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Analog Devices Inc. ADP2105ACPZ-R7
- Part No.:
- ADP2105ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
ADP2105ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 1A 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,835
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Product details
Overview
ADP2105ACPZ-R7 from Analog Devices is a 1 A synchronous step-down DC-to-DC converter in a 4 mm × 4 mm LFCSP package, operating from 2.7 V to 5.5 V input and delivering adjustable output from 0.8 V to VIN. It features 1.2 MHz fixed-frequency PWM control, ultralow 20 μA quiescent current, and seamless transition to PFM mode under light load for battery-powered applications such as mobile handsets and PDAs.
For engineers reviewing the ADP2105ACPZ-R7 datasheet, ADP2105ACPZ-R7 pinout, ADP2105ACPZ-R7 application, or ADP2105ACPZ-R7 equivalent, key selection criteria include its 1 A maximum load capability, 0.8 V feedback reference, integrated synchronous rectifier, and support for ceramic output capacitors without external compensation components.
Technical Context
The ADP2105ACPZ-R7 implements a peak-current-mode PWM architecture with slope compensation and programmable soft start (750–1200 µs with 1 nF capacitor). Its dual-switch topology integrates a P-channel high-side MOSFET (190 mΩ typical) and N-channel synchronous rectifier (160 mΩ typical), enabling 100% duty-cycle operation in dropout mode.
Control logic includes undervoltage lockout (2.4 V rising threshold), enable/shutdown with 0.1 µA shutdown current, and a transconductance error amplifier (50 µA/V) with COMP node for loop compensation. The device supports both adjustable (via FB divider) and preset-output variants - ADP2105ACPZ-R7 is the adjustable version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 1 A - defines maximum continuous load before current-limit foldback or thermal shutdown. |
| Input Voltage Range | 2.7 V to 5.5 V - supports single Li+/Li− polymer cell or multiple alkaline/NiMH cells without external regulators. |
| Feedback Reference | 0.8 V - sets output voltage via external resistor divider; enables precise low-voltage regulation down to 0.8 V. |
| Switching Frequency | 1.2 MHz (±0.2 MHz) - allows use of small inductors (e.g., 2.2 µH) and ceramic capacitors, minimizing solution footprint. |
| Quiescent Current | 20 µA - extends battery life in always-on or standby modes of portable electronics. |
| Shutdown Current | 0.1 µA - disconnects input from output during logic-controlled shutdown, preventing battery drain. |
| Efficiency Peak | 97% - achieved at medium load (e.g., 500 mA) with 3.6 V input and 1.2 V output, reducing thermal stress and power loss. |
Pinout & Package
ADP2105ACPZ-R7 uses a 16-lead 4 mm × 4 mm LFCSP package with exposed thermal pad soldered to PCB ground plane. Pin functions are validated per Analog Devices Rev. E datasheet Figure 4 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable logic input | High-active digital control: drives device ON/OFF; 2 V min high threshold ensures noise immunity in noisy environments. |
| FB (Pin 16) | Feedback sense input | Connects to resistor divider output; internal 0.8 V reference enables accurate output voltage setting across temperature (±0.016 V). |
| LX1/LX2 (Pins 10, 12) | Switch node outputs | Must be tied together; connects to inductor and output filter; high dv/dt requires tight layout to minimize EMI. |
| PGND (Pin 11) | Power ground return | Low-impedance path for input/output capacitor grounds; must connect directly to exposed pad for thermal and electrical performance. |
| AGND (Pin 7) | Analog ground reference | Reference for COMP, SS, and FB components; separate from PGND to avoid noise coupling into control loop. |
| COMP (Pin 5) | Error amplifier output | Loop compensation node; requires RC network to AGND to stabilize control loop across load/line variations. |
| SS (Pin 6) | Soft-start timing input | Capacitor to AGND sets startup ramp time (e.g., 1 nF → 1 ms); prevents inrush current and output overshoot. |
| PWIN1/PWIN2 (Pins 9, 13) | High-side switch source | Bypassed individually with ≥4.7 µF capacitors to PGND; reduces switching noise and improves PFET gate drive stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode, improving efficiency by ~5–10% at medium loads and reducing BOM count. |
| PFM/PWM hybrid control | Automatically switches between fixed-frequency PWM (for transient response) and variable-frequency PFM (for <100 µA IQ at light load). |
| 100% duty-cycle LDO mode | Maintains regulation when VIN ≈ VOUT, extending usable input range and avoiding dropout-induced system reset. |
| Ultralow shutdown current | 0.1 µA draw ensures negligible battery drain during system sleep - critical for multi-week standby in IoT sensors. |
| Thermal shutdown with hysteresis | 140°C trip with 40°C hysteresis prevents thermal cycling; exposed pad + 4-layer board achieves θJA = 40°C/W. |
Applications
| Mobile Handsets | PDAs and Palmtop Computers |
|---|---|
Use Scenario: Powering application processors and memory subsystems from single-cell Li+ battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 1.2 V or 1.8 V core voltage with fast load-transient response. Use Value: 97% peak efficiency and 20 µA quiescent current extend talk time and standby duration without compromising performance. | Use Scenario: Supplying display backlight drivers and touch controller ICs in compact handheld devices. IC Role / Device Role / Timing Role: Secondary adjustable buck converter generating 2.5 V or 3.3 V from main battery rail. Use Value: Adjustable output and small 4 mm × 4 mm footprint enable flexible power tree design in space-constrained PCB layouts. |
