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Analog Devices Inc. ADP2503ACPZ-R7
- Part No.:
- ADP2503ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2503ACPZ-R7.pdf
- Description:
- IC REG BCK BST ADJ 600MA 10LFCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADP2503ACPZ-R7 from Analog Devices is a 600 mA, 2.5 MHz synchronous buck-boost DC-to-DC converter in a 10-lead 3 mm × 3 mm LFCSP package, supporting input voltages from 2.3 V to 5.5 V and adjustable output voltage (2.8 V to 5.5 V) via external resistor divider. It features seamless buck/boost/buck-boost mode transition, 38 μA quiescent current, internal compensation, and load disconnect capability - designed for space-constrained portable power rails in USB-powered devices and wireless handsets.
For engineers reviewing the ADP2503ACPZ-R7 datasheet, ADP2503ACPZ-R7 pinout, ADP2503ACPZ-R7 application, or ADP2503ACPZ-R7 equivalent, key selection criteria include its adjustable-output buck-boost topology, 2.5 MHz fixed-frequency operation with PSM option, thermal shutdown at 150°C, SYNC-controlled forced-PWM or external clock synchronization, and compatibility with 1.5 µH inductors for minimal PCB footprint.
Technical Context
The ADP2503ACPZ-R7 implements synchronous average current-mode control across buck, boost, and buck-boost operating regions - automatically switching modes based on VIN/VOUT relationship. Its dual-switch architecture uses internal N- and P-channel MOSFETs (150 mΩ RDS(on) each) and supports true load disconnect in boost configuration.
It integrates soft start (200 μs ramp), undervoltage lockout (UVLO rising threshold 2.20 V), overtemperature protection (150°C trip, 25°C hysteresis), short-circuit protection (1.4 A switch current limit), and reverse current limiting (1.1 A). The FB pin references 500 mV internally, enabling precise output programming with ±2% initial accuracy on fixed-output variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600 mA maximum continuous - sufficient for core logic rails in portable audio players and miniature HDD supplies. |
| Switching Frequency | 2.5 MHz typical - enables use of compact 1.5 µH inductors and reduces output voltage ripple without increasing EMI filtering complexity. |
| Input Voltage Range | 2.3 V to 5.5 V - supports single Li+/LiPo cells, USB 5 V, and multi-cell alkaline/NiMH sources without intermediate regulation. |
| Quiescent Current | 38 μA typical - extends battery life in always-on subsystems such as sensor hubs or low-power MCU peripherals. |
| Feedback Reference | 500 mV ±10 mV - allows accurate output programming from 2.8 V to 5.5 V using standard resistor tolerances (e.g., 1% metal film). |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload or poor PCB thermal design while maintaining safe operation up to +125°C ambient. |
| Package | 10-lead 3 mm × 3 mm LFCSP (QFN) with exposed pad - provides low thermal resistance (θJA = 84°C/W) and high power density for thin-profile handheld designs. |
Pinout & Package
ADP2503ACPZ-R7 is housed in a 10-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP) with exposed thermal pad connected to PGND. The package supports reflow soldering per JEDEC J-STD-020 and offers low profile (1 mm height) for ultra-thin applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output node | Delivers programmed output voltage; requires local 22 µF ceramic capacitor to PGND for stability and transient response. |
| SW2 | Buck-boost switch node 2 | Connects to inductor second terminal; carries high di/dt current in all modes - must be routed with short, wide copper trace. |
| PGND | Power ground reference | Common return for input/output capacitors and power switches; must be tied directly to exposed pad and solid PGND plane. |
| SW1 | Buck-boost switch node 1 | Connects to inductor first terminal; shares same high-frequency current path constraints as SW2. |
| PVIN | Power input supply rail | High-current input path for power switches; requires 10 µF X5R ceramic capacitor placed adjacent to pin. |
| EN | Enable/shutdown control | Active-high logic input; pulls device into <1 µA shutdown state when low - supports system-level power sequencing. |
| SYNC | Mode and frequency control | Selects between PSM (low), forced PWM (high), or external clock sync (2.2–2.8 MHz square wave); enables noise-sensitive RF coexistence. |
