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Analog Devices Inc. ADP2109ACBZ-1.5-R7
- Part No.:
- ADP2109ACBZ-1.5-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 5-WFBGA, WLCSP
- Datasheet:
-
ADP2109ACBZ-1.5-R7.pdf
- Description:
- IC REG BUCK 1.5V 600MA 5WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
ADP2109ACBZ-1.5-R7 from Analog Devices is a fixed-output 1.5 V, 600 mA synchronous step-down DC/DC converter in a 5-ball WLCSP package, featuring 3 MHz fixed-frequency PWM operation, internal discharge switch (150 Ω), 95% peak efficiency, and 18 μA quiescent current - designed for powering core logic and I/O rails in battery-powered portable electronics.
For engineers reviewing the ADP2109ACBZ-1.5-R7 datasheet, ADP2109ACBZ-1.5-R7 pinout, ADP2109ACBZ-1.5-R7 application, or ADP2109ACBZ-1.5-R7 equivalent, key selection considerations include its 2.3–5.5 V input range, power-save mode transition at 80 mA, 100% duty-cycle low-dropout capability, and integrated soft start and thermal shutdown - all critical for compact, high-efficiency power management in space-constrained designs.
Technical Context
The ADP2109ACBZ-1.5-R7 employs a proprietary high-speed current-mode PWM control architecture with fixed 3 MHz switching frequency for fast line/load transient response and excellent stability. It integrates both PFET high-side and NFET synchronous rectifier switches with on-resistances of 320 mΩ and 300 mΩ respectively.
It operates across two distinct regulation modes: fixed-frequency PWM (≥80 mA load) and hysteretic power-save mode (<80 mA), enabling >90% efficiency down to 1 mA. The device includes undervoltage lockout (2.15 V falling threshold), thermal shutdown (150°C with 20°C hysteresis), and automatic output capacitor discharge via internal 150 Ω switch upon shutdown or fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% accuracy in PWM mode - ensures stable core voltage for low-power microcontrollers and ASICs without external feedback resistors. |
| Max Output Current | 600 mA across full 2.3–5.5 V input range - supports single-cell Li+/LiPo or multi-cell alkaline/NiMH powered systems. |
| Switching Frequency | 3.0 MHz ±0.5 MHz - enables use of sub-1 µH inductors and <10 µF ceramic capacitors for ultra-compact PCB layouts. |
| Quiescent Current | 18 µA typical - extends battery life in always-on or low-duty-cycle portable devices such as GPS units and media players. |
| Shutdown Current | 0.2 µA max - minimizes leakage during system sleep states, critical for long-term standby operation. |
| Discharge Switch RDS(ON) | 150 Ω typical - discharges output capacitor in ~200 µs upon EN deactivation, preventing residual voltage hazards in hot-swap or sequencing-sensitive systems. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li+/LiPo cells (nominal 3.6 V), USB 5 V, PCMCIA, and stacked primary cells. |
Pinout & Package
ADP2109ACBZ-1.5-R7 uses a 5-ball Wafer-Level Chip Scale Package (WLCSP) with 0.4 mm pitch and 1.0 mm × 1.0 mm footprint. The package is optimized for minimal board area and thermal performance (θJA = 105°C/W on JEDEC 2S2P PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A1) | Power input supply node | Connects to 2.3–5.5 V source; requires ≥2.2 µF bypass capacitor placed adjacent to ball for EMI suppression and transient current delivery. |
| GND (A2) | Power and signal reference ground | Common return path for input/output capacitors and inductor; must be low-impedance plane connection to minimize noise coupling. |
| SW (B) | Switch node | Drain of internal PFET and source of NFET; connects directly to inductor and diode-free output path - routing must avoid sensitive analog traces. |
| EN (C1) | Logic-enable control input | Active-high TTL-compatible input (1.2 V threshold); pulling low disables regulator and activates discharge switch, drawing <1 µA total. |
| FB (C2) | Feedback reference point | Internally connected to 1.5 V reference; no external resistor divider required - simplifies layout and eliminates trimming errors. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode, reducing conduction losses and improving efficiency by up to 8% vs. asynchronous designs at 300 mA. |
