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Analog Devices Inc. ADP2126ACDZ-1.20R7
- Part No.:
- ADP2126ACDZ-1.20R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- Die
- Datasheet:
-
ADP2126ACDZ-1.20R7.pdf
- Description:
- IC REG BUCK 1.2V 500MA DIE
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
ADP2126ACDZ-1.20R7 from Analog Devices is a fixed-output, synchronous step-down DC-to-DC converter delivering 500 mA at 1.20 V with 6 MHz switching frequency, ultralow 0.33 mm profile, and external clock enable (6–27 MHz) for EMI-sensitive portable power rails in camera modules and digital audio systems.
For engineers reviewing the ADP2126ACDZ-1.20R7 datasheet, ADP2126ACDZ-1.20R7 pinout, ADP2126ACDZ-1.20R7 application, or ADP2126ACDZ-1.20R7 equivalent, key selection criteria include its 2.1–5.5 V input range, auto/PWM mode select via MODE pin, spread-spectrum EMI reduction, internal soft start, and output-to-ground short-circuit protection.
Technical Context
The ADP2126ACDZ-1.20R7 uses a hybrid voltage-mode PWM control scheme with cycle-by-cycle current limiting and internal compensation, enabling stable regulation across 2.1–5.5 V input and 0–500 mA load. Its 6 MHz fixed-frequency operation supports sub-1 mm² layout with 1.0 µH inductors and 2.2 µF ceramic capacitors.
It implements dual-mode operation: forced PWM maintains constant frequency under all loads, while auto mode dynamically switches to PFM at light loads using MODE pin control-reducing quiescent current to 300–500 µA and improving battery life. Spread-spectrum modulation dithers switching frequency ±12% to lower peak EMI emissions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.20 V ±2% in PWM mode; ±3% in PFM mode-ensures precise core voltage for low-power processors and image sensors. |
| Max Output Current | 500 mA continuous-supports high-efficiency power delivery to camera ISPs and audio codecs without external current boosting. |
| Input Voltage Range | 2.1 V to 5.5 V-compatible with single Li+/Li-polymer cells, triple-alkaline, or NiMH batteries in space-constrained handheld devices. |
| Switching Frequency | 6 MHz nominal (4.8–6.8 MHz range) with spread spectrum-enables use of tiny 1.0 µH multilayer inductors and reduces EMI filtering requirements. |
| Shutdown Current | 0.3 µA typical-minimizes battery drain during system sleep in always-on camera modules and wearable audio. |
| Quiescent Current | 300–500 µA in auto mode; 12 mA in PWM mode-directly impacts runtime in portable applications with variable load profiles. |
| Thermal Shutdown | 146°C activation with 13°C hysteresis-protects die integrity during sustained high-current operation in sealed enclosures. |
Pinout & Package
ADP2126ACDZ-1.20R7 uses a 6-ball bumped chip package (BUMPED_CHIP), 1.2 mm × 1.2 mm footprint, 0.33 mm max height-optimized for ultrathin mobile PCBs with minimal board area consumption.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MODE) | Mode select input | Pull low for auto (PFM/PWM) mode; pull high for forced PWM-enables dynamic efficiency optimization without firmware intervention. |
| A2 (VIN) | Power supply input | Accepts 2.1–5.5 V input; powers internal circuitry and high-side PMOS gate driver-requires local 2.2 µF ceramic decoupling. |
| B1 (SW) | Switch node | Connects to inductor; carries pulsed current up to 1 A peak-must be routed with low-inductance, wide copper for thermal and EMI performance. |
| B2 (EXTCLK) | External clock enable | Accepts 6–27 MHz clock or logic-high signal (≥1.3 V); enables startup and shutdown control-eliminates need for dedicated enable IC in clock-synchronized systems. |
| C1 (FB) | Feedback input | Internally connected to 1.20 V reference; no external resistor divider required-simplifies design and improves accuracy vs. adjustable regulators. |
| C2 (GND) | Ground reference | System ground return for control loop and power stage-must be tied to low-impedance PGND plane beneath IC for stability and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated PMOS/NMOS power stage eliminates external Schottky diode-reduces conduction loss and improves light-load efficiency by >15% vs. asynchronous designs. |
