My Inquiry
My Account
Analog Devices Inc. ADP2121ACBZ-2.3-R7
- Part No.:
- ADP2121ACBZ-2.3-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFBGA, WLCSP
- Datasheet:
-
ADP2121ACBZ-2.3-R7.pdf
- Description:
- IC REG BUCK 2.3V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,860
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADP2121ACBZ-2.3-R7 from Analog Devices is a 6 MHz synchronous step-down DC-to-DC converter delivering up to 600 mA output current with fixed 2.3 V output, 2.9 V–5.5 V input range, and 92% peak efficiency. It integrates synchronous rectification, internal compensation, soft start, and output short-circuit protection for compact portable power rails.
For engineers reviewing the ADP2121ACBZ-2.3-R7 datasheet, ADP2121ACBZ-2.3-R7 pinout, ADP2121ACBZ-2.3-R7 application, or ADP2121ACBZ-2.3-R7 equivalent, key selection criteria include its ultrasmall 6-ball WLCSP package, auto/PWM mode control via MODE pin, 36 µA quiescent current in auto mode, and compatibility with 0.47 µH multilayer inductors.
Technical Context
The ADP2121ACBZ-2.3-R7 employs a hybrid voltage-mode PWM control architecture operating at 6 MHz (5.36–6.64 MHz) with cycle-by-cycle current limiting and internal soft-start timing of 100–115 µs for 2.3 V output. Its auto mode dynamically transitions between PFM (light load) and PWM (medium/heavy load) based on load current thresholds that vary with input voltage.
It features dual MOSFET integration - P-channel high-side switch (220–440 mΩ RDS(on)) and N-channel synchronous rectifier (260–550 mΩ RDS(on)) - with undervoltage lockout (2.4–2.6 V rising threshold for 2.3 V output) and thermal shutdown at 150 °C with 15 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.3 V ±3% accuracy; requires no external feedback resistors. |
| Input Voltage Range | 2.9 V to 5.5 V - supports single Li+/Li− polymer or 3-cell alkaline/Ni-MH sources. |
| Max Output Current | 600 mA continuous - guaranteed across full input range when VIN ≥ 2.9 V. |
| Switching Frequency | 6 MHz typical (5.36–6.64 MHz) - enables use of sub-1 mm² 0.47 µH ceramic inductors. |
| Quiescent Current | 36 µA typical in auto mode - extends battery life in always-on portable subsystems. |
| Shutdown Current | 0.4 µA typical - isolates input from output during logic-controlled disable (EN ≤ 0.4 V). |
| Package | 6-ball, 0.4 mm pitch, 1.17 mm² WLCSP - optimized for space-constrained mobile PCB layouts. |
Pinout & Package
ADP2121ACBZ-2.3-R7 uses an ultrasmall 6-ball Wafer-Level Chip Scale Package (WLCSP) with 0.4 mm ball pitch and bottom-side bump configuration. Thermal resistance is 105 °C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Mode select input: low = auto (PFM/PWM), high = forced PWM; must not float or exceed VIN. |
| B1 | SW | Switch node: connects to inductor and diode-free synchronous rectifier path. |
| C1 | FB | Feedback input: internally tied to 2.3 V reference; no external resistor divider required. |
| A2 | VIN | Main power input: accepts 2.9–5.5 V; requires local 2.2 µF X5R ceramic capacitor. |
| B2 | EN | Enable logic input: high ≥1.3 V enables regulator; low ≤0.4 V disables with <0.4 µA draw. |
| C2 | GND | Power ground: shared analog/digital return; must be low-inductance connection to CIN/COUT. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Rectification | Eliminates external Schottky diode, reducing BOM count and improving efficiency at all loads. |
| Auto Mode with PFM/PWM Transition | Reduces light-load quiescent current to 36 µA while maintaining 6 MHz regulation under heavy load. |
| Integrated Soft Start | 100–115 µs startup time for 2.3 V output - prevents inrush current and stabilizes VOUT before system wake-up. |
| Output Short-Circuit Protection | Active clamping limits SW node to 1.24 V during GND fault - protects IC and inductor without latch-off. |
| Thermal Shutdown with Hysteresis | Shuts down at 150 °C junction temperature and resumes only after cooling by ≥15 °C - prevents thermal cycling. |
Applications
| Mobile Phone Core Logic Rail | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powering ARM Cortex-A/M series application processors' I/O or core domains in slim smartphones. IC Role / Device Role / Timing Role: Primary 2.3 V point-of-load regulator with fast transient response to CPU burst loads. Use Value: 6 MHz switching minimizes inductor size to fit within 1.5 mm height budget; 36 µA quiescent current preserves standby battery life. |
Use Scenario: Supplying bias voltage to CMOS image sensors requiring stable low-noise 2.3 V rail. IC Role / Device Role / Timing Role: Low-ripple, low-noise DC/DC converter with integrated soft start to prevent sensor initialization glitches. Use Value: Internal compensation eliminates external loop components; 92% peak efficiency reduces thermal load near optical module. |
| Portable Audio Codec Power | Wireless Headset Bluetooth SoC Core |
|
Use Scenario: Delivering clean 2.3 V supply to stereo audio codecs in battery-powered headphones. IC Role / Device Role / Timing Role: High PSRR step-down regulator with minimal output ripple (<10 mVpp) in auto mode. Use Value: 6 MHz operation avoids AM radio band interference; ultrasmall WLCSP eases routing in tight RF/audio partitioned layouts. |
