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Analog Devices Inc./Maxim Integrated MAX77839CEWL+
- Part No.:
- MAX77839CEWL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77839CEWL+.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
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Product details
Overview
The MAX77839CEWL+ from Analog Devices is a high-efficiency, 3.6A switching-current buck-boost regulator in a 15-bump wafer-level package (WLP), designed for single-cell Li-ion and low-voltage battery systems (1.8V–5.5V input). It delivers adjustable output voltage (2.3V–5.3V) with 6μA quiescent current, 2.2MHz fixed-frequency operation, and integrated active output discharge-enabling ultra-low-power asset tracking and smartphone ToF sensor power rails.
For engineers reviewing the MAX77839CEWL+ datasheet, MAX77839CEWL+ pinout, MAX77839CEWL+ application, or MAX77839CEWL+ equivalent, this page provides verified technical context, validated pin functions, confirmed WLP package mapping, real-world application constraints, and two rigorously cross-checked alternative parts for system-level power architecture decisions.
Technical Context
The MAX77839CEWL+ implements a four-switch H-bridge buck-boost topology with current-mode PWM control at 2.2MHz typical switching frequency. It supports seamless mode transition between buck (VIN > VOUT) and boost (VIN < VOUT) using phase-controlled switching (Φ1–Φ4), enabling stable regulation across 1.8V–5.5V input while delivering up to 3A continuous output current.
Its control architecture integrates cycle-by-cycle inductor peak current limiting (3.6A typ), thermal shutdown (+150°C), undervoltage lockout (1.75V rising threshold), overvoltage protection (0.5V OUT–OUTS differential), and skip-mode operation for light-load efficiency-managed via dedicated EN, SEL, GPIO, and OUTS pins with defined analog/digital roles per pin description table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports full discharge of single-cell Li-ion, LiSOCl₂, and dual-AA batteries without external pre-regulation. |
| Output Voltage Range | 2.3V to 5.3V - set by single resistor (RSEL) on SEL pin; enables precise rail generation for RF amplifiers or image sensors. |
| Switching Current Limit | 3.6A (typ) - defines maximum inductor peak current for C/D variants; constrains external inductor saturation rating and PCB trace sizing. |
| Quiescent Current | 6μA - enables multi-year battery life in always-on IoT trackers operating in deep-sleep states. |
| Switching Frequency | 2.2MHz (typ) - allows use of compact 1μH inductors and reduces EMI filter footprint versus lower-frequency converters. |
| Package | 2.07mm × 1.51mm, 15-bump WLP, 0.4mm pitch - ultra-small footprint ideal for space-constrained mobile and wearable PCBs. |
| Efficiency | 96% peak (VIN = 3.6V, VOUT = 3.3V) - minimizes thermal rise in sealed enclosures and extends runtime under sustained load. |
Pinout & Package
MAX77839CEWL+ uses the 15-bump wafer-level package (WLP), outline number 21-100441, with 0.4mm pitch and bottom-side bump layout. Thermal resistance θJA = 61.65°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Buck-boost input node | Accepts 1.8V–5.5V battery input; requires dual 10μF X7R ceramic bypass capacitors directly at bump to PGND. |
| OUT | Power output node | Delivers regulated 2.3V–5.3V; connects to load via low-impedance path; bypassed with 47μF X7R capacitor. |
| LX1, LX2 | Switching nodes | High-dV/dt nodes connecting internal H-bridge FETs to external inductor; require shortest possible PCB traces and vias. |
| PGND | Power ground | Return path for high-current switching loops; must be solid copper plane directly beneath IC and connected to IN/OUT caps. |
| AGND | Analog ground | Reference for feedback and bias circuitry; tied to PGND at single point on low-noise ground plane. |
| SEL | Output voltage selection | Analog input setting VOUT via resistor to AGND; value determines target regulation point per Table 1 (e.g., 0Ω → 3.3V). |
| GPIO | Configurable I/O | In MAX77839CEWL+, configured as FPWM input (high = forced PWM, low = auto-skip); controls light-load efficiency mode. |
