My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX77839AEFQ+T
- Part No.:
- MAX77839AEFQ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 11-UFQFN
- Datasheet:
-
MAX77839AEFQ+T.pdf
- Description:
- IC REG BUCK BST ADJ 3A 11FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,174
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX77839AEFQ+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 up to 3A continuous output current with 6μA quiescent current. It operates across 1.8V–5.5V input and supports 2.3V–5.3V adjustable output via single resistor (RSEL), using a 2.2MHz fixed-frequency current-mode control architecture in an 11-lead FC2QFN package.
For engineers reviewing the MAX77839AEFQ+T datasheet, MAX77839AEFQ+T pinout, MAX77839AEFQ+T application, or MAX77839AEFQ+T equivalent, key selection criteria include its 4.4A switching current limit (Option A), FPWM mode GPIO configuration, seamless buck-boost transition, active output discharge, and dual-package availability (WLP/FC2QFN) for space-constrained portable power designs.
Technical Context
The MAX77839AEFQ+T implements a four-switch H-bridge topology enabling continuous conduction across buck (VIN > VOUT) and boost (VIN < VOUT) modes without discontinuity. Its current-mode PWM control uses internal slope compensation and integrates cycle-by-cycle peak current limiting at 4.4A (typ), soft-start timeout (4ms), and thermal shutdown at +150°C.
It features dual GPIO functionality-configured as FPWM enable input (Option A)-allowing forced PWM operation regardless of load, eliminating skip-mode noise while maintaining ultra-low IQ (6μA) in light-load conditions. The SEL pin sets output voltage via external resistor, and OUTS provides remote sensing for ±1% regulation accuracy under load and line transients.
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. |
| Output Voltage Range | 2.3V to 5.3V - set by single RSEL resistor; enables precise system rail generation without external DAC or digital interface. |
| Switching Current Limit | 4.4A (typ) - Option A rating allows robust 3A continuous output with margin for transient peaks in RF power amplifiers. |
| Quiescent Current | 6μA - extends battery runtime in always-on asset tracking and cellular IoT devices during deep sleep. |
| Switching Frequency | 2.2MHz (typ) - permits use of compact 1μH inductors and reduces EMI filtering burden in smartphone ToF modules. |
| Peak Efficiency | 96% at VIN=3.6V, VOUT=3.3V - minimizes thermal dissipation in sealed enclosures like fleet management trackers. |
| GPIO Function | FPWM input - forces continuous PWM operation to suppress output ripple and improve load transient response in sensitive analog subsystems. |
Pinout & Package
The MAX77839AEFQ+T is housed in a 2.5mm × 2.0mm, 0.5mm pitch, 11-lead FC2QFN package with exposed thermal pad (F112A2F+1). Pin assignments are validated per Analog Devices' official package drawing 21-100431 and land pattern 90-100154.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Buck-boost input supply | Accepts 1.8V–5.5V battery or adapter input; requires dual 10μF X7R ceramic bypass capacitors directly at pin. |
| OUT | Regulated power output | Delivers 2.3V–5.3V at up to 3A; connects to load via low-impedance path with dedicated output capacitor bank. |
| LX1, LX2 | Switching nodes | H-bridge power switches; require short, wide traces to 1μH inductor to minimize switching loss and radiated EMI. |
| PGND | Power ground | High-current return path for IN, OUT, LX1/LX2; must be solid copper plane connected to thermal pad. |
| AGND | Analog ground | Reference for feedback and bias circuitry; tied to PGND at single point on low-noise ground plane. |
| EN | Enable control input | Active-high logic input; 100μs turn-on delay ensures stable bias before regulation begins. |
| GPIO | FPWM mode control | Option A configures as digital input: high = forced PWM, low = auto-skip mode for lowest IQ. |
| SEL | Output voltage selection | Analog input for RSEL resistor; determines target VOUT per Table 1 (e.g., 0Ω → 3.3V). |
| OUTS | Remote output sense | Connects to point-of-load to compensate for IR drop; enables ±1% regulation accuracy under dynamic load. |
| BIAS | Internal bias supply | Must be bypassed with 2.2μF X7R capacitor to AGND; powers internal LDOs and reference circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 6μA enables >10-year battery life in asset trackers operating 99% in deep sleep. |
| Seamless buck-boost transition | No output glitch or regulation dropout when crossing VIN = VOUT boundary (e.g., Li-ion discharging from 4.2V to 2.8V). |
| Active output discharge | Integrated 100Ω switch rapidly discharges output capacitor upon disable, preventing unsafe residual voltage in handheld devices. |
| Configurable FPWM mode | Eliminates variable-frequency skip mode noise-critical for camera sensor power in smartphones and ToF systems. |
| Comprehensive protection suite | Includes UVLO (1.75V rising), OVP (0.5V over OUT–OUTS), thermal shutdown (+150°C), and cycle-by-cycle current limit. |
Applications
| Asset Tracking / Fleet Management | 5G/2G/GSM Cellular Power |
|---|---|
Use Scenario: Long-life GPS/GNSS loggers powered by primary LiSOCl₂ cells in remote industrial assets. IC Role / Device Role / Timing Role: Primary pre-regulator converting 3.6V nominal battery to stable 3.3V system rail while maintaining μA-level sleep current. Use Value: 6μA IQ extends 2Ah cell lifetime beyond 10 years; 4.4A ILIM handles GSM burst transmission peaks without brownout. | Use Scenario: Compact LTE-M/NB-IoT modems requiring clean 3.8V RF PA supply from single Li-ion cell. IC Role / Device Role / Timing Role: Buck-boost regulator providing constant 3.8V output across full 4.2V→2.8V battery discharge curve. Use Value: Seamless mode transition prevents RF carrier dropouts; 2.2MHz switching avoids interference with cellular bands. |
| Smartphones ToF / Facial Recognition | RF Amplifier Power Supply |
