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Analog Devices Inc. ADP2108AUJZ-1.8-R7
- Part No.:
- ADP2108AUJZ-1.8-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADP2108AUJZ-1.8-R7.pdf
- Description:
- IC REG BUCK 1.8V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,366
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Product details
Overview
ADP2108AUJZ-1.8-R7 from Analog Devices is a fixed-output, 1.8 V, 600 mA synchronous step-down DC-DC converter with 3 MHz switching frequency, 2.3 V to 5.5 V input range, and 95% peak efficiency. It integrates PFET/NFET power switches, internal compensation, soft start, and thermal/overcurrent protection-designed for space-constrained portable power rails in battery-powered devices.
For engineers reviewing the ADP2108AUJZ-1.8-R7 datasheet, ADP2108AUJZ-1.8-R7 pinout, ADP2108AUJZ-1.8-R7 application, or ADP2108AUJZ-1.8-R7 equivalent, key selection considerations include its WLCSP-5 package footprint, 18 μA quiescent current in active mode, 0.2 μA shutdown current, power-save mode transition at 80 mA, and guaranteed operation from −40°C to +125°C junction temperature.
Technical Context
The ADP2108AUJZ-1.8-R7 employs a high-speed current-mode PWM control architecture with fixed 3 MHz oscillator, enabling fast line/load transient response and stable regulation across its 2.3 V–5.5 V input range. Its integrated synchronous rectifier eliminates external diode losses, while internal soft start and 100% duty-cycle low-dropout mode support wide VIN-to-VOUT differentials.
It operates in two distinct modes: continuous PWM mode above 80 mA load (±2% output accuracy), and hysteretic power-save mode below that threshold-reducing switching losses and maintaining >85% efficiency at 10 mA. Undervoltage lockout (2.15 V falling threshold) and thermal shutdown (150°C with 20°C hysteresis) ensure robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% in PWM mode-eliminates external feedback resistor network and ensures stable core voltage for low-power microcontrollers and RF ICs. |
| Max Output Current | 600 mA across full input range-supports single-supply operation for ARM Cortex-M0/M3 subsystems, baseband processors, and sensor hubs without derating. |
| Switching Frequency | 3.0 MHz ±0.5 MHz-enables use of sub-1 µH inductors (e.g., 1 µH) and 0603-size ceramic capacitors, reducing total solution footprint to <15 mm². |
| Quiescent Current | 18 µA typical at no load-extends battery life in always-on wearable sensors and IoT endpoint nodes with intermittent wake-up cycles. |
| Shutdown Current | 0.2 µA maximum-ensures negligible battery drain during deep-sleep states in portable medical monitors and remote controls. |
| Input Voltage Range | 2.3 V to 5.5 V-compatible with single Li+/Li-poly cells (fully charged to depleted), USB VBUS, and multi-cell alkaline/NiMH stacks without intermediate LDO. |
| Efficiency Peak | 95% at 200 mA, 3.6 VIN/1.8 VOUT-minimizes thermal rise in sealed enclosures and enables higher power density than competing 2 MHz converters. |
Pinout & Package
ADP2108AUJZ-1.8-R7 is packaged in a 5-ball, 0.8 mm × 0.8 mm, 0.4 mm pitch Wafer-Level Chip Scale Package (WLCSP), optimized for ultra-compact PCB layouts and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Ball A1) | Power Input | Connects to 2.3–5.5 V source; requires ≥2.2 µF ceramic bypass capacitor placed adjacent to ball for EMI suppression and transient current sourcing. |
| GND (Ball A2) | Ground Reference | Primary return path for input/output capacitors and internal power switches; must be connected to solid ground plane with minimal trace inductance. |
| SW (Ball B) | Switch Node | Drain node of integrated PFET and NFET; connects directly to inductor; high dv/dt requires tight layout and guard ring to minimize radiated emissions. |
| EN (Ball C1) | Enable Control | Logic-level input (1.2 V high threshold); pulling low disables regulator and reduces input current to ≤1 µA-used for system-level power sequencing. |