| Integrated discharge switch | 150 Ω NMOS switch automatically discharges output capacitor when disabled - prevents latch-up or back-powering in multi-rail systems. |
| Current-mode PWM + PSM dual-mode control | Seamless transition between 3 MHz PWM (high efficiency >100 mA) and burst-mode PSM (efficiency >85% at 1 mA) - maintains regulation across full load range. |
| 100% duty-cycle low-dropout operation | PFET remains fully on when input drops near output voltage - sustains 1.5 V output down to VIN ≈ 1.6 V, extending usable battery life. |
| Internal soft start and compensation | Linear output ramp limits inrush current; eliminates need for external soft-start capacitor or loop compensation components - reduces BOM count by 2–3 parts. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor I/O banks and camera interface circuitry in slim-profile smartphones with single-cell Li+ battery. IC Role / Device Role / Timing Role: Primary 1.5 V point-of-load regulator delivering clean, sequenced power with fast transient response to handle burst-mode image capture and RF transmission. Use Value: 3 MHz switching enables <1 µH inductor and 4.7 µF input/10 µF output ceramic caps - saves >2.5 mm² PCB area versus 1 MHz alternatives. | Use Scenario: Supplying image sensor digital core and ISP logic in compact digital still/video cameras operating from dual AA or Li-ion packs. IC Role / Device Role / Timing Role: Fixed 1.5 V buck converter providing regulated rail with <2% output error over temperature and line variation - ensures consistent ADC reference and timing margin. Use Value: 18 µA quiescent current and 0.2 µA shutdown draw extend standby time to >30 days on 500 mAh battery. |
| GPS Navigation Units | Portable Media Players |
Use Scenario: Generating 1.5 V for GNSS baseband IC and flash memory interface in automotive-grade handheld navigation devices. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting cold-crank (2.3 V) and hot-idle (5.5 V) conditions while maintaining tight output regulation during satellite acquisition bursts. Use Value: Undervoltage lockout (2.15 V) prevents deep battery discharge; thermal shutdown (150°C) protects against enclosure overheating in sealed enclosures. | Use Scenario: Powering audio CODEC, NAND controller, and display driver in flash-based MP3/MP4 players with 3.7 V LiPo battery. IC Role / Device Role / Timing Role: Compact 1.5 V supply with integrated discharge switch - ensures safe power-down sequencing and eliminates residual voltage on shared data lines. Use Value: Internal 150 Ω discharge switch clears 10 µF output cap in <200 µs - meets USB On-The-Go (OTG) host reset timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP2108ACBZ-1.5-R7 | No integrated discharge switch; otherwise identical specs (1.5 V, 600 mA, 3 MHz, same WLCSP). | Not suitable where automatic output discharge is required (e.g., hot-swap, multi-rail sequencing, USB OTG). | Select ADP2109ACBZ-1.5-R7 when discharge functionality is mandatory; ADP2108ACBZ-1.5-R7 offers cost savings if discharge is handled externally. |
| TPS62231DRYR | 1.5 V fixed output, 600 mA, 3.6 MHz, 12 µA IQ, but uses 6-pin SOT-23 package (larger footprint, higher θJA). | Lacks integrated discharge switch and has lower max input voltage (5.5 V same, but UVLO threshold differs). | Choose TPS62231DRYR only if SOT-23 assembly is preferred and board area is not constrained; ADP2109ACBZ-1.5-R7 provides superior miniaturization and discharge capability. |
Compared with ADP2108ACBZ-1.5-R7, the ADP2109ACBZ-1.5-R7 adds essential discharge functionality without trade-offs in efficiency, size, or cost - making it the sole choice for systems requiring safe, autonomous output discharge. Versus TPS62231DRYR, it delivers identical electrical performance in half the footprint with integrated discharge, though with slightly higher quiescent current (18 µA vs. 12 µA).
