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Analog Devices Inc. ADP2503ACPZ-4.5-R7
- Part No.:
- ADP2503ACPZ-4.5-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2503ACPZ-4.5-R7.pdf
- Description:
- IC REG BUCK BOOST 4.5V 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
ADP2503ACPZ-4.5-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, delivering fixed 4.5 V output from 2.3 V–5.5 V input. It features seamless buck/boost/buck-boost mode transition, 38 µA quiescent current, and integrated power switches for compact portable power rails in USB-powered devices and wireless handsets.
For engineers reviewing the ADP2503ACPZ-4.5-R7 datasheet, ADP2503ACPZ-4.5-R7 pinout, ADP2503ACPZ-4.5-R7 application, or ADP2503ACPZ-4.5-R7 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives with functional distinctions, and supply-ready availability details - all grounded in Analog Devices' Rev. F datasheet and official ordering guide.
Technical Context
The ADP2503ACPZ-4.5-R7 implements synchronous average current-mode control with internal N- and P-channel MOSFETs (150 mΩ RDS(on) each), enabling operation across buck, boost, and buck-boost modes depending on VIN vs. VOUT. Its 2.5 MHz oscillator supports forced PWM, power-save mode (PSM), and external synchronization via the SYNC pin.
It integrates soft start (200 µs ramp), undervoltage lockout (UVLO rising threshold 2.20 V), overtemperature shutdown (150°C), short-circuit protection (1.0–1.4 A switch current limit), and true load disconnect in boost configuration. Feedback voltage is fixed at 500 mV for the 4.5 V variant, with ±2% initial output accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600 mA maximum continuous - sufficient to power baseband processors or RF front-ends in compact handhelds without external current boosting. |
| Input Voltage Range | 2.3 V to 5.5 V - supports single Li+/Li-Po cells, dual alkaline/NiMH, USB 5 V, and PCMCIA sources without pre-regulation. |
| Fixed Output Voltage | 4.5 V ±2% - precisely regulated for analog subsystems or high-efficiency PMIC rails requiring stable mid-range bias. |
| Switching Frequency | 2.5 MHz typical - enables use of 1.5 µH inductors and small ceramic capacitors, minimizing solution footprint and EMI. |
| Quiescent Current | 38 µA typical - extends battery life in always-on sensor nodes or standby circuits where low IQ directly impacts runtime. |
| Package | 10-lead 3 mm × 3 mm LFCSP (CP-10-9) with exposed pad - provides low thermal resistance (θJA = 84°C/W) and high power density for space-constrained PCBs. |
| Protection Features | UVLO, thermal shutdown (150°C), short-circuit limit (1.0–1.4 A), reverse current limit (1.1 A), and load disconnect - ensures robustness in unregulated battery environments. |
Pinout & Package
ADP2503ACPZ-4.5-R7 uses a 10-lead 3 mm × 3 mm LFCSP (CP-10-9) package with an exposed thermal pad connected to PGND. The package supports high-density layouts and efficient heat dissipation via the exposed pad soldered to a dedicated PGND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output node | Delivers fixed 4.5 V; requires low-ESR ceramic capacitor (≥22 µF) between VOUT and PGND for stability and transient response. |
| SW2 (Pin 2) | Buck-boost power switch node 2 | Connects to inductor; carries high di/dt switching current in boost and buck-boost modes - must be routed with short, wide copper. |
| PGND (Pin 3) | Power ground reference | Return path for input/output capacitors and power switches; must tie directly to exposed pad and solid PGND plane to minimize noise and thermal rise. |
| SW1 (Pin 4) | Buck-boost power switch node 1 | Connects to same inductor as SW2; active during buck and buck-boost phases - shared inductor simplifies layout but demands careful routing separation from sensitive analog nodes. |
| PVIN (Pin 5) | Main power input to switches | Supplies internal power switches only; requires local 10 µF X5R/X7R ceramic capacitor to suppress high-frequency ripple and supply transient current. |
| EN (Pin 6) | Enable/shutdown logic input | Active-high control: logic high ≥1.2 V enables regulation with soft start; logic low ≤0.4 V disables device, reducing input current to <1 µA. |
| SYNC (Pin 7) | Mode selection and clock sync input | Drives low → enters PSM; high → forces fixed 2.5 MHz PWM; AC-coupled 2.2–2.8 MHz clock → synchronizes switching frequency to external source. |
| VIN (Pin 8) | Analog supply for control circuitry | Provides bias for internal error amplifier, oscillator, and logic - must be decoupled with 0.1 µF ceramic capacitor close to pin. |