| Telecom Equipment | Audio/Video Consumer Electronics |
Use Scenario: Providing clean 3.3 V bias for Ethernet PHYs and USB transceivers in portable networking gear. IC Role / Device Role / Timing Role: Point-of-load regulator with low-noise PFM mode during idle link states. Use Value: 1.2 MHz switching avoids interference with sensitive analog receive paths while maintaining high light-load efficiency. | Use Scenario: Powering DSPs and audio codecs in Bluetooth speakers and portable media players. IC Role / Device Role / Timing Role: Low-ripple, low-noise supply generator supporting high-fidelity signal chain performance. Use Value: Integrated synchronous rectifier and optimized LC filter design reduce output ripple to <10 mVpp, preserving SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1 A, 2.05–6.0 V input, 0.6 V reference, 3.6 MHz switching frequency; smaller 2 mm × 2 mm WSON package. | Higher switching frequency enables smaller inductors but increases switching losses above 500 mA. | Prefer TPS62231DRVR for ultra-compact designs where board area is more critical than mid-load efficiency. |
| MP2105DQ-LF-Z | 1 A, 2.5–5.5 V input, 0.8 V reference, 1.5 MHz switching; no PFM mode - operates in forced PWM only. | Lacks light-load efficiency optimization; quiescent current ~50 µA vs. ADP2105ACPZ-R7's 20 µA. | Choose MP2105DQ-LF-Z where deterministic PWM timing is required over battery life extension. |
Compared with TPS62231DRVR and MP2105DQ-LF-Z, ADP2105ACPZ-R7 delivers superior light-load efficiency via PFM mode and maintains higher peak efficiency at 1 A due to lower RDS(on) switches, making it optimal for mixed-load portable systems.
Availability
ADP2105ACPZ-R7 is available at Aetrix Electronics and suitable for mobile handsets, PDAs, and telecom equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP2105ACPZ-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.
ADP2105ACPZ-R7 belongs to the ADP210x family of high-efficiency, low-quiescent-current buck converters designed specifically for battery-powered portable electronics with stringent size and power constraints.
FAQ
What is the maximum output current rating for ADP2105ACPZ-R7?
ADP2105ACPZ-R7 is rated for a maximum continuous output current of 1 A under typical thermal conditions (θJA = 40°C/W, 4-layer board). This limit is enforced by internal peak current limiting (1.5 A typical) and thermal shutdown (140°C). Derating is required above 85°C ambient or with reduced copper area.
Does ADP2105ACPZ-R7 support adjustable output voltage?
Yes, ADP2105ACPZ-R7 is the adjustable version of the ADP210x family. Its FB pin references an internal 0.8 V precision bandgap, allowing output voltage setting from 0.8 V to VIN using an external resistor divider. Fixed-output variants (e.g., ADP2105ACBZ-1.2-R7) are separate part numbers.
What package type and thermal characteristics does ADP2105ACPZ-R7 use?
ADP2105ACPZ-R7 uses a 16-lead 4 mm × 4 mm LFCSP package with exposed thermal pad. Its thermal resistance is θJA = 40°C/W under JEDEC-standard 4-layer board conditions with the exposed pad soldered to a solid ground plane, enabling 1 W maximum power dissipation.
How does ADP2105ACPZ-R7 manage efficiency across load conditions?
ADP2105ACPZ-R7 uses automatic mode switching: fixed-frequency PWM at medium/heavy loads for stability and transient response, and pulse-frequency modulation (PFM) at light loads (<10 mA) to reduce switching losses. This achieves 97% peak efficiency and 20 µA quiescent current simultaneously.
Can ADP2105ACPZ-R7 operate with input voltage equal to output voltage?
Yes, ADP2105ACPZ-R7 supports 100% duty-cycle operation, functioning as a low-dropout linear regulator (LDO) when VIN ≤ VOUT + (ILOAD × RDS(on)). This maintains regulation during brownout or battery discharge, preventing system reset without external circuitry.
ADP2105ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP (4x4)
ADP2105ACPZ-R7 FAQ
1.How can I place an order for ADP2105ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2105ACPZ-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 ADP2105ACPZ-R7 reliable?
The price and inventory of ADP2105ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2105ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2105ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2105ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2105ACPZ-R7?
ADP2105ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2105ACPZ-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 ADP2105ACPZ-R7?
For technical support, including ADP2105ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2105ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2105ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2105ACPZ-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 ADP2105ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2105ACPZ-R7?
All ADP2105ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2105ACPZ-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 ADP2105ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2105ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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