| VIN | Analog supply input | Provides bias for internal circuitry; decoupled separately from PVIN to reduce noise coupling into control loop. |
| AGND | Analog ground reference | Reference for error amplifier and feedback network; must be isolated from noisy PGND until joined at single point near PGND pin. |
| FB | Feedback voltage input | Monitors output via resistor divider; 500 mV reference enables precise adjustable output setting without external op-amps. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/boost/buck-boost transition | Maintains regulation across VIN/VOUT crossover without output glitch or mode-hopping artifacts - critical for battery-powered systems with varying cell voltage. |
| Load disconnect in boost mode | Isolates output from input during shutdown or fault conditions - prevents backfeed and enables true system-level power gating. |
| Power save mode (PSM) | Reduces switching frequency under light loads (<75 mA), cutting quiescent losses while retaining fast wake-up response for burst-mode operation. |
| Internal compensation | Eliminates need for external compensation components - simplifies layout, reduces BOM count, and ensures stable loop response across temperature and load. |
| Soft start (200 μs) | Limits inrush current to <600 mA with 20 µF output capacitance - prevents input rail collapse and avoids overstressing input capacitors or source regulators. |
| Synchronization capability | Accepts external 2.2–2.8 MHz clock on SYNC pin - enables deterministic switching timing for EMI reduction and multi-rail phase alignment. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor I/O rails and camera interface circuitry from a single Li+ cell with declining voltage (3.6 V → 2.8 V). IC Role / Device Role / Timing Role: Buck-boost regulator maintaining stable 3.3 V output despite input sag below VOUT, enabling uninterrupted data transfer and display refresh. Use Value: Eliminates need for separate buck and boost stages, reducing solution size by >40% and component count by 7 parts versus discrete implementation. |
Use Scenario: Supplying image sensor analog front-end and flash LED driver from USB 5 V or battery with variable load profiles. IC Role / Device Role / Timing Role: Adjustable-output buck-boost delivering 2.8 V to 4.5 V with tight line/load regulation and low noise during exposure capture. Use Value: Supports multiple sensor voltage requirements using one IC variant, avoiding redesign when upgrading to higher-voltage sensors. |
| USB-Powered Peripherals | Miniature Hard Disk Drives |
Use Scenario: Providing regulated 3.3 V or 5.0 V to embedded microcontrollers and USB transceivers in bus-powered dongles and adapters. IC Role / Device Role / Timing Role: Input-capable buck-boost converting USB 5 V down or up as needed for mixed-voltage SoC domains, with load disconnect preventing backfeed. Use Value: Enables compliance with USB power budget limits while supporting legacy 5 V peripherals and modern 3.3 V logic simultaneously. |
Use Scenario: Generating 5 V spindle motor drive and 3.3 V logic supply from a 3.3 V host interface in ultra-compact 1.8″ HDD modules. IC Role / Device Role / Timing Role: High-efficiency buck-boost delivering 600 mA at >85% efficiency across full input range, with thermal shutdown protecting against mechanical stall conditions. Use Value: Replaces two discrete regulators and associated passives, saving >25 mm² PCB area and improving reliability through integrated protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | 2.5 V–6.0 V input, 600 mA, 2.4 MHz, 1.2 mm height, no load disconnect | Lacks true load disconnect and has higher quiescent current (25 μA vs. 38 μA in PSM) | Preferred where board height is tighter than 1 mm and load isolation is not required. |
| MAX77827AEWA+ | 2.5 V–5.5 V input, 1.2 A, 2.0 MHz, 1.1 mm height, integrated enable delay | Higher current rating but larger package (12-bump WLP), no SYNC pin for external clock sync | Selected when >600 mA peak load is expected and board space permits larger footprint. |
Compared with TPS63020DSJR and MAX77827AEWA+, the ADP2503ACPZ-R7 uniquely combines 1 mm profile, load disconnect, SYNC-based EMI control, and 38 μA quiescent current - making it optimal for ultra-thin, noise-sensitive, battery-critical portable designs requiring flexible input/output voltage relationships.
