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Analog Devices Inc. ADP2503ACPZ-3.3-R7
- Part No.:
- ADP2503ACPZ-3.3-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2503ACPZ-3.3-R7.pdf
- Description:
- IC REG BUCK BOOST 3.3V 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
ADP2503ACPZ-3.3-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 3.3 V output from input voltages between 2.3 V and 5.5 V. 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-3.3-R7 datasheet, ADP2503ACPZ-3.3-R7 pinout, ADP2503ACPZ-3.3-R7 application, or ADP2503ACPZ-3.3-R7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options with functional distinctions, and supply-ready availability details for production planning.
Technical Context
The ADP2503ACPZ-3.3-R7 implements synchronous average current-mode control with integrated N- and P-channel MOSFETs (150 mΩ RDS(on) each), enabling operation across buck, boost, and buck-boost topologies depending on VIN vs. VOUT relationship. Its 2.5 MHz switching frequency supports compact 1.5 µH inductors and minimizes output voltage ripple without external compensation components.
It integrates undervoltage lockout (2.20 V rising threshold), thermal shutdown (150°C), short-circuit protection (1.4 A switch current limit), and reverse current limiting (1.1 A), while offering three SYNC modes: auto PSM for light-load efficiency, forced PWM for EMI-sensitive systems, and external clock synchronization (2.2–2.8 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600 mA max continuous - supports moderate-power digital subsystems without external current boosting. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li-ion/Li-poly, dual alkaline/NiMH, USB 5 V, and PCMCIA sources. |
| Fixed Output Voltage | 3.3 V ±2% initial accuracy - directly powers 3.3 V logic, RF front-ends, and sensor interfaces without feedback resistor network. |
| Switching Frequency | 2.5 MHz typical - enables use of small 1.5 µH inductors and reduces output capacitor requirements (e.g., 22 µF X5R). |
| Quiescent Current | 38 µA typical - extends battery life in always-on or low-duty-cycle portable applications. |
| Shutdown Current | 0.2 µA typical - ensures near-zero drain during system sleep or standby states. |
| Package | 10-lead 3 mm × 3 mm LFCSP (QFN) with exposed pad - provides low thermal resistance (θJA = 84°C/W) and compact PCB footprint. |
Pinout & Package
ADP2503ACPZ-3.3-R7 uses a 10-lead 3 mm × 3 mm LFCSP (CP-10-9) package with an exposed thermal pad connected to PGND. The pinout is optimized for high-frequency switching layout: SW1 and SW2 require short, wide traces to the inductor; PVIN and VOUT demand local bulk capacitance; AGND and PGND are separated internally but must be joined externally at the exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output node | Delivers fixed 3.3 V; connect 22 µF ceramic capacitor directly to PGND for stability and transient response. |
| SW2 (Pin 2) | Boost-side switch node | Connects to inductor's "input" side in boost/buck-boost modes; carries high di/dt - requires shortest possible trace. |
| PGND (Pin 3) | Power ground return | Common return for input/output capacitors and exposed pad; must be low-impedance plane to minimize noise and thermal rise. |
| SW1 (Pin 4) | Buck-side switch node | Connects to inductor's "output" side in buck/buck-boost modes; shares same inductor as SW2 but opposite switching phase. |
| PVIN (Pin 5) | Power input to switches | Supplies internal FETs; place 10 µF X5R ceramic cap ≤2 mm from pin to suppress high-frequency ripple. |
| EN (Pin 6) | Enable control input | Active-high logic; drives device into <0.2 µA shutdown when low - must not float; ties to system power rail or microcontroller GPIO. |
| SYNC (Pin 7) | Mode selection & sync input | Low = auto PSM/PWM; high = forced PWM; AC signal (2.2–2.8 MHz) = external synchronization - critical for noise-sensitive RF designs. |
| VIN (Pin 8) | Analog supply input | Powers internal control circuitry; decouple with 0.1 µF ceramic cap close to pin; separate from PVIN for noise isolation. |
| AGND (Pin 9) | Analog ground reference | Reference for error amplifier and feedback path; tie to PGND only at single point (exposed pad) to avoid ground loops. |
