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Analog Devices Inc. ADP2121ACBZ-1.8-R7
- Part No.:
- ADP2121ACBZ-1.8-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFBGA, WLCSP
- Datasheet:
-
ADP2121ACBZ-1.8-R7.pdf
- Description:
- IC REG BUCK 1.8V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
ADP2121ACBZ-1.8-R7 from Analog Devices is a 6 MHz synchronous step-down DC-DC converter delivering up to 600 mA at fixed 1.8 V output, operating from 2.3 V to 5.5 V input, with 92% peak efficiency and 36 µA quiescent current in auto mode-designed for battery-powered portable systems requiring ultra-small footprint and extended runtime.
For engineers reviewing the ADP2121ACBZ-1.8-R7 datasheet, ADP2121ACBZ-1.8-R7 pinout, ADP2121ACBZ-1.8-R7 application, or ADP2121ACBZ-1.8-R7 equivalent, key selection considerations include its 6-ball WLCSP package, auto/PWM mode control via MODE pin, internal compensation, and compatibility with 0.47 µH multilayer inductors for space-constrained mobile power rails.
Technical Context
The ADP2121ACBZ-1.8-R7 implements a hybrid voltage-mode PWM control architecture with automatic PFM/PWM transition based on load current, enabling stable regulation across 1 mA–600 mA while minimizing switching losses at light loads. Its 6 MHz oscillator frequency supports sub-millimeter passive component sizing without compromising transient response.
Internal synchronous rectification eliminates external Schottky diode requirements, and integrated soft start (75 µs typical), cycle-by-cycle current limit (≥790 mA), undervoltage lockout (2.1 V rising threshold), and thermal shutdown (150°C) provide robust system-level protection without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±3% - eliminates external feedback resistor network; optimized for core logic or memory I/O rails. |
| Max Output Current | 600 mA at VIN ≥ 2.7 V - sufficient for single-core ARM processors or high-speed sensor interfaces. |
| Switching Frequency | 6 MHz (5.36–6.64 MHz) - enables use of 0.47 µH, 0402-size inductors and 2.2 µF/4.7 µF ceramic capacitors. |
| Quiescent Current | 36 µA (auto mode, no load) - extends battery life in always-on standby states of portable devices. |
| Input Voltage Range | 2.3 V to 5.5 V - supports single-cell Li+/Li− polymer, 3× alkaline/Ni-MH, and USB-powered operation. |
| Efficiency | 92% peak at 150 mA (VIN = 2.7 V, VOUT = 1.8 V) - reduces thermal load in sealed enclosures. |
| Shutdown Current | 0.3 µA (typical) - ensures negligible drain during deep sleep or system off states. |
Pinout & Package
ADP2121ACBZ-1.8-R7 uses an ultrasmall 6-ball, 0.4 mm pitch, 1.17 mm² wafer-level chip-scale package (WLCSP) with bottom-side solder bumps. Thermal performance depends on PCB layout: θJA = 198°C/W (2-layer) or 105°C/W (4-layer).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Logic input selecting auto (PFM/PWM) or forced PWM mode; must be pulled low for power-saving operation. |
| B1 | SW | Switch node connecting internal P-channel high-side and N-channel synchronous rectifier MOSFETs. |
| C1 | FB | Feedback input tied directly to output capacitor; sets regulation point for fixed 1.8 V version (no external divider). |
| A2 | VIN | Main power input (2.3–5.5 V); requires local 2.2 µF X5R ceramic decoupling placed adjacent to ball. |
| B2 | EN | Enable input with 1.3 V high threshold; drives device into <0.3 µA shutdown when ≤0.4 V. |
| C2 | GND | Power ground reference for internal circuits and switch node return path; requires low-impedance PCB connection. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency by ~5–8% vs. asynchronous designs. |
| Auto Mode Power-Saving | Automatically transitions between PFM (light load) and PWM (heavy load) to maintain >85% efficiency from 1 mA to 600 mA. |
| Ultrasmall WLCSP Package | 1.17 mm² footprint enables placement in tight spaces such as camera modules or wearable sensor nodes. |
| Internal Compensation | Removes need for external compensation network; simplifies design and reduces BOM count by two components. |
| Output Short-Circuit Protection | Active current limiting and hiccup-mode recovery prevent damage during accidental GND shorts at output. |
Applications
| Mobile Phone Baseband Power | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powers baseband processor core rail in slim smartphone designs where board area and battery life are critical. IC Role / Device Role / Timing Role: Primary 1.8 V step-down regulator supplying CPU core logic with fast load transient response (<20 µs settling). Use Value: 6 MHz switching allows 0.47 µH inductor integration within 1.5 mm² total solution size, reducing PCB real estate by 40% vs. 1 MHz alternatives. |
Use Scenario: Supplies regulated 1.8 V bias to CMOS image sensor analog front-end in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise, high-efficiency power source with <3% output accuracy ensuring consistent pixel gain calibration. Use Value: 36 µA quiescent current extends standby time between photo captures; auto mode maintains >80% efficiency at 5 mA dark-current load. |
| Portable Audio Codec Supply | Wireless Headset Bluetooth SoC Core |
|
Use Scenario: Delivers clean 1.8 V supply to stereo audio codec IC in battery-powered Bluetooth speakers. IC Role / Device Role / Timing Role: Noise-sensitive LDO-replacement DC-DC with internal soft-start (75 µs) preventing pop/click artifacts during power-up. Use Value: 92% peak efficiency minimizes heat near audio amplifiers; 0.4 mm pitch WLCSP fits under codec QFN body. |
