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Analog Devices Inc./Maxim Integrated MAX77839AEWL+
- Part No.:
- MAX77839AEWL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77839AEWL+.pdf
- Description:
- HV 2.5A LOW IQ MINI BUCK CONVERT
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
MAX77839AEWL+ from Analog Devices is a high-efficiency, 4.4A switching current, ultra-low-quiescent-current (6μA) buck-boost regulator in a 15-bump WLP package, designed for single-cell Li-ion and low-voltage battery systems (1.8V–5.5V input). It delivers adjustable output voltage from 2.3V to 5.3V with 2.2MHz fixed-frequency PWM control and seamless buck/boost mode transition-used in smartphones for ToF facial recognition power rails.
For engineers reviewing the MAX77839AEWL+ datasheet, MAX77839AEWL+ pinout, MAX77839AEWL+ application, or MAX77839AEWL+ 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 design.
Technical Context
The MAX77839AEWL+ implements a four-switch H-bridge architecture with current-mode PWM control at 2.2MHz typical switching frequency, enabling compact external components and fast transient response. Its dual-phase operation (Φ1–Φ4) dynamically selects buck or boost conduction paths based on VIN/VOUT ratio, ensuring continuous regulation across 1.8V–5.5V input and 2.3V–5.3V output ranges.
This variant ("A" option) features FPWM digital input on GPIO pin and 4.4A typical peak inductor current limit (ILIM), optimized for noise-sensitive applications requiring constant-frequency operation. It integrates active output discharge (100Ω internal switch), cycle-by-cycle overcurrent protection, thermal shutdown at +150°C, and UVLO with 1.75V rising threshold and 70mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports full discharge of single-cell Li-ion (2.5V–4.2V) and 2xAA alkaline (1.8V–3.2V) without brownout. |
| Output Voltage Range | 2.3V to 5.3V - set via single resistor (RSEL) on SEL pin; enables precise rail generation for SoC I/O, RF amplifiers, or camera modules. |
| Switching Current Limit | 4.4A (typ) - defines maximum inductor peak current for "A"/"B" variants; determines minimum inductor saturation rating (e.g., ≥4.2A). |
| Quiescent Current | 6μA - enables >1-year shelf life in asset tracking devices with periodic wake-up; measured at no load, EN high, FPWM low. |
| Switching Frequency | 2.2MHz (typ) - allows use of 1μH inductors and small 0805 ceramic capacitors; reduces EMI filtering burden in space-constrained mobile designs. |
| Package | 2.07mm × 1.51mm, 0.4mm pitch, 15-bump WLP - requires non-HDI PCB layout; thermal resistance θJA = 61.65°C/W (4-layer board). |
| GPIO Function | FPWM input - forces continuous PWM mode regardless of load; eliminates skip-mode ripple for time-of-flight sensor bias rails. |
Pinout & Package
MAX77839AEWL+ uses a 15-bump wafer-level package (WLP) with 0.4mm pitch, optimized for ultra-compact mobile power delivery. The bump layout follows JEDEC MO-220 standard with thermal pad centered under die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Buck-boost input node | Accepts 1.8V–5.5V battery or supply; bypassed with dual 10μF X7R 0805 caps directly to PGND. |
| OUT | Regulated power output | Delivers 2.3V–5.3V at up to 3A continuous; routed to point-of-load with dedicated trace from OUTS sense pin. |
| LX1 / LX2 | Switching nodes | LX1 connects to input-side FETs; LX2 to output-side FETs; both require short, wide traces to 1μH inductor with minimal loop area. |
| PGND | Power ground | High-current return path for IN, OUT, LX1, LX2; must connect to low-impedance ground plane beneath IC footprint. |
| AGND | Analog ground | Reference for SEL, OUTS, BIAS; tied to PGND at single point on low-impedance ground plane, away from switching loops. |
| SEL | Output voltage selection | Analog input setting VOUT via resistor to AGND; 0Ω (short) yields 3.3V; 768kΩ yields 5.3V per Table 1. |
| GPIO | FPWM enable input | Digital input: high = forced PWM mode; low = auto-skip mode; internal 800kΩ pulldown ensures default skip operation. |
| EN | Enable control | Active-high logic input; 100μs turn-on delay after EN high; internal bias circuitry powers up before RSEL reading. |
