Overview
The ADP2140ACPZ2518R7, produced by Analog Devices Inc., is a highly integrated power management solution that combines a high-efficiency, low quiescent current step-down DC-DC converter with a 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 optimize power efficiency and minimize component count, requiring only four external components for operation. It supports input voltages from 2.3 V to 5.5 V, making it suitable for various power sources including single Li+/Li− polymer cells, multiple alkaline/NiMH cells, and PCMCIA batteries.
Key Specifications
| Parameter | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Input Voltage Range | VIN1 | 2.3 | 5.5 | V | |
| Buck Output Accuracy | VOUT | -1.5% | +1.5% | % | |
| Transient Load Regulation | VTR-LOAD | 75 mV | mV | ||
| Transient Line Regulation | VTR-LINE | 25 mV | mV | ||
| Output Current (Buck) | IOUT | 600 mA | mA | ||
| Output Current (LDO) | 300 mA | mA | |||
| Minimum Input Capacitance | 7.5 µF | µF | |||
| Minimum Output Capacitance (Buck) | 10 µF | µF | |||
| Minimum Output Capacitance (LDO) | 0.7 µF | µF | |||
| Minimum Inductor Value | 0.7 µH | µH |
Key Features
- High-efficiency, low quiescent current step-down DC-DC converter with a maximum output current of 600 mA.
- Low dropout linear regulator (LDO) with a maximum output current of 300 mA.
- Compact 10-lead 3 mm × 3 mm LFCSP package.
- Input voltage range from 2.3 V to 5.5 V, supporting various power sources.
- Power-saving variable frequency mode to reduce switching frequency under light loads.
- Soft start to prevent input current overshoot at startup.
- Undervoltage lockout to prevent deep battery discharge.
- Short-circuit protection and thermal overload protection.
- Power-good pin and internal compensation.
- User-selectable power sequencing options through two enable inputs.
Applications
- Portable electronics such as smartphones, tablets, and handheld devices.
- Battery-powered devices including those using Li+/Li− polymer cells, alkaline/NiMH cells, and PCMCIA batteries.
- Industrial control systems and automation equipment.
- Medical devices requiring high efficiency and low power dissipation.
- Aerospace and defense applications where compact and reliable power management is crucial.
Q & A
- What is the input voltage range of the ADP2140?
The input voltage range of the ADP2140 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 regulator?
The maximum output current of the LDO regulator is 300 mA.
- What type of package does the ADP2140 come in?
The ADP2140 comes in a 10-lead 3 mm × 3 mm LFCSP package.
- Does the ADP2140 have power-saving features?
Yes, the ADP2140 has a power-saving variable frequency mode to reduce switching frequency under light loads.
- What protection features does the ADP2140 include?
The ADP2140 includes undervoltage lockout, short-circuit protection, and thermal overload protection.
- Can the ADP2140 be used in industrial applications?
Yes, the ADP2140 can be used in industrial control systems and automation equipment due to its high efficiency and reliability.
- Is the ADP2140 suitable for medical devices?
Yes, the ADP2140 is suitable for medical devices requiring high efficiency and low power dissipation.
- What is the operating temperature range of the ADP2140?
The operating temperature range of the ADP2140 is from −40°C to +125°C.
- Does the ADP2140 support power sequencing?
Yes, the ADP2140 supports user-selectable power sequencing options through two enable inputs.