| FB (Ball C2) | Feedback Input | Internally tied to 1.8 V reference; not externally accessible-confirms fixed-output configuration and eliminates feedback divider errors or noise pickup. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Rectification | Eliminates external Schottky diode, reducing conduction loss by ~30% vs. asynchronous designs and enabling >90% efficiency at 50 mA. |
| Current-Mode PWM Control | Provides inherent cycle-by-cycle current limiting and superior load transient response (<10 µs recovery for 50–300 mA step) without external compensation. |
| Power-Save Mode Transition | Smooth, hysteresis-controlled shift between PWM and PSM at 80 mA-maintains regulation while cutting switching losses and extending battery runtime in idle states. |
| 100% Duty-Cycle Operation | Enables dropout as low as 120 mV at 600 mA (VIN = 1.92 V), supporting brownout tolerance in Li+ cells nearing end-of-discharge. |
| Integrated Soft Start | Linear output ramp prevents inrush current spikes into downstream capacitance-critical for avoiding input rail collapse in shared battery systems. |
Applications
| Wireless Handset Baseband Power | Digital Camera Image Sensor Rail |
|---|---|
Use Scenario: Powers ARM-based application processor cores and DDR I/O in compact smartphones operating from single-cell Li+ battery. IC Role / Device Role / Timing Role: Primary 1.8 V core supply delivering up to 600 mA with <50 mV load transient deviation and <10 µs recovery. Use Value: Enables direct battery connection without pre-regulation, reducing BoM count and PCB area while sustaining 95% efficiency at typical 200 mA operating current. |
Use Scenario: Supplies image signal processor (ISP) and CMOS sensor interface logic in ultra-thin digital cameras and action cams. IC Role / Device Role / Timing Role: Low-noise, fast-transient 1.8 V rail ensuring clean clock domain switching and minimizing image artifacts during burst capture. Use Value: 3 MHz switching avoids interference with sensor pixel readout timing; WLCSP-5 footprint fits within tight camera module height constraints (<0.6 mm). |
| Portable Media Player Audio Codec | GPS Navigation Unit RF Front-End |
Use Scenario: Provides clean 1.8 V bias for stereo DAC/ADC and headphone amplifier in battery-powered MP3 players and Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-quiescent-current DC-DC stage preceding LDO post-regulation-reducing overall system power by 40% vs. LDO-only solution. Use Value: 18 µA IQ extends playback time by >2 hours per charge; power-save mode maintains regulation during pause states without audible pop/click. |
Use Scenario: Powers GPS/GNSS RF front-end ICs (e.g., MAX2769, uBlox NEO-M8) in automotive dashcams and handheld navigation units. IC Role / Device Role / Timing Role: Stable 1.8 V supply for low-noise LNAs and mixers, rejecting battery ripple and engine noise via high PSRR at 100 kHz. Use Value: Internal compensation and current-mode control deliver >60 dB PSRR at 100 kHz-critical for maintaining C/N₀ ratio under noisy vehicle electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | 1.8 V fixed, 600 mA, 3.6 MHz, 2.05–6.0 V input; 22 µA IQ; WSON-6 (2 mm × 2 mm) | Larger footprint (4× area), higher minimum input voltage limits use with deeply discharged Li+ cells | Select when board space allows larger package and higher input voltage margin is acceptable. |
| Maxim Integrated MAX17222ETA+ | 1.8 V fixed, 500 mA, 2.5 MHz, 2.0–5.5 V input; 1.6 µA IQ in shutdown; 1.22 mm × 1.22 mm WLP-6 | Lower max current (500 mA), lower IQ but no power-save mode-less efficient at medium loads (100–400 mA) | Select for ultra-low-power always-on sensors where 500 mA headroom suffices and 1.6 µA shutdown is critical. |
Compared with TPS62231DRYR and MAX17222ETA+, the ADP2108AUJZ-1.8-R7 delivers optimal balance of ultra-small WLCSP-5 size, 600 mA capability, and 95% peak efficiency at mid-load-making it preferred for space- and battery-life-constrained portable designs where input can dip to 2.3 V.
