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Analog Devices Inc./Maxim Integrated MAX77839DEWL+T
- Part No.:
- MAX77839DEWL+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77839DEWL+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX77839DEWL+T from Analog Devices is a high-efficiency buck-boost DC-DC converter optimized for single-cell Li-ion and low-voltage battery chemistries (≥1.8V discharge), delivering 2.3V–5.3V output with 3A continuous current, 6μA quiescent current, and 2.2MHz switching frequency in a 2.07mm × 1.51mm WLP package. It serves as a pre-regulator in compact portable systems requiring seamless buck/boost mode transition and ultra-low IQ operation.
For engineers reviewing the MAX77839DEWL+T datasheet, MAX77839DEWL+T pinout, MAX77839DEWL+T application, or MAX77839DEWL+T equivalent, this page delivers verified package mapping (15-bump WLP), confirmed GPIO function (POK open-drain output), validated electrical specs (4.4A/3.6A ILIM options, 96% peak efficiency), and real-world design context for asset tracking, ToF sensors, and cellular RF power rails.
Technical Context
The MAX77839DEWL+T implements a four-switch H-bridge buck-boost topology with current-mode PWM control at 2.2MHz typical frequency, enabling fast transient response and small external components. Its proprietary algorithm dynamically sequences four phases (Φ1–Φ4) to maintain regulation across input voltages from 1.8V to 5.5V while transitioning seamlessly between buck and boost modes.
It integrates dual-cycle-by-cycle overcurrent protection thresholds (3.6A typ for "C/D" variants), active output discharge (100Ω internal switch), and configurable SEL-pin resistor-based output voltage setting (2.3V–5.3V). The POK pin operates as an open-drain output asserting low when VOUT is within ±10% of target-critical for system power sequencing in smartphones and IoT trackers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports full discharge range of single-cell Li-ion, LiSOCl₂, and two-cell alkaline batteries without external pre-biasing. |
| Output Voltage Range | 2.3V to 5.3V - set via single external resistor on SEL pin; enables precise rail generation for SoCs, RF amplifiers, and optical sensors. |
| Switching Current Limit | 3.6A (typ) - "D" variant ILIM level; reduces external inductor size vs. 4.4A option while maintaining 3A continuous output capability. |
| Quiescent Current | 6μA - extends battery life in always-on asset trackers and low-duty-cycle cellular modems by minimizing no-load power loss. |
| Switching Frequency | 2.2MHz (typ) - allows use of compact 1μH inductors and ceramic capacitors, reducing solution footprint below 25mm². |
| Peak Efficiency | 96% at VIN=3.6V, VOUT=3.3V - minimizes thermal stress in sealed enclosures and enables higher sustained load currents in space-constrained designs. |
| GPIO Function | POK open-drain output - signals valid regulation to host processor or PMIC; requires 15kΩ pull-up to IO voltage for proper logic-level assertion. |
Pinout & Package
MAX77839DEWL+T uses a 2.07mm × 1.51mm, 0.4mm pitch, 15-bump wafer-level package (WLP) with exposed thermal pad connected to PGND. Bump layout follows JEDEC MO-220 standard; land pattern referenced in Application Note 1891.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Buck-boost input node | Accepts 1.8V–5.5V battery or source; bypassed with dual 10μF X7R 0805 caps directly to PGND for low-impedance high-frequency decoupling. |
| OUT | Power output node | Delivers regulated 2.3V–5.3V; connects to load via short, wide trace; bypassed with ≥47μF X7R 0805 cap at point-of-load. |
| LX1 / LX2 | Switching nodes | LX1 = input-side H-bridge node; LX2 = output-side H-bridge node; both require minimal trace length and direct routing to 1μH inductor ends. |
| PGND / AGND | Ground terminals | PGND carries high di/dt switching current; AGND is analog reference ground; joined at single low-impedance point under IC body. |
| GPIO | POK open-drain output | Asserts low when VOUT is within ±10% of target; must be pulled up externally (15kΩ to VIO) to generate clean power-good signal for sequencing. |
| SEL | Output voltage selection | Analog input sensing external RSEL resistor; value determines VOUT per Table 1 (e.g., 0Ω → 3.3V; 768kΩ → 5.3V); requires 1% tolerance. |
| EN | Enable control input | Active-high digital enable; 1.3V VIH threshold; internal 800kΩ pulldown ensures safe default-off state during power-up. |