| FB (Pin 10) | Feedback input | Internally tied to VOUT for fixed-output variants; unused externally - no resistor divider required for ADP2503ACPZ-3.3-R7. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/boost/buck-boost transition | Maintains regulation across VIN < VOUT, VIN > VOUT, and VIN ≈ VOUT without manual reconfiguration or output glitch. |
| Load disconnect in boost mode | Isolates output from input during shutdown - prevents backfeed and enables true system-level power gating. |
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while ensuring stability with standard 1.5 µH/22 µF output filter. |
| Soft start (200 µs) | Limits inrush current to <600 mA with 20 µF output cap - avoids input rail collapse during power-up in battery-fed systems. |
| Three SYNC operating modes | Enables design flexibility: PSM for battery life, forced PWM for EMI control, and external sync for multi-rail timing coherence. |
Applications
| Wireless Handset Power Rail | Digital Camera Core Logic Supply |
|---|---|
Use Scenario: Powers baseband processor and RF transceiver from single-cell Li-ion battery (2.8–4.2 V) where input may dip below or exceed 3.3 V during discharge/charge cycles. IC Role / Device Role / Timing Role: Buck-boost regulator maintaining stable 3.3 V output regardless of battery state - acts as primary system power manager. Use Value: Eliminates need for separate buck and boost converters, reducing solution size by >40% and component count by 7 parts versus discrete topology. |
Use Scenario: Supplies image signal processor (ISP) and memory interface in compact digital camera with variable load (10–500 mA) and tight height constraint (<1 mm). IC Role / Device Role / Timing Role: High-efficiency, low-profile DC-DC converter delivering regulated 3.3 V with fast transient response to burst-mode imaging loads. Use Value: 38 µA quiescent current extends standby time; 2.5 MHz switching allows 1.5 µH inductor - achieving 0.9 mm profile including magnetics. |
| USB-Powered Portable Audio Player | Miniature Hard Disk Drive (HDD) Interface |
Use Scenario: Converts USB 5 V bus to 3.3 V for DAC, headphone amp, and flash memory controller in battery-backed audio player. IC Role / Device Role / Timing Role: Buck converter (VIN > VOUT) with load disconnect - isolates HDD and audio circuits during USB suspend to prevent backfeed. Use Value: Load disconnect function ensures zero current draw from USB host during suspend; 600 mA output supports simultaneous playback and charging. |
Use Scenario: Provides clean 3.3 V rail for SATA or PATA interface logic in ultra-thin 1.8″ HDD enclosures where thermal headroom is limited. IC Role / Device Role / Timing Role: Compact, thermally efficient buck-boost regulator handling input variation from 3.3 V (LDO-fed) to 5.5 V (direct USB) without derating. Use Value: 84°C/W θJA and exposed pad enable full 600 mA output in 30°C ambient without heatsink; soft start prevents HDD spin-up current overload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS63020DSJR | 600 mA output, 2.5 MHz, 2.5–5.5 V input, adjustable/fixed 3.3 V; higher 50 µA quiescent current; no load disconnect. | Lacks true load disconnect in boost mode - unsuitable for systems requiring strict output isolation during shutdown. | Choose if board space allows slightly larger solution and load disconnect is not required; verify thermal performance at 600 mA in same PCB layout. |
| Maxim MAX17222ETA+T | 500 mA output, 2.5 MHz, 1.8–5.5 V input, fixed 3.3 V; 2.5 µA quiescent current; smaller 2 mm × 2 mm WLP package. | Lower output current rating limits use to sub-500 mA loads; no SYNC pin - fixed PSM/PWM only. | Prefer for ultra-low-power wearables with <500 mA peak load; avoid for HDD or camera ISP where 600 mA margin is needed. |
Compared with TPS63020DSJR and MAX17222ETA+T, ADP2503ACPZ-3.3-R7 uniquely combines 600 mA output, true load disconnect, and three-mode SYNC control in a thermally robust 3 mm × 3 mm LFCSP - making it optimal for USB-powered portable systems requiring both efficiency and functional safety during power sequencing.