| EN | Enable control | Active-high digital input; 100μs turn-on delay after high assertion; initiates soft-start sequence and bias startup. |
| OUTS | Output voltage sense | Feedback input for closed-loop regulation; routed directly to point-of-load to compensate for IR drop in output traces. |
| BIAS | Internal bias supply | Provides internal LDO reference; bypassed with 2.2μF X7R capacitor to AGND; not externally loaded. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor VOUT programming | Enables precise rail tuning (2.3V–5.3V) without DAC or external feedback divider-reducing BOM count and layout area. |
| Active output discharge | Integrated 100Ω switch discharges output capacitor when disabled, preventing residual voltage hold-up in power sequencing. |
| Configurable GPIO (FPWM) | For MAX77839CEWL+, GPIO serves as FPWM enable: high forces continuous PWM (low ripple), low enables skip mode (6μA IQ). |
| Ultra-low quiescent current | 6μA IQ in skip mode extends battery life in intermittent wake-up applications like GPS asset trackers operating <1% duty cycle. |
| Robust protection suite | Includes UVLO (1.75V), OVP (0.5V OUT–OUTS), thermal shutdown (+150°C), and cycle-by-cycle current limit-no external fault logic needed. |
Applications
| Asset Tracking Power | Smartphone ToF Sensor Rail |
|---|---|
Use Scenario: GPS/GSM module powered from single-cell Li-ion in logistics tag, operating in 10s wake-up cycles with deep sleep between transmissions. IC Role / Device Role / Timing Role: Primary system pre-regulator converting 2.8V–4.2V battery to stable 3.3V rail for modem and MCU. Use Value: 6μA IQ and skip-mode operation extend battery life beyond 5 years; 2.2MHz switching enables compact 1μH inductor and minimal PCB area. |
Use Scenario: Time-of-flight depth sensor requiring clean, fast-transient 3.3V supply during pulsed laser illumination in smartphone front camera modules. IC Role / Device Role / Timing Role: High-bandwidth buck-boost regulator supplying sensor ASIC with sub-10mV ripple and <10μs load transient recovery. Use Value: Seamless buck/boost transition prevents brownout during battery sag; FPWM mode (GPIO high) ensures consistent ripple under dynamic load. |
| RF Amplifier Bias | System Pre-Regulation |
Use Scenario: 5G mmWave PA bias rail in portable hotspot, where input voltage varies from 3.0V (discharged) to 4.4V (charged) during operation. IC Role / Device Role / Timing Role: Efficient intermediate regulator stepping battery to fixed 4.0V PA supply, rejecting input ripple and supporting burst transmit loads. Use Value: 96% peak efficiency minimizes thermal impact on sensitive RF front-end; 3.6A ILIM supports 2.5A peak PA current pulses. |
Use Scenario: Central power stage in industrial handheld scanner, generating 3.6V main system rail from wide-input battery or USB source. IC Role / Device Role / Timing Role: Primary DC-DC converter feeding downstream LDOs and PMICs; handles line/load transients and battery voltage decay. Use Value: Integrated protections (UVLO, OVP, TSHDN) eliminate need for external supervisors; WLP package saves >30% board area vs. QFN alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX77839AEWL+ | Higher 4.4A switching current limit; identical WLP package, pinout, and FPWM GPIO configuration. | Suitable for higher-current loads (e.g., 5G baseband processors) where 3.6A ILIM of MAX77839CEWL+ is marginal. | Select MAX77839AEWL+ only if peak inductor current exceeds 3.6A; otherwise MAX77839CEWL+ offers better light-load efficiency. |
| TPS63802DLAR | 3.2A ILIM, 2.4MHz switching, 7μA IQ; 2.5mm × 2.0mm 11-pin QFN package-not pin-compatible with WLP. | Targets similar battery-powered apps but requires PCB redesign due to different footprint, thermal pad, and pin assignment. | Choose TPS63802DLAR only when FC2QFN is preferred over WLP or when TI's ecosystem integration (e.g., WEBENCH) is required. |
Compared with MAX77839AEWL+, MAX77839CEWL+ trades 0.8A peak current headroom for optimized light-load efficiency and identical WLP integration; versus TPS63802DLAR, it offers superior quiescent current and smaller footprint but requires Maxim-specific layout practices and no direct pin replacement.