Use Scenario: Powers Bluetooth 5.0 SoC application processor core in true wireless stereo (TWS) earbuds. IC Role / Device Role / Timing Role: High-frequency buck converter supporting dynamic voltage scaling during BLE advertising/connection bursts. Use Value: 600 mA capability handles 400 mA peak SoC current spikes; 0.3 µA shutdown current preserves battery over multi-week storage. |
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 |
|---|---|---|---|
| TI TPS62231DRYR | Fixed 1.8 V, 600 mA, 3.6 MHz, 2.05–6.0 V input; higher quiescent current (12 µA PWM, 18 µA PFM); 6-pin WSON package. | Larger 2.0 × 2.0 mm WSON vs. ADP2121ACBZ-1.8-R7's 1.17 mm² WLCSP; less suitable for ultra-thin wearables. | Select when board layout allows larger package and higher input voltage range (up to 6.0 V) is required. |
| ROHM BD9A100MUV | Fixed 1.8 V, 600 mA, 3.0 MHz, 2.7–5.5 V input; 25 µA quiescent current; 6-pin UQFN package (1.6 × 1.6 mm). | Lower switching frequency increases inductor size; UQFN requires reflow-compatible stencil design unlike WLCSP. | Prefer for cost-sensitive industrial portable designs where 3 MHz operation and larger footprint are acceptable. |
Compared with TPS62231DRYR and BD9A100MUV, the ADP2121ACBZ-1.8-R7 delivers superior space efficiency (1.17 mm² vs. ≥2.56 mm²), higher switching frequency (6 MHz vs. ≤3.6 MHz), and lower quiescent current in auto mode (36 µA vs. ≥25 µA), making it optimal for next-gen compact battery-powered devices.
Availability
ADP2121ACBZ-1.8-R7 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, portable audio equipment, wireless headsets, and IoT edge sensors requiring stable component supply with minimal PCB footprint and extended battery runtime.
Supply support for ADP2121ACBZ-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, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.
The ADP2121 series targets ultra-portable electronics, delivering high-efficiency, high-frequency DC-DC conversion in wafer-level packages to address shrinking board area and increasing battery life demands in consumer and medical wearables.
FAQ
What is the guaranteed maximum output current for ADP2121ACBZ-1.8-R7 across its input voltage range?
The ADP2121ACBZ-1.8-R7 guarantees 600 mA continuous output current when VIN is 2.7 V to 5.5 V. At lower inputs, the rating scales linearly: 500 mA at VIN = 2.5 V and 300 mA at VIN = 2.3 V. These limits are validated per Table 2 in the Rev. C datasheet and apply to the 1.8 V output variant specifically.
Does ADP2121ACBZ-1.8-R7 require external compensation components?
No, ADP2121ACBZ-1.8-R7 features fully internal compensation. The control loop is factory-tuned for stability with standard 0.47 µH inductors and 4.7 µF output capacitors, eliminating external RC networks and reducing design risk and BOM count.
How does the MODE pin affect operation of ADP2121ACBZ-1.8-R7?
When MODE is pulled low, ADP2121ACBZ-1.8-R7 operates in auto mode-dynamically switching between PFM (light load) and PWM (heavy load). When MODE is pulled high, it forces fixed-frequency PWM operation regardless of load, useful for noise-sensitive applications requiring deterministic switching.
What package type and mounting requirements apply to ADP2121ACBZ-1.8-R7?
ADP2121ACBZ-1.8-R7 uses a 6-ball WLCSP (1.17 mm², 0.4 mm pitch) with solder bumps on the silicon die underside. It requires microvia-in-pad PCB design, controlled-depth reflow, and adherence to JEDEC J-STD-020 moisture sensitivity level (MSL) 1 handling guidelines.
Can ADP2121ACBZ-1.8-R7 safely drive a 1.8 V FPGA I/O bank?
Yes-ADP2121ACBZ-1.8-R7 delivers 1.8 V ±3% output accuracy across temperature and line/load conditions, supports 600 mA peak current, and provides fast transient response (<20 µs) verified in Figures 25–39. Its internal soft start prevents inrush current that could disrupt FPGA configuration sequencing.
ADP2121ACBZ-1.8-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-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):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (0.9x1.3)
ADP2121ACBZ-1.8-R7 FAQ
1.How can I place an order for ADP2121ACBZ-1.8-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2121ACBZ-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 ADP2121ACBZ-1.8-R7 reliable?
The price and inventory of ADP2121ACBZ-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 ADP2121ACBZ-1.8-R7 is usually 5 days.
3.What payment methods are accepted for ADP2121ACBZ-1.8-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2121ACBZ-1.8-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2121ACBZ-1.8-R7?
ADP2121ACBZ-1.8-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2121ACBZ-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 ADP2121ACBZ-1.8-R7?
For technical support, including ADP2121ACBZ-1.8-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2121ACBZ-1.8-R7 requirements.
6.How does Aetrix verify that ADP2121ACBZ-1.8-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2121ACBZ-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 ADP2121ACBZ-1.8-R7 meets industry standards.
7.What is the process for return or replacement of ADP2121ACBZ-1.8-R7?
All ADP2121ACBZ-1.8-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2121ACBZ-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 ADP2121ACBZ-1.8-R7 part is unused and in its original packaging.
Return procedure for ADP2121ACBZ-1.8-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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