My Inquiry
My Account
Analog Devices Inc. ADP2311ACPZ-1-R7
- Part No.:
- ADP2311ACPZ-1-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2311ACPZ-1-R7.pdf
- Description:
- IC REG BUCK ADJ 1A DL 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:741
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADP2311ACPZ-1-R7 from Analog Devices is a dual-channel, synchronous step-down DC/DC regulator with integrated 110 mΩ/60 mΩ MOSFETs per channel, supporting 4.5 V to 18 V input and delivering up to 1 A per output down to 0.6 V. It features fail-safe voltage monitoring via PFI/PFO and VM2 inputs, power-on reset with programmable delay, and watchdog timer functionality. It is used in industrial instrumentation and medical point-of-load systems requiring coordinated dual-rail sequencing and fault-aware power management.
For engineers reviewing the ADP2311ACPZ-1-R7 datasheet, ADP2311ACPZ-1-R7 pinout, ADP2311ACPZ-1-R7 application, or ADP2311ACPZ-1-R7 equivalent, key selection considerations include dual-phase 180° out-of-phase operation for reduced input ripple, ±1.0% output accuracy over −40°C to +125°C, integrated soft start (1.7 ms), and fail-safe monitoring with independent power-fail and voltage-monitor comparators.
Technical Context
The ADP2311ACPZ-1-R7 implements fixed-frequency (300 kHz typical) current-mode PWM control with internal slope compensation and anti-cross conduction protection. Each channel integrates high-side and low-side MOSFETs, bootstrap regulators (5 V BSTx–SWx), and dedicated current-sense paths for peak-current limiting (2 A typical high-side, 2.6 A typical low-side source).
It embeds system-level reliability functions: a precision enable input with 1.28 V rising threshold, open-drain POR and PFO outputs with hysteresis, VM2-triggered Channel 2 shutdown, and a watchdog timer with four selectable timeout options (41–233 ms). Power-up sequencing is controlled by the TIMER pin configuration, supporting capacitor-only, RC, or floating modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial input rails including 12 V and 15 V bus systems. |
| Output Current per Channel | 1 A continuous - sufficient for FPGA I/O banks, microcontroller cores, and sensor signal chains. |
| Feedback Accuracy | ±1.0% over −40°C to +125°C - ensures stable regulation across automotive and industrial temperature extremes. |
| Switching Frequency | 300 kHz (250–350 kHz range) - balances EMI performance and inductor size for compact designs. |
| MOSFET RDS(ON) | 110 mΩ (high-side), 60 mΩ (low-side) - enables >90% efficiency at 1 A, 12 VIN/3.3 VOUT. |
| Soft Start Time | 1.7 ms (512 clock cycles) - limits inrush current during cold start without external components. |
| Watchdog Timeout Options | 41 ms / 83 ms / 125 ms / 167 ms - configurable via TIMER pin to match host processor reset timing requirements. |
Pinout & Package
ADP2311ACPZ-1-R7 is housed in a 24-lead LFCSP_WQ (4 mm × 4 mm, 0.5 mm pitch) with exposed pad soldered to GND for thermal performance (θJA = 36.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Analog ground reference | Low-noise return path for feedback and control circuits; must connect to solid ground plane. |
| VREG (Pin 2) | Internal 5 V regulator output | Powers internal logic and gate drivers; requires 1 µF ceramic bypass to GND. |
| POR (Pin 6) | Power-on reset open-drain output | Signals valid output regulation (95–96.5% of VFB) after programmable delay; needs external pull-up. |
| FB1 / FB2 (Pins 24 / 7) | Output voltage feedback sense | Resistor-divider inputs setting VOUT1/VOUT2; 0.6 V reference enables 0.6 V to 5 V adjustable outputs. |
| PFI / PFO (Pins 4 / 5) | Power-fail monitor input/output | PFI senses input rail decay; PFO asserts open-drain warning before brownout (0.591–0.609 V threshold). |
| VM2 (Pin 23) | Channel 2 voltage monitor input | Triggers graceful shutdown of Channel 2 when PVIN2 falls below 0.6 V threshold. |
| WDI / RSTO (Pins 9 / 8) | Watchdog input/output | WDI accepts ≥80 ns pulses; RSTO asserts open-drain reset if WDI stalls beyond configured timeout. |
| EN (Pin 22) | Precision enable input | 1.28 V rising threshold allows resistor-divider UVLO programming; 5 µA internal pull-down ensures default disable. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase 180° out-of-phase operation | Halves input ripple current vs. single-phase, reducing CIN size and system EMI emissions. |
| Integrated bootstrap regulators | Generates 5 V gate drive for high-side MOSFETs (BST1/SW1, BST2/SW2); requires only 0.1 µF X7R ceramic per channel. |
| Programmable POR delay | Configurable via TIMER pin (capacitor-only, RC, or floating) to coordinate startup with downstream logic or memory. |
| Hiccup-mode overcurrent protection | Enters 4096-cycle recovery cycle upon repeated current-limit faults, preventing thermal runaway during sustained overload. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction; restarts only after cooling by 15°C, avoiding oscillation near thermal limit. |
Applications
| Industrial Instrumentation | Medical Point-of-Load |
|---|---|
Use Scenario: Dual-rail power for precision ADC/DAC signal chains in portable analyzers and patient monitors. IC Role / Device Role / Timing Role: Provides isolated, sequenced 3.3 V and 1.8 V supplies with POR coordination and power-fail warning to preserve data integrity during battery depletion. Use Value: Prevents data corruption by triggering controlled shutdown before supply collapse, enabled by independent VM2 monitoring on Channel 2. |
Use Scenario: Power management for embedded microcontrollers and wireless transceivers in Class II medical devices. IC Role / Device Role / Timing Role: Delivers regulated 5 V (Channel 1) and 3.3 V (Channel 2) with watchdog supervision to ensure MCU responsiveness during critical operation. Use Value: Guarantees safe reset via RSTO if firmware hangs, while PFO alerts host controller of impending input failure for emergency save routines. |
