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Analog Devices Inc. ADP2121ACBZ-1.82R7
- Part No.:
- ADP2121ACBZ-1.82R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFBGA, WLCSP
- Datasheet:
-
ADP2121ACBZ-1.82R7.pdf
- Description:
- IC REG BUCK 1.82V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
ADP2121ACBZ-1.82R7 from Analog Devices is a 6 MHz synchronous step-down DC-DC converter delivering up to 600 mA output current with fixed 1.82 V output, 2.3 V–5.5 V input range, and 92% peak efficiency. It integrates internal synchronous rectification, soft start, and output short-circuit protection, targeting space-constrained portable power rails for baseband processors or memory I/O in mobile phones and digital cameras.
For engineers reviewing the ADP2121ACBZ-1.82R7 datasheet, ADP2121ACBZ-1.82R7 pinout, ADP2121ACBZ-1.82R7 application, or ADP2121ACBZ-1.82R7 equivalent, key selection criteria include its 6 MHz switching frequency enabling 0.47 µH inductor use, auto/PWM mode control via MODE pin, ultrasmall 6-ball WLCSP package, and guaranteed 600 mA load capability at VIN ≥ 2.7 V.
Technical Context
The ADP2121ACBZ-1.82R7 employs a hybrid voltage-mode PWM control architecture with integrated 6 MHz oscillator, supporting both forced PWM and automatic PFM/PWM transition based on load current. Its internal compensation eliminates external loop components, while cycle-by-cycle current limiting and thermal shutdown ensure robust operation under fault conditions.
It features dual operating modes: PWM mode maintains constant 6 MHz switching across all loads, while auto mode dynamically switches between PFM (light load) and PWM (medium/heavy load) to optimize quiescent current-36 µA typical in auto mode versus 10 mA in PWM mode at no load-extending battery life without sacrificing transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.82 V ±3% - precisely regulated rail for low-voltage logic cores requiring tight tolerance. |
| Max Output Current | 600 mA at VIN ≥ 2.7 V - sufficient for powering ARM Cortex-A/M series baseband ICs or LPDDR I/O. |
| Switching Frequency | 6 MHz (5.36–6.64 MHz) - enables use of sub-1 mm² 0.47 µH multilayer inductors and compact 0402 ceramic capacitors. |
| Quiescent Current | 36 µA typical in auto mode - minimizes standby power loss in always-on subsystems like audio codecs. |
| Input Voltage Range | 2.3 V to 5.5 V - supports single-cell Li+/Li− polymer, 3× alkaline/Ni-MH, or USB-powered systems. |
| Package | 6-ball, 0.4 mm pitch, 1.17 mm² WLCSP - ultra-compact footprint for thin mobile PCBs with minimal board area impact. |
| Protection Features | Output-to-ground short-circuit, thermal shutdown (150°C), undervoltage lockout, and cycle-by-cycle current limit - ensures safe operation without external supervision circuitry. |
Pinout & Package
ADP2121ACBZ-1.82R7 uses a 6-ball Wafer-Level Chip Scale Package (WLCSP) with 0.4 mm ball pitch and 1.17 mm² footprint. The package is bottom-side bumped; balls are arranged in a 2×3 grid (A1, A2, B1, B2, C1, C2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Mode select input: low = auto (PFM/PWM), high = forced PWM; must be actively driven-no floating allowed. |
| A2 | VIN | Main power input (2.3–5.5 V); requires local 2.2 µF ceramic capacitor placed adjacent to ball for EMI suppression. |
| B1 | SW | Switch node connecting internal P-channel high-side and N-channel synchronous rectifier MOSFETs; drives external inductor. |
| B2 | EN | Enable logic input: high ≥1.3 V enables regulator, low ≤0.4 V disables with <0.3 µA shutdown current. |
| C1 | FB | Feedback input tied directly to output; internal resistor divider sets 1.82 V - no external resistors required. |
| C2 | GND | Power ground reference; must be connected to low-impedance PCB ground plane beneath package for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency by >10% vs. asynchronous designs at 300–600 mA loads. |
| Auto Mode Power Saving | Reduces quiescent current to 36 µA at light loads via PFM operation, extending battery runtime in idle/standby states of portable devices. |
| Ultrasmall WLCSP Package | 1.17 mm² footprint with 0.4 mm pitch enables integration into <3 mm × 3 mm system-in-package (SiP) modules or ultra-thin smartphones. |
| Integrated Soft Start | 275 µs typical startup time for 1.82 V output prevents inrush current and output overshoot during power-up sequencing. |
| Full Protection Suite | Includes output short-circuit, thermal shutdown (150°C), UVLO, and cycle-by-cycle current limit-no external fault management needed. |
Applications
| Mobile Phone Baseband Power | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powers ARM-based application processor I/O or modem baseband core in slim smartphone designs with single-cell Li+ battery. IC Role / Device Role / Timing Role: Primary 1.82 V buck regulator supplying stable, low-noise power to memory interfaces and digital signal processing blocks. Use Value: 6 MHz switching allows 0.47 µH inductor and 4.7 µF output capacitor-reducing total solution size to <2.5 mm² while maintaining 92% efficiency at 400 mA. |
Use Scenario: Supplies regulated 1.82 V bias to CMOS image sensor analog front-end and column ADC in compact digital cameras. IC Role / Device Role / Timing Role: Low-quiescent-current DC-DC converter delivering clean, ripple-controlled voltage during burst capture and standby modes. Use Value: 36 µA auto-mode IQ extends camera standby time beyond 72 hours on a 300 mAh battery, with fast load transient recovery (<20 µs) preventing image artifacts. |
| Portable Audio Codec Supply | Wearable Fitness Tracker Core Rail |
|
Use Scenario: Generates 1.82 V supply for stereo audio codec DSP and DAC in Bluetooth headphones or portable speakers. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with integrated soft start and short-circuit protection for audio subsystem power domain. Use Value: Internal compensation and fixed 1.82 V output eliminate trimming components; 92% peak efficiency at 200 mA reduces thermal load in sealed enclosures. |
