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Analog Devices Inc. ADP2102YCPZ-1.25R7
- Part No.:
- ADP2102YCPZ-1.25R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2102YCPZ-1.25R7.pdf
- Description:
- IC REG BUCK SYNC 1.25V 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:14,131
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Product details
Overview
ADP2102YCPZ-1.25R7 from Analog Devices is a synchronous step-down DC-to-DC converter optimized for low-duty-cycle, high-efficiency point-of-load regulation in USB-powered and submicron processor core applications. It delivers up to 600 mA at a fixed 1.25 V output from a 2.7 V–5.5 V input, operates at 3 MHz typical switching frequency, achieves 95% peak efficiency, and consumes only 0.01 µA in shutdown mode.
For engineers reviewing the ADP2102YCPZ-1.25R7 datasheet, ADP2102YCPZ-1.25R7 pinout, ADP2102YCPZ-1.25R7 application, or ADP2102YCPZ-1.25R7 equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters, and real-world design implications for portable power management systems requiring stable 1.25 V core supply with minimal external components.
Technical Context
The ADP2102YCPZ-1.25R7 employs constant on-time, valley current-mode control with voltage feed-forward to maintain pseudofixed 3 MHz operation across input and load variations-enabling fast transient response and compatibility with 1 µH inductors and 2.2 µF ceramic capacitors. Its internal synchronous rectifier eliminates external diode losses, while integrated soft start (250–800 µs), undervoltage lockout (2.2–2.5 V), and thermal shutdown (150°C) ensure robust startup and fault protection.
It supports dual operating modes via the MODE pin: forced continuous conduction mode (CCM) for low-noise, fixed-frequency operation, and power save mode (PSM) for ultra-low quiescent current (<100 µA) under light loads. The FB/OUT pin is internally configured for fixed 1.25 V output-no external feedback divider required-and the exposed-pad 8-lead LFCSP package provides low thermal resistance (θJA = 54°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25 V ±2% over −40°C to +85°C - ensures stable core rail for subvolt processors without external resistor network. |
| Max Output Current | 600 mA - sufficient for single-core ARM Cortex-M or DSP applications powered from 3.3 V or 5 V rails. |
| Switching Frequency | 3 MHz typical - enables use of compact 1 µH inductors and reduces output ripple without increasing EMI filtering complexity. |
| Efficiency | Up to 95% at medium load - minimizes thermal rise in space-constrained portable devices such as digital cameras and GPS units. |
| Shutdown Current | 0.01 µA - extends battery life during system sleep states in always-on USB peripherals. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), USB 2.0 (4.75–5.25 V), and regulated 3.3 V supplies. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and consumer portable equipment environments. |
Pinout & Package
ADP2102YCPZ-1.25R7 is housed in an 8-lead, 3 mm × 3 mm LFCSP package with exposed thermal pad soldered to PCB ground plane for optimal thermal performance (θJA = 54°C/W). Pin functions are electrically validated per Analog Devices Rev. C datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE | Mode selection input | Drives high for forced CCM (low noise); low for PSM (high light-load efficiency); must not float. |
| 2 - EN | Enable logic input | Active-high enable with 1.3 V threshold; pulls device into 0.01 µA shutdown when low. |
| 3 - FB/OUT | Fixed-output voltage sense node | Internally tied to top of 1.25 V divider; connect directly to output capacitor for regulation-no external resistors needed. |
| 4 - AGND | Analog ground reference | Must tie to PGND at single point near IC; exposed pad is electrically common with AGND. |
| 5 - PGND | Power ground return | Low-impedance return path for LX switch current; separate from AGND except at single-point connection. |
| 6 - LX | Switch node | Drain of internal P-MOSFET and source of N-MOSFET; connects to inductor; requires low-inductance layout. |
| 7 - PVIN | Main power input | Supplies high-current path to switches; requires ≥2.2 µF ceramic bypass to PGND. |
| 8 - AVIN | Analog supply input | Provides bias for control circuitry; may be RC-filtered (10 Ω + 0.1 µF) from PVIN for noise-sensitive designs. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and board area-critical for >90% efficiency at 600 mA. |
| Automatic power save mode (PSM) | Reduces switching frequency under light load to cut quiescent current below 100 µA-extending runtime in standby. |
| 3 MHz constant on-time control | Delivers <10 µs load transient recovery with 1 µH inductor-ideal for dynamic processor core loads. |
| Integrated soft start | 250–800 µs controlled ramp prevents inrush current and output overshoot during power-up. |
| Thermal and current protection | Valley current limit (~1 A) and thermal shutdown (150°C) prevent damage during overload or poor heatsinking. |
Applications
| USB-Powered Portable Devices | Submicron Processor Core Supply |
|---|---|
|
Use Scenario: Powering Wi-Fi modules, Bluetooth SoCs, or USB audio interfaces from 5 V bus with tight space constraints. IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, low-noise 1.25 V core voltage with fast transient response to burst data traffic. Use Value: Enables direct USB bus powering without intermediate LDOs-reducing BOM count and improving overall system efficiency by 15–20% vs. linear regulation. |
Use Scenario: Supplying ARM Cortex-M0/M3 cores or FPGA configuration logic where 1.25 V tolerance and low dropout are critical. IC Role / Device Role / Timing Role: Point-of-load converter maintaining regulation during rapid CPU clock scaling and sleep/wake transitions. Use Value: Achieves <1% output voltage deviation across 0–600 mA load steps-ensuring reliable core operation without brownout resets. |
| Digital Imaging Sensors | Industrial Handheld Terminals |
|
Use Scenario: Providing stable 1.25 V bias to CMOS image sensor analog front-end (AFE) in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise, high-PSRR DC-DC stage isolating sensitive analog circuitry from noisy digital domains. Use Value: 3 MHz switching frequency places fundamental ripple beyond sensor sampling bandwidth-eliminating visible banding artifacts. |
Use Scenario: Powering barcode scanners, RFID readers, or ruggedized PDAs operating from 3.7 V Li-ion batteries across wide temperature ranges. IC Role / Device Role / Timing Role: Main system regulator supporting cold-start capability down to 2.7 V input and surviving −40°C ambient. Use Value: Guaranteed operation from −40°C to +85°C with <2% output drift-ensuring consistent scan engine timing and decode reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.2 V output, 3 MHz, 600 mA; requires external soft-start capacitor; no MODE pin for CCM/PSM selection. | Lacks programmable mode control-operates exclusively in PSM-making it less suitable for noise-sensitive imaging or RF applications. | Select when strict 1.2 V output and simplified layout (no MODE routing) outweigh need for CCM operation. |
| RT8059GJ6 | Adjustable 0.6–3.3 V output, 3 MHz, 600 mA; includes built-in MOSFET drivers but no integrated synchronous rectifier. | Requires external high-side and low-side MOSFETs-increasing component count, footprint, and layout sensitivity versus ADP2102YCPZ-1.25R7's monolithic design. | Choose only if adjustable output or higher voltage flexibility (e.g., 1.8 V I/O rail) is required alongside same switching frequency and current capability. |
Compared with TPS62231DRYR and RT8059GJ6, ADP2102YCPZ-1.25R7 uniquely combines fixed 1.25 V output, MODE-selectable CCM/PSM operation, fully integrated synchronous switches, and LFCSP thermal performance-making it optimal for compact, battery-sensitive designs demanding both efficiency and low-noise regulation.