Availability
MAX77839CEWL+ is available at Aetrix Electronics and suitable for asset tracking, smartphone ToF sensor power, RF amplifier bias, and system pre-regulation requiring stable component supply across automotive-grade temperature range (-40°C to +125°C) and long-lifecycle production.
Supply support for MAX77839CEWL+ 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, automotive, and communications markets.
The MAX77839 product line delivers ultra-low-IQ buck-boost regulators for battery-constrained portable electronics, emphasizing seamless mode transition, minimal solution size, and robust protection for mission-critical power rails.
FAQ
What is the switching current limit for MAX77839CEWL+?
The MAX77839CEWL+ has a typical switching current limit of 3.6A, as specified in its ordering code "C" variant. This value defines the peak inductor current threshold for cycle-by-cycle overcurrent protection and determines minimum inductor saturation rating. The limit is confirmed in Electrical Characteristics Table (ILIM, C/D options) and applies across -40°C to +125°C junction temperature.
Does MAX77839CEWL+ support forced PWM mode?
Yes, MAX77839CEWL+ supports forced PWM mode via its GPIO pin, which is configured as an FPWM input (per Ordering Information and Pin Description). Driving GPIO high forces continuous PWM operation regardless of load, eliminating skip-mode noise-critical for RF and imaging applications requiring low output ripple.
What package type does MAX77839CEWL+ use?
MAX77839CEWL+ uses a 15-bump wafer-level package (WLP) with 2.07mm × 1.51mm body size and 0.4mm pitch, outlined in Package Information as W151K2Z+1. This ultra-compact package is distinct from the FC2QFN option and requires specific HDI-optional PCB land patterns referenced in Application Note 1891.
How is output voltage set on MAX77839CEWL+?
Output voltage on MAX77839CEWL+ is set by connecting a resistor (RSEL) between the SEL pin and AGND. The device reads this resistance to determine target VOUT per Table 1-for example, a 0Ω short sets 3.3V, while 4.99kΩ yields 2.3V. Resistor tolerance must be ≤1% to maintain ±1% output accuracy.
What protections are integrated into MAX77839CEWL+?
MAX77839CEWL+ integrates undervoltage lockout (UVLO, 1.75V rising), overvoltage protection (OVP, 0.5V OUT–OUTS differential), cycle-by-cycle inductor peak current limiting (3.6A), thermal shutdown (+150°C), and active output discharge. All protections trigger automatic latch-off and require EN or VIN cycling to recover-no external supervision circuitry needed.
MAX77839CEWL+ 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)
MAX77839CEWL+ FAQ
1.How can I place an order for MAX77839CEWL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77839CEWL+ 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 MAX77839CEWL+ reliable?
The price and inventory of MAX77839CEWL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77839CEWL+ is usually 5 days.
3.What payment methods are accepted for MAX77839CEWL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77839CEWL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77839CEWL+?
MAX77839CEWL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77839CEWL+ 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 MAX77839CEWL+?
For technical support, including MAX77839CEWL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77839CEWL+ requirements.
6.How does Aetrix verify that MAX77839CEWL+ is sourced from the original manufacturer or authorized distributors?
All MAX77839CEWL+ 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 MAX77839CEWL+ meets industry standards.
7.What is the process for return or replacement of MAX77839CEWL+?
All MAX77839CEWL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77839CEWL+, 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 MAX77839CEWL+ part is unused and in its original packaging.
Return procedure for MAX77839CEWL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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