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Analog Devices Inc./Maxim Integrated MAX77827AEWC+T
- Part No.:
- MAX77827AEWC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFBGA, WLBGA
- Datasheet:
-
MAX77827AEWC+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.6A 12WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
MAX77827AEWC+T from Maxim Integrated is a high-efficiency, ultra-low-quiescent-current buck-boost DC/DC converter designed for single-cell Li-ion battery systems. It delivers 2.3V–5.3V adjustable output with 3.1A switching current limit (buck mode), 96% peak efficiency at 3.3VIN/3.3VOUT, and 6μA typical IQ, enabling multi-day operation in wearables and LPWAN endpoints.
For engineers reviewing the MAX77827AEWC+T datasheet, MAX77827AEWC+T pinout, MAX77827AEWC+T application, or MAX77827AEWC+T equivalent, key selection criteria include its 1.8A/3.1A dual ILIM option, seamless buck-boost transition, WLP package footprint (1.61mm × 2.01mm), and integrated POK/FPWM GPIOs for system-level power sequencing and monitoring.
Technical Context
The MAX77827AEWC+T implements a four-switch H-bridge topology with fixed 2.5MHz PWM control and current-mode compensation, enabling continuous regulation across VIN < VOUT (boost), VIN ≈ VOUT (buck-boost boundary), and VIN > VOUT (buck) without mode switching artifacts. Its unique control algorithm ensures <250mV load transient response (10mA → 500mA in 15µs) and <50mV line transient response (3.4V → 2.9V in 25µs).
It features dual ILIM configuration (3.1A nominal for A/C variants), programmable soft-start (200µs typ), active output discharge (100Ω internal switch), and comprehensive protection including UVLO (1.75V rising threshold), thermal shutdown (+165°C), and cycle-by-cycle overcurrent detection with 3ms fault hold time and 12ms retry interval.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports full discharge curve of 1-cell Li-ion (2.8V–4.4V) plus USB/adapter input without external LDO. |
| Output Voltage Range | 2.3V to 5.3V - set by single resistor on SEL pin; enables direct powering of 3.3V logic, 4.2V PMIC rails, or 5V USB-peripheral interfaces. |
| Switching Current Limit | 3.1A (typ) - enables ≥1.6A output in buck mode at 3.3VOUT, sufficient for RF transceivers and display drivers in compact IoT nodes. |
| Quiescent Current | 6μA (typ at +25°C) - extends battery life in always-on sensor nodes; measured in SKIP mode with no load. |
| Peak Efficiency | 96% at 3.3VIN/3.3VOUT - minimizes thermal rise in sealed enclosures and maximizes runtime under sustained 500mA loads. |
| Switching Frequency | 2.5MHz (nominal) - allows use of small 1µH inductors and 22µF ceramic output capacitors, achieving <14.5mm² total solution size. |
| UVLO Threshold | 1.75V (rising), 1.68V (falling) - prevents brownout operation during deep battery discharge while avoiding premature shutdown near EOC. |
Pinout & Package
MAX77827AEWC+T is packaged in a 1.61mm × 2.01mm, 12-bump wafer-level package (WLP) with 0.4mm pitch, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Battery or adapter input; requires 10µF ceramic bypass to PGND for stability and EMI suppression. |
| OUT | Regulated Output | Main power rail; connects to 22µF ceramic capacitor and downstream loads; supports up to 1.6A continuous. |
| LX1 / LX2 | Switching Nodes | H-bridge power switches; connect to 1µH inductor; require low-inductance layout to minimize switching losses and EMI. |
| SEL | Analog Voltage Set | Resistor-divider input setting VOUT; open = 3.3V, short-to-GND = 3.3V, 909kΩ = 2.3V per Table 2. |
| FPWM | Digital Control Input | Active-high enable for forced PWM mode; eliminates frequency variation and output ripple at light loads. |
| POK | Open-Drain Status Output | Asserts high-impedance when VOUT ≥92.5% of target; requires external pull-up for MCU reset or power-good signaling. |
| EN | Digital Enable Input | Logic-high enables regulator; internal 100µs turn-on delay followed by 200µs soft-start for inrush control. |
| BIAS | Analog Bias Supply | Internal LDO output; bypass with 1µF ceramic to PGND to stabilize reference and control circuitry. |
| AGND / PGND | Ground Returns | Separate analog and power grounds; must be joined at single point near IC to avoid noise coupling into feedback path. |
| OUTS | Output Sense | High-impedance feedback node; connects directly to OUT for accurate regulation; routed away from noisy traces. |
Key Features