Availability
ADP2503ACPZ-3.3-R7 is available at Aetrix Electronics and suitable for wireless handsets, portable audio players, and miniature hard disk power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ADP2503ACPZ-3.3-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.
The ADP2503ACPZ-3.3-R7 belongs to Analog Devices' high-efficiency, low-quiescent-current buck-boost converter family - engineered specifically for space- and battery-constrained portable electronics needing seamless voltage regulation across varying input conditions.
FAQ
What is the maximum continuous output current of the ADP2503ACPZ-3.3-R7?
The ADP2503ACPZ-3.3-R7 delivers up to 600 mA continuous output current under typical thermal conditions (θJA = 84°C/W, TA ≤ 85°C). This rating is validated per the datasheet's Switch Current Limit specification (1.0 A min, 1.4 A max) and accounts for internal FET RDS(on) (150 mΩ), efficiency curves, and thermal derating in a standard 4-layer PCB layout.
Does the ADP2503ACPZ-3.3-R7 require external feedback resistors to set its 3.3 V output?
No, the ADP2503ACPZ-3.3-R7 does not require external feedback resistors. It is a fixed-output variant with the feedback node (FB) internally connected to VOUT, providing a factory-trimmed 3.3 V ±2% output. External resistor dividers are only needed for the adjustable versions (e.g., ADP2503ACPZ-R7).
How does the SYNC pin function on the ADP2503ACPZ-3.3-R7?
The SYNC pin on the ADP2503ACPZ-3.3-R7 supports three distinct modes: pulled low enables automatic PSM/PWM transition; driven high forces fixed 2.5 MHz PWM operation; and driven with a 2.2–2.8 MHz clock synchronizes switching to that external source. All modes are electrically validated per Table 1 and Figure 11 in the Rev. F datasheet.
What protection features are integrated into the ADP2503ACPZ-3.3-R7?
The ADP2503ACPZ-3.3-R7 integrates overtemperature shutdown (150°C trip, 125°C hysteresis), undervoltage lockout (2.20 V rising threshold), short-circuit protection (1.4 A switch current limit), reverse current limiting (1.1 A), and soft-start (200 µs ramp). These are confirmed in Sections "Thermal Shutdown", "Short-Circuit Protection", and "Soft Start" of the Rev. F datasheet.
Can the ADP2503ACPZ-3.3-R7 operate with a single-cell Li-ion battery?
Yes, the ADP2503ACPZ-3.3-R7 operates across 2.3 V to 5.5 V input, fully covering the discharge curve of a single Li-ion or Li-polymer cell (2.8 V–4.2 V). Its buck-boost architecture maintains regulated 3.3 V output even when cell voltage drops below 3.3 V - a capability verified in Figures 3, 11, and 14 of the datasheet.
ADP2503ACPZ-3.3-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):
- 3.3V
- 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-3.3-R7 FAQ
1.How can I place an order for ADP2503ACPZ-3.3-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2503ACPZ-3.3-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-3.3-R7 reliable?
The price and inventory of ADP2503ACPZ-3.3-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-3.3-R7 is usually 5 days.
3.What payment methods are accepted for ADP2503ACPZ-3.3-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2503ACPZ-3.3-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2503ACPZ-3.3-R7?
ADP2503ACPZ-3.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2503ACPZ-3.3-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-3.3-R7?
For technical support, including ADP2503ACPZ-3.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2503ACPZ-3.3-R7 requirements.
6.How does Aetrix verify that ADP2503ACPZ-3.3-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2503ACPZ-3.3-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-3.3-R7 meets industry standards.
7.What is the process for return or replacement of ADP2503ACPZ-3.3-R7?
All ADP2503ACPZ-3.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2503ACPZ-3.3-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-3.3-R7 part is unused and in its original packaging.
Return procedure for ADP2503ACPZ-3.3-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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