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Analog Devices Inc. ADP2105ACPZ-1.5-R7
- Part No.:
- ADP2105ACPZ-1.5-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
ADP2105ACPZ-1.5-R7.pdf
- Description:
- IC REG BUCK SYNC 1.5V 1A 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:13,467
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Product details
Overview
ADP2105ACPZ-1.5-R7 from Analog Devices is a 1.5 A synchronous step-down DC-DC converter in a 4 mm × 4 mm LFCSP package, operating from 2.7 V to 5.5 V input and delivering a fixed 1.5 V output with ±3% regulation over temperature and load. It features 1.2 MHz switching frequency, 20 µA quiescent current, and integrated P-channel high-side switch (190 mΩ typ) and N-channel synchronous rectifier (160 mΩ typ), optimized for battery-powered portable electronics.
For engineers reviewing the ADP2105ACPZ-1.5-R7 datasheet, ADP2105ACPZ-1.5-R7 pinout, ADP2105ACPZ-1.5-R7 application, or ADP2105ACPZ-1.5-R7 equivalent, key selection criteria include its 1.5 A continuous output capability, ultralow shutdown current (0.1 µA), seamless PWM-to-PFM mode transition, and compatibility with small ceramic output capacitors in space-constrained designs.
Technical Context
The ADP2105ACPZ-1.5-R7 implements a peak-current-mode PWM control architecture at medium-to-heavy loads, with automatic transition to pulse-frequency modulation (PFM) under light-load conditions to maintain high efficiency down to 10 mA. Its 1.2 MHz fixed switching frequency enables compact external LC filtering using sub-3 µH inductors and ≤10 µF ceramic output capacitors.
It integrates dual power switches - a P-channel MOSFET high-side switch and an N-channel MOSFET synchronous rectifier - with internal slope compensation and zero-crossing detection to ensure stable operation across input and load transients. The device supports 100% duty-cycle operation for low-dropout (LDO) mode during input voltage sag near the output level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5 A continuous - supports single-core microcontrollers and baseband processors in portable systems |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single Li+/Li− polymer cells and multi-cell alkaline/NiMH batteries |
| Fixed Output Voltage | 1.5 V ±3% (−40°C to +125°C) - eliminates external feedback resistors and simplifies layout |
| Quiescent Current | 20 µA typical - extends battery runtime in always-on or standby modes |
| Switching Frequency | 1.2 MHz ±16.7% - enables use of <3 µH inductors and avoids AM radio band interference |
| Shutdown Current | 0.1 µA max - ensures negligible battery drain during system sleep |
| Efficiency Peak | 97% at 3.6 VIN/1.5 VOUT/500 mA - reduces thermal load in sealed enclosures |
Pinout & Package
ADP2105ACPZ-1.5-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 | Active-high TTL/CMOS-compatible control; pulls input current to 0.1 µA in shutdown |
| IN (Pin 14) | Main power input | Supplies internal bias circuitry; requires 0.1 µF bypass to AGND close to pin |
| PWIN1/PWIN2 (Pins 9,13) | High-side switch source inputs | Each must be bypassed with ≥4.7 µF capacitor to PGND for low-impedance gate drive |
| LX1/LX2 (Pins 10,12) | Switch node outputs | Must be tied together and connected directly to inductor; carries high di/dt switching current |
| PGND (Pin 11) | Power ground return | Primary return path for input/output capacitors and LX current; connects to exposed pad |
| AGND (Pin 7) | Analog ground reference | Reference for FB, COMP, SS; must be star-connected to PGND via exposed pad only |
| FB (Pin 16) | Feedback input | Internally regulated to 0.8 V; shorted to output for fixed 1.5 V version (no external divider) |
| SS (Pin 6) | Soft-start timing node | 1 nF capacitor to AGND sets 1 ms soft-start period to limit inrush current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode, enabling >95% efficiency at 1 A without heatsinking |
| Automatic PWM/PFM mode transition | Maintains >80% efficiency down to 10 mA load without manual mode selection |
| 100% duty-cycle LDO mode | Regulates output when VIN drops within ~100 mV of VOUT, preventing brownout in battery discharge |
| Programmable soft start | 1 ms ramp time (with 1 nF) prevents output overshoot and limits input capacitor stress |
| Undervoltage lockout (UVLO) | 2.4 V turn-on threshold with 200 mV hysteresis prevents erratic startup from weak batteries |
Applications
| Mobile Handsets | PDAs and Palmtop Computers |
|---|---|
Use Scenario: Powering application processors and memory subsystems in slim-profile smartphones with single-cell Li+ battery. IC Role / Device Role / Timing Role: Primary 1.5 V core supply for ARM Cortex-A series SoCs requiring tight load transient response. Use Value: 97% peak efficiency and 20 µA quiescent current extend talk time by >12% versus legacy buck converters. |
Use Scenario: Generating stable 1.5 V rail for LCD controller and touch interface ICs in handheld PDAs. IC Role / Device Role / Timing Role: Compact, low-noise point-of-load regulator with minimal BOM count. Use Value: 4 mm × 4 mm LFCSP footprint saves >35% board area versus SOIC-8 alternatives. |
| Telecom Equipment | Audio/Video Consumer Electronics |