Availability
ADP2108AUJZ-1.8-R7 is available at Aetrix Electronics and suitable for wireless handsets, portable media players, digital cameras, and GPS navigation units requiring stable component supply with full production traceability and long-term lifecycle support.
Supply support for ADP2108AUJZ-1.8-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.
The ADP2108AUJZ-1.8-R7 belongs to Analog Devices' ADP21xx family of compact, high-efficiency DC-DC converters-engineered specifically for battery-powered portable electronics demanding minimal footprint, low IQ, and robust transient performance.
FAQ
What is the recommended input capacitor for ADP2108AUJZ-1.8-R7?
The ADP2108AUJZ-1.8-R7 requires a minimum 4.7 µF X5R/X7R ceramic capacitor rated for ≥6.3 V, placed directly adjacent to the VIN and GND balls. Recommended part is Murata GRM188R60J475 (0603, 4.7 µF, 6.3 V) - its low ESR (<15 mΩ) minimizes input ripple and supports fast transient current delivery during load steps. Layout must minimize loop area between VIN, GND, and capacitor terminals.
Does ADP2108AUJZ-1.8-R7 require external compensation components?
No, ADP2108AUJZ-1.8-R7 features fully internal compensation-no external resistors or capacitors are needed. This simplifies design, eliminates tuning effort, and guarantees stability with standard 1 µH inductors and 10 µF output capacitors. The internal compensation network is optimized for the fixed 1.8 V output and 3 MHz switching frequency.
Can ADP2108AUJZ-1.8-R7 operate with a 2.3 V input and 1.8 V output at full 600 mA load?
Yes, ADP2108AUJZ-1.8-R7 supports 100% duty-cycle operation, enabling regulation down to VIN = VOUT + dropout voltage. At 600 mA and 25°C, dropout is ~120 mV - so 2.3 V input sustains 1.8 V output with margin. Efficiency drops to ~82% under these conditions, but thermal performance remains within spec due to WLCSP's 105°C/W θJA.
What is the function of the FB pin on ADP2108AUJZ-1.8-R7?
On ADP2108AUJZ-1.8-R7, the FB pin (Ball C2) is internally connected to the 1.8 V reference and is not user-accessible. It serves only as the feedback node for the internal error amplifier - confirming this is a fixed-output variant. Unlike adjustable versions (e.g., ADP2108ACBZ-RED), no external resistor divider is connected, eliminating feedback inaccuracies and layout sensitivity.
How does the power-save mode of ADP2108AUJZ-1.8-R7 affect output voltage ripple?
In power-save mode (active below ~80 mA load), ADP2108AUJZ-1.8-R7 operates in hysteretic control, increasing peak-to-peak output ripple to ~15–20 mV (vs. <5 mV in PWM mode). This trade-off enables >85% efficiency at 10 mA while maintaining regulation. Ripple remains bounded and predictable-verified in Figure 27 of the ADP2108 datasheet Rev. H.
ADP2108AUJZ-1.8-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 1.8V
- 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:
- TSOT-23-5
ADP2108AUJZ-1.8-R7 FAQ
1.How can I place an order for ADP2108AUJZ-1.8-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2108AUJZ-1.8-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 ADP2108AUJZ-1.8-R7 reliable?
The price and inventory of ADP2108AUJZ-1.8-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2108AUJZ-1.8-R7 is usually 5 days.
3.What payment methods are accepted for ADP2108AUJZ-1.8-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2108AUJZ-1.8-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2108AUJZ-1.8-R7?
ADP2108AUJZ-1.8-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2108AUJZ-1.8-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 ADP2108AUJZ-1.8-R7?
For technical support, including ADP2108AUJZ-1.8-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2108AUJZ-1.8-R7 requirements.
6.How does Aetrix verify that ADP2108AUJZ-1.8-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2108AUJZ-1.8-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 ADP2108AUJZ-1.8-R7 meets industry standards.
7.What is the process for return or replacement of ADP2108AUJZ-1.8-R7?
All ADP2108AUJZ-1.8-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2108AUJZ-1.8-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 ADP2108AUJZ-1.8-R7 part is unused and in its original packaging.
Return procedure for ADP2108AUJZ-1.8-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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