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Analog Devices Inc./Maxim Integrated MAX77827BEWC+
- Part No.:
- MAX77827BEWC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFBGA, WLBGA
- Datasheet:
-
MAX77827BEWC+.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.8A 12WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,576
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Product details
Overview
MAX77827BEWC+ from Maxim Integrated is a high-efficiency, ultra-low-quiescent-current buck-boost DC/DC converter optimized for single-cell Li-ion battery systems. It delivers 2.3V–5.3V adjustable output with 1.8A switching current limit, 6μA typical IQ, 96% peak efficiency at 3.3V in/out, and seamless buck-boost mode transition-enabling stable rail generation in space-constrained wearables and IoT endpoints.
For engineers reviewing the MAX77827BEWC+ datasheet, MAX77827BEWC+ pinout, MAX77827BEWC+ application, or MAX77827BEWC+ equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for portable power design.
Technical Context
The MAX77827BEWC+ implements a four-switch H-bridge buck-boost topology operating at 2.25–2.75MHz fixed-frequency PWM with current-mode control, enabling compact 1μH inductor use and minimal solution size (14.52mm²). Its dual ILIM configuration (1.8A typ) supports up to 1.0A buck-mode and 900mA boost-mode output under 3.0VIN/3.3VOUT conditions.
It integrates soft-start (1.5ms typ), active output discharge (100Ω internal switch), UVLO (1.75V rising threshold), thermal shutdown (+165°C), and overcurrent protection with 3ms fault detection and 12ms retry cycle-ensuring robust operation across -40°C to +125°C junction temperature range.
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–4.2V) plus USB/adapter input without external LDO. |
| Output Voltage Range | 2.3V to 5.3V - resistor-programmable via SEL pin; enables direct supply to 2.5V/3.3V/4.2V system rails. |
| Switching Current Limit | 1.8A (typ) - defines maximum inductor peak current; determines max 1.0A buck / 900mA boost load capability at 3.3V. |
| Quiescent Current | 6μA (typ at +25°C) - minimizes battery drain during sleep/idle, critical for multi-year IoT sensor node battery life. |
| Peak Efficiency | 96% at 3.3VIN/3.3VOUT - reduces thermal stress and extends runtime in thermally constrained wearable enclosures. |
| Switching Frequency | 2.5MHz (nominal) - allows use of small 1μH inductors and low-ESR ceramic capacitors, shrinking total BOM footprint. |
| Protection Features | UVLO, soft-start, active discharge, OCP, thermal shutdown - eliminates need for external supervision circuitry in end equipment. |
Pinout & Package
MAX77827BEWC+ uses the 12-bump wafer-level package (WLP), 1.61mm × 2.01mm, 0.4mm pitch, with bottom-side bumps. This ultra-compact WLP enables minimal PCB area usage and optimal thermal performance in thin-profile portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Battery or adapter input; requires 10μF ceramic bypass to PGND near pin for stability and EMI suppression. |
| OUT | Power Output | Regulated output rail; requires 22μF ceramic capacitor to PGND for transient response and ripple control. |
| LX1 / LX2 | Switching Nodes | Connect to opposite ends of single 1μH inductor; high di/dt paths requiring tight loop layout and ground stitching. |
| SEL | Analog Voltage Set | Resistor divider from OUT to AGND sets VOUT; value selects target voltage per Table 2 (e.g., open = 3.3V). |
| FPWM | Digital Control Input | Logic-high forces continuous 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 system power-good signaling. |
| EN | Digital Enable Input | Active-high enable; logic-low disables regulator and activates internal 100Ω active-discharge path to PGND. |
| BIAS | Analog Bias Supply | Internal LDO output; must be bypassed with 1μF ceramic to PGND for reference stability and noise immunity. |
| AGND / PGND | Ground Returns | Separate analog and power grounds reduce noise coupling; must be joined at single point near IC or via thermal pad. |
| OUTS | Output Sense | Remote sensing input; connects directly to load to compensate for PCB trace IR drop in precision applications. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Quiescent Current | 6μA typical enables >10-year battery life in always-on LPWAN sensors powered by coin cells or small Li-ion. |
