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Analog Devices Inc. ADP2108ACBZ-1.82R7
- Part No.:
- ADP2108ACBZ-1.82R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 5-WFBGA, WLCSP
- Datasheet:
-
ADP2108ACBZ-1.82R7.pdf
- Description:
- IC REG BUCK 1.82V 600MA 5WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
ADP2108ACBZ-1.82R7 from Analog Devices is a fixed-output, 1.82 V synchronous step-down DC-DC converter with 600 mA maximum load current, 3 MHz switching frequency, and 2.3 V to 5.5 V input range. It integrates PFET/NFET power switches, internal compensation, soft start, and operates in both PWM and power save modes-designed for space-constrained portable power rails in digital audio and GPS navigation units.
For engineers reviewing the ADP2108ACBZ-1.82R7 datasheet, ADP2108ACBZ-1.82R7 pinout, ADP2108ACBZ-1.82R7 application, or ADP2108ACBZ-1.82R7 equivalent, key selection considerations include its 5-ball WLCSP package, 18 μA quiescent current, 95% peak efficiency, 100% duty cycle low-dropout capability, and thermal shutdown at 150°C.
Technical Context
The ADP2108ACBZ-1.82R7 employs a high-speed current-mode PWM control architecture with fixed 3 MHz operation at medium-to-heavy loads and automatic transition to hysteretic power save mode below 80 mA. Its internal soft start limits inrush current, while undervoltage lockout (2.15 V threshold) prevents deep battery discharge.
It features integrated synchronous rectification with PFET/NFET on-resistance of 320 mΩ/300 mΩ (WLCSP), 1100–1500 mA peak current limiting, and 100% duty-cycle operation for lowest dropout under high-load/low-VIN conditions-enabling stable regulation from single Li+/LiPo or multi-cell alkaline/NiMH sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.82 V ±2% accuracy in PWM mode-ensures precise core voltage for low-power microcontrollers and DSPs. |
| Max Output Current | 600 mA across full 2.3–5.5 V input range-supports sustained operation of baseband processors and RF transceivers. |
| 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 layout. |
| Quiescent Current | 18 µA typical-extends battery life in always-on sensor nodes and standby subsystems. |
| Shutdown Current | 0.2 µA max-minimizes leakage during system sleep states without external disconnect circuitry. |
| Efficiency Peak | 95% at mid-load-reduces thermal load in sealed handheld enclosures and enables passive cooling only. |
| Thermal Shutdown | 150°C with 20°C hysteresis-prevents permanent damage during transient overloads or poor heatsinking. |
Pinout & Package
ADP2108ACBZ-1.82R7 is packaged in a 5-ball, 0.8 mm × 0.8 mm, 0.4 mm pitch Wafer-Level Chip Scale Package (WLCSP). The package supports solder reflow per JEDEC J-STD-020 and has θJA = 105°C/W on a 2S2P test board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A1) | Power input 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 (A2) | Power and signal reference | Common return for input/output capacitors and PCB ground plane; critical for minimizing switching noise coupling. |
| SW (B) | Switch node | Drain connection of internal PFET and NFET; drives external inductor; high dv/dt node requiring tight layout and guard ring. |
| EN (C1) | Logic enable input | Active-high TTL-compatible control (1.2 V threshold); pulls device into <1 µA shutdown when low. |
| FB (C2) | Feedback sensing input | Internally connected to 1.82 V reference; no external resistor divider required-simplifies BOM and layout. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated PFET/NFET reduces conduction loss and eliminates need for external Schottky diode-cuts solution size and improves light-load efficiency. |
| Internal compensation | Eliminates external compensation network-reduces component count and design validation effort for standard 1 µH / 10 µF configurations. |
| Power save mode | Automatic transition at ~80 mA load enables >85% efficiency down to 10 µA output current-ideal for intermittent-sensing applications. |
| 100% duty cycle operation | Maintains regulation even as VIN approaches VOUT-supports brownout resilience in battery-powered systems with declining cell voltage. |
| Soft start | Linear output ramp prevents input current surge during startup-avoids tripping USB port current limits or collapsing weak battery sources. |
Applications
| Digital Audio Playback | GPS Navigation Unit |
|---|---|
Use Scenario: Powers DAC, headphone amplifier, and flash memory in portable media players with single Li-ion cell supply. IC Role / Device Role / Timing Role: Primary 1.82 V core rail regulator delivering clean, low-noise power with fast line/load transient response. Use Value: 3 MHz switching avoids audible beat frequencies; 18 µA quiescent current extends playback time between charges. | Use Scenario: Supplies 1.82 V logic rail to GPS baseband processor and RF front-end in automotive or handheld navigation devices. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling continuous satellite acquisition under varying battery voltage (3.0–4.2 V). Use Value: 100% duty cycle maintains regulation during cold cranking (VIN dip to 2.5 V); thermal shutdown protects against enclosure overheating. |
| Wireless Handset Baseband | PDA Application Processor |
