Overview
The ADP2138ACBZ-1.2-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 and ADP2139 series, which are designed to provide efficient power conversion with minimal external components. The ADP2138ACBZ-1.2-R7 operates with an input voltage range of 2.3 V to 5.5 V, making it suitable for various power sources including single lithium or lithium polymer cells, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. It features a fixed output voltage of 1.2 V and can deliver up to 800 mA of load current.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.3 | - | 5.5 | V |
| Output Voltage | - | 1.2 | - | V |
| Output Current | - | - | 800 | mA |
| Switching Frequency | 2.6 | 3.0 | 3.4 | MHz |
| Operating Temperature Range | -40 | - | 85 | °C |
| Shutdown Current | 0.2 | - | 1.0 | μA |
| Package Type | - | - | 6-UFBGA, WLCSP | - |
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 (available in ADP2139 model).
- Minimal external part count due to internal power switch and synchronous rectifier.
- Undervoltage lockout to prevent deep battery discharge.
Applications
- PDAs and palmtop computers.
- Wireless handsets.
- Digital audio and portable media players.
- Digital cameras and GPS navigation units.
Q & A
- What is the input voltage range of the ADP2138ACBZ-1.2-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum output current of the ADP2138ACBZ-1.2-R7?
The maximum output current is 800 mA.
- What are the operating modes of the ADP2138ACBZ-1.2-R7?
The device operates in forced PWM mode and automatic PWM/PSM modes depending on the load current level.
- What is the switching frequency of the ADP2138ACBZ-1.2-R7?
The switching frequency is between 2.6 MHz and 3.4 MHz.
- What is the shutdown current of the ADP2138ACBZ-1.2-R7?
The shutdown current is typically 0.2 μA.
- What type of package does the ADP2138ACBZ-1.2-R7 come in?
The device comes in a 6-UFBGA, WLCSP package.
- What are some key applications of the ADP2138ACBZ-1.2-R7?
Key applications include PDAs, wireless handsets, digital audio and media players, and digital cameras.
- Does the ADP2138ACBZ-1.2-R7 have internal protection features?
Yes, it includes current overload and thermal shutdown protections.
- Is the ADP2138ACBZ-1.2-R7 RoHS compliant?
Yes, the device is lead-free and RoHS compliant.
- What design tool supports the ADP2138ACBZ-1.2-R7?
The device is supported by the ADIsimPower™ design tool.
