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Analog Devices Inc. ADP2138ACBZ-0.8-R7
- Part No.:
- ADP2138ACBZ-0.8-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
ADP2138ACBZ-0.8-R7.pdf
- Description:
- IC REG BUCK 0.8V 800MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ADP2138ACBZ-0.8-R7 from Analog Devices is a compact, synchronous step-down DC-to-DC converter delivering up to 800 mA output at fixed 0.8 V with 3 MHz switching frequency, 2.3 V–5.5 V input range, and 95% peak efficiency. It serves as the primary power rail for low-voltage digital cores in portable battery-powered systems such as GPS navigation units and digital cameras.
For engineers reviewing the ADP2138ACBZ-0.8-R7 datasheet, ADP2138ACBZ-0.8-R7 pinout, ADP2138ACBZ-0.8-R7 application, or ADP2138ACBZ-0.8-R7 equivalent, key selection criteria include its 6-ball WLCSP package size, 100 mA PSM transition threshold, 23 μA quiescent current, and forced PWM/automatic PWM-PSM mode control via MODE pin.
Technical Context
The ADP2138ACBZ-0.8-R7 employs a fixed-frequency, current-mode PWM architecture optimized for fast transient response and stable regulation across 2.3 V–5.5 V input. Its internal synchronous rectifier eliminates external diode losses, while integrated soft start and compensation reduce external component count to just three passive parts.
It supports dual operating modes: forced PWM (low ripple, noise-sensitive loads) and automatic PWM/PSM (high light-load efficiency), with seamless 100% duty-cycle dropout operation when VIN approaches VOUT. Protection includes undervoltage lockout (2.15 V threshold), thermal shutdown (150°C), and current limiting (1100–1650 mA PFET peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V - precisely regulated without external feedback resistors. |
| Max Output Current | 800 mA - sustained across full input range (2.3 V–5.5 V) and temperature (−40°C to +125°C junction). |
| Switching Frequency | 3.0 MHz (±0.4 MHz) - enables use of sub-1 μH inductors and ultra-compact PCB layout. |
| Quiescent Current | 23 μA (typical) - minimizes battery drain during standby in always-on portable devices. |
| Shutdown Current | 0.2 μA (typical) - ensures near-zero leakage during system sleep states. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single Li+/Li-Po cells, USB, PCMCIA, and multi-cell alkaline/NiMH sources. |
| Efficiency (Peak) | 95% - achieved at medium load under typical conditions (e.g., VIN = 3.6 V, VOUT = 0.8 V). |
Pinout & Package
ADP2138ACBZ-0.8-R7 uses a 6-ball, 1 mm × 1.5 mm wafer-level chip-scale package (WLCSP) with 0.5 mm ball pitch. The package is designed for high-density portable PCBs and requires standard reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input supply node | Connects directly to input source (2.3–5.5 V); must be bypassed with ≥4.7 µF ceramic capacitor placed adjacent to pin. |
| SW (Pin 2) | Switch node | Drain connection of internal PFET and NFET; interfaces with external inductor and output LC filter. |
| GND (Pin 3) | Power ground reference | Common return path for input/output capacitors and internal regulator circuitry; critical for noise control and thermal dissipation. |
| EN (Pin 4) | Enable control input | Logic-high (>1.2 V) activates regulation with soft-start; logic-low (<0.4 V) disables converter and reduces input current to 0.2 μA. |
| MODE (Pin 5) | Operating mode selector | High = forced continuous PWM (low ripple); low = automatic PWM/PSM (optimized light-load efficiency). |
| VOUT (Pin 6) | Feedback sensing input | Monitors regulated output voltage; internally connected to fixed 0.8 V reference - no external resistor divider required. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and board area while enabling >95% efficiency. |
| Integrated soft start | Ramps output voltage linearly at startup to limit inrush current and prevent input voltage sag on weak sources like batteries. |
| 100% duty-cycle operation | Maintains regulation even when VIN drops close to VOUT (e.g., 1.0 V input → 0.8 V output), avoiding dropout failure. |
| Fast transient response | Stabilizes within microseconds after 150 mA → 500 mA load steps (VOUT = 0.8 V), preserving core voltage integrity in burst-mode processors. |
| Thermal & current protection | Shuts down at 150°C junction temperature with 20°C hysteresis; limits PFET peak current to 1100–1650 mA to prevent damage during overload. |
Applications
| Mobile GPS Navigation Units | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor and GNSS RF front-end in handheld GPS receivers operating from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 0.8 V core supply for ARM-based SoC requiring tight voltage tolerance (±2%) and low noise under dynamic load. Use Value: 3 MHz switching avoids AM radio band interference; 23 μA quiescent current extends battery life during location tracking standby. | Use Scenario: Supplying image signal processor (ISP) and CMOS sensor interface in compact digital still/video cameras. IC Role / Device Role / Timing Role: Fixed 0.8 V rail for low-power ISP cores, synchronized with burst-mode capture sequences. Use Value: Fast load transient response prevents frame corruption during rapid sensor readout; 6-ball WLCSP fits tight camera module footprints. |
| Wireless Handsets | Portable Media Players |
Use Scenario: Delivering 0.8 V to application processor cores in 4G/LTE smartphones during active data transmission. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting dynamic voltage scaling (DVS) with MODE pin-controlled PSM/PWM transitions. Use Value: Automatic PWM/PSM mode improves average efficiency by >15% during idle and background sync tasks without firmware intervention. | Use Scenario: Powering audio codec and flash memory controller in flash-based MP3 players powered by coin-cell or Li-poly battery. IC Role / Device Role / Timing Role: Main system regulator enabling long playback time via ultralow 0.2 μA shutdown current and 95% peak efficiency. Use Value: 2.3 V minimum input allows operation down to nearly depleted battery (≈2.4 V), maximizing usable capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 0.8 V output, 3 MHz, 800 mA, but uses 1.2 mm × 1.2 mm DSBGA package and lacks 100% duty-cycle mode. | Lower thermal resistance (θJA = 140°C/W vs. 170°C/W), better suited for higher ambient temperature environments. | Select when board space permits slightly larger footprint and 100% dropout is not required. |
| RT8059NGQW | 0.8 V fixed, 3 MHz, 800 mA, but features 1.5 μA shutdown current and no MODE pin - only PSM mode available. | Superior shutdown current benefits ultra-low-power wake-on-event designs; no PWM forcing capability limits noise-sensitive use cases. | Select when lowest possible off-state leakage is critical and ripple sensitivity is secondary. |
Compared with TPS62231DRYR and RT8059NGQW, the ADP2138ACBZ-0.8-R7 uniquely combines 100% duty-cycle operation, MODE-selectable PWM/PSM, and the smallest WLCSP footprint-making it optimal for space-constrained, battery-critical portable systems requiring both efficiency and regulation robustness.