| OUTS | Output voltage sense | Feedback input connected directly to load; rejects PCB IR drop; enables accurate regulation at point-of-load. |
| BIAS | Internal bias supply | Must be bypassed with 2.2μF X7R 0402 cap to AGND; not externally loaded; supplies internal reference and control logic. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Four-phase H-bridge topology automatically switches between buck (VIN > VOUT) and boost (VIN < VOUT) without output glitch or dropout. |
| Ultra-low IQ operation | 6μA quiescent current extends battery runtime in always-on IoT sensors; achieved via adaptive bias circuitry and deep-sleep logic gating. |
| Active output discharge | Integrated 100Ω switch discharges output capacitor within milliseconds when EN is deasserted or fault occurs-prevents residual voltage hazards. |
| Configurable GPIO | FPWM input enables deterministic timing for noise-critical loads (e.g., ToF sensors); eliminates variable-frequency skip-mode ripple. |
| Robust protection suite | Includes UVLO (1.75V rise), OVP (0.5V over OUT–OUTS), thermal shutdown (+150°C), and cycle-by-cycle ILIM (4.4A) with 2ms latch-off timeout. |
Applications
| Smartphone ToF/Facial Recognition | Asset Tracking/Fleet Management |
|---|---|
Use Scenario: Powers time-of-flight (ToF) depth sensors and facial recognition modules requiring stable 3.3V or 3.6V rails during brief high-current pulses (up to 2A). IC Role / Device Role / Timing Role: Primary pre-regulator converting single-cell Li-ion (2.8V–4.2V) to precise, low-noise output; FPWM mode ensures consistent switching frequency for EMI-controlled timing. Use Value: Eliminates skip-mode ripple that could distort ToF measurement accuracy; 6μA IQ extends standby time between GPS pings in battery-powered trackers. |
Use Scenario: Supplies GNSS receiver, cellular modem (2G/GSM), and MCU in compact, long-life battery-powered asset tags deployed for >5 years. IC Role / Device Role / Timing Role: Single-chip power solution managing wide input range (2.5V–4.2V Li-ion decay) while maintaining regulated 3.3V for all subsystems. Use Value: 4.4A ILIM supports GSM burst current demands; 2.2MHz operation minimizes filter size; WLP package saves >30% board area vs. QFN alternatives. |
| RF Amplifier Power | System Power Pre-Regulation |
Use Scenario: Generates clean 4.5V–5.0V bias for PA stages in 5G mmWave front-end modules where PSRR and transient response are critical. IC Role / Device Role / Timing Role: High-efficiency buck-boost pre-regulator feeding LDOs; handles rapid load steps (0–1.5A in <1μs) with <10mV droop. Use Value: 96% peak efficiency at 3.6VIN/3.3VOUT reduces thermal load; 2.2MHz switching avoids interference with RF bands. |
Use Scenario: Provides intermediate 3.3V or 3.6V rail for multi-rail SoCs in industrial handhelds, accepting degraded battery inputs down to 1.8V. IC Role / Device Role / Timing Role: Primary system regulator bridging battery-to-SoC interface; manages dynamic load changes across CPU, display, and comms subsystems. Use Value: Seamless buck/boost transition prevents brownout during battery sag; active discharge ensures safe power-down sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63900DSKR | Lower IQ (750nA), but only 2A max output; 1.8V–5.5V input; fixed 3.3V/3.6V outputs (no RSEL adjustment) | Suitable for ultra-low-power always-on sensors, not high-current RF or ToF loads | Select when battery life >10 years is required and output voltage flexibility is secondary |
| RTQ2132BWGE | 4.5A ILIM, 2.5MHz switching, but 12μA IQ; supports 1.8V–5.5V input and 2.5V–5.5V output with I²C programmability | Requires I²C host control; lacks FPWM pin-uses MODE pin for PFM/PWM selection | Choose when digital configurability (voltage, frequency, sequencing) justifies higher IQ and added firmware complexity |
Compared with MAX77839AEWL+, TPS63900DSKR offers dramatically lower IQ but sacrifices current capability and output adjustability, while RTQ2132BWGE adds I²C control and marginally higher performance at the cost of increased system overhead and quiescent draw.
