My Inquiry
My Account
Analog Devices Inc. ADP2503ACPZ-2.8-R7
- Part No.:
- ADP2503ACPZ-2.8-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2503ACPZ-2.8-R7.pdf
- Description:
- IC REG BUCK BOOST 2.8V 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,725
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADP2503ACPZ-2.8-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 delivering a fixed 2.8 V output. It features seamless buck/boost/buck-boost mode transition, 38 μA quiescent current, internal compensation, and load disconnect capability - optimized for space-constrained portable power rails in USB-powered devices and wireless handsets.
For engineers reviewing the ADP2503ACPZ-2.8-R7 datasheet, ADP2503ACPZ-2.8-R7 pinout, ADP2503ACPZ-2.8-R7 application, or ADP2503ACPZ-2.8-R7 equivalent, this page delivers verified technical context, exact pin functions, real-world application cards, validated alternatives, and supply-chain support details specific to the ADP2503ACPZ-2.8-R7 fixed-output variant.
Technical Context
The ADP2503ACPZ-2.8-R7 implements synchronous average current-mode control with integrated N- and P-channel MOSFETs (150 mΩ each), enabling operation across buck, boost, and buck-boost topologies depending on VIN relative to VOUT. Its 2.5 MHz switching frequency supports compact 1.5 µH inductors and minimizes output voltage ripple without external compensation.
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 pin modes: power-save (PSM), forced PWM, and external clock synchronization (2.2–2.8 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600 mA maximum continuous - sufficient for powering baseband processors or RF front-ends in handheld devices. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li-ion/Li-poly, dual alkaline/NiMH, USB 5 V, or PCMCIA sources. |
| Fixed Output Voltage | 2.8 V ±2% initial accuracy - stable rail for low-voltage logic, sensors, or audio codecs requiring tight regulation. |
| Switching Frequency | 2.5 MHz typical - enables use of small 1.5 µH inductors and reduces EMI fundamental frequency above sensitive bands. |
| Quiescent Current | 38 μA typical - extends battery life in always-on or standby subsystems without sacrificing startup speed. |
| Shutdown Current | 0.2 μA typical - ensures near-zero drain during system sleep, critical for long-term portable operation. |
| Thermal Shutdown | 150°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
ADP2503ACPZ-2.8-R7 uses a 10-lead, 3 mm × 3 mm LFCSP (QFN) package with exposed pad (EP) thermally connected to PGND. The package supports high-density layout and efficient heat dissipation via the EP-to-PGND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VOUT | Regulated output node | Delivers fixed 2.8 V; requires low-ESR ceramic capacitor (≥22 µF) between VOUT and PGND for stability and transient response. |
| 2 SW2 | Boost-side power switch node | Connects to inductor in boost/buck-boost mode; must be routed with short, wide trace to minimize switching loop inductance and EMI. |
| 3 PGND | Power ground reference | Common return for input/output capacitors and power switches; must be tied directly to EP and form low-impedance plane. |
| 4 SW1 | Buck-side power switch node | Connects to same inductor as SW2; shared inductor simplifies layout but requires careful routing to avoid coupling noise into analog sections. |
| 5 PVIN | Main power input for switches | Supplies internal power switches only; requires local 10 µF ceramic capacitor to PGND to handle high di/dt transients. |
| 6 EN | Enable/shutdown control | Logic-high (>1.2 V) enables regulation with soft-start; logic-low (<0.4 V) disables device and reduces input current to 0.2 μA. |
| 7 SYNC | Mode selection & synchronization | Low = PSM enabled; high = forced PWM; AC signal (2.2–2.8 MHz) = external sync - eliminates beat frequencies in multi-rail systems. |
| 8 VIN | Analog supply input | Powers internal error amplifier, reference, and logic; decoupled separately from PVIN to reduce noise coupling into feedback path. |
| 9 AGND | Analog ground reference | Separate ground for precision circuitry; must be connected to PGND at single point near VIN/AGND pins to avoid ground bounce. |
| 10 FB | Feedback input | Internally connected to VOUT for fixed-output variants; not user-accessible - eliminates resistor divider errors and layout sensitivity. |
| EP | Exposed thermal pad | Must be soldered to solid PGND copper area with ≥4 thermal vias to inner ground planes for thermal performance and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless mode transition | Automatically shifts between buck, boost, and buck-boost based on VIN vs. VOUT - maintains regulation without output glitches during battery discharge. |
| Load disconnect in boost mode | True isolation of VOUT from PVIN when disabled - prevents backfeed and preserves battery charge in powered-off subsystems. |
| Internal compensation | Eliminates external compensation network - reduces BOM count, saves board space, and guarantees stability across all operating conditions. |
| Soft start (200 μs) | Limits inrush current to <600 mA with 20 µF output cap - avoids input rail collapse and prevents false UVLO triggering during power-up. |
| Power save mode (PSM) | Reduces switching frequency under light loads (<75 mA), cutting quiescent loss while maintaining regulation - ideal for sensor wake-up intervals. |
Applications
| Wireless Handset Baseband Power | Digital Camera Sensor Rail |
|---|---|
Use Scenario: Powering baseband processor core and I/O banks during varying battery voltage (3.0–4.2 V) while maintaining stable 2.8 V logic supply. IC Role / Device Role / Timing Role: Buck-boost regulator providing constant 2.8 V output regardless of battery state-of-charge - acts as primary system power rail. Use Value: Eliminates need for separate buck and boost converters; enables single-cell Li-ion operation without brownouts during transmit bursts. |
Use Scenario: Supplying image sensor and ISP logic in compact digital cameras where input is USB 5 V or partially discharged Li-ion (2.8–4.5 V). IC Role / Device Role / Timing Role: Step-down regulator converting variable input to precise 2.8 V - powers analog front-end and digital logic with low noise. Use Value: 38 μA quiescent current extends standby time; 2.5 MHz switching avoids interference with image capture timing signals. |