Availability
ADP2503ACPZ-R7 is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, and USB-powered peripherals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADP2503ACPZ-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 precision instrumentation, industrial automation, communications, and automotive markets since 1965.
The ADP2503ACPZ-R7 belongs to Analog Devices' high-efficiency, low-noise DC-to-DC converter product line - engineered specifically for portable and battery-operated applications demanding compact size, wide input range, and seamless voltage conversion without performance trade-offs.
FAQ
What is the output voltage range supported by the ADP2503ACPZ-R7?
The ADP2503ACPZ-R7 is an adjustable-output buck-boost converter with a programmable output voltage range of 2.8 V to 5.5 V, set via an external resistor divider connected to the FB pin. Its internal 500 mV feedback reference enables precise output setting using standard resistor values, and it maintains regulation even when input voltage crosses above or below the output level - a key advantage over fixed-output-only alternatives.
Does the ADP2503ACPZ-R7 support load disconnect functionality?
Yes, the ADP2503ACPZ-R7 supports true load disconnect in boost mode: when EN is pulled low or during fault conditions, internal PMOS switches isolate the VOUT node from PVIN, preventing backfeed and enabling clean system-level power-down. This feature is confirmed in the General Description and Pin Function Descriptions sections of the Rev. F datasheet and is distinct from simple shutdown - it actively breaks the power path to the load.
What is the recommended inductor value for the ADP2503ACPZ-R7?
Analog Devices recommends a 1.5 µH inductor for the ADP2503ACPZ-R7 to optimize efficiency and minimize size, leveraging its 2.5 MHz switching frequency. Inductor values between 1.0 µH and 1.5 µH are acceptable, with a maximum of 2.0 µH to ensure loop stability. The datasheet lists specific part numbers from Toko, Murata, TDK, Coilcraft, and Taiyo Yuden - all rated for ≥1.5 A saturation current and low DCR to maintain >85% efficiency at full 600 mA load.
How does the SYNC pin affect the operation of the ADP2503ACPZ-R7?
The SYNC pin on the ADP2503ACPZ-R7 enables three distinct operating modes: (1) low = automatic PSM/PWM transition for best light-load efficiency; (2) high = forced fixed-frequency 2.5 MHz PWM for EMI-sensitive applications; (3) AC-coupled 2.2–2.8 MHz square wave = external clock synchronization. Each mode is electrically validated in the datasheet's SYNC Function section and affects both switching behavior and noise spectrum - critical for RF coexistence in wireless handsets.
What thermal protection features does the ADP2503ACPZ-R7 include?
The ADP2503ACPZ-R7 incorporates overtemperature protection with a 150°C junction trip threshold and 25°C hysteresis, ensuring reliable shutdown during sustained overload or inadequate PCB heat sinking. Thermal shutdown is explicitly verified in the Absolute Maximum Ratings and Theory of Operation sections, and recovery occurs only after junction temperature falls below ~125°C - preventing thermal cycling and guaranteeing safe operation across −40°C to +125°C ambient conditions.
ADP2503ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-LFCSP-WD (3x3)
ADP2503ACPZ-R7 FAQ
1.How can I place an order for ADP2503ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2503ACPZ-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 ADP2503ACPZ-R7 reliable?
The price and inventory of ADP2503ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2503ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2503ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2503ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2503ACPZ-R7?
ADP2503ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2503ACPZ-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 ADP2503ACPZ-R7?
For technical support, including ADP2503ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2503ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2503ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2503ACPZ-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 ADP2503ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2503ACPZ-R7?
All ADP2503ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2503ACPZ-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 ADP2503ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2503ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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