Use Scenario: Provides 1.82 V I/O or core voltage to baseband SoC in 2G/3G feature phones with alkaline/NiMH battery packs. IC Role / Device Role / Timing Role: Compact, low-ESR DC-DC stage replacing linear regulators to reduce heat and extend talk time. Use Value: 5-ball WLCSP footprint (<0.64 mm²) saves PCB area; 95% efficiency cuts power dissipation by >50% vs. LDO. | Use Scenario: Powers ARM-based application processor in palm-sized PDAs using dual AA/AAA cells or USB 5 V input. IC Role / Device Role / Timing Role: Main system regulator supporting dynamic voltage scaling and rapid wake-from-sleep transitions. Use Value: Power save mode enables <20 µA system standby; EN pin allows precise sequencing with host PMIC. |
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 1.8 V output (±1%), 3 MHz, 600 mA, 5-pin WSON; higher 22 µA IQ, no power save mode hysteresis spec. | Requires tighter output tolerance but lacks automatic PSM entry/exit optimization-less efficient below 50 mA. | Select when absolute 1.80 V (not 1.82 V) is required and board space permits slightly larger WSON package. |
| RT8059NGQW | Fixed 1.8 V output, 3 MHz, 600 mA, 6-ball WLCSP; 25 µA IQ, no 100% duty cycle mode, thermal shutdown at 145°C. | Lacks dropout resilience at low VIN; higher shutdown current may impact ultra-low-power sleep budgets. | Prefer for cost-sensitive designs where 1.82 V precision and cold-cranking support are non-critical. |
Compared with TPS62231DRYR and RT8059NGQW, the ADP2108ACBZ-1.82R7 delivers tighter 1.82 V output alignment for specific SoC core rails, superior light-load efficiency via optimized PSM hysteresis, and guaranteed 100% duty operation-making it optimal for battery-fed portable systems demanding long runtime and voltage margin.
Availability
ADP2108ACBZ-1.82R7 is available at Aetrix Electronics and suitable for digital audio playback, GPS navigation units, wireless handset baseband, and PDA application processor power rails requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for ADP2108ACBZ-1.82R7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications.
The ADP2108 product line delivers compact, high-efficiency DC-DC conversion for battery-powered portable electronics-designed to replace linear regulators with minimal layout change while maximizing runtime and thermal headroom.
FAQ
What is the output voltage tolerance of the ADP2108ACBZ-1.82R7 under full load and temperature range?
The ADP2108ACBZ-1.82R7 guarantees ±2.5% output voltage accuracy across 2.3 V to 5.5 V input, −40°C to +125°C junction temperature, and full 0–600 mA load range in PWM mode. At 25°C and nominal input, typical deviation is ±2%, confirmed by Figure 6 (output voltage vs. temperature) and Table 1 specifications.
Does the ADP2108ACBZ-1.82R7 require external feedback resistors?
No, the ADP2108ACBZ-1.82R7 is a fixed-output variant with internal feedback divider set for 1.82 V. The FB pin connects directly to the output capacitor and requires no external resistors-reducing BOM count and eliminating resistor tolerance errors that affect regulation accuracy.
Can the ADP2108ACBZ-1.82R7 operate with a 2.4 V input supply?
Yes, the ADP2108ACBZ-1.82R7 supports input voltages from 2.3 V to 5.5 V. At 2.4 V input, it enters 100% duty cycle mode to maintain 1.82 V output, as verified in the "100% Duty Operation" section (Page 12) and Figure 10 load regulation curves showing stable regulation down to VIN = 2.7 V.
What is the thermal resistance (θJA) of the ADP2108ACBZ-1.82R7 package?
The ADP2108ACBZ-1.82R7 uses a 5-ball WLCSP package with θJA = 105°C/W when mounted on a JEDEC 2S2P test board, per Table 3 on Page 4 of the datasheet. This value assumes standard 2-layer PCB construction with thermal vias under the exposed die pad.
How does the ADP2108ACBZ-1.82R7 handle short-circuit conditions?
The ADP2108ACBZ-1.82R7 implements frequency foldback protection: when FB voltage drops below 50% of target (indicating hard short), switching frequency halves from 3 MHz to ~1.5 MHz. This extends off-time, limits inductor energy buildup, and prevents runaway current-detailed in the "Short-Circuit Protection" section (Page 12).
ADP2108ACBZ-1.82R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-WFBGA, WLCSP
- 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):
- 1.82V
- 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-1.82R7 FAQ
1.How can I place an order for ADP2108ACBZ-1.82R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2108ACBZ-1.82R7 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-1.82R7 reliable?
The price and inventory of ADP2108ACBZ-1.82R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2108ACBZ-1.82R7 is usually 5 days.
3.What payment methods are accepted for ADP2108ACBZ-1.82R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2108ACBZ-1.82R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2108ACBZ-1.82R7?
ADP2108ACBZ-1.82R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2108ACBZ-1.82R7 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-1.82R7?
For technical support, including ADP2108ACBZ-1.82R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2108ACBZ-1.82R7 requirements.
6.How does Aetrix verify that ADP2108ACBZ-1.82R7 is sourced from the original manufacturer or authorized distributors?
All ADP2108ACBZ-1.82R7 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-1.82R7 meets industry standards.
7.What is the process for return or replacement of ADP2108ACBZ-1.82R7?
All ADP2108ACBZ-1.82R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2108ACBZ-1.82R7, 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-1.82R7 part is unused and in its original packaging.
Return procedure for ADP2108ACBZ-1.82R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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