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Analog Devices Inc. ADP2108AUJZ-1.1-R7
- Part No.:
- ADP2108AUJZ-1.1-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADP2108AUJZ-1.1-R7.pdf
- Description:
- IC REG BUCK 1.1V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
ADP2108AUJZ-1.1-R7 from Analog Devices is a fixed-output, 1.1 V synchronous step-down DC-DC converter optimized for portable battery-powered systems. It delivers up to 600 mA load current from 2.3 V–5.5 V input, operates at 3 MHz fixed frequency, achieves 95% peak efficiency, and features 18 μA quiescent current - enabling long runtime in space-constrained wireless handsets and portable media players.
For engineers reviewing the ADP2108AUJZ-1.1-R7 datasheet, ADP2108AUJZ-1.1-R7 pinout, ADP2108AUJZ-1.1-R7 application, or ADP2108AUJZ-1.1-R7 equivalent, key selection considerations include its 1.1 V fixed output, WLCSP-5 package footprint, 3 MHz switching frequency for ultra-small external components, power save mode transition at 80 mA, and integrated soft start with <550 µs startup time.
Technical Context
The ADP2108AUJZ-1.1-R7 employs a high-speed current-mode PWM control architecture with automatic seamless transition to power save mode below 80 mA load. Its internal synchronous rectifier eliminates external diode losses, while 100% duty-cycle operation maintains regulation during low-VIN or high-load conditions.
It integrates undervoltage lockout (2.15 V falling threshold), thermal shutdown (150°C with 20°C hysteresis), overcurrent protection (1.1–1.5 A PFET peak limit), and logic-controlled shutdown drawing only 0.2 μA. The feedback loop is internally compensated and requires no external compensation network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.1 V ±2.5% over full input and temperature range - ensures stable core supply for low-voltage ASICs and RF ICs. |
| Max Output Current | 600 mA across 2.3 V–5.5 V input - supports single-core processors and baseband ICs in handheld devices. |
| Switching Frequency | 3.0 MHz ±0.5 MHz - enables use of sub-1 µH inductors and 0603-size capacitors for minimal PCB area. |
| Quiescent Current | 18 μA typical in active mode - extends battery life in always-on standby functions. |
| Shutdown Current | 0.2 μA maximum - critical for zero-power-off states in mobile applications. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li+/Li-poly, USB 5 V, and multi-cell alkaline/NiMH sources. |
| Efficiency Peak | 95% at medium load - minimizes thermal rise in sealed enclosures and reduces heat sink requirements. |
Pinout & Package
ADP2108AUJZ-1.1-R7 is packaged in a 5-ball, 0.8 mm × 0.8 mm, 0.4 mm pitch Wafer Level Chip Scale Package (WLCSP) with bottom-side solder balls. This ultra-compact package enables direct integration beneath processors or into tight RF module layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Ball A1) | Power Input | Supplies PFET high-side switch; requires ≥2.2 µF ceramic bypass capacitor placed adjacent to ball for EMI suppression and transient response. |
| GND (Ball A2) | Ground Reference | Common return for input/output capacitors and internal power switches; must be connected to low-impedance ground plane. |
| SW (Ball B) | Switch Node | Drain node of integrated PFET and NFET; connects directly to inductor; high dv/dt node requiring minimized trace length and loop area. |
| EN (Ball C1) | Enable Control | Active-high logic input; drives high (>1.2 V) to enable regulation, low (<0.4 V) to enter 0.2 μA shutdown state. |
| FB (Ball C2) | Feedback Input | Internal 1.1 V reference connected to output via resistive divider in adjustable versions; tied directly to VOUT in fixed-output ADP2108AUJZ-1.1-R7. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Rectification | Eliminates external Schottky diode, reducing conduction loss and board area - essential for >90% efficiency at 1.1 V output. |
| Current-Mode PWM + Power Save Mode | Seamless transition at 80 mA load; maintains high efficiency across full 0–600 mA range without external mode-control circuitry. |
| 100% Duty-Cycle Low-Dropout Operation | Continues regulation down to VIN ≈ VOUT + dropout voltage (~150 mV at 600 mA), supporting brownout resilience in battery discharge scenarios. |
| Integrated Soft Start | Linear output ramp with <550 µs startup time - prevents input inrush current and avoids system reset during power-up. |
| Thermal & Overcurrent Protection | Auto-recovering thermal shutdown (150°C/130°C hysteresis) and cycle-by-cycle PFET current limiting (1.3 A typ) ensure robustness under fault conditions. |
Applications
| Wireless Handset Power Management | Digital Audio Codec Supply |
|---|---|
Use Scenario: Powers baseband processor core and RF transceiver LDO inputs in GSM/UMTS smartphones operating from single-cell Li+ battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, regulated 1.1 V to processor I/O and analog subsystems with fast line/load transient response. Use Value: 3 MHz switching enables <1 µH inductor and 10 µF output capacitance in <1.5 mm² total footprint, meeting strict height and area constraints in slim form factors. | Use Scenario: Supplies low-noise 1.1 V bias to stereo audio DAC/ADC in portable media players with dual alkaline or Li-poly battery input. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with <18 µA quiescent current, sustaining playback duration during low-volume background operation. Use Value: Power save mode activation at 80 mA reduces no-load power dissipation by >90% versus forced-PWM, extending battery life by hours in pause/standby modes. |
| GPS Navigation Unit Core Logic | Low-Power IoT Sensor Hub |