| Spread-spectrum modulation | ±12% frequency dithering over 6 MHz center-lowers peak EMI by up to 10 dB, easing FCC/CE compliance in RF-dense mobile platforms. |
| Internal soft start | Gradual ramp of peak current limit during startup-prevents input rail collapse and inrush into 2.2 µF output capacitor, eliminating need for external soft-start circuitry. |
| Output short-circuit protection | Auto-retry shutdown at <0.52 V output-limits fault power to <10 mW during GND shorts, preventing thermal runaway and enabling safe recovery after fault removal. |
| Undervoltage lockout | Rising threshold 2.1 V ±0.2 V with 100 mV hysteresis-ensures clean startup only when battery is sufficiently charged, avoiding brownout-induced system resets. |
Applications
| Camera Modules | Digital Audio Processors |
|---|---|
Use Scenario: Powering CMOS image sensor and ISP in smartphone front/rear cameras with strict height and EMI constraints. IC Role / Device Role / Timing Role: Primary 1.20 V core supply regulator with externally synchronized switching to avoid interference with MIPI CSI-2 data lanes. Use Value: 0.33 mm height fits under stacked camera modules; spread spectrum prevents switching noise from corrupting analog pixel signals. |
Use Scenario: Supplying low-noise 1.20 V bias to DSP, DAC, and ADC in Bluetooth headphones and portable DAC/amps. IC Role / Device Role / Timing Role: High PSRR, low-ripple DC-DC converter operating in auto mode to extend battery life during playback and standby. Use Value: 300 µA PFM quiescent current extends playback time; internal compensation avoids audible switching artifacts in audio band. |
| Mobile Phone Baseband | Image Stabilization Systems |
Use Scenario: Delivering regulated 1.20 V to application processor cores in LTE/5G handsets where thermal density and board area are critical. IC Role / Device Role / Timing Role: Compact, high-frequency buck converter with MODE pin control for dynamic power state management across CPU load states. Use Value: 6 MHz operation allows 1.0 µH inductor-reducing solution size by 40% vs. 2.5 MHz alternatives while maintaining transient response. |
Use Scenario: Powering gyroscopes, accelerometers, and OIS motor drivers in optical image stabilization modules inside compact camera lenses. IC Role / Device Role / Timing Role: Low-profile, short-circuit-protected regulator supplying stable 1.20 V under mechanical shock-induced load transients. Use Value: Output-to-ground SCP and thermal shutdown prevent latch-up during lens actuator stall; 0.33 mm height enables integration into lens barrel assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | Fixed 1.2 V output; 2.05–6.0 V input; 3 MHz max switching frequency; 300 mA max output; 6-pin WSON package (1.5 × 1.5 mm, 0.75 mm height). | Limited to 300 mA and lower frequency-less suitable for high-current camera ISPs but offers wider input range and simpler enable logic. | Select TPS62260DRVR if input exceeds 5.5 V or board height budget allows 0.75 mm; not drop-in due to lower current and different pinout. |
| RT8059GJ6 | Fixed 1.2 V output; 2.5–5.5 V input; 6 MHz switching; 600 mA max output; 6-pin DFN (1.5 × 1.5 mm, 0.55 mm height); no spread spectrum or EXTCLK enable. | Higher current rating but lacks external clock sync and EMI reduction-better for cost-sensitive non-RF applications where timing alignment isn't required. | Choose RT8059GJ6 for higher load margin in non-EMI-critical audio subsystems; requires redesign for clock synchronization and lacks auto-mode PFM. |
Compared with TPS62260DRVR and RT8059GJ6, ADP2126ACDZ-1.20R7 uniquely combines 500 mA capability, 0.33 mm height, spread-spectrum EMI control, and external clock enable-making it optimal for space- and noise-constrained mobile imaging and audio power rails where timing coordination and ultra-low profile are mandatory.
