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Analog Devices Inc. ADP2108ACBZ-2.5-R7
- Part No.:
- ADP2108ACBZ-2.5-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 5-WFBGA, WLCSP
- Datasheet:
-
ADP2108ACBZ-2.5-R7.pdf
- Description:
- IC REG BUCK 2.5V 600MA 5WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,056
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Product details
Overview
ADP2108ACBZ-2.5-R7 from Analog Devices is a fixed-output, 2.5 V, 600 mA synchronous step-down DC-DC converter with 3 MHz fixed-frequency PWM operation, 95% peak efficiency, and 18 μA typical quiescent current. It operates from 2.3 V to 5.5 V input and supports single-cell Li+/Li-Po, USB, or PCMCIA power sources in space-constrained portable electronics.
For engineers reviewing the ADP2108ACBZ-2.5-R7 datasheet, ADP2108ACBZ-2.5-R7 pinout, ADP2108ACBZ-2.5-R7 application, or ADP2108ACBZ-2.5-R7 equivalent, key selection criteria include its WLCSP-5 package footprint, 100% duty-cycle low-dropout mode, internal soft start, thermal shutdown (150°C), and power save mode transition at 80 mA - all critical for battery-powered PDA, media player, and GPS subsystems.
Technical Context
The ADP2108ACBZ-2.5-R7 implements a high-speed current-mode PWM control architecture with fixed 3 MHz switching frequency and automatic transition to hysteretic power save mode below 80 mA load. Its integrated PFET/NFET synchronous rectifier enables 100% duty-cycle operation under low-VIN or high-load conditions.
It features internal compensation, undervoltage lockout (2.15 V fall threshold), and short-circuit protection via frequency foldback. The device uses a proprietary soft-start ramp to limit inrush current and includes thermal shutdown with 20°C hysteresis (150°C trip, 130°C recovery).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% accuracy in PWM mode - ensures stable core voltage for 2.5 V logic rails without external feedback resistors. |
| Max Output Current | 600 mA across full 2.3–5.5 V input range - supports moderate-power digital ICs like baseband processors or audio codecs. |
| Switching Frequency | 3.0 MHz ±0.5 MHz - enables use of sub-1 µH inductors and <10 µF ceramic output capacitors for ultra-compact PCB layouts. |
| Quiescent Current | 18 µA typical - extends battery life in always-on standby modes of handheld devices. |
| Shutdown Current | 0.2 µA max - reduces system leakage during deep sleep, critical for multi-week battery runtime in portable media players. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li+/Li-Po cells (2.7–4.2 V), USB 5 V, or alkaline/NiMH stacks without pre-regulation. |
| Efficiency | 95% peak - minimizes thermal dissipation in sealed enclosures such as GPS navigation units or digital cameras. |
Pinout & Package
ADP2108ACBZ-2.5-R7 is packaged in a 5-ball Wafer-Level Chip Scale Package (WLCSP) with 0.4 mm pitch and 1.0 mm × 1.0 mm footprint. This ultra-compact, bottom-terminal package enables direct chip-scale mounting on dense portable PCBs with minimal board area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Ball A1) | Power input supply node | Connects to 2.3–5.5 V source; requires ≥2.2 µF bypass capacitor placed adjacent to ball for EMI suppression and transient response. |
| GND (Ball A2) | Power and signal reference ground | Common return path for input/output capacitors and IC substrate; must be low-impedance plane connection to minimize noise coupling. |
| SW (Ball B) | Switch node between PFET drain and NFET source | Drives external inductor; high dv/dt node requiring tight layout, minimal trace length, and no vias to reduce EMI and switching losses. |
| EN (Ball C1) | Logic-level enable control input | Active-high (≥1.2 V); pulls device into shutdown drawing ≤1 µA - used for system-level power sequencing and dynamic power gating. |
| FB (Ball C2) | Feedback input to error amplifier | Internally connected to 2.5 V reference; not accessible externally - eliminates resistor divider, saves space, and guarantees output accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated PFET/NFET power switches eliminate external Schottky diode, reducing conduction loss and improving efficiency above 100 mA. |
| Power save mode | Automatic transition at 80 mA load enables >85% efficiency down to 10 µA output current - essential for LCD backlight dimming or sensor sleep states. |
| 100% duty-cycle operation | Maintains regulation when VIN drops near VOUT (e.g., 2.7 V → 2.5 V), preventing brownout in aging Li+ cells without external LDO backup. |
| Internal soft start | Linear output ramp limits inrush current to <100 mA during startup - avoids input voltage sag on weak sources like coin-cell batteries or USB ports. |
| Thermal shutdown with hysteresis | 150°C trip / 130°C recovery prevents latch-up during sustained high-load operation in compact enclosures like wireless handsets. |
Applications
| Portable Media Players | Digital Cameras |
|---|---|
|
Use Scenario: Powering DSP, NAND flash, and OLED display drivers in sub-100 g handheld audio/video players. IC Role / Device Role / Timing Role: Primary 2.5 V supply rail generator with fast load transient response to handle burst-mode video decode and write cycles. Use Value: 3 MHz switching enables <1 µH inductor + 10 µF output cap solution occupying <3 mm² PCB area - critical for thin form factors. |
Use Scenario: Supplying image sensor interface, ISP, and SD card controller in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: High-efficiency 2.5 V regulator supporting intermittent 400 mA bursts during JPEG compression and flash charging. Use Value: 95% peak efficiency and 18 µA quiescent current extend alkaline battery life to >15 hours of active capture time. |
| GPS Navigation Units | Wireless Handsets |
|