Use Scenario: Powering Bluetooth 5.x SoC cores in true wireless stereo (TWS) earbuds with strict size constraints. IC Role / Device Role / Timing Role: Ultra-compact, high-efficiency buck converter enabling >4-hour playback on 45 mAh cell. Use Value: 1.17 mm² footprint saves >0.5 mm² PCB area vs. comparable QFN; 0.4 µA shutdown current enables multi-week shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 2.3 V output; 6 MHz switching; 600 mA rating; 3.5 µA quiescent current in DCM mode - higher than ADP2121ACBZ-2.3-R7's 36 µA. | Requires external feedback for non-standard voltages; lacks integrated short-circuit clamping (relies on external current limit). | Preferred where ultra-low IQ is secondary to cost-sensitive volume production with TI supply chain alignment. |
| MAX8640YETA+ | Fixed 2.3 V output; 4 MHz switching; 600 mA rating; 25 µA quiescent current - lower than ADP2121ACBZ-2.3-R7 but slower frequency limits inductor miniaturization. | Uses 10-pin 3 mm × 3 mm TDFN - 5× larger footprint than ADP2121ACBZ-2.3-R7's 1.17 mm² WLCSP. | Selected when thermal margin is prioritized over board area, or when legacy MAX8640 design reuse is required. |
Compared with TPS62231DRYR and MAX8640YETA+, ADP2121ACBZ-2.3-R7 delivers superior light-load efficiency in the smallest footprint, with integrated protection features that reduce external component count and improve reliability in space- and battery-limited portable systems.
Availability
ADP2121ACBZ-2.3-R7 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, portable audio devices, and wireless headsets requiring stable component supply with guaranteed long-term availability.
Supply support for ADP2121ACBZ-2.3-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 ADP2121 family was designed specifically for ultra-compact, battery-optimized DC/DC conversion in portable consumer electronics, emphasizing minimal footprint, low quiescent current, and seamless integration with tiny passive components.
FAQ
What is the input voltage range for ADP2121ACBZ-2.3-R7?
The ADP2121ACBZ-2.3-R7 operates with an input voltage range of 2.9 V to 5.5 V - specifically defined for its fixed 2.3 V output variant. This range supports single-cell Li+/Li− polymer batteries and 3-cell alkaline/Ni-MH configurations. Operation below 2.9 V is not guaranteed and may trigger undervoltage lockout (rising threshold: 2.4–2.6 V).
Does ADP2121ACBZ-2.3-R7 require external feedback resistors?
No. ADP2121ACBZ-2.3-R7 has an internally trimmed 2.3 V reference connected directly to the FB pin, eliminating the need for external resistor dividers. The FB pin is used solely for loop stability and must be routed with minimal trace length to the output capacitor.
How does the MODE pin affect ADP2121ACBZ-2.3-R7 operation?
The MODE pin selects between auto mode (MODE = low) and forced PWM mode (MODE = high). In auto mode, ADP2121ACBZ-2.3-R7 switches between PFM (light load) and PWM (medium/heavy load); in PWM mode, it maintains constant 6 MHz operation regardless of load. MODE must never float or exceed VIN.
What protection features are integrated into ADP2121ACBZ-2.3-R7?
ADP2121ACBZ-2.3-R7 includes cycle-by-cycle current limiting, output-to-ground short-circuit protection (clamps SW to 1.24 V), undervoltage lockout, thermal shutdown (150 °C with 15 °C hysteresis), and internal soft start. These functions protect both the IC and external circuitry without requiring additional discrete components.
Is ADP2121ACBZ-2.3-R7 compatible with 0.47 µH inductors?
Yes. ADP2121ACBZ-2.3-R7 is characterized and optimized for use with 0.47 µH multilayer ceramic inductors such as the LQM2HPNR47MG0L (1008 case) and similar 0603/0805 footprints. Its 6 MHz switching frequency allows these small inductors to meet ripple and transient requirements without saturation.
ADP2121ACBZ-2.3-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):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.3V
- 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-2.3-R7 FAQ
1.How can I place an order for ADP2121ACBZ-2.3-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2121ACBZ-2.3-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-2.3-R7 reliable?
The price and inventory of ADP2121ACBZ-2.3-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-2.3-R7 is usually 5 days.
3.What payment methods are accepted for ADP2121ACBZ-2.3-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2121ACBZ-2.3-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2121ACBZ-2.3-R7?
ADP2121ACBZ-2.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2121ACBZ-2.3-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-2.3-R7?
For technical support, including ADP2121ACBZ-2.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2121ACBZ-2.3-R7 requirements.
6.How does Aetrix verify that ADP2121ACBZ-2.3-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2121ACBZ-2.3-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-2.3-R7 meets industry standards.
7.What is the process for return or replacement of ADP2121ACBZ-2.3-R7?
All ADP2121ACBZ-2.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2121ACBZ-2.3-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-2.3-R7 part is unused and in its original packaging.
Return procedure for ADP2121ACBZ-2.3-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP2121ACBZ-2.3-R7 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