Availability
ADP2126ACDZ-1.20R7 is available at Aetrix Electronics and suitable for camera modules, digital audio processors, and image stabilization systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for consumer electronics production.
Supply support for ADP2126ACDZ-1.20R7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The ADP2126ACDZ-1.20R7 belongs to Analog Devices' ultralow-profile DC-DC converter family, designed specifically for battery-powered portable electronics where board area, height, EMI, and battery life are primary constraints.
FAQ
What is the maximum continuous output current of the ADP2126ACDZ-1.20R7?
The ADP2126ACDZ-1.20R7 delivers up to 500 mA continuous output current across its full input voltage range (2.1 V to 5.5 V) and operating temperature range (−40°C to +85°C). This rating is guaranteed under thermal conditions meeting the specified θJA of 105°C/W on a 4-layer PCB. Exceeding this current may trigger current-limit protection or thermal shutdown.
Does the ADP2126ACDZ-1.20R7 require external feedback resistors?
No, the ADP2126ACDZ-1.20R7 does not require external feedback resistors. It features a factory-trimmed 1.20 V output with internal feedback network connected to the FB pin. The FB pin is used solely for loop stability and must be connected directly to the output capacitor's positive terminal-no resistor divider is needed or supported.
How does the MODE pin affect operation of the ADP2126ACDZ-1.20R7?
The MODE pin on the ADP2126ACDZ-1.20R7 selects between two operating modes: pulling MODE low enables auto mode (PFM at light loads, PWM at medium/heavy loads), while pulling MODE high forces continuous PWM mode regardless of load. Leaving MODE floating is prohibited-it must be actively pulled to VIN or GND via a resistor.
Can the ADP2126ACDZ-1.20R7 be enabled using a logic-level signal instead of an external clock?
Logic-level enable is available only on certain ADP2126/ADP2127 variants-not universally guaranteed for ADP2126ACDZ-1.20R7. Per the datasheet, this feature depends on specific ordering options. For ADP2126ACDZ-1.20R7, external clock (6–27 MHz) is the primary enable method; verify variant-specific enable capability in the official Analog Devices ordering guide before design-in.
What protection features are integrated into the ADP2126ACDZ-1.20R7?
The ADP2126ACDZ-1.20R7 integrates output-to-ground short-circuit protection (SCP), cycle-by-cycle overcurrent limiting, undervoltage lockout (UVLO), thermal shutdown (active in PWM mode only), and internal soft start. SCP triggers automatic retry shutdown below 0.52 V output; UVLO activates at 2.1 V rising threshold with 100 mV hysteresis to prevent erratic startup.
ADP2126ACDZ-1.20R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.1V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
ADP2126ACDZ-1.20R7 FAQ
1.How can I place an order for ADP2126ACDZ-1.20R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2126ACDZ-1.20R7 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 ADP2126ACDZ-1.20R7 reliable?
The price and inventory of ADP2126ACDZ-1.20R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2126ACDZ-1.20R7 is usually 5 days.
3.What payment methods are accepted for ADP2126ACDZ-1.20R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2126ACDZ-1.20R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2126ACDZ-1.20R7?
ADP2126ACDZ-1.20R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2126ACDZ-1.20R7 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 ADP2126ACDZ-1.20R7?
For technical support, including ADP2126ACDZ-1.20R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2126ACDZ-1.20R7 requirements.
6.How does Aetrix verify that ADP2126ACDZ-1.20R7 is sourced from the original manufacturer or authorized distributors?
All ADP2126ACDZ-1.20R7 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 ADP2126ACDZ-1.20R7 meets industry standards.
7.What is the process for return or replacement of ADP2126ACDZ-1.20R7?
All ADP2126ACDZ-1.20R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2126ACDZ-1.20R7, 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 ADP2126ACDZ-1.20R7 part is unused and in its original packaging.
Return procedure for ADP2126ACDZ-1.20R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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