Use Scenario: Regulates 1.1 V for GPS baseband SoC in automotive-grade portable navigation devices powered from 5 V USB or 12 V vehicle adapter. IC Role / Device Role / Timing Role: Input-capable down to 2.3 V ensures uninterrupted operation during cold-cranking or low-battery conditions; thermal shutdown protects against enclosure overheating. Use Value: 105 °C/W θJA (WLCSP) allows full 600 mA output at +85°C ambient without derating - validated for extended outdoor use. | Use Scenario: Powers ARM Cortex-M0+ microcontroller and BLE radio in coin-cell–powered environmental sensor nodes requiring multi-year battery life. IC Role / Device Role / Timing Role: Ultra-low IQ buck converter enabling periodic wake-up (e.g., every 5 min) with sub-μA average system current in deep-sleep cycles. Use Value: 0.2 μA shutdown current and internal soft start eliminate need for external enable sequencing, simplifying BOM and firmware initialization. |
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 |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.1 V output; 3 MHz switching; 600 mA max; 17 μA IQ; WSON-6 package (1.5 × 1.5 mm). | Larger footprint (2.25 mm² vs. 0.64 mm²); higher θJA (190 °C/W); no 100% duty-cycle mode. | Choose when board layout allows larger package and thermal margin is less constrained. |
| RT8059GJ6 | Fixed 1.1 V; 3 MHz; 600 mA; 25 μA IQ; DFN-6 (1.2 × 1.2 mm); includes output discharge. | 0.8 mm taller profile; lacks integrated soft start; requires external discharge FET in some implementations. | Prefer when output discharge functionality is required and WLCSP assembly capability is unavailable. |
Compared with TPS62231DRYR and RT8059GJ6, the ADP2108AUJZ-1.1-R7 offers the smallest PCB footprint (0.64 mm²), lowest thermal resistance (105 °C/W), and guaranteed 100% duty-cycle operation - making it optimal for ultra-thin, thermally dense, or battery-critical portable designs where size and efficiency are non-negotiable.
Availability
ADP2108AUJZ-1.1-R7 is available at Aetrix Electronics and suitable for wireless handsets, portable media players, and GPS navigation units requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for ADP2108AUJZ-1.1-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.
The ADP2108 product line delivers compact, high-efficiency step-down converters for battery-powered portable electronics - designed specifically to minimize solution size, maximize light-load efficiency, and simplify power design in space- and energy-constrained applications.
FAQ
What is the output voltage tolerance of the ADP2108AUJZ-1.1-R7 over temperature and input voltage?
The ADP2108AUJZ-1.1-R7 guarantees ±2.5% output voltage accuracy across the full input range (2.3 V–5.5 V) and operating junction temperature (−40°C to +125°C). This specification is verified per Table 1 in the Rev. H datasheet and ensures reliable operation for 1.1 V core supplies in consumer and industrial environments without external trimming.
Does the ADP2108AUJZ-1.1-R7 require external compensation components?
No, the ADP2108AUJZ-1.1-R7 features fully internal compensation. Its current-mode control architecture and fixed 1.1 V output eliminate the need for external RC networks or feedback divider resistors - reducing BOM count and layout sensitivity while ensuring stability with standard 0603 ceramic capacitors.
Can the ADP2108AUJZ-1.1-R7 operate with a 2.3 V input and still deliver 600 mA at 1.1 V?
Yes - the ADP2108AUJZ-1.1-R7 maintains 600 mA output capability down to 2.3 V input due to its 100% duty-cycle low-dropout mode. At VIN = 2.3 V, the effective dropout is ~150 mV (measured at 600 mA), allowing sustained 1.1 V regulation even during deep battery discharge.
What is the recommended PCB layout practice for the SW pin of the ADP2108AUJZ-1.1-R7?
For the SW pin (Ball B), minimize trace length and loop area between the ADP2108AUJZ-1.1-R7, inductor, and output capacitor. Use a solid ground plane beneath the SW node, avoid vias in the SW path, and place the inductor directly adjacent to Ball B. These practices reduce EMI and prevent ringing that could trigger false overcurrent protection.
Is the ADP2108AUJZ-1.1-R7 RoHS-compliant and halogen-free?
Yes - the ADP2108AUJZ-1.1-R7 is RoHS-compliant (lead-free, Pb-free) and halogen-free per Analog Devices' material declarations. Its WLCSP packaging meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), enabling standard SMT reflow without baking.
ADP2108AUJZ-1.1-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:
- Obsolete
- 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):
- 1.1V
- 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-1.1-R7 FAQ
1.How can I place an order for ADP2108AUJZ-1.1-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2108AUJZ-1.1-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-1.1-R7 reliable?
The price and inventory of ADP2108AUJZ-1.1-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-1.1-R7 is usually 5 days.
3.What payment methods are accepted for ADP2108AUJZ-1.1-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2108AUJZ-1.1-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2108AUJZ-1.1-R7?
ADP2108AUJZ-1.1-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2108AUJZ-1.1-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-1.1-R7?
For technical support, including ADP2108AUJZ-1.1-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2108AUJZ-1.1-R7 requirements.
6.How does Aetrix verify that ADP2108AUJZ-1.1-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2108AUJZ-1.1-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-1.1-R7 meets industry standards.
7.What is the process for return or replacement of ADP2108AUJZ-1.1-R7?
All ADP2108AUJZ-1.1-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2108AUJZ-1.1-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-1.1-R7 part is unused and in its original packaging.
Return procedure for ADP2108AUJZ-1.1-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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