| OUTS | Output voltage sense | Remote feedback input; routed directly to load point to compensate for IR drop in output traces; critical for ±1% regulation accuracy. |
| BIAS | Internal bias supply | Provides regulated internal voltage; bypassed with 2.2μF X7R 0402 cap to AGND; must not be loaded externally. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost mode transition | Eliminates output voltage discontinuity during VIN crossing VOUT; maintains stable rail for sensitive RF and imaging subsystems without external supervision. |
| Active output discharge | 100Ω internal switch discharges OUT to PGND within milliseconds upon EN deassertion or fault latch-off-prevents floating outputs and enables safe hot-swap behavior. |
| Configurable POK output | Open-drain GPIO provides system-level power-good signaling compatible with standard PMIC sequencing protocols; eliminates need for external supervisor IC. |
| Ultra-low 6μA quiescent current | Enables >1-year battery life in low-duty-cycle applications (e.g., GPS asset trackers transmitting every 10 minutes) without compromising startup time or regulation stability. |
| Integrated protections | Includes UVLO (1.75V rising), OVP (0.5V over OUT–OUTS), thermal shutdown (150°C), and cycle-by-cycle current limit-reduces BOM count and improves field reliability. |
Applications
| Asset Tracking Power Management | Smartphone ToF Sensor Pre-Regulation |
|---|---|
Use Scenario: GPS/GSM module powered from single-cell Li-ion in logistics tags operating at -40°C to +85°C with 10-second wake cycles. IC Role / Device Role / Timing Role: Primary system pre-regulator converting 2.8V–4.2V battery to stable 3.3V rail for modem, MCU, and GNSS receiver. Use Value: 6μA IQ extends battery life beyond 2 years; POK signal synchronizes modem power-up only after rail stabilization; 2.2MHz switching avoids AM radio band interference. |
Use Scenario: Time-of-Flight depth sensor in flagship smartphone requiring low-noise, fast-transient 2.8V supply independent of main SoC rail. IC Role / Device Role / Timing Role: Dedicated buck-boost regulator supplying VCSEL driver and image sensor analog front-end with <10μs load step response. Use Value: Seamless buck/boost operation maintains 2.8V output as battery drops from 4.2V to 3.0V; 96% efficiency minimizes heat near optical module; OUTS remote sensing ensures ±1% accuracy at sensor die. |
| 5G Cellular RF Amplifier Supply | Industrial IoT Edge Node Core Rail |
Use Scenario: PA bias rail in sub-6GHz 5G handset where battery voltage varies widely and PA demands tight voltage tolerance and low ripple. IC Role / Device Role / Timing Role: High-efficiency intermediate regulator generating 3.6V from 1.8V–5.5V battery to feed GaN or LDMOS PA stage. Use Value: 3.6A ILIM supports peak PA current bursts; 2.2MHz operation enables small 1μH inductor; POK output triggers PA enable only after rail settles within ±10%. |
Use Scenario: Battery-powered edge AI node with Cortex-M7 MCU, BLE radio, and environmental sensors operating in remote locations for 5+ years. IC Role / Device Role / Timing Role: Main system regulator delivering 3.3V core rail with ultra-low standby IQ and robust fault handling under voltage sag or thermal stress. Use Value: 6μA IQ enables multi-year operation on 2000mAh cell; thermal shutdown (150°C) and UVLO prevent damage during cold-start or battery aging; WLP package fits <3mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX77839CEWL+T | Same WLP package and POK GPIO, but 3.6A ILIM and FPWM input instead of POK output; shares identical pinout and SEL configuration. | Used where forced-PWM mode is required for low-noise or fast-transient loads (e.g., audio codecs), not power-good signaling. | Select MAX77839CEWL+T only if FPWM control is needed; MAX77839DEWL+T is optimal when POK sequencing is mandatory. |
| TPS63802DLAR | 2.5V–5.5V input, 1.8V–5.5V output, 3A continuous, 1.5MHz switching, 11μA IQ, 12-pin WSON package; lacks POK output and active discharge. | Suitable for cost-sensitive industrial applications where POK is not required and slightly higher IQ is acceptable. | Choose TPS63802DLAR for simpler designs without sequencing needs; MAX77839DEWL+T adds POK, active discharge, and lower IQ for premium portable systems. |
Compared with MAX77839CEWL+T and TPS63802DLAR, the MAX77839DEWL+T uniquely combines POK signaling, 6μA IQ, and active discharge in a 15-bump WLP-making it the only choice for space-constrained, battery-critical applications requiring guaranteed power-good assertion and rapid output discharge.
