ADP2503: 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter
The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages above, below, or equal to the regulated output voltage. The ...More
ADP2503: 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter
Product Description
The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages above, below, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count and maximize efficiency. At high load currents, the ADP2503/ADP2504 use a currentmode, fixed frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power-saving pulse skip mode that reduces the switching frequency under light load conditions to save power. For wireless and other low noise applications where variable frequency pulse skip mode may cause interference, a logic control input forces fixed frequency PWM operation under all load conditions
The ADP2503/ADP2504 can run from input voltages between 2.3 V and 5.5 V, making them ideal for single Li+/Li-polymer cell and multiple alkaline/NiMH cell applications where the output voltage is within the battery voltage range. The ADP2503/ ADP2504 have fixed output options ranging from 2.8 V to 5 V. Compensation is internal to minimize the number of external components.
During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Other key features include under voltage lockout to prevent deep battery discharge and soft start to prevent input current overshoot at startup.
Applications
Data Sheet, Rev. PrA, 5/08
ADP2108 - Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter
ADP2504 - 1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converter
ADP2503 - 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter
| 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 |
| ADP2107 | 2.7V-5.5V | 4 Options/1.2V-3.3V | 0.8V to Vin | 2A | 2.9A | 30µA | 1.2 MHz |