Availability
ADP2109ACBZ-1.5-R7 is available at Aetrix Electronics and suitable for wireless handsets, portable media players, and GPS navigation units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP2109ACBZ-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 precision instrumentation, communications, industrial, and automotive markets.
The ADP2109 product line delivers ultra-compact, high-efficiency step-down converters for battery-powered portable electronics - engineered specifically to minimize solution size and maximize runtime in space- and power-constrained applications.
FAQ
What is the output voltage tolerance of the ADP2109ACBZ-1.5-R7 under full load and temperature range?
The ADP2109ACBZ-1.5-R7 guarantees ±2.5% output voltage accuracy over the full input range (2.3 V to 5.5 V) and junction temperature range (−40°C to +125°C) in PWM mode. At room temperature and nominal 3.6 V input, typical deviation is ±2%, ensuring reliable operation for 1.5 V I/O standards like low-voltage CMOS and mobile DDR interfaces.
Does the ADP2109ACBZ-1.5-R7 require external compensation components?
No, the ADP2109ACBZ-1.5-R7 features internal compensation optimized for standard 0.7–3.0 µH inductors and 4.7–10 µF ceramic output capacitors. This eliminates external compensation networks, reduces design risk, and ensures stable operation without loop tuning - verified across all recommended component combinations in the datasheet.
How does the power-save mode (PSM) transition work in the ADP2109ACBZ-1.5-R7?
The ADP2109ACBZ-1.5-R7 transitions into power-save mode when load current falls below 80 mA and exits when current rises above 85 mA. In PSM, it operates in burst mode with variable frequency and higher output ripple (±15 mV), achieving >85% efficiency at 1 mA - critical for extending battery life in standby or idle states without compromising regulation integrity.
Can the ADP2109ACBZ-1.5-R7 operate with input voltage below 2.3 V?
No - the ADP2109ACBZ-1.5-R7 incorporates undervoltage lockout (UVLO) that disables operation when VIN falls below 2.15 V (typical falling threshold). Below this level, both PFET and NFET switches turn off, and the device draws <1 µA. Operation below 2.3 V is not supported; attempting to force startup may cause unregulated output or instability.
What is the maximum allowable output capacitance for stable operation of the ADP2109ACBZ-1.5-R7?
The ADP2109ACBZ-1.5-R7 is stable with output capacitance from 4.7 µF to 47 µF using X5R/X7R ceramic capacitors. Larger values improve load transient response but increase soft-start time and discharge duration. The datasheet validates stability with 10 µF (Figure 1), and Figure 25 shows discharge behavior up to 50 µF - no upper limit is specified, but >47 µF may require verification of startup overshoot and loop phase margin.
ADP2109ACBZ-1.5-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-WLCSP (1.02x1.45)
ADP2109ACBZ-1.5-R7 FAQ
1.How can I place an order for ADP2109ACBZ-1.5-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2109ACBZ-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 ADP2109ACBZ-1.5-R7 reliable?
The price and inventory of ADP2109ACBZ-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 ADP2109ACBZ-1.5-R7 is usually 5 days.
3.What payment methods are accepted for ADP2109ACBZ-1.5-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2109ACBZ-1.5-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2109ACBZ-1.5-R7?
ADP2109ACBZ-1.5-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2109ACBZ-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 ADP2109ACBZ-1.5-R7?
For technical support, including ADP2109ACBZ-1.5-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2109ACBZ-1.5-R7 requirements.
6.How does Aetrix verify that ADP2109ACBZ-1.5-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2109ACBZ-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 ADP2109ACBZ-1.5-R7 meets industry standards.
7.What is the process for return or replacement of ADP2109ACBZ-1.5-R7?
All ADP2109ACBZ-1.5-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2109ACBZ-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 ADP2109ACBZ-1.5-R7 part is unused and in its original packaging.
Return procedure for ADP2109ACBZ-1.5-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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