ADP2311
PRODUCTIONDual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring
- Part Models
- 4
- 1ku List Price
- Starting From $3.23
Overview
- Input voltage: 4.5 V to 18 V
- ±1.0% output accuracy
- Integrated MOSFET: 110 mΩ/60 mΩ typical
- Continuous output current: 1 A/1 A
- Power fail comparator generates warning
- Power-on reset with programmable delay timer
- Adjustable voltage monitor for power-down (Channel 2)
- Watchdog refresh input
- Dual phase with 180° out-of-phase operation
- Fixed switching frequency: 300 kHz
- Internal compensation and soft start
- Stable with low ESR output ceramic capacitors
- Precision enable input
- Power feedback during power-off
- UVLO, OCP, OVP, and thermal shutdown protection
The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current.
The ADP2311 integrates the high-side and low-side MOSFETs to provide a very high efficiency, compact solution. Both channels of the regulator run at 180° out of phase to reduce the input ripple current and the input capacitor size, thereby helping to lower system electromagnetic interference (EMI). The ADP2311 also integrates internal compensation and soft start circuitry to simplify the design.
An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. Accurate voltage monitoring circuitry and a power fail comparator provide a controlled power-up and power-down sequence to enhance system reliability.
The ADP2311 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).
The ADP2311 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead LFCSP package.
Applications
- Industrial and instrumentation
- Healthcare and medical
- DC-to-DC point of load applications
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 |
|---|---|---|---|
| ADP2311ACPZ-1-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| ADP2311ACPZ-2-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| ADP2311ACPZ-3-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| ADP2311ACPZ-4-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 25, 2025 - 25_0054 Gold wire to Copper wire Conversion (Notification) |
||
| ADP2311ACPZ-1-R7 | PRODUCTION | |
| ADP2311ACPZ-4-R7 | PRODUCTION | |
|
Feb 6, 2017 - 16_0234 Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts. |
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| ADP2311ACPZ-1-R7 | PRODUCTION | |
| ADP2311ACPZ-2-R7 | PRODUCTION | |
| ADP2311ACPZ-3-R7 | PRODUCTION | |
| ADP2311ACPZ-4-R7 | PRODUCTION | |
|
May 29, 2014 - 14_0136 Assembly and Test Transfer of Select 4x4 and 5x5 mm LFCSP Products to STATS ChipPAC China |
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| ADP2311ACPZ-1-R7 | PRODUCTION | |
| ADP2311ACPZ-2-R7 | PRODUCTION | |
| ADP2311ACPZ-3-R7 | PRODUCTION | |
| ADP2311ACPZ-4-R7 | PRODUCTION | |
|
Nov 12, 2013 - 13_0230 Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China |
||
| ADP2311ACPZ-1-R7 | PRODUCTION | |
| ADP2311ACPZ-2-R7 | PRODUCTION | |
| ADP2311ACPZ-3-R7 | PRODUCTION | |
| ADP2311ACPZ-4-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- ADP2311
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
ADP2311 Evaluation Board