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
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
- Enlarge
- 原理图符号和PCB封装
Typical Application Circuit Diagram for ADP3051
500 mA Synchronous Buck Switching Regulator
Typical Application Circuit Diagram for ADP3051
ADP2108 - Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter
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| 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 |