ADP2105
PRODUCTION1 Amp Synchronous, Step-Down DC-to-DC Converter
- Part Models
- 3
- 1ku List Price
- Starting From $1.72
Overview
- Extremely high 97% efficiency
- Ultralow quiescent current: 20 μA
- 1.2 MHz switching frequency
- 0.1 μA shutdown supply current
- Maximum load current: 1 A
- Input voltage: 2.7 V to 5.5 V
- Output voltage: 0.8 V to VIN
- Maximum duty cycle: 100%
- Smoothly transitions into low dropout (LDO) mode
- Internal synchronous rectifier
- Small 16-lead 4 mm × 4 mm LFCSP package
- Optimized for small ceramic output capacitors
- Enable/shutdown logic input
- Undervoltage lockout
- Soft start
The ADP2105 / ADP2106 / ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP package. At medium to high load currents, these devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2105 / ADP2106 / ADP2107 use a pulse frequency modulation (PFM) control scheme under light load conditions that reduces switching frequency to save power.
The ADP2105 / ADP2106 / ADP2107 run from input voltages of 2.7 V to 5.5 V, allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cells, PCMCIA, and other standard power sources. The output voltage of ADP2105 / ADP2106 / ADP2107 is adjustable from 0.8 V to the input voltage (indicated by ADJ), whereas the ADP2105 / ADP2106 / ADP2107 are available in preset output voltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 V (indicated by x.x V). Each of these variations is available in three maximum current levels: 1 A (ADP2105), 1.5 A (ADP2106), and 2 A (ADP2107). The power switch and synchronous rectifier are integrated for minimal external part count and high efficiency. During logic controlled shutdown, the input is disconnected from the output, and it draws less than 0.1 µA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and programmable soft start to limit inrush current at startup.
Applications
- Mobile handsets
- PDAs and palmtop computers
- Telecommunication/networking equipment
- Set top boxes
- Audio/video consumer electronics
Documentation
Data Sheet 1
Application Note 1
Evaluation Design File 1
Power Reference Designs 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADP2105ACPZ-1.2-R7 | 16-Lead LFCSP (4mm x 4mm x 0.85mm w/ EP) | ||
| ADP2105ACPZ-1.8-R7 | 16-Lead LFCSP (4mm x 4mm x 0.85mm w/ EP) | ||
| ADP2105ACPZ-3.3-R7 | 16-Lead LFCSP (4mm x 4mm x 0.85mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 22, 2012 - 12_0063 Conversion of Select Sizes of LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE-Korea. |
||
| ADP2105ACPZ-1.2-R7 | PRODUCTION | |
| ADP2105ACPZ-1.8-R7 | PRODUCTION | |
| ADP2105ACPZ-3.3-R7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| ADP2105ACPZ-1.2-R7 | PRODUCTION | |
| ADP2105ACPZ-1.8-R7 | PRODUCTION | |
| ADP2105ACPZ-3.3-R7 | PRODUCTION | |
|
Feb 15, 2010 - 07_0061 LFCSP Package Manufacturing Line Transfer from Amkor Korea to Amkor PRC |
||
| ADP2105ACPZ-3.3-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| ADP2120 | PRODUCTION | 1.25A, 1.2MHz Synchronous Step-Down DC-to-DC Regulator |
Tools & Simulations
ADP21xx Buck Regulator Design Tool
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Open ToolEvaluation Kits
ADP2105 Evaluation Board
Resources
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