Availability
ADP2102YCPZ-1.25R7 is available at Aetrix Electronics and suitable for USB-powered portable devices, submicron processor core supplies, and industrial handheld terminals requiring stable component supply with full traceability and lifecycle support.
Supply support for ADP2102YCPZ-1.25R7 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, industrial automation, communications, and automotive markets.
The ADP2102 product line delivers highly integrated, high-frequency synchronous buck converters targeting space- and efficiency-critical portable and battery-operated applications-designed specifically for sub-2 V core rails in modern microcontrollers and SoCs.
FAQ
What is the exact output voltage tolerance of the ADP2102YCPZ-1.25R7 over temperature?
The ADP2102YCPZ-1.25R7 delivers a fixed 1.25 V output with ±2% initial accuracy over the full −40°C to +85°C operating range, as specified in Table 1 of the Rev. C datasheet. This includes combined effects of line, load, and temperature variation-verified across production lots and guaranteed by Analog Devices' correlation testing.
Does the ADP2102YCPZ-1.25R7 require external feedback resistors to set its output voltage?
No. The ADP2102YCPZ-1.25R7 is a factory-configured fixed-output variant: the FB/OUT pin is internally connected to a precision 1.25 V voltage divider, eliminating the need for external resistors. This simplifies layout, improves long-term stability, and reduces component count compared to adjustable versions like ADP2102-ADJ.
Can the ADP2102YCPZ-1.25R7 operate from a 2.5 V input supply?
No. The ADP2102YCPZ-1.25R7 has a minimum input voltage of 2.7 V due to its undervoltage lockout threshold (2.2–2.5 V rising), and operation below 2.7 V is not characterized or guaranteed. At 2.5 V input, the device remains in UVLO and will not regulate-designs must ensure VIN stays ≥2.7 V across all conditions.
How does the MODE pin affect efficiency and noise performance in the ADP2102YCPZ-1.25R7?
When MODE is high, ADP2102YCPZ-1.25R7 forces continuous conduction mode (CCM), maintaining ~3 MHz switching and minimizing output voltage ripple-ideal for noise-sensitive analog circuits. When MODE is low, it enters power save mode (PSM), reducing switching frequency under light loads to cut quiescent current to <100 µA-maximizing battery runtime at the cost of slightly higher ripple.
What thermal derating applies to the ADP2102YCPZ-1.25R7 at 600 mA continuous load?
At 600 mA and 3.6 V input, ADP2102YCPZ-1.25R7 dissipates ~0.3 W. With θJA = 54°C/W on a 4-layer JEDEC board, junction temperature rise is ~16°C above ambient. Derating is not required up to +85°C ambient-full 600 mA output is supported across the entire specified temperature range when PCB thermal design follows AN-772 guidelines.
ADP2102YCPZ-1.25R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-WFDFN Exposed Pad, CSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LFCSP (3x3)
ADP2102YCPZ-1.25R7 FAQ
1.How can I place an order for ADP2102YCPZ-1.25R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2102YCPZ-1.25R7 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 ADP2102YCPZ-1.25R7 reliable?
The price and inventory of ADP2102YCPZ-1.25R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2102YCPZ-1.25R7 is usually 5 days.
3.What payment methods are accepted for ADP2102YCPZ-1.25R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2102YCPZ-1.25R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2102YCPZ-1.25R7?
ADP2102YCPZ-1.25R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2102YCPZ-1.25R7 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 ADP2102YCPZ-1.25R7?
For technical support, including ADP2102YCPZ-1.25R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2102YCPZ-1.25R7 requirements.
6.How does Aetrix verify that ADP2102YCPZ-1.25R7 is sourced from the original manufacturer or authorized distributors?
All ADP2102YCPZ-1.25R7 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 ADP2102YCPZ-1.25R7 meets industry standards.
7.What is the process for return or replacement of ADP2102YCPZ-1.25R7?
All ADP2102YCPZ-1.25R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2102YCPZ-1.25R7, 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 ADP2102YCPZ-1.25R7 part is unused and in its original packaging.
Return procedure for ADP2102YCPZ-1.25R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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