Use Scenario: Provides main 1.82 V core voltage for ultra-low-power MCU and sensor hub in wrist-worn fitness trackers powered by coin-cell or micro-Li+. IC Role / Device Role / Timing Role: Compact, low-IQ step-down regulator enabling continuous heart-rate monitoring with sub-10 µA system sleep current. Use Value: 0.3 µA shutdown current and 275 µs soft-start enable rapid wake/sleep cycling; WLCSP package fits within 5 mm × 5 mm PCB real estate constraints. |
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 TPS622313DRYR | Fixed 1.8 V output (not 1.82 V); 3 MHz switching; 650 mA max; 6-pin WSON package (2 mm × 2 mm) | Larger footprint (4× area), lower frequency limits inductor miniaturization; lacks auto mode-uses forced PWM only | Select when 1.8 V tolerance suffices and board layout permits larger package; avoid if 1.82 V precision or ultra-low IQ is required. |
| Maxim Integrated MAX17222ELT+T | Adjustable output (0.6–5.5 V) via external resistors; 2.5 MHz; 500 mA max; 6-pin WLP (1.53 mm²) | Requires two external resistors and compensation components; lower current rating limits use in high-core-count SoCs | Choose for design flexibility where adjustable voltage is needed; not drop-in for ADP2121ACBZ-1.82R7 due to different feedback architecture and reduced current capability. |
Compared with TPS622313DRYR and MAX17222ELT+T, ADP2121ACBZ-1.82R7 offers exact 1.82 V regulation, 6 MHz operation enabling smallest passive components, and lowest auto-mode quiescent current-making it optimal for space- and battery-life-critical portable applications where fixed 1.82 V is specified.
Availability
ADP2121ACBZ-1.82R7 is available at Aetrix Electronics and suitable for mobile phone baseband power, digital camera image sensor bias, and portable audio codec supply requiring stable component supply, long-lifecycle support, and traceable sourcing for volume production.
Supply support for ADP2121ACBZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and consumer markets.
The ADP2121 belongs to Analog Devices' ultra-compact, high-frequency DC-DC converter product line, designed specifically for battery-powered portable electronics where minimal PCB area, extended runtime, and precise low-voltage regulation are critical.
FAQ
What is the guaranteed maximum output current for ADP2121ACBZ-1.82R7?
The ADP2121ACBZ-1.82R7 guarantees 600 mA continuous output current when input voltage is 2.7 V to 5.5 V. At lower inputs (2.3–2.5 V), the guaranteed current scales linearly from 300 mA to 500 mA. This rating is validated across −40°C to +125°C junction temperature and applies with proper thermal layout using a 4-layer PCB.
Does ADP2121ACBZ-1.82R7 require external compensation components?
No, ADP2121ACBZ-1.82R7 features internal compensation, eliminating the need for external RC networks or type-II/type-III compensators. This simplifies design, reduces bill-of-materials count, and ensures stable operation with the recommended 0.47 µH inductor and 4.7 µF output capacitor across all operating conditions.
How does the MODE pin affect ADP2121ACBZ-1.82R7 operation?
The MODE pin on ADP2121ACBZ-1.82R7 selects between auto mode (MODE = low) and forced PWM mode (MODE = high). In auto mode, the device transitions between PFM (light load, 36 µA IQ) and PWM (heavy load, 6 MHz) automatically. In PWM mode, it operates continuously at 6 MHz regardless of load-critical for noise-sensitive applications.
What is the typical startup time for ADP2121ACBZ-1.82R7?
The typical startup time for ADP2121ACBZ-1.82R7 is 275 µs from EN ≥ 1.2 V to stable 1.82 V output under 5.1 Ω load, per Table 1 and Figure 41 in the Rev. C datasheet. This soft-start duration prevents inrush current and ensures controlled power-rail ramp-up during system initialization sequences.
Can ADP2121ACBZ-1.82R7 operate from a single 3× alkaline battery?
Yes, ADP2121ACBZ-1.82R7 supports input voltages from 2.3 V to 5.5 V, fully covering the discharge range of three alkaline cells (nominal 4.5 V, end-of-life ~3.0 V). Its undervoltage lockout activates at ~2.1 V (rising) and ~2.0 V (falling), ensuring reliable dropout behavior without brownout operation.
ADP2121ACBZ-1.82R7 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):
- 1.82V
- 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-1.82R7 FAQ
1.How can I place an order for ADP2121ACBZ-1.82R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2121ACBZ-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 ADP2121ACBZ-1.82R7 reliable?
The price and inventory of ADP2121ACBZ-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 ADP2121ACBZ-1.82R7 is usually 5 days.
3.What payment methods are accepted for ADP2121ACBZ-1.82R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2121ACBZ-1.82R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2121ACBZ-1.82R7?
ADP2121ACBZ-1.82R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2121ACBZ-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 ADP2121ACBZ-1.82R7?
For technical support, including ADP2121ACBZ-1.82R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2121ACBZ-1.82R7 requirements.
6.How does Aetrix verify that ADP2121ACBZ-1.82R7 is sourced from the original manufacturer or authorized distributors?
All ADP2121ACBZ-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 ADP2121ACBZ-1.82R7 meets industry standards.
7.What is the process for return or replacement of ADP2121ACBZ-1.82R7?
All ADP2121ACBZ-1.82R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2121ACBZ-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 ADP2121ACBZ-1.82R7 part is unused and in its original packaging.
Return procedure for ADP2121ACBZ-1.82R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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