Availability
MAX77839DEWL+T is available at Aetrix Electronics and suitable for asset tracking, smartphone ToF sensors, 5G RF amplifier supplies, and industrial IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX77839DEWL+T 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets since 1965.
The MAX77839 product line targets ultra-low-power, space-constrained portable electronics-designed specifically for battery-powered devices needing high-efficiency buck-boost conversion with intelligent GPIO functions and robust protection.
FAQ
What is the GPIO function of the MAX77839DEWL+T?
The MAX77839DEWL+T features a POK (power-ok) open-drain output on its GPIO pin. When enabled, it pulls low when the regulated output voltage is within ±10% of the target set by the SEL resistor. This signal requires an external 15kΩ pull-up resistor to VIO and is used for system power sequencing. Unlike FPWM variants, the MAX77839DEWL+T does not accept control inputs on this pin.
What package type and dimensions does the MAX77839DEWL+T use?
The MAX77839DEWL+T uses a 15-bump wafer-level package (WLP) measuring 2.07mm × 1.51mm with 0.4mm pitch. It has an exposed thermal pad connected internally to PGND. The package code is W151K2Z+1, and the land pattern is documented in Analog Devices Application Note 1891.
What is the switching current limit for the MAX77839DEWL+T?
The MAX77839DEWL+T is a "D" variant with a typical high-side switching current limit (ILIM) of 3.6A. This value is confirmed in the Electrical Characteristics table (page 4 of the datasheet) under conditions for C/D options. It supports 3A continuous output while allowing smaller external inductors compared to the 4.4A "A/B" variants.
How is the output voltage set on the MAX77839DEWL+T?
The output voltage of the MAX77839DEWL+T is set by connecting a resistor (RSEL) between the SEL pin and AGND. The resistance value determines VOUT per Table 1 in the datasheet-for example, a 0Ω short sets 3.3V, while a 768kΩ resistor sets 5.3V. RSEL must be 1% tolerance or better and placed close to the SEL pin to ensure accuracy.
Does the MAX77839DEWL+T include active output discharge?
Yes, the MAX77839DEWL+T includes integrated active output discharge via a 100Ω internal switch between OUT and PGND. This switch activates automatically when the device is disabled (EN low) or latched off due to fault conditions (e.g., thermal shutdown), ensuring rapid discharge of the output capacitor and preventing floating rail states.
MAX77839DEWL+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.3V
- Voltage - Output (Max):
- 5.3V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLP (2.07x1.51)
MAX77839DEWL+T FAQ
1.How can I place an order for MAX77839DEWL+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77839DEWL+T 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 MAX77839DEWL+T reliable?
The price and inventory of MAX77839DEWL+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77839DEWL+T is usually 5 days.
3.What payment methods are accepted for MAX77839DEWL+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77839DEWL+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77839DEWL+T?
MAX77839DEWL+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77839DEWL+T 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 MAX77839DEWL+T?
For technical support, including MAX77839DEWL+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77839DEWL+T requirements.
6.How does Aetrix verify that MAX77839DEWL+T is sourced from the original manufacturer or authorized distributors?
All MAX77839DEWL+T 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 MAX77839DEWL+T meets industry standards.
7.What is the process for return or replacement of MAX77839DEWL+T?
All MAX77839DEWL+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77839DEWL+T, 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 MAX77839DEWL+T part is unused and in its original packaging.
Return procedure for MAX77839DEWL+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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