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Analog Devices Inc./Maxim Integrated MAX77839DEWL+
- Part No.:
- MAX77839DEWL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77839DEWL+.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
The MAX77839DEWL+ from Analog Devices is a high-efficiency, 6μA quiescent current buck-boost regulator in a 15-bump WLP (2.07mm × 1.51mm), supporting 1.8V–5.5V input and 2.3V–5.3V single-resistor-adjustable output. It delivers up to 3A continuous output with 3.6A peak switching current limit (D-option), features POK open-drain GPIO, and enables seamless buck/boost mode transition for single-cell Li-ion and low-voltage battery systems in compact portable electronics.
For engineers reviewing the MAX77839DEWL+ datasheet, MAX77839DEWL+ pinout, MAX77839DEWL+ application, or MAX77839DEWL+ equivalent, this page provides verified package mapping (W151K2Z+1), confirmed POK-mode GPIO behavior, validated 3.6A ILIM specification, thermal shutdown at +150°C, and real-world design implications of active output discharge and 2.2MHz fixed-frequency PWM control.
Technical Context
The MAX77839DEWL+ implements a four-switch H-bridge buck-boost topology with current-mode PWM control at 2.2MHz typical switching frequency. Its proprietary algorithm dynamically sequences four phases (Φ1–Φ4) to maintain regulation across input voltages below or above the output setpoint, enabling smooth transitions without discontinuity or audible noise.
This variant (D-option) configures the GPIO pin as an open-drain POK output-asserted low when VOUT is within ±10% of target-and uses the 3.6A (typ) inductor peak current limit. It integrates cycle-by-cycle OCP, UVLO (1.75V rising), OVP (0.5V differential), and active discharge (100Ω internal switch), all operating over –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports full discharge of single-cell Li-ion (down to 1.8V), two-cell alkaline, or LiSOCl₂ batteries without external pre-regulation. |
| Output Voltage Range | 2.3V to 5.3V - set via single resistor (RSEL) on SEL pin; enables precise rail generation (e.g., 3.3V, 3.6V, 4.2V) without external feedback dividers. |
| Switching Current Limit | 3.6A (typ) - defines maximum inductor peak current for D-option; determines minimum inductor saturation rating and PCB trace sizing. |
| Quiescent Current | 6μA - enables >1-year battery shelf life in always-on asset trackers or IoT sensors with intermittent wake-up cycles. |
| Switching Frequency | 2.2MHz (typ) - allows use of compact 1μH inductors and small 0805/0603 ceramic capacitors, reducing solution footprint by >30% vs. 500kHz converters. |
| POK Output Accuracy | ±10% window around VOUT - provides reliable power-good signaling for sequenced SoC boot or peripheral enable without external comparators. |
| Active Discharge Resistance | 100Ω - discharges output capacitor to <10% VOUT within ~10ms after EN deassertion, meeting fast-power-down requirements in mobile devices. |
Pinout & Package
MAX77839DEWL+ uses the 15-bump wafer-level package (WLP), outline number 21-100441, package code W151K2Z+1, 0.4mm pitch, 2.07mm × 1.51mm footprint. Thermal resistance θJA = 61.65°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Buck-boost input supply | Accepts 1.8V–5.5V; requires dual 10μF X7R 16V ceramics placed adjacent to minimize high-di/dt loop inductance. |
| OUT | Regulated power output | Delivers up to 3A; bypassed with dual 47μF X7R 10V ceramics; connects to load via low-impedance path. |
| LX1 / LX2 | Switching nodes (input/output side) | High dv/dt nodes; must be routed short/wide with minimal copper area to reduce EMI and MOSFET stress. |
| PGND | Power ground return | Primary return for high-current switching paths; must connect directly to CIN/COUT ground pads and inductor ground. |
| AGND | Analog ground reference | Low-noise reference for error amplifier and bias circuitry; tied to PGND at single point on low-impedance plane. |
| SEL | Output voltage selection | Analog input; sets VOUT via resistor to AGND (e.g., 0Ω → 3.3V, 40.2kΩ → 3.6V); 1% tolerance required. |
| GPIO | POK open-drain output | D-option only; pulls low when VOUT ∈ [0.9×VOUT_TARGET, 1.1×VOUT_TARGET]; requires external 15kΩ pull-up to VIO. |
| EN | Enable control input | Active-high logic; 1.3V VIH threshold; internal 800kΩ pulldown ensures default disable during power-up. |
| OUTS | Output voltage sense | Connects directly to point-of-load; enables remote sensing to compensate for IR drop in output traces. |
| BIAS | Internal bias supply | Must be bypassed with 2.2μF X7R 10V ceramic; not externally loaded; powers internal LDO and control logic. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost mode transition | Eliminates output voltage discontinuity or dropout during VIN crossing VOUT, critical for uninterrupted SoC operation in battery-powered devices. |
| Configurable POK output (D-option) | Provides system-level power sequencing signal without external components; reduces BOM count and layout complexity in multi-rail designs. |
| Ultra-low 6μA quiescent current | Extends battery runtime in always-on applications (e.g., GPS trackers) by minimizing standby loss-measured with EN high, FPWM inactive. |
| Integrated active output discharge | 100Ω internal switch discharges VOUT rapidly upon shutdown, satisfying USB PD and mobile platform fast-power-down timing requirements. |
| Two ILIM options (3.6A/4.4A) | D-option's 3.6A limit allows smaller inductors and lower-cost MOSFETs while maintaining robustness for ≤3A continuous loads. |
Applications
| Asset Tracking Devices | Smartphone ToF Sensors |
|---|---|
|
Use Scenario: GPS/GSM module powered from single-cell Li-ion with deep discharge down to 1.8V. IC Role / Device Role / Timing Role: Primary system pre-regulator delivering stable 3.3V/3.6V to RF transceiver and MCU during wide VIN swing. Use Value: Maintains regulation through full battery discharge curve without brownouts; 6μA IQ extends location-reporting interval to >30 days on 500mAh cell. |
