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Analog Devices Inc./Maxim Integrated MAX77827CEWC+T
- Part No.:
- MAX77827CEWC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFBGA, WLBGA
- Datasheet:
-
MAX77827CEWC+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.8A 12WLP
- Quantity:
- Payment:
- Shipping:
Inventory:7,982
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Product details
Overview
MAX77827CEWC+T from Maxim Integrated is a high-efficiency, ultra-low-quiescent-current buck-boost DC/DC regulator 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. It enables compact power rail generation in space-constrained wearables and LPWAN endpoints.
For engineers reviewing the MAX77827CEWC+T datasheet, MAX77827CEWC+T pinout, MAX77827CEWC+T application, or MAX77827CEWC+T equivalent, key selection criteria include its 1.61mm × 2.01mm 12-bump WLP package, H-bridge topology enabling seamless buck/boost transition, SKIP/PWM mode flexibility, and dual ILIM options tied to specific part variants.
Technical Context
The MAX77827CEWC+T implements a four-switch H-bridge buck-boost topology operating at 2.25–2.75MHz fixed-frequency PWM control with current-mode compensation. Its architecture supports continuous regulation across VIN < VOUT (boost), VIN = VOUT (pass-through), and VIN > VOUT (buck) without mode switching artifacts.
It features integrated soft-start (200µs typ), active output discharge (100Ω internal switch), and cycle-by-cycle overcurrent protection with 3.1A peak ILIM (confirmed for A/C variants). UVLO thresholds are set to 1.75V (rising) / 1.68V (falling) for this variant, distinct from B/D options.
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. |
| Output Voltage Range | 2.3V to 5.3V - resistor-programmable via SEL pin; enables single IC to serve multiple rail requirements. |
| Switching Current Limit | 3.1A (typ) - enables up to 1.6A output current in buck mode (VIN=3.8V, VOUT=3.3V), reducing external component stress. |
| Quiescent Current | 6μA (typ) - minimizes battery drain during system sleep, critical for multi-year IoT endpoint operation. |
| Peak Efficiency | 96% - achieved at 3.3VIN/3.3VOUT, directly reducing thermal load and extending runtime in portable devices. |
| Switching Frequency | 2.5MHz (nominal) - allows use of small 1μH inductors and low-ESR ceramic capacitors, shrinking total solution size to 14.52mm². |
| UVLO Threshold | 1.75V (rising), 1.68V (falling) - prevents erratic operation during deep battery discharge while maintaining compatibility with low-VMIN chemistries. |
Pinout & Package
MAX77827CEWC+T is packaged in a 1.61mm × 2.01mm, 12-bump wafer-level package (WLP) with 0.4mm pitch. This ultra-compact, bottom-terminal package enables direct integration into thin-profile wearable PCBs and constrained IoT modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Bypassed to PGND with 10μF capacitor; accepts 1.8V–5.5V supply, including partially discharged Li-ion cells. |
| OUT | Regulated Output | Delivers 2.3V–5.3V programmable rail; bypassed to PGND with 22μF capacitor for low-noise operation. |
| LX1, LX2 | Switching Nodes | Connect to opposite ends of single 1μH inductor; support H-bridge energy transfer in all buck/boost modes. |
| SEL | Analog Voltage Set | Resistor-divider input determining output voltage per Table 2; enables precise rail tuning without DAC or digital interface. |
| FPWM | Digital Control Input | Active-high signal forcing continuous PWM mode-reduces output ripple for noise-sensitive analog/RF circuits. |
| POK | Open-Drain Status Output | Asserts high when VOUT ≥ 92.5% of target; used for system power sequencing and fault detection. |
| EN | Enable Input | Logic-controlled startup/shutdown; internal pull-down ensures default-off state for safe power-up sequencing. |
| BIAS | Internal Bias Supply | Bypassed to PGND with 1μF capacitor; powers internal reference and control circuitry independently of main rail. |
| AGND / PGND | Analog & Power Ground | Separate ground pins minimize noise coupling between sensitive control circuitry and high-current switching paths. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless Buck-Boost Transition | H-bridge topology eliminates mode-switching discontinuities, ensuring stable output during battery voltage sag across 2.8V–4.2V range. |
| Ultra-Low Quiescent Current | 6μA typical IQ extends battery life in always-on sensors and BLE/Wi-Fi wake-on-event applications. |
| Configurable Switching Current Limit | 3.1A ILIM option (A/C variants) supports higher output current without increasing inductor size or cost. |
| Integrated Active Output Discharge | 100Ω internal switch discharges output capacitor on disable, preventing residual voltage from interfering with downstream logic states. |
| SKIP/PWM Mode Selection | Automatic light-load SKIP mode maximizes efficiency; FPWM pin forces PWM for lowest ripple in RF/analog subsystems. |
Applications
| Smart Wearables | LPWAN Endpoints |
|---|---|
Use Scenario: Compact fitness tracker with optical heart-rate sensor, BLE radio, and OLED display powered by single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Primary system power regulator delivering stable 3.3V rail across full battery discharge (4.2V → 2.8V). Use Value: 96% peak efficiency and 6μA IQ extend runtime by >20% versus comparable buck-only solutions; 12-bump WLP fits within 3.63mm × 4.00mm board area. |
Use Scenario: NB-IoT gas sensor node deployed in remote locations with 10-year battery life requirement. IC Role / Device Role / Timing Role: Always-on power management IC supplying 3.0V to MCU and cellular modem during periodic wake-up bursts. Use Value: 6μA IQ enables >10-year operation on CR2032; SKIP mode maintains >85% efficiency at 100μA load; POK signal validates rail before modem activation. |
| Smartphone Peripherals | Industrial Handheld Scanners |