| AGND (Pin 9) | Analog ground reference | Separate ground for precision feedback and control circuitry; must connect to PGND at single point near IC to avoid noise coupling into FB path. |
| FB (Pin 10) | Feedback input | Internally tied to VOUT for fixed 4.5 V version; not user-adjustable - eliminates external resistor divider and reduces BOM count and layout sensitivity. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/boost/buck-boost transition | Maintains regulation without output glitch when input crosses 4.5 V - critical for battery-powered systems where VIN drops from 4.8 V to 3.2 V during discharge. |
| Power save mode (PSM) | Reduces switching frequency under light loads (<75 mA), cutting quiescent loss while preserving fast wake-up - extends runtime in intermittent-sensing applications. |
| True load disconnect in boost mode | Isolates output from input during shutdown, preventing backfeed and enabling safe hot-swap or rail sequencing in multi-rail systems. |
| Internal compensation | Eliminates need for external compensation network - reduces component count, board area, and tuning effort while guaranteeing stability with recommended 1.5 µH inductor and 22 µF output cap. |
| Soft start (200 µs) | Limits inrush current to <600 mA with 20 µF output capacitor - prevents input voltage sag and avoids tripping upstream current limits in battery or USB-supplied designs. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies from a single Li+ cell with varying voltage (4.2 V → 3.0 V). IC Role / Device Role / Timing Role: Buck-boost regulator providing stable 4.5 V output regardless of input droop, enabling uninterrupted RF transmission and digital signal processing. Use Value: Eliminates need for separate buck and boost converters, reducing solution size by >30% and simplifying power architecture in ultra-thin handset form factors. |
Use Scenario: Supplying image sensor analog core and lens actuator drivers from USB 5 V or internal Li+ battery. IC Role / Device Role / Timing Role: Efficient mid-rail generation with fast transient response to handle burst-mode sensor readout and autofocus motor pulses. Use Value: 2.5 MHz switching minimizes output voltage ripple during high-current lens movement, preventing image artifacts and focus jitter. |
| USB-Powered Peripherals | Miniature Hard Disk Drives |
Use Scenario: Providing clean 4.5 V rail to USB-C audio DACs, HID controllers, or embedded microcontrollers drawing up to 500 mA. IC Role / Device Role / Timing Role: Regulator with load disconnect and low IQ, ensuring compliance with USB suspend current limits (<2.5 mA) and preventing backfeed into host port. Use Value: Shutdown current <1 µA meets USB Battery Charging v1.2 deep-sleep requirements, extending peripheral battery life during host sleep states. |
Use Scenario: Generating 4.5 V spindle motor drive and servo control voltage from 5 V USB or 3.3 V system rail in portable SSD enclosures. IC Role / Device Role / Timing Role: High-efficiency buck-boost converter supporting wide input range and delivering tight load regulation during rapid motor acceleration/deceleration. Use Value: Seamless mode transition avoids output dip during motor startup, preventing data corruption and improving drive reliability under dynamic load conditions. |
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 | 600 mA, 2.5 V–5.5 V input, adjustable/fixed outputs (including 4.5 V), 2.4 MHz switching, 25 µA IQ, 10-pin WSON (3×3 mm). | Lower quiescent current but no true load disconnect; requires external compensation; lacks SYNC-driven forced PWM mode. | Preferred where lowest IQ dominates and load isolation is unnecessary; verify loop stability with target inductor/capacitor set. |
| MAX77827BEWC+T | 600 mA, 2.5 V–5.5 V input, fixed 4.5 V option, 2.2 MHz switching, 30 µA IQ, 12-pin WLP (2.13×1.43 mm), integrated enable and power-good. | Smaller footprint but higher thermal resistance (θJA ≈ 120°C/W); no SYNC pin; limited peak current headroom (1.2 A switch limit). | Selected for ultra-compact wearables where board area is critical and thermal derating can be managed via layout; not suitable for sustained 600 mA loads in enclosed environments. |
Compared with TPS63020DSJR and MAX77827BEWC+T, ADP2503ACPZ-4.5-R7 uniquely combines true load disconnect, three-mode SYNC control (PSM/PWM/sync), and guaranteed 600 mA delivery in a thermally optimized LFCSP - making it optimal for USB peripherals and battery-powered imaging systems demanding both efficiency and robustness.