| USB-Powered Audio DAC | Miniature HDD +2.8 V Motor Bias |
Use Scenario: Delivering clean 2.8 V to high-resolution audio DAC in USB bus-powered portable players with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise buck-boost converter operating in forced PWM mode - provides regulated rail synchronized to USB frame clock. Use Value: SYNC pin allows locking to 1 kHz or 8 kHz USB SOF signals, eliminating audible beat tones in audio output. |
Use Scenario: Generating +2.8 V bias for spindle motor pre-driver in ultra-thin 1.8″ HDDs powered from 3.3 V or 5 V host supplies. IC Role / Device Role / Timing Role: Compact step-down regulator with load disconnect - isolates motor circuit during spin-down to prevent back-EMF damage. Use Value: 1 mm height profile fits mechanical constraints; true load disconnect avoids uncontrolled motor coasting after power removal. |
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; 2.4 MHz switching; no load disconnect in boost mode. | Requires external feedback resistors for fixed 2.8 V; lacks true load disconnect - unsuitable for battery-isolation-critical designs. | Select TPS63020DSJR only if adjustable output flexibility and TI's WEBENCH support outweigh need for guaranteed load isolation. |
| MAX77827BEWC+T | 600 mA, 2.5 V–5.5 V input, fixed 2.8 V option; 2.2 MHz switching; includes I²C programmability and fault reporting. | Higher pin count (16-WLP); requires I²C interface and firmware integration - adds complexity for simple fixed-rail use cases. | Choose MAX77827BEWC+T when system-level telemetry (e.g., input voltage monitoring, thermal alerts) justifies added software overhead. |
Compared with TPS63020DSJR and MAX77827BEWC+T, the ADP2503ACPZ-2.8-R7 offers unique integration of load disconnect, internal feedback for fixed 2.8 V, and minimal 10-pin footprint - making it optimal for cost-sensitive, space-constrained, battery-isolated applications without communication interfaces.
Availability
ADP2503ACPZ-2.8-R7 is available at Aetrix Electronics and suitable for wireless handsets, USB-powered audio devices, miniature hard disk drives, and digital camera sensor rails requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for ADP2503ACPZ-2.8-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 consumer markets with precision power, sensing, and signal chain solutions.
The ADP2503ACPZ-2.8-R7 belongs to Analog Devices' high-efficiency, low-quiescent-current buck-boost converter family - engineered specifically for battery-powered portable electronics needing seamless voltage regulation across full battery discharge curves.
FAQ
What is the output voltage tolerance of the ADP2503ACPZ-2.8-R7?
The ADP2503ACPZ-2.8-R7 has a fixed 2.8 V output with ±2% initial accuracy over temperature and line/load conditions. This specification is guaranteed at room temperature with no load and reflects the trimmed internal feedback network - no external resistors affect this tolerance since the FB pin is internally connected for fixed-output variants.
Does the ADP2503ACPZ-2.8-R7 support load disconnect in all operating modes?
Yes - the ADP2503ACPZ-2.8-R7 provides true load disconnect only when operating in boost configuration and during shutdown. In buck or buck-boost mode, the output remains connected to input through internal switches. This behavior is inherent to its topology and is confirmed in the General Description and Pin Function Descriptions sections of the Rev. F datasheet.
Can the ADP2503ACPZ-2.8-R7 be synchronized to an external clock?
Yes - the SYNC pin accepts an external clock signal between 2.2 MHz and 2.8 MHz. When driven with a clean square wave meeting minimum on/off time requirements (≥160 ns), the ADP2503ACPZ-2.8-R7 locks its internal oscillator to that frequency, enabling deterministic switching and EMI reduction in multi-converter systems.
What is the recommended inductor value for the ADP2503ACPZ-2.8-R7?
Analog Devices recommends a 1.5 µH shielded ferrite inductor (e.g., Toko DE2810C or Murata LQM2HP-G0) for the ADP2503ACPZ-2.8-R7. This value balances low current ripple, minimal size, and efficiency - especially critical in boost mode where peak inductor current is highest. Inductor saturation current must exceed calculated IIN(MAX) + ΔILOAD/2.
How does the ADP2503ACPZ-2.8-R7 handle thermal overload?
The ADP2503ACPZ-2.8-R7 activates thermal shutdown at 150°C junction temperature and resumes operation only after cooling to ~125°C due to 25°C hysteresis. During shutdown, all power switches turn off, preserving input source integrity. This protection is independent of ambient temperature and depends solely on actual die temperature, as defined in the Thermal Characteristics table.
ADP2503ACPZ-2.8-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 2.8V
- 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-2.8-R7 FAQ
1.How can I place an order for ADP2503ACPZ-2.8-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2503ACPZ-2.8-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-2.8-R7 reliable?
The price and inventory of ADP2503ACPZ-2.8-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-2.8-R7 is usually 5 days.
3.What payment methods are accepted for ADP2503ACPZ-2.8-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2503ACPZ-2.8-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2503ACPZ-2.8-R7?
ADP2503ACPZ-2.8-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2503ACPZ-2.8-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-2.8-R7?
For technical support, including ADP2503ACPZ-2.8-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2503ACPZ-2.8-R7 requirements.
6.How does Aetrix verify that ADP2503ACPZ-2.8-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2503ACPZ-2.8-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-2.8-R7 meets industry standards.
7.What is the process for return or replacement of ADP2503ACPZ-2.8-R7?
All ADP2503ACPZ-2.8-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2503ACPZ-2.8-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-2.8-R7 part is unused and in its original packaging.
Return procedure for ADP2503ACPZ-2.8-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP2503ACPZ-2.8-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…