Use Scenario: Supplying FPGA I/O banks and PHY interfaces in compact VoIP phones and wireless access points. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator supporting dynamic voltage scaling. Use Value: 1.2 MHz switching frequency avoids audible noise and simplifies EMI filtering. |
Use Scenario: Powering digital audio processors and HDMI transmitter ICs in portable media players. IC Role / Device Role / Timing Role: Low-ripple, fast-transient 1.5 V supply enabling clean analog audio output. Use Value: Integrated soft start and UVLO prevent pop/click artifacts during power-up/down sequences. |
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 |
|---|---|---|---|
| TPS62231DRYR | 1.5 A, 1.2 MHz, 2.05–6.0 V input, fixed 1.5 V output; 19 µA IQ; 2.5 mm × 2.5 mm WSON | Smaller package but higher RDS(on) (220 mΩ HS) and lower thermal resistance margin | Preferred for ultra-compact layouts where board area is more critical than thermal headroom |
| RT8059GJ6 | 1.5 A, 1.5 MHz, 2.5–5.5 V input, fixed 1.5 V output; 25 µA IQ; 2 mm × 2 mm DFN | Higher switching frequency but no PFM mode - less efficient below 50 mA | Selected when strict EMI compliance requires deterministic 1.5 MHz clocking, not variable PFM |
Compared with TPS62231DRYR and RT8059GJ6, ADP2105ACPZ-1.5-R7 offers superior thermal performance (θJA = 40°C/W vs. ≥55°C/W) and smoother light-load efficiency due to its seamless PWM/PFM transition, making it optimal for thermally constrained battery-powered devices with variable load profiles.
Availability
ADP2105ACPZ-1.5-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 traceability for production programs.
Supply support for ADP2105ACPZ-1.5-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The ADP2105/ADP2106/ADP2107 family was designed specifically for space- and power-constrained portable electronics, emphasizing ultralow quiescent current, high efficiency across wide load ranges, and minimal external component count.
FAQ
What is the maximum continuous output current of the ADP2105ACPZ-1.5-R7?
The ADP2105ACPZ-1.5-R7 delivers up to 1.5 A continuous output current under typical thermal conditions (θJA = 40°C/W, 25°C ambient, full copper pour). Its peak current limit is 1.5 A (typical), with derating required above 85°C junction temperature per the datasheet's thermal characteristics table.
Does the ADP2105ACPZ-1.5-R7 require external feedback resistors?
No. The ADP2105ACPZ-1.5-R7 is the fixed 1.5 V output variant - its FB pin is internally connected to regulate precisely to 1.5 V. External resistors are unnecessary, reducing BOM count and layout complexity compared to adjustable versions like ADP2105ACPZ-ADJ.
How does the ADP2105ACPZ-1.5-R7 manage efficiency at light loads?
The ADP2105ACPZ-1.5-R7 automatically transitions from constant-frequency PWM mode to variable-frequency PFM mode below ~100 mA load. This reduces switching losses and maintains >85% efficiency at 10 mA, enabled by its 20 µA quiescent current and optimized gate drive architecture.
What is the recommended soft-start capacitor value for the ADP2105ACPZ-1.5-R7?
A 1 nF capacitor from SS (Pin 6) to AGND sets a nominal 1 ms soft-start period, limiting inrush current and preventing output overshoot. This value is validated in the datasheet's Typical Operating Circuit and Soft Start Period specification (750–1200 µs range).
Can the ADP2105ACPZ-1.5-R7 operate with a 2.5 V input voltage?
No. The ADP2105ACPZ-1.5-R7 has a minimum input voltage of 2.7 V per Absolute Maximum Ratings and Specifications tables. Operation below 2.7 V risks UVLO activation or unstable regulation; it is not rated for 2.5 V input even in dropout mode.
ADP2105ACPZ-1.5-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 16-WQFN 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:
- 16-LFCSP (4x4)
ADP2105ACPZ-1.5-R7 FAQ
1.How can I place an order for ADP2105ACPZ-1.5-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2105ACPZ-1.5-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-1.5-R7 reliable?
The price and inventory of ADP2105ACPZ-1.5-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-1.5-R7 is usually 5 days.
3.What payment methods are accepted for ADP2105ACPZ-1.5-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2105ACPZ-1.5-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2105ACPZ-1.5-R7?
ADP2105ACPZ-1.5-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2105ACPZ-1.5-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-1.5-R7?
For technical support, including ADP2105ACPZ-1.5-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2105ACPZ-1.5-R7 requirements.
6.How does Aetrix verify that ADP2105ACPZ-1.5-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2105ACPZ-1.5-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-1.5-R7 meets industry standards.
7.What is the process for return or replacement of ADP2105ACPZ-1.5-R7?
All ADP2105ACPZ-1.5-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2105ACPZ-1.5-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-1.5-R7 part is unused and in its original packaging.
Return procedure for ADP2105ACPZ-1.5-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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