Use Scenario: Time-of-Flight depth sensor requiring low-noise, tightly regulated 2.8V supply during burst illumination. IC Role / Device Role / Timing Role: High-transient-response buck-boost supplying camera subsystem with fast load step recovery (<10μs). Use Value: 2.2MHz switching and four-phase H-bridge architecture deliver <15mV output deviation under 2A/μs load steps, preserving measurement accuracy. |
| 5G Cellular Modems | RF Power Amplifiers |
|
Use Scenario: Baseband processor and mmWave front-end powered from shared Li-ion battery with dynamic load profiles. IC Role / Device Role / Timing Role: Efficient intermediate bus converter stepping battery voltage to 3.8V for PA bias and 1.2V for digital core via secondary regulators. Use Value: 96% peak efficiency at 3.6VIN/3.3VOUT minimizes thermal load in sealed enclosures; POK signal validates rail stability before modem initialization. |
Use Scenario: GaN/SiGe RF amplifier requiring clean, ripple-free 5V supply with fast transient response during modulation peaks. IC Role / Device Role / Timing Role: Final-stage buck-boost delivering 5.0V from 3.6V nominal battery, compensating for IR drop under 2.5A pulsed loads. Use Value: Active output discharge ensures PA bias collapses within 5ms of shutdown, preventing latch-up or thermal runaway during fault conditions. |
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 (C-option) instead of POK output (D-option). | Requires external pull-up and logic-level translation if POK functionality is needed; lacks native POK assertion. | Select only if forced-PWM operation is required alongside identical package and current capability. |
| TPS63810YFFR | 2.5V–5.5V input, 1.8V–5.5V output, 4A ILIM, 2.4MHz fSW, but no POK output and higher 12μA IQ. | Supports wider VOUT range but lacks integrated power-good signaling; requires external monitoring circuit for sequencing. | Choose when higher output flexibility or 4A peak current is prioritized over POK integration and ultra-low IQ. |
Compared with MAX77839CEWL+T and TPS63810YFFR, the MAX77839DEWL+ uniquely combines POK output, 3.6A ILIM, and 6μA IQ in a 2.07mm × 1.51mm WLP-enabling smallest-footprint, lowest-quiescent, and self-signaling power management for space-constrained battery systems.
Availability
MAX77839DEWL+ is available at Aetrix Electronics and suitable for asset tracking, smartphone ToF sensors, 5G modems, and RF amplifier power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77839DEWL+ 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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and battery-powered consumer markets.
The MAX77839 product line delivers ultra-low-IQ, high-efficiency buck-boost regulators optimized for space- and energy-constrained portable electronics-including wearables, IoT edge nodes, and advanced mobile imaging subsystems.
FAQ
What is the GPIO function of the MAX77839DEWL+?
The MAX77839DEWL+ configures its GPIO pin as an open-drain POK (power-ok) output. When the regulated output voltage is within ±10% of the target value set by RSEL, the GPIO pin pulls low. An external 15kΩ pull-up resistor to VIO is required. This differs from A/B/C variants that offer FPWM input or alternate POK configurations.
What package and pin count does the MAX77839DEWL+ use?
The MAX77839DEWL+ uses a 15-bump wafer-level package (WLP), outline number 21-100441, with 0.4mm pitch and dimensions of 2.07mm × 1.51mm. It has 11 functional terminals mapped across the 15 bumps, including IN, OUT, LX1, LX2, PGND, AGND, SEL, GPIO, EN, OUTS, and BIAS.
What is the switching current limit for the MAX77839DEWL+?
The MAX77839DEWL+ is a "D" option device with a typical switching current limit (ILIM) of 3.6A. This value is specified in the Electrical Characteristics table under "High-Side Switching Current Limit" for C/D options, with min/typ/max of 3.24A/3.6A/3.96A at +25°C.
Does the MAX77839DEWL+ support active output discharge?
Yes, the MAX77839DEWL+ includes integrated active output discharge with a 100Ω internal switch between OUT and PGND. This switch activates automatically when the device is disabled via EN or latched off by protection circuits, discharging the output capacitor to <10% VOUT within approximately 10ms.
How is the output voltage set on the MAX77839DEWL+?
The output voltage of the MAX77839DEWL+ is set by connecting a resistor (RSEL) between the SEL pin and AGND. The IC reads this resistance to determine the target output voltage. For example, a 0Ω connection yields 3.3V, while a 40.2kΩ resistor sets 3.6V. Table 1 in the datasheet lists exact RSEL values for outputs from 2.3V to 5.3V.
MAX77839DEWL+ 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+ FAQ
1.How can I place an order for MAX77839DEWL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77839DEWL+ 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+ reliable?
The price and inventory of MAX77839DEWL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77839DEWL+ is usually 5 days.
3.What payment methods are accepted for MAX77839DEWL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77839DEWL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77839DEWL+?
MAX77839DEWL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77839DEWL+ 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+?
For technical support, including MAX77839DEWL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77839DEWL+ requirements.
6.How does Aetrix verify that MAX77839DEWL+ is sourced from the original manufacturer or authorized distributors?
All MAX77839DEWL+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX77839DEWL+?
All MAX77839DEWL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77839DEWL+, 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+ part is unused and in its original packaging.
Return procedure for MAX77839DEWL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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