Overview
The ADP2138ACBZ-0.8-R7 is a compact, high-efficiency step-down DC-to-DC converter produced by Analog Devices Inc. This device is part of the ADP2138/ADP2139 series and is designed to operate with input voltages ranging from 2.3 V to 5.5 V, making it suitable for a variety of power sources including single lithium or lithium polymer cells, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources.
The ADP2138ACBZ-0.8-R7 can regulate an output voltage down to 0.8 V with a maximum load current of 800 mA. It features an internal power switch and synchronous rectifier, which minimize the external part count and enhance efficiency. The device also includes internal soft start and is internally compensated, ensuring smooth and efficient operation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.3 | 5.5 | V | |
| Output Voltage | 0.8 | V | ||
| Output 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 | ||
| Load Regulation (ILOAD = 0 mA to 800 mA) | -0.95 | %/A | ||
| Shutdown Current (EN = 0 V, TA = TJ = -40°C to +85°C) | 0.2 | 1.0 | μA | |
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | 6-UFBGA, WLCSP |
Key Features
- High Efficiency: The ADP2138ACBZ-0.8-R7 operates with high efficiency across a wide range of loads, thanks to its fixed frequency, current-mode PWM control architecture and power save mode at light loads.
- Internal Power Switch and Synchronous Rectifier: Minimizes external part count and enhances efficiency.
- Internal Soft Start and Compensation: Ensures smooth startup and stable operation.
- Undervoltage Lockout (UVLO): Prevents deep battery discharge by disconnecting the input from the output when the input voltage falls below a predefined threshold.
- Logic Controlled Shutdown: The device draws only 0.2 μA (typical) from the input source during shutdown.
- Compact Package: Available in a 6-UFBGA, WLCSP package, making it suitable for space-constrained applications.
- Lead-Free and RoHS Compliant: Meets environmental standards for lead-free and RoHS compliance.
Applications
- Portable Electronics: Suitable for devices powered by single lithium or lithium polymer cells, such as smartphones, tablets, and handheld games.
- Industrial Control Systems: Can be used in various industrial control systems requiring efficient and reliable power conversion.
- Medical Devices: Applicable in medical devices that require high efficiency and low power consumption.
- Automotive Systems: Can be used in automotive systems that need efficient power conversion from various input sources.
- Consumer Electronics: Suitable for a wide range of consumer electronics requiring compact and efficient power solutions.
Q & A
- What is the input voltage range of the ADP2138ACBZ-0.8-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum output current of the ADP2138ACBZ-0.8-R7?
The maximum output current is 800 mA.
- What is the switching frequency of the ADP2138ACBZ-0.8-R7?
The switching frequency is between 2.6 MHz and 3.4 MHz.
- Does the ADP2138ACBZ-0.8-R7 have internal soft start and compensation?
Yes, it includes internal soft start and is internally compensated.
- What is the operating temperature range of the ADP2138ACBZ-0.8-R7?
The operating temperature range is from -40°C to 85°C.
- Is the ADP2138ACBZ-0.8-R7 lead-free and RoHS compliant?
Yes, it is lead-free and RoHS compliant.
- What is the package type of the ADP2138ACBZ-0.8-R7?
The package type is 6-UFBGA, WLCSP.
- How does the ADP2138ACBZ-0.8-R7 manage power efficiency at light loads?
The device operates in power save mode at light loads, which improves light load efficiency by reducing regulation power losses.
- What is the shutdown current of the ADP2138ACBZ-0.8-R7?
The shutdown current is typically 0.2 μA when the enable pin (EN) is set to 0 V.
- Does the ADP2138ACBZ-0.8-R7 have undervoltage lockout (UVLO) protection?
Yes, it includes UVLO to prevent deep battery discharge.