Use Scenario: Providing clean 2.5 V bias to RF front-end LNAs and baseband processors in automotive-grade GPS modules. IC Role / Device Role / Timing Role: Low-noise, thermally robust DC-DC converter operating across −40°C to +85°C ambient with minimal derating. Use Value: WLCSP-5 package and 105°C/W θJA enable operation at full 600 mA load in sealed plastic housings without heatsinks. |
Use Scenario: Regulating 2.5 V for Bluetooth SoC peripherals and touchscreen controllers in dual-SIM smartphones. IC Role / Device Role / Timing Role: System PMIC subsystem component enabling dynamic voltage scaling and rapid enable/disable sequencing. Use Value: 0.2 µA shutdown current and EN-controlled sequencing reduce system standby power to <5 µW - meeting 3GPP idle-mode requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 2.5 V fixed, 600 mA, 3.6 MHz, 17 µA IQ, WSON-6 (2.0 × 2.0 mm) | Larger footprint (4× area), higher min input (2.5 V), no 100% duty cycle | Select if board space allows larger package and input never falls below 2.5 V. |
| RT8059GJ6 | 2.5 V fixed, 600 mA, 3 MHz, 25 µA IQ, SOT-23-6 (2.9 × 1.6 mm) | Lead-based SOT-23-6 package, higher quiescent current, no power save mode hysteresis spec | Select for legacy through-hole rework compatibility or cost-sensitive consumer designs where 7 µA IQ penalty is acceptable. |
Compared with TPS62231DRYR and RT8059GJ6, ADP2108ACBZ-2.5-R7 offers the smallest PCB footprint (1.0 × 1.0 mm), guaranteed 100% duty-cycle operation down to 2.3 V input, and tighter power save mode hysteresis - making it optimal for next-generation ultra-portable devices with aggressive size and battery-life targets.
Availability
ADP2108ACBZ-2.5-R7 is available at Aetrix Electronics and suitable for portable media players, GPS navigation units, and wireless handsets requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for ADP2108ACBZ-2.5-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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADP2108 series was designed specifically for space- and power-constrained portable electronics, delivering high efficiency, ultra-low quiescent current, and minimal external component count in wafer-level packaging - targeting battery-powered PDAs, media players, and imaging systems.
FAQ
What is the output voltage tolerance of the ADP2108ACBZ-2.5-R7 over temperature and load?
The ADP2108ACBZ-2.5-R7 delivers 2.5 V output with ±2% accuracy in PWM mode across −40°C to +125°C junction temperature and full 0–600 mA load range. This specification is guaranteed by Analog Devices' production test, ensuring reliable operation in GPS units and digital cameras exposed to wide ambient variations.
Does the ADP2108ACBZ-2.5-R7 require external compensation components?
No, the ADP2108ACBZ-2.5-R7 features fully internal compensation. Its current-mode control architecture and optimized loop response eliminate the need for external RC networks, reducing BOM count and layout complexity - a key advantage over many competing 3 MHz converters requiring manual compensation.
Can the ADP2108ACBZ-2.5-R7 operate with a 2.4 V input supply?
Yes, the ADP2108ACBZ-2.5-R7 supports input voltages as low as 2.3 V and maintains regulation via 100% duty-cycle operation. At 2.4 V input, it delivers full 600 mA at 2.5 V output with reduced efficiency (~82%) but no dropout - critical for maintaining function as Li+ cells discharge below 3.0 V.
What is the thermal resistance (θJA) of the ADP2108ACBZ-2.5-R7 in its WLCSP package?
The ADP2108ACBZ-2.5-R7 in 5-ball WLCSP has a JEDEC 2S2P-measured θJA of 105°C/W. This value enables full 600 mA operation at up to +65°C ambient in typical 2-layer PCB layouts with 1 oz copper and thermal vias under the die - verified in Analog Devices' thermal characterization report Rev. H, Page 4.
How does the power save mode of the ADP2108ACBZ-2.5-R7 affect output voltage ripple?
In power save mode, the ADP2108ACBZ-2.5-R7 operates in hysteretic control, increasing peak-to-peak output ripple to ~15 mV (vs. ~5 mV in PWM mode) at light loads (<80 mA). This trade-off enables >85% efficiency at 10 µA output current - ideal for LCD bias or sensor bias rails where ripple is filtered locally.
ADP2108ACBZ-2.5-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-WFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-WLCSP (1.02x1.45)
ADP2108ACBZ-2.5-R7 FAQ
1.How can I place an order for ADP2108ACBZ-2.5-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2108ACBZ-2.5-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 ADP2108ACBZ-2.5-R7 reliable?
The price and inventory of ADP2108ACBZ-2.5-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2108ACBZ-2.5-R7 is usually 5 days.
3.What payment methods are accepted for ADP2108ACBZ-2.5-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2108ACBZ-2.5-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2108ACBZ-2.5-R7?
ADP2108ACBZ-2.5-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2108ACBZ-2.5-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 ADP2108ACBZ-2.5-R7?
For technical support, including ADP2108ACBZ-2.5-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2108ACBZ-2.5-R7 requirements.
6.How does Aetrix verify that ADP2108ACBZ-2.5-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2108ACBZ-2.5-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 ADP2108ACBZ-2.5-R7 meets industry standards.
7.What is the process for return or replacement of ADP2108ACBZ-2.5-R7?
All ADP2108ACBZ-2.5-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2108ACBZ-2.5-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 ADP2108ACBZ-2.5-R7 part is unused and in its original packaging.
Return procedure for ADP2108ACBZ-2.5-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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