ADP1873
PRODUCTIONSynchronous Current-Mode Buck Controller with Constant On-time, 0.6 V Reference Voltage, and Power Saving Mode
- Part Models
- 2
- 1ku List Price
- Starting From $1.58
Overview
- Power input voltage as low as 2.75 V to 20 V
- Bias supply voltage range:
2.75 V to 5.5 V - Minimum output voltage: 0.6 V
- 0.6 V reference voltage with ±1.0% accuracy
- Supports all N-channel MOSFET power stages
- Available in 300 kHz, 600 KHz, and 1.0 MHz options
- No current-sense resistor required
- Power saving mode (PSM) for light loads (ADP1873 only)
- Resistor Programmable Current Sense Gain
- Thermal overload protection
- Short-circuit protection
- See data sheet for additional features
The ADP1872 / ADP1873 are versatile current-mode, synchronous step-down controllers that provide superior transient response, optimal stability, and current limit protection by using a constant on-time, pseudo-fixed frequency with a programmable current-sense gain, current-control scheme. In addition, these devices offer optimum performance at low duty cycles by utilizing valley current-mode control architecture. This allows the ADP1872 / ADP1873 to drive all N-channel power stages to regulate output voltages as low as 0.6 V.
The ADP1873 is the power-saving mode (PSM) version of the device and is capable of pulse skipping to maintain output regulation while achieving improved system efficiency at light loads.
Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz), the ADP1872 / ADP1873 are well suited for a wide range of applications. These ICs not only operate from a 2.75 V to 5.5 V bias supply, but also can accept a power input as high as 20 V.
In addition, an internally fixed soft start period is included to limit input in-rush current from the input supply during startup and to provide reverse current protection during soft start for a pre-charged output. The low-side current-sense, current-gain scheme, along with the PSM/forced pulse-width modulation (PWM) option, reduces the external part count and improves efficiency. The ADP1872 / ADP1873 operate over the –40°C to +125°C junction temperature range and are available in a 10-lead MSOP.
APPLICATIONS
- Telecom and networking systems
- Mid to High End servers
- Set-top boxes
- DSP core power supplies
Documentation
Data Sheet 1
User Guide 1
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 |
|---|---|---|---|
| ADP1873ARMZ-0.3-R7 | 10-Lead MSOP | ||
| ADP1873ARMZ-0.6-R7 | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 26, 2016 - 15_0176 Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines |
||
| ADP1873ARMZ-0.3-R7 | PRODUCTION | |
| ADP1873ARMZ-0.6-R7 | PRODUCTION | |
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| ADP1873ARMZ-0.3-R7 | PRODUCTION | |
| ADP1873ARMZ-0.6-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
ADP187x Buck Designer 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
ADP1873 Evaluation Board
Resources
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