Overview
The ADP2138ACBZ-3.0-R7 is a high-efficiency, low quiescent current, synchronous step-down DC-to-DC converter produced by Analog Devices Inc. This device is part of the ADP2138/ADP2139 series, known for its compact design and robust performance. The ADP2138ACBZ-3.0-R7 is specifically configured to provide a fixed output voltage of 3.0 V and supports a maximum load current of 800 mA across its input voltage range. It features an internal synchronous rectifier, compensation, and soft start, along with current overload and thermal shutdown protections, ensuring reliable operation in various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.3 | 5.5 | V | |
| Output Voltage | 3.0 | V | ||
| Maximum Load Current | 800 | mA | ||
| Switching Frequency | 2.6 | 3.0 | 3.4 | MHz |
| Output Voltage Accuracy (PWM mode) | -2 | +2 | % | |
| Line Regulation (VIN = 2.3 V to 5.5 V, PWM mode) | 0.25 | %/V | ||
| Shutdown Current | 0.2 | 1.0 | μA | |
| Operating Temperature Range | -40 | 125 | °C | |
| Thermal Shutdown Threshold | 150 | °C |
Key Features
- High efficiency, low quiescent current synchronous step-down DC-to-DC converter
- Internal synchronous rectifier, compensation, and soft start
- Current overload and thermal shutdown protections
- Ultralow shutdown current: 0.2 μA (typical)
- Forced PWM and automatic PWM/PSM modes
- Supported by ADIsimPower™ design tool
- Internal discharge switch (ADP2139 model)
- Compact design requiring only three tiny external components
Applications
- PDAs and palmtop computers
- Wireless handsets
- Digital audio and portable media players
- Digital cameras and GPS navigation units
Q & A
- What is the maximum load current of the ADP2138ACBZ-3.0-R7?
The maximum load current is 800 mA.
- What are the available output voltages for the ADP2138/ADP2139 series?
The available fixed output voltages are 3.3 V and 3.0 V.
- What is the switching frequency of the ADP2138ACBZ-3.0-R7?
The switching frequency is between 2.6 MHz and 3.4 MHz.
- Does the ADP2138ACBZ-3.0-R7 have thermal shutdown protection?
- What is the typical shutdown current of the ADP2138ACBZ-3.0-R7?
The typical shutdown current is 0.2 μA.
- What operating modes does the ADP2138ACBZ-3.0-R7 support?
- What is the purpose of the MODE pin on the ADP2138ACBZ-3.0-R7?
The MODE pin determines whether the buck regulator operates in PWM mode or power save mode.
- What is the recommended minimum input and output capacitance for the ADP2138ACBZ-3.0-R7?
The recommended minimum capacitance is 4.7 μF.
- What are some typical applications for the ADP2138ACBZ-3.0-R7?
- Is the ADP2138ACBZ-3.0-R7 supported by any design tools?