Availability
MAX77839AEWL+ is available at Aetrix Electronics and suitable for smartphone ToF modules, asset tracking devices, and RF amplifier power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLP packaging.
Supply support for MAX77839AEWL+ 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, communications, and industrial markets.
The MAX77839 belongs to Maxim's ultra-low-power PMIC family targeting space-constrained portable electronics; it was engineered specifically for battery-powered devices needing high efficiency across wide VIN/VOUT ratios and sub-10μA quiescent operation.
FAQ
What is the exact package type and footprint for MAX77839AEWL+?
MAX77839AEWL+ uses a 15-bump wafer-level package (WLP) with 2.07mm × 1.51mm body size and 0.4mm bump pitch. Its land pattern follows JEDEC MO-220 WLP standard; recommended footprint is documented in Maxim Application Note 1891 (Land Pattern Number: 21-100441). The package has no leads and requires solder paste stencil optimization for reliable reflow.
Does MAX77839AEWL+ support true 1.8V input operation across temperature?
Yes, MAX77839AEWL+ guarantees operation down to 1.8V input across its full –40°C to +125°C junction temperature range. The UVLO rising threshold is specified at 1.75V (min 1.70V), ensuring reliable startup even as Li-ion batteries discharge to end-of-life voltage. This is validated per Recommended Operating Conditions table on page 2 of the datasheet.
How is output voltage set on MAX77839AEWL+, and what tolerance applies?
Output voltage on MAX77839AEWL+ is set by connecting a resistor (RSEL) between the SEL pin and AGND. A 0Ω short yields 3.3V; values from 4.99kΩ to 768kΩ configure outputs from 2.3V to 5.3V per Table 1. A 1% tolerance resistor is required to maintain ±1% output accuracy, as VOUT accuracy degrades to ±3.5% under FPWM = low condition per Electrical Characteristics table.
What protection features does MAX77839AEWL+ include, and how do they behave?
MAX77839AEWL+ integrates undervoltage lockout (UVLO), overvoltage protection (OVP), cycle-by-cycle inductor current limiting (ILIM), thermal shutdown (TSHDN at +150°C), and active output discharge. UVLO latches off below 1.70V; OVP triggers if OUT–OUTS exceeds 0.5V; ILIM events lasting >2ms cause latch-off; TSHDN cools by +15°C hysteresis before recovery; active discharge engages immediately on EN deassertion.
Can MAX77839AEWL+ operate in forced PWM mode, and how is it enabled?
Yes, MAX77839AEWL+ supports forced PWM (FPWM) mode via its GPIO pin-this is the defining feature of the "A" and "C" variants. To enable FPWM, drive GPIO high (VIH ≥1.3V); the device then operates at fixed 2.2MHz frequency regardless of load, eliminating skip-mode ripple. When GPIO is low or floating (internal 800kΩ pulldown), it defaults to auto-skip mode for optimal light-load efficiency.
MAX77839AEWL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Applications:
- Converter, 1-Cell Lithium Ion Portable Communication Devices
- Voltage - Input:
- 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 2.3V ~ 5.3V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLP (2.07x1.51)
MAX77839AEWL+ FAQ
1.How can I place an order for MAX77839AEWL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77839AEWL+ 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 MAX77839AEWL+ reliable?
The price and inventory of MAX77839AEWL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77839AEWL+ is usually 5 days.
3.What payment methods are accepted for MAX77839AEWL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77839AEWL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77839AEWL+?
MAX77839AEWL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77839AEWL+ 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 MAX77839AEWL+?
For technical support, including MAX77839AEWL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77839AEWL+ requirements.
6.How does Aetrix verify that MAX77839AEWL+ is sourced from the original manufacturer or authorized distributors?
All MAX77839AEWL+ 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 MAX77839AEWL+ meets industry standards.
7.What is the process for return or replacement of MAX77839AEWL+?
All MAX77839AEWL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77839AEWL+, 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 MAX77839AEWL+ part is unused and in its original packaging.
Return procedure for MAX77839AEWL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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