Overview
The ADP2138ACBZ-1.5-R7 is a high-efficiency, low quiescent current, synchronous step-down DC-DC converter produced by Analog Devices Inc. This component is part of the ADP2138 and ADP2139 series, known for their robust performance and versatility in various power management applications. The ADP2138ACBZ-1.5-R7 is specifically configured to provide a fixed output voltage of 1.5 V and can handle load currents up to 800 mA. It operates over an input voltage range of 2.3 V to 5.5 V, making it suitable for a wide range of power sources including single lithium or lithium polymer cells, multiple alkaline or NiMH cells, and standard USB and PCMCIA power sources.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.3 | 5.5 | V | |
| Output Voltage | 1.5 | 1.5 | V | |
| Maximum Load Current | 800 | mA | ||
| Switching Frequency | 2.6 | 3.0 | 3.4 | MHz |
| Operating Temperature Range | -40 | 85 | °C | |
| 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 |
Key Features
- High Efficiency: The ADP2138ACBZ-1.5-R7 operates with high efficiency across a wide range of load conditions, thanks to its synchronous rectifier and internal power switch.
- Low Quiescent Current: The device features a low quiescent current, which helps in reducing power consumption, especially in standby or light load conditions.
- Power Save Mode (PSM): The regulator shifts to power save mode at light loads, improving light load efficiency by reducing switching losses and entering an idle mode when possible.
- Internal Soft Start and Compensation: The ADP2138ACBZ-1.5-R7 includes internal soft start and compensation, ensuring stable and reliable operation without the need for external components.
- Undervoltage Lockout (UVLO): This feature prevents deep battery discharge by disconnecting the input from the output when the input voltage falls below a predefined threshold.
- MODE Pin for Operation Control: The MODE pin allows the user to select between PWM mode and power save mode, providing flexibility in application design.
Applications
- Portable Electronics: Suitable for powering components in smartphones, tablets, and other portable devices due to its high efficiency and low quiescent current.
- Industrial Automation: Can be used in various industrial automation systems where efficient power management is crucial.
- Medical Devices: Applicable in medical devices that require reliable and efficient power conversion.
- Consumer Electronics: Ideal for use in consumer electronics such as set-top boxes, gaming consoles, and other devices requiring efficient DC-DC conversion.
Q & A
- What is the input voltage range of the ADP2138ACBZ-1.5-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum load current of the ADP2138ACBZ-1.5-R7?
The maximum load current is 800 mA.
- What is the switching frequency of the ADP2138ACBZ-1.5-R7?
The switching frequency is between 2.6 MHz and 3.4 MHz.
- Does the ADP2138ACBZ-1.5-R7 have an internal soft start feature?
Yes, it includes internal soft start and compensation.
- What is the purpose of the MODE pin on the ADP2138ACBZ-1.5-R7?
The MODE pin allows the user to select between PWM mode and power save mode.
- What is the shutdown current of the ADP2138ACBZ-1.5-R7 when EN = 0 V?
The shutdown current is typically 0.2 μA to 1.0 μA.
- Does the ADP2138ACBZ-1.5-R7 have undervoltage lockout (UVLO) protection?
Yes, it includes UVLO to prevent deep battery discharge.
- What is the operating temperature range of the ADP2138ACBZ-1.5-R7?
The operating temperature range is from -40°C to 85°C.
- What type of output voltage regulation does the ADP2138ACBZ-1.5-R7 provide?
The device provides fixed output voltage regulation, in this case, 1.5 V.
- Is the ADP2138ACBZ-1.5-R7 suitable for use in portable electronics?
Yes, it is highly suitable due to its high efficiency and low quiescent current.
