MSOP-8 package. It provides high efficiency, excellent dynamic ...More

ADP3051:  500 mA Synchronous Buck Switching Regulator

Product Description

The ADP3051 is a high frequency, general purpose synchronous buck switching regulator capable of 500 mA continuous output current in an MSOP-8 package. It provides high efficiency, excellent dynamic response, and is very simple to use. The switching frequency is nominally 600 kHz - synchronizable to 750 kHz - and allows for small, cost-saving external inductive and capacitive components. The current mode control loop is simple to compensate. Featuring a patented tri-mode, variable-frequency control technique, it operates in normal PWM current mode under heavy loads, and saves energy at lighter loads by switching automatically into a two level power-saving mode. Soft start and shutdown are integrated completely on chip, as is the power switch.

The ADP3051 supports output voltages as low as 0.8 V, while operating from a 2.5 to 5.5 V input, and is optimized for portable consumer and communications applications where long battery life and low power consumption are required. The ADP3051's low-voltage operation and 3 percent output regulation accuracy over line, load and temperature make it ideal for today's low voltage rails, providing the optimal solution for delivering power precisely and efficiently with minimal printed circuit board area.

Applications

  • PDAs and Palmtop Computers
  • Consumer Electronics
  • Portable Instruments

    • Features

    • 600 kHz PWM Frequency
    • Frequency Synchronizable up to 750 kHz
    • Output Voltage Range: 0.8 V to 5 V
    • Tri-mode Operation Enables Higher Efficiency
    • Automatic PWM to Variable Frequency Control at Light Load
    • Fully Integrated 600 mA Power Switch
    • Fully Integrated Soft Start and Shutdown
    • 3% Output Regulation Accuracy Over Line, Load, and Temp
    • Simple Loop Compensation
    • Space Saving MSOP-8 Package
    • Small Inductor and MLC Capacitors
    • Undervoltage Lockout

    Diagram

    ADP3051 Diagram
    Typical Application Circuit Diagram for ADP3051

    技术指标

    Vin Range 2.7V-5.5V
    Boost No
    Buck Yes
    Inverting No
    Iout (max) 0.5A
    Supply Current (max) 300µA
    Switching Frequency 550 kHz
    Vout Preset Summary ---
    Vout Adj Options 0.8V to 5.5V

    浏览其他的产品

    ADP2504 - 600 mA/1000 mA，2.5 MHz降压-升压式DC-DC转换器

    ADP2503 - 600 mA，2.5 MHz降压-升压式DC-DC转换器

    ADP2108 - Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter

    订阅新产品资料
    Part# Vin Range Vout Preset Summary Vout Adj Options Iout (max) Isw (Peak) Supply Current (max) Switching Frequency Step Down Step Up Inverting Pkg Product Description Price* (1000-4999) Pos Supply
    ADP1111 2V-30V 3 Options/3.3V-12V 1.2V to 30V, 1.2V to Vin 1.5A 1.5A 110µA 70 kHz Yes Yes Yes Plastic DIP-8, SOIC-8 Micropower Step Up/Down/Inverting Switching Regulator; Adjustable or Fixed 3.3V, 5V, 12V $2.05 +2 to +30
    ADP2108 2.3V-5.5V 11 Options/1V-3.3V --- 0.6A 1.3A 19µA 3 MHz Yes Yes No WLCSP-5 600 mA, 3 MHz Fast Transient Synchronous Step-Down Converter $0.80 +2.3 to +5.5
    ADP2504 2.3V-5.5V 6 Options/2.8V-5V --- 1A 1.3A 38µA 2.5 MHz Yes Yes No LFCSP-10 1 Ampere, 2.5 MHz Buck-Boost DC-to-DC Converter $1.40 +2.3 to +5.5
    ADP1611 2.5V-5.5V - Vin to 20V 1.2A 1.2A 600µA 1.2 MHz - Yes - MSOP-8 20 V,1.2 MHz Step-Up DC-to-DC Switching Converter $1.20 +2.5 to +5.5
    ADP1610 2.5V-5.5V - Vin to 12V 1.2A 1.2A 600µA 700 kHz or 1.2 MHz No Yes No MSOP-8 1.2 MHz DC-DC Step-Up (Boost) Switching Converter w/ Integrated Power Switch $1.12 +2.5 to +5.5
    ADP2102 2.7V-5.5V 8 Options/0.8V-1.875V 0.8V to 3.3V 0.6A 1A 99µA 3 MHz Yes No No LFCSP-8 3 MHz Synchronous Step-Down DC-to-DC Converter $1.23 +2.7 to +5.5
    ADP3051 2.7V-5.5V --- 0.8V to 5.5V 0.5A 1A 300µA 550 kHz Yes No No MSOP-8 500 mA PWM Step-Down DC-DC Converter with Synchronous Rectifier $2.65 +2.7 to +5.5
    ADP2105 2.7V-5.5V 4 Options/1.2V-3.3V 0.8V to Vin 1A 1.5A 30µA 1.2 MHz Yes No No LFCSP-16 1A Synchronous Step-Down DC-DC Converter $1.13 +2.7 to +5.5
    ADP2106 2.7V-5.5V 4 Options/1.2V-3.3V 0.8V to Vin 1.5A 2.25A 30µA 1.2 MHz Yes No No LFCSP-16 1.5A Synchronous Step-Down DC-DC Converter $1.25 +2.7 to +5.5