Use Scenario: Time-of-Flight sensor module requiring low-noise, fast-transient 3.3V supply in thin bezel smartphones. IC Role / Device Role / Timing Role: High-PSRR, low-ripple power source with FPWM mode enabled to suppress switching noise near optical sensors. Use Value: Forced PWM eliminates skip-mode jitter; 96% efficiency minimizes heat in thermally constrained front-camera assemblies. | Use Scenario: GaAs/GaN RF power amplifier stage needing regulated 5.0V rail from 3.6V Li-ion battery in portable test equipment. IC Role / Device Role / Timing Role: Boost-mode regulator delivering 5.0V at 1.5A with tight line/load regulation for amplifier gain stability. Use Value: 2.3V–5.3V output range covers common PA voltages; 4.4A ILIM supports 2× transient current surges during modulation peaks. |
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 die, WLP package (2.07mm × 1.51mm), 3.6A ILIM, FPWM GPIO | Smaller footprint but lower current capability; higher thermal resistance (θJA = 61.65°C/W vs. 52.30°C/W) | Select for ultra-compact wearables where board area is critical and peak load ≤2.5A. |
| TPS63802DLAR | Texas Instruments part; 2.5V–5.5V input, 1.8V–5.5V output, 4A ILIM, 2.4MHz, no FPWM option | Fixed 1.8V–5.5V output range (no RSEL); uses PFM-only control-higher light-load IQ (12μA) and no forced-PWM mode | Choose when RSEL flexibility is unnecessary and FPWM is not required for noise-sensitive loads. |
Compared with MAX77839CEWL+T and TPS63802DLAR, the MAX77839AEFQ+T offers optimal balance of high current (4.4A), low IQ (6μA), FPWM controllability, and thermal performance in FC2QFN-making it preferred for cellular IoT and smartphone subsystems demanding both efficiency and signal integrity.
Availability
The MAX77839AEFQ+T is available at Aetrix Electronics and suitable for asset tracking, cellular IoT modems, and smartphone ToF sensor power applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77839AEFQ+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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The MAX77839 product line delivers ultra-low-IQ buck-boost regulators for battery-powered portable electronics, specifically engineered to maximize runtime while maintaining tight regulation and minimal solution size in space-constrained mobile and IoT platforms.
FAQ
What is the switching current limit for the MAX77839AEFQ+T?
The MAX77839AEFQ+T has a typical high-side switching current limit of 4.4A, as defined by its "A" option designation in the ordering matrix. This value is validated across temperature and process corners per Analog Devices' Electrical Characteristics table (ILIM = 4.05A min to 4.75A max at +25°C). It enables reliable 3A continuous output with headroom for transient surges in RF amplifier and cellular modem applications.
Does the MAX77839AEFQ+T support forced PWM (FPWM) mode?
Yes, the MAX77839AEFQ+T supports forced PWM mode via its GPIO pin, as confirmed by its "A" option designation (FPWM input). When GPIO is driven high, the device operates continuously in PWM mode regardless of load, eliminating skip-mode frequency variation and reducing output voltage ripple-critical for powering noise-sensitive analog circuits like ToF sensors and RF front-ends.
What package type is used by the MAX77839AEFQ+T?
The MAX77839AEFQ+T uses the 11-lead FC2QFN package (outline number 21-100431, package code F112A2F+1), measuring 2.5mm × 2.0mm with 0.5mm pitch and an exposed thermal pad. This package provides lower thermal resistance (θJA = 52.30°C/W on 4-layer board) than the WLP variant, making it suitable for higher-power portable applications where heat dissipation is critical.
How is the output voltage set on the MAX77839AEFQ+T?
The output voltage of the MAX77839AEFQ+T is set using a single external resistor (RSEL) connected between the SEL pin and AGND. The IC reads this resistance during startup to determine the target output voltage, with values ranging from 0Ω (3.3V) to 768kΩ (5.3V) per Table 1 in the datasheet. A 1% tolerance resistor is required for ±1% output accuracy under all operating conditions.
What protections are integrated into the MAX77839AEFQ+T?
The MAX77839AEFQ+T integrates undervoltage lockout (UVLO, 1.75V rising threshold), overvoltage protection (OVP, 0.5V above OUT–OUTS), cycle-by-cycle inductor peak current limiting (4.4A typ), thermal shutdown (+150°C), and active output discharge (100Ω internal switch). These protections ensure robust operation in harsh environments such as automotive telematics and industrial asset trackers without requiring external supervision circuitry.
MAX77839AEFQ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 11-UFQFN
- 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:
- 11-FC2QFN (2.5x2)
MAX77839AEFQ+T FAQ
1.How can I place an order for MAX77839AEFQ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77839AEFQ+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 MAX77839AEFQ+T reliable?
The price and inventory of MAX77839AEFQ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77839AEFQ+T is usually 5 days.
3.What payment methods are accepted for MAX77839AEFQ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77839AEFQ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77839AEFQ+T?
MAX77839AEFQ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77839AEFQ+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 MAX77839AEFQ+T?
For technical support, including MAX77839AEFQ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77839AEFQ+T requirements.
6.How does Aetrix verify that MAX77839AEFQ+T is sourced from the original manufacturer or authorized distributors?
All MAX77839AEFQ+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 MAX77839AEFQ+T meets industry standards.
7.What is the process for return or replacement of MAX77839AEFQ+T?
All MAX77839AEFQ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77839AEFQ+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 MAX77839AEFQ+T part is unused and in its original packaging.
Return procedure for MAX77839AEFQ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX77839AEFQ+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
