Overview
The ADP2140ACPZ3318R7, produced by Analog Devices Inc., is a highly integrated power management solution that combines a high-efficiency, low quiescent current 600 mA step-down DC-DC converter with a 300 mA low dropout linear regulator (LDO). This device is packaged in a compact 10-lead 3 mm × 3 mm LFCSP, making it ideal for space-constrained applications. The ADP2140 is designed to operate from input voltages ranging from 2.3 V to 5.5 V, supporting various power sources including single Li+/Li− polymer cells, multiple alkaline/NiMH cells, and PCMCIA batteries. The device features a proprietary high-speed current-mode, constant frequency, pulse-width modulation (PWM) control scheme for excellent stability and transient response, along with power-saving variable frequency mode to extend battery life in portable applications.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | VIN1 | 2.3 | 5.5 | V | |
| Buck Output Accuracy | VOUT | -1.5% | +1.5% | % | |
| Output Current | IOUT | 600 | mA | ||
| LDO Output Current | 300 | mA | |||
| Transient Load Regulation | VTR-LOAD | 75 | mV | ||
| Transient Line Regulation | VTR-LINE | 25 | mV | ||
| Minimum Input Capacitance | CMIN | 7.5 | 10 | µF | |
| Minimum Output Capacitance | CMIN | 0.7 | 1.0 | µF | |
| Minimum Inductor Value | INDMIN | 0.7 | 1 | µH |
Key Features
- High-efficiency, low quiescent current 600 mA step-down DC-DC converter and a 300 mA LDO in a single package.
- Proprietary high-speed current-mode, constant frequency, PWM control scheme for excellent stability and transient response.
- Power-saving variable frequency mode to reduce switching frequency under light loads and extend battery life.
- Low input voltage minimum for the LDO, allowing it to be powered from the output of the buck regulator.
- Power-good pin, soft start, and internal compensation.
- User-selectable power sequencing options through two enable inputs.
- Undervoltage lockout, short-circuit protection, and thermal overload protection.
- Compact 10-lead 3 mm × 3 mm LFCSP package.
Applications
The ADP2140ACPZ3318R7 is suitable for a variety of applications, including portable electronics, battery-powered devices, and systems requiring efficient power management. Specific use cases include:
- Smartphones and tablets.
- Laptops and netbooks.
- Portable medical devices.
- Wearable technology.
- Industrial control systems.
Q & A
- What is the input voltage range of the ADP2140? The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum output current of the buck regulator? The maximum output current of the buck regulator is 600 mA.
- What is the maximum output current of the LDO? The maximum output current of the LDO is 300 mA.
- What type of PWM control scheme does the ADP2140 use? The ADP2140 uses a proprietary high-speed current-mode, constant frequency, PWM control scheme.
- Does the ADP2140 have power sequencing options? Yes, the ADP2140 has user-selectable power sequencing options through two enable inputs.
- What is the package type of the ADP2140? The ADP2140 is packaged in a 10-lead 3 mm × 3 mm LFCSP.
- What are the minimum capacitance requirements for the ADP2140? The minimum input and output capacitance should be greater than 0.7 µF and 1.0 µF, respectively.
- Does the ADP2140 have protection features? Yes, it includes undervoltage lockout, short-circuit protection, and thermal overload protection.
- What is the operating temperature range of the ADP2140? The operating temperature range is from -40°C to +125°C.
- Can the LDO be powered from the output of the buck regulator? Yes, the LDO can be powered from the output of the buck regulator, increasing efficiency and reducing power dissipation.