Availability
ADP2138ACBZ-0.8-R7 is available at Aetrix Electronics and suitable for mobile GPS navigation units, digital cameras, and wireless handsets requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP2138ACBZ-0.8-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, and power management markets.
The ADP2138 series belongs to Analog Devices' high-frequency, ultra-compact DC/DC converter product line, engineered specifically for battery-powered portable electronics demanding minimal solution size, high efficiency across load range, and robust protection.
FAQ
What is the output voltage tolerance of the ADP2138ACBZ-0.8-R7 under PWM mode?
The ADP2138ACBZ-0.8-R7 guarantees ±2% output voltage accuracy over temperature and line/load conditions when operating in PWM mode, as specified in Table 1 of the Rev. E datasheet. This tolerance applies across the full −40°C to +125°C junction temperature range and ensures reliable core voltage delivery for sensitive digital ICs.
Does the ADP2138ACBZ-0.8-R7 require external compensation components?
No, the ADP2138ACBZ-0.8-R7 features fully internal compensation, eliminating the need for external RC networks. This simplifies design, reduces bill-of-materials cost, and ensures stable operation with only three external components: input capacitor, output capacitor, and inductor - all specified in the Applications Information section.
Can the ADP2138ACBZ-0.8-R7 operate with an input voltage lower than 2.3 V?
No - the ADP2138ACBZ-0.8-R7 has a hard undervoltage lockout (UVLO) threshold of 2.15 V (falling) and will shut down if VIN drops below this level. Operation below 2.3 V is outside absolute maximum ratings and violates functional specification; sustained sub-2.3 V input risks non-regulation or uncontrolled behavior.
How does the MODE pin affect efficiency in light-load conditions for the ADP2138ACBZ-0.8-R7?
When the MODE pin is driven low, the ADP2138ACBZ-0.8-R7 automatically enters power save mode (PSM) below 100 mA load, reducing switching activity and achieving >85% efficiency at 1 mA. In contrast, forced PWM mode (MODE = high) maintains fixed 3 MHz operation but drops to ~45% efficiency at same light load - making MODE pin control essential for optimizing battery runtime.
Is the ADP2138ACBZ-0.8-R7 pin-compatible with other variants in the ADP2138 family?
Yes - all ADP2138 variants (e.g., ADP2138ACBZ-1.2-R7, ADP2138ACBZ-1.8-R7) share identical 6-ball WLCSP packaging, pinout, and electrical interface. Only the internal feedback reference differs; therefore, swapping fixed-output versions requires no PCB changes, provided input/output capacitor and inductor values remain appropriate for the new VOUT.
ADP2138ACBZ-0.8-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 0.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.03x1.50)
ADP2138ACBZ-0.8-R7 FAQ
1.How can I place an order for ADP2138ACBZ-0.8-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2138ACBZ-0.8-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 ADP2138ACBZ-0.8-R7 reliable?
The price and inventory of ADP2138ACBZ-0.8-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2138ACBZ-0.8-R7 is usually 5 days.
3.What payment methods are accepted for ADP2138ACBZ-0.8-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2138ACBZ-0.8-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2138ACBZ-0.8-R7?
ADP2138ACBZ-0.8-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2138ACBZ-0.8-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 ADP2138ACBZ-0.8-R7?
For technical support, including ADP2138ACBZ-0.8-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2138ACBZ-0.8-R7 requirements.
6.How does Aetrix verify that ADP2138ACBZ-0.8-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2138ACBZ-0.8-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 ADP2138ACBZ-0.8-R7 meets industry standards.
7.What is the process for return or replacement of ADP2138ACBZ-0.8-R7?
All ADP2138ACBZ-0.8-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2138ACBZ-0.8-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 ADP2138ACBZ-0.8-R7 part is unused and in its original packaging.
Return procedure for ADP2138ACBZ-0.8-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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