| Feature | Design Value |
|---|---|
| Four-Switch H-Bridge Topology | Enables seamless buck-boost transition with no output glitch or regulation loss when VIN crosses VOUT - critical for battery-powered systems with wide voltage swing. |
| 3.1A Switching Current Limit (A/C variants) | Supports higher output current in buck mode than B/D variants (1.8A), allowing smaller inductors and reduced solution size for 1A+ applications. |
| Ultra-Low 6μA Quiescent Current | Extends shelf life and standby runtime in always-on devices such as BLE beacons and NB-IoT sensors without compromising startup speed. |
| Integrated Active Output Discharge | 100Ω internal switch discharges VOUT within milliseconds after EN deassertion - eliminates need for external discharge FET and saves PCB area. |
| Programmable Soft-Start (200µs) | Reduces inrush current during power-up; shorter than B/D variants (1.5ms), enabling faster system wake-up in responsive wearable UIs. |
Applications
| Smart Wearables | LPWAN Endpoints |
|---|---|
Use Scenario: Compact fitness tracker powered by 120mAh Li-ion cell requiring stable 3.3V rail for MCU, accelerometer, and BLE radio across full battery range (4.2V → 2.8V). IC Role / Device Role / Timing Role: Primary system power regulator maintaining regulated 3.3V output regardless of input voltage drop below 3.3V, enabling uninterrupted sensor data logging and wireless transmission. Use Value: 96% peak efficiency and 6μA IQ extend battery life to >7 days; 2.5MHz switching allows tiny 1µH inductor and 0603 capacitors, fitting within 8mm × 8mm board area. | Use Scenario: NB-IoT meter reading node deployed in remote locations, operating intermittently with 10-second wake-up bursts every 15 minutes, powered by 800mAh Li-SOCl₂ cell. IC Role / Device Role / Timing Role: Always-on buck-boost supplying 3.6V to cellular modem and microcontroller; handles deep discharge down to 2.3V input while maintaining clean 3.6V output during transmit peaks. Use Value: 3.1A ILIM supports 800mA burst current for LTE transmission; POK signal triggers MCU only after VOUT stabilizes, eliminating false wake-ups from brownout conditions. |
| Smartphone Peripherals | Industrial Sensor Nodes |
Use Scenario: USB-C powered Bluetooth earbud charging case with integrated battery management, requiring 5.0V output from 3.7V Li-ion cell to charge earbuds via linear charger IC. IC Role / Device Role / Timing Role: Boost-mode DC/DC converter generating precise 5.0V rail; uses SEL resistor to set exact 5.0V output (RSEL = 56.2kΩ) for safe charging compliance. Use Value: Adjustable output eliminates need for external feedback resistors; FPWM pin forces constant-frequency operation during audio playback to suppress audible switching noise in sensitive analog audio paths. | Use Scenario: Wireless temperature/humidity sensor in factory automation, powered by primary lithium cell, operating at -40°C to +85°C with 10-year lifetime requirement. IC Role / Device Role / Timing Role: Primary power source delivering 3.3V to ultra-low-power MCU and digital sensor interface; operates continuously in SKIP mode during sleep, switching to PWM only during measurement/transmit cycles. Use Value: Guaranteed operation from -40°C to +125°C junction; thermal shutdown (+165°C) and UVLO (1.75V) prevent malfunction during extreme environmental stress or end-of-life battery 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 |
|---|---|---|---|
| TPS63802DLAR | 2.5V–5.5V input; 1.8V–5.5V output; 2A max output; 1.2MHz switching; 17μA IQ | Higher IQ reduces battery life in ultra-low-power applications; lower switching frequency requires larger magnetics. | Select when cost sensitivity outweighs quiescent current and board area constraints; verify thermal performance at 1.2MHz in same enclosure. |
| RTQ2134GSP | 2.5V–5.5V input; 2.5V–5.5V output; 2.5A max output; 2.2MHz switching; 12μA IQ | Fixed 2.5V–5.5V output range lacks fine SEL-based adjustment; no POK or FPWM pins for system integration. | Choose for simpler designs needing only coarse voltage selection and no power-good signaling; confirm compatibility with existing GPIO allocation. |
Compared with TPS63802DLAR and RTQ2134GSP, MAX77827AEWC+T provides the lowest IQ (6μA vs. ≥12μA), smallest WLP footprint (1.61mm × 2.01mm), and integrated POK/FPWM for deterministic power sequencing - making it optimal for miniaturized, battery-limited IoT endpoints where runtime and board area are critical.