| Automotive Test Equipment | Industrial PLC I/O Modules |
Use Scenario: Power conversion in handheld diagnostic tools operating from 12 V vehicle batteries with wide transient tolerance. IC Role / Device Role / Timing Role: Regulates stable 3.3 V and 5 V rails despite cold-crank (4.5 V) and load-dump (18 V) conditions; UVLO and OVP protect against bus anomalies. Use Value: Maintains operation across automotive voltage extremes while providing fail-safe monitoring to prevent erroneous measurements during brownouts. |
Use Scenario: Distributed power for isolated digital I/O channels in modular PLC backplanes. IC Role / Device Role / Timing Role: Supplies 5 V logic and 3.3 V interface rails with synchronized soft start and dual-channel POR to ensure deterministic boot across multiple modules. Use Value: Eliminates need for external sequencing ICs-reduces BOM count and layout area while guaranteeing reliable multi-rail initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54202HRTET | Single-channel, 2 A output; no integrated VM2/PFI monitoring or watchdog; 500 kHz switching. | Lacks dual-rail coordination, POR sequencing, and fail-safe comparators-requires external circuitry for equivalent safety functions. | Choose when only one regulated rail is needed and cost sensitivity outweighs system-level reliability features. |
| MP2491DD-LF-Z | Dual-channel, 1.2 A/channel; no integrated watchdog or programmable POR; fixed 500 kHz frequency; no VM2 input. | Supports basic dual-rail conversion but omits power-fail warning, voltage monitor shutdown, and reset timing flexibility. | Select for simpler, lower-cost dual-buck applications where coordinated sequencing and fault signaling are not required. |
Compared with TPS54202HRTET and MP2491DD-LF-Z, the ADP2311ACPZ-1-R7 uniquely integrates dual-channel sequencing, fail-safe monitoring (PFI/PFO/VM2), and watchdog reset in a single 24-pin LFCSP-enabling compact, safety-compliant designs without external supervisors or timers.
Availability
ADP2311ACPZ-1-R7 is available at Aetrix Electronics and suitable for industrial instrumentation, medical point-of-load, and automotive test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADP2311ACPZ-1-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The ADP2311ACPZ-1-R7 belongs to Analog Devices' ADP23xx family of highly integrated dual-output DC/DC regulators, designed specifically for space-constrained, reliability-critical applications demanding coordinated power sequencing and built-in fault detection.
FAQ
What is the maximum input voltage rating for the ADP2311ACPZ-1-R7?
The ADP2311ACPZ-1-R7 has an absolute maximum input voltage rating of +20 V on PVIN1 and PVIN2 pins, but its specified operational input range is 4.5 V to 18 V. Operating above 18 V may trigger overvoltage protection (OVP), and sustained exposure beyond 20 V risks permanent damage per Absolute Maximum Ratings.
How does the ADP2311ACPZ-1-R7 implement dual-channel phase interleaving?
The ADP2311ACPZ-1-R7 runs Channel 1 and Channel 2 at 180° out-of-phase using internal clock synchronization. This reduces total input ripple current by ~50%, allowing smaller input capacitors and lower EMI. The interleaving is fixed and requires no external configuration.
Can the ADP2311ACPZ-1-R7 operate with only one output enabled?
Yes - the ADP2311ACPZ-1-R7 supports independent channel enable/disable via the EN pin and internal logic. When EN is asserted, both channels activate; however, Channel 2 can be disabled independently using the VM2 comparator or by grounding its FB2 node, while Channel 1 remains active if FB1 is properly biased.
What is the purpose of the TIMER pin on the ADP2311ACPZ-1-R7?
The TIMER pin configures the power-on reset (POR) delay and enables watchdog timer selection. With a capacitor to GND, it sets POR delay; with an RC network, it adds watchdog timeout selection; when floating, it defaults to 1.7 ms POR delay and the shortest watchdog option (41 ms).
Does the ADP2311ACPZ-1-R7 require external compensation components?
No - the ADP2311ACPZ-1-R7 features fully internal compensation. Its current-mode architecture with integrated slope compensation eliminates the need for external Type II or Type III compensation networks, simplifying design and reducing bill-of-materials count.
ADP2311ACPZ-1-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 1A
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP (4x4)
ADP2311ACPZ-1-R7 FAQ
1.How can I place an order for ADP2311ACPZ-1-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2311ACPZ-1-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADP2311ACPZ-1-R7 reliable?
The price and inventory of ADP2311ACPZ-1-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2311ACPZ-1-R7 is usually 5 days.
3.What payment methods are accepted for ADP2311ACPZ-1-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2311ACPZ-1-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2311ACPZ-1-R7?
ADP2311ACPZ-1-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2311ACPZ-1-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADP2311ACPZ-1-R7?
For technical support, including ADP2311ACPZ-1-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2311ACPZ-1-R7 requirements.
6.How does Aetrix verify that ADP2311ACPZ-1-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2311ACPZ-1-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADP2311ACPZ-1-R7 meets industry standards.
7.What is the process for return or replacement of ADP2311ACPZ-1-R7?
All ADP2311ACPZ-1-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2311ACPZ-1-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADP2311ACPZ-1-R7 part is unused and in its original packaging.
Return procedure for ADP2311ACPZ-1-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP2311ACPZ-1-R7 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