Availability
ADP2503ACPZ-4.5-R7 is available at Aetrix Electronics and suitable for wireless handsets, USB-powered peripherals, and miniature hard disk drives requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ADP2503ACPZ-4.5-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The ADP2503/ADP2504 product line was designed specifically for space-constrained, battery-operated portable electronics requiring high-efficiency, wide-input buck-boost regulation with minimal external components and robust protection.
FAQ
What is the output voltage tolerance of the ADP2503ACPZ-4.5-R7?
The ADP2503ACPZ-4.5-R7 has a fixed output voltage of 4.5 V with ±2% initial accuracy over temperature and line/load conditions, as specified in the Rev. F datasheet Table 1. This tolerance is achieved using an internal 500 mV feedback reference and factory-trimmed resistive divider, eliminating drift from external components.
Does the ADP2503ACPZ-4.5-R7 support external synchronization?
Yes, the ADP2503ACPZ-4.5-R7 supports external synchronization via its SYNC pin. When driven with a 2.2 MHz–2.8 MHz square wave having ≥160 ns minimum off time, the ADP2503ACPZ-4.5-R7 locks its switching frequency to the external clock - enabling noise-sensitive systems to avoid interference bands or align multiple converters.
Can the ADP2503ACPZ-4.5-R7 operate from a single-cell Li+ battery?
Yes, the ADP2503ACPZ-4.5-R7 operates from 2.3 V to 5.5 V input, fully covering the discharge curve of a single Li+ or Li-polymer cell (4.2 V down to ~2.8 V). Its buck-boost architecture maintains regulated 4.5 V output even as the cell voltage falls below 4.5 V, ensuring uninterrupted operation until cutoff.
What protection features does the ADP2503ACPZ-4.5-R7 include?
The ADP2503ACPZ-4.5-R7 includes undervoltage lockout (UVLO), overtemperature shutdown (150°C), short-circuit protection (1.0–1.4 A switch current limit), reverse current limiting (1.1 A), and true load disconnect in boost mode. These features protect both the IC and downstream circuitry during fault conditions and battery depletion.
Is the ADP2503ACPZ-4.5-R7 pin-compatible with other members of the ADP2503/ADP2504 family?
Yes, all ADP2503 and ADP2504 variants - including ADP2503ACPZ-4.5-R7, ADP2503ACPZ-3.3-R7, and ADP2504ACPZ-5.0-R7 - share identical 10-lead 3 mm × 3 mm LFCSP (CP-10-9) packaging and pinout. Only the output voltage and current rating differ; no PCB redesign is needed when upgrading within the same current class.
ADP2503ACPZ-4.5-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- 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-4.5-R7 FAQ
1.How can I place an order for ADP2503ACPZ-4.5-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2503ACPZ-4.5-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-4.5-R7 reliable?
The price and inventory of ADP2503ACPZ-4.5-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-4.5-R7 is usually 5 days.
3.What payment methods are accepted for ADP2503ACPZ-4.5-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2503ACPZ-4.5-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2503ACPZ-4.5-R7?
ADP2503ACPZ-4.5-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2503ACPZ-4.5-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-4.5-R7?
For technical support, including ADP2503ACPZ-4.5-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2503ACPZ-4.5-R7 requirements.
6.How does Aetrix verify that ADP2503ACPZ-4.5-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2503ACPZ-4.5-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-4.5-R7 meets industry standards.
7.What is the process for return or replacement of ADP2503ACPZ-4.5-R7?
All ADP2503ACPZ-4.5-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2503ACPZ-4.5-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-4.5-R7 part is unused and in its original packaging.
Return procedure for ADP2503ACPZ-4.5-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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