Availability
MAX77827AEWC+T is available at Aetrix Electronics and suitable for smart wearables, LPWAN endpoints, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX77827AEWC+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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and consumer applications.
The MAX77827 product line targets ultra-low-power, space-constrained battery-operated devices - specifically engineered to maximize runtime and minimize solution size in wearables, IoT sensors, and portable medical equipment.
FAQ
What is the switching current limit specification for MAX77827AEWC+T?
The MAX77827AEWC+T has a nominal switching current limit of 3.1A (typical) in buck mode, as confirmed in Table 1 of the datasheet for A/C variants. This value is validated across -40°C to +125°C junction temperature and enables ≥1.6A continuous output at 3.3V. The 3.1A ILIM allows smaller external components compared to the 1.8A option in B/D variants, reducing overall solution size.
How does the SEL pin configure output voltage on MAX77827AEWC+T?
The SEL pin on MAX77827AEWC+T sets output voltage via an external resistor to AGND. Per Table 2, a 909kΩ resistor yields 2.3V, while an open circuit or short to GND gives 3.3V. The IC measures SEL resistance during startup (600µs after EN assertion) and configures internal reference accordingly. Resistor tolerance must be ≤1% for ±1% output accuracy.
Does MAX77827AEWC+T support forced PWM mode, and how is it enabled?
Yes, MAX77827AEWC+T supports forced PWM (FPWM) mode via the dedicated FPWM pin. Driving this pin high (≥1.3V) disables SKIP mode and locks the regulator into fixed-frequency 2.5MHz PWM operation regardless of load current. This reduces output ripple and eliminates audible noise - essential for analog-sensitive applications like audio codecs or precision ADCs.
What protection features are integrated into MAX77827AEWC+T?
MAX77827AEWC+T integrates UVLO (1.75V rising threshold), thermal shutdown (+165°C), cycle-by-cycle overcurrent protection (3ms fault hold, 12ms retry), soft-start (200µs), and active output discharge (100Ω internal switch). These functions operate autonomously without external components, ensuring robust operation during battery depletion, short circuits, or thermal overload in unattended deployments.
What is the package type and footprint of MAX77827AEWC+T?
MAX77827AEWC+T uses a 12-bump wafer-level package (WLP) measuring 1.61mm × 2.01mm with 0.4mm pitch (package code W121H2+1). This ultra-compact footprint is optimized for space-constrained designs such as hearing aids and smart patches. Land pattern follows Application Note 1891 and requires controlled-depth solder paste deposition for reliable assembly.
MAX77827AEWC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-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:
- 1.6A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WLP (1.61x2.01)
MAX77827AEWC+T FAQ
1.How can I place an order for MAX77827AEWC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77827AEWC+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 MAX77827AEWC+T reliable?
The price and inventory of MAX77827AEWC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77827AEWC+T is usually 5 days.
3.What payment methods are accepted for MAX77827AEWC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77827AEWC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77827AEWC+T?
MAX77827AEWC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77827AEWC+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 MAX77827AEWC+T?
For technical support, including MAX77827AEWC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77827AEWC+T requirements.
6.How does Aetrix verify that MAX77827AEWC+T is sourced from the original manufacturer or authorized distributors?
All MAX77827AEWC+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 MAX77827AEWC+T meets industry standards.
7.What is the process for return or replacement of MAX77827AEWC+T?
All MAX77827AEWC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77827AEWC+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 MAX77827AEWC+T part is unused and in its original packaging.
Return procedure for MAX77827AEWC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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