Use Scenario: USB-C powered wireless charging receiver module requiring regulated 5V output from variable 3.0–5.5V input. IC Role / Device Role / Timing Role: Buck-boost converter generating clean 5.0V rail for Qi transmitter IC and MCU, independent of source voltage. Use Value: 2.5MHz switching frequency enables use of tiny 1μH inductor; 3.1A ILIM handles 2W burst loads during coil activation without derating. |
Use Scenario: Rugged barcode scanner using 2-cell alkaline batteries (2.0–3.2V) powering 3.3V logic and laser diode driver. IC Role / Device Role / Timing Role: Wide-input buck-boost regulator maintaining 3.3V rail as battery voltage drops from 3.2V to 2.0V. Use Value: 1.8V–5.5V input range covers full alkaline discharge curve; UVLO at 1.75V prevents brownout resets; active discharge clears rail before cold reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLCT | 2.5V–5.5V input; 1.8V–5.5V output; 2A max output; 1.2MHz switching; no FPWM pin; 17μA IQ | Lower IQ and no forced-PWM mode limit suitability for ultra-low-power or low-ripple applications. | Select when board space allows larger inductor and 17μA IQ is acceptable; avoid where POK signaling or sub-10μA sleep current is required. |
| NCP1529MUTBG | 2.5V–5.5V input; 2.5V–5.0V output; 1.2A max output; 2MHz switching; 25μA IQ; no active discharge or POK | Lacks active discharge, POK, and programmable UVLO-requires external components for safe shutdown and sequencing. | Choose for cost-sensitive, non-critical applications where 25μA IQ and absence of safety features are acceptable trade-offs. |
Compared with TPS63802DLCT and NCP1529MUTBG, the MAX77827CEWC+T provides superior ultra-low-power performance (6μA vs. ≥17μA), integrated POK and active discharge for robust system control, and a smaller 12-bump WLP footprint-making it optimal for miniaturized, long-life battery-powered designs demanding high reliability.
Availability
MAX77827CEWC+T is available at Aetrix Electronics and suitable for smart wearables, LPWAN endpoints, and industrial handheld scanners requiring stable component supply and long-term lifecycle support.
Supply support for MAX77827CEWC+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 optimizing for single-cell Li-ion systems requiring seamless buck-boost regulation, minimal quiescent current, and integrated protection features.
FAQ
What is the switching current limit specification for MAX77827CEWC+T?
The MAX77827CEWC+T has a confirmed 3.1A typical switching current limit (ILIM_LX) in buck mode, as specified in Table 1 of the datasheet for A/C variants. This enables higher output current capability compared to the 1.8A option in B/D variants, supporting up to 1.6A continuous load at 3.3V output with appropriate thermal design.
Does MAX77827CEWC+T support forced PWM mode, and how is it enabled?
Yes, MAX77827CEWC+T supports forced PWM (FPWM) mode via its dedicated FPWM pin (Pin B2 in WLP). Driving this pin high forces continuous PWM operation regardless of load current, reducing output voltage ripple-critical for powering RF transceivers or precision analog circuits where SKIP mode noise is unacceptable.
What package type is used for MAX77827CEWC+T, and what are its dimensions?
MAX77827CEWC+T uses a 12-bump wafer-level package (WLP) with outline number 21-100302. Its physical dimensions are 1.61mm × 2.01mm with 0.4mm bump pitch. This ultra-compact package minimizes PCB area and is optimized for thin-profile portable electronics such as hearables and medical patches.
How does the UVLO threshold differ for MAX77827CEWC+T compared to other MAX77827 variants?
MAX77827CEWC+T belongs to the A/C variant group, featuring SYS UVLO rising threshold of 1.75V and falling threshold of 1.68V. This is distinct from B/D variants (2.5V/2.05V), enabling reliable operation down to deeper battery discharge levels-essential for maximizing usable capacity in 1-cell Li-ion systems.
What is the role of the SEL pin on MAX77827CEWC+T, and how is output voltage set?
The SEL pin on MAX77827CEWC+T is an analog input that sets output voltage via an external resistor divider to AGND. Using resistor values from Table 2 (e.g., 56.2kΩ for 3.2V), designers program VOUT from 2.3V to 5.3V without digital interface-simplifying BOM and layout while maintaining precision across temperature.
MAX77827CEWC+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):
- 2.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.3V
- Voltage - Output (Max):
- 5.3V
- Current - Output:
- 1.8A (Switch)
- 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)
MAX77827CEWC+T FAQ
1.How can I place an order for MAX77827CEWC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77827CEWC+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 MAX77827CEWC+T reliable?
The price and inventory of MAX77827CEWC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77827CEWC+T is usually 5 days.
3.What payment methods are accepted for MAX77827CEWC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77827CEWC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77827CEWC+T?
MAX77827CEWC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77827CEWC+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 MAX77827CEWC+T?
For technical support, including MAX77827CEWC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77827CEWC+T requirements.
6.How does Aetrix verify that MAX77827CEWC+T is sourced from the original manufacturer or authorized distributors?
All MAX77827CEWC+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 MAX77827CEWC+T meets industry standards.
7.What is the process for return or replacement of MAX77827CEWC+T?
All MAX77827CEWC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77827CEWC+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 MAX77827CEWC+T part is unused and in its original packaging.
Return procedure for MAX77827CEWC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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