| Seamless Buck-Boost Transition | H-bridge control algorithm avoids output glitches during VIN crossing VOUT-critical for uninterrupted MCU operation. |
| Single Resistor Output Programming | SEL pin eliminates DAC or I²C interface; simplifies BOM and firmware while supporting 2.3V–5.3V in 0.1V steps. |
| Integrated Active Output Discharge | 100Ω internal switch discharges VOUT within milliseconds after disable-prevents residual voltage from interfering with system reset. |
| 2.5MHz Fixed-Frequency PWM | Enables use of miniature 1μH inductors and 0603/0805 MLCCs-reducing solution size to 14.52mm² including passives. |
Applications
| Smart Wearables | LPWAN Endpoints |
|---|---|
Use Scenario: Compact fitness tracker with BLE radio, accelerometer, and OLED display powered by 120mAh Li-ion cell. IC Role / Device Role / Timing Role: Primary system power rail generator delivering regulated 3.3V from 2.8V–4.2V battery, maintaining voltage during RF transmit bursts. Use Value: 96% efficiency and 6μA IQ extend battery life to 7+ days between charges; 14.52mm² solution fits sub-20mm² PCB area budget. | Use Scenario: NB-IoT soil moisture sensor deployed in remote fields, transmitting hourly via cellular uplink on primary alkaline AA cells. IC Role / Device Role / Timing Role: Single-stage buck-boost supplying 3.0V to MCU and transceiver across full 0.9V–1.6V per-cell alkaline range (2-cell stack). Use Value: 1.8V minimum input supports deep discharge; 1.8A ILIM handles 300mA LTE peak transmit current without dropout. |
| Smartphone Peripherals | Industrial Handhelds |
Use Scenario: USB-C powered wireless charging receiver module integrated into smartphone accessory dock. IC Role / Device Role / Timing Role: Input-flexible DC/DC converting 5V USB-C source to 4.2V for Li-ion charging path or 3.3V for logic subsystem. Use Value: 5.5V absolute max input withstands USB-C voltage spikes; FPWM mode ensures low-noise 3.3V rail for sensitive RF receivers. | Use Scenario: Ruggedized barcode scanner with cold-temperature operation requirement (-20°C) and 24/7 duty cycle. IC Role / Device Role / Timing Role: Main power IC delivering 2.5V to FPGA core and 3.3V to interface logic from 3.6V Li-SOCl₂ primary battery. Use Value: -40°C to +125°C rated operation ensures reliability; thermal shutdown prevents damage during extended high-current scanning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | 2.5V–5.5V input; 1.2A ILIM; 11μA IQ; 2.4MHz switching; no POK or active discharge | Lacks power-good indicator and active discharge-requires external circuitry for safe shutdown sequencing | Preferred where cost sensitivity outweighs feature completeness and board space is less constrained |
| NCP1529MUTBG | 2.5V–5.5V input; 1.0A ILIM; 25μA IQ; 2.0MHz switching; no SEL programming or FPWM control | Fixed-output variants only; no resistor-adjustable VOUT or forced-PWM mode-limits system flexibility | Suitable for simple, fixed-voltage applications where lowest BOM count is priority over programmability |
Compared with TPS63020DSJR and NCP1529MUTBG, the MAX77827BEWC+ offers superior light-load efficiency (6μA vs. ≥11μA), integrated POK and active discharge, and resistor-based output flexibility-making it optimal for battery-critical, space-constrained, and feature-rich portable designs.
Availability
MAX77827BEWC+ is available at Aetrix Electronics and suitable for smart wearables, LPWAN endpoints, and industrial handhelds requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77827BEWC+ 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, high-density portable power conversion-specifically engineered to replace multi-rail solutions in battery-powered wearables, IoT sensors, and compact peripherals.
FAQ
What is the switching current limit for MAX77827BEWC+?
The MAX77827BEWC+ has a nominal switching current limit of 1.8A, as confirmed in Table 1 of the datasheet for "B" and "D" option parts. This defines the peak inductor current during operation and directly determines maximum sustainable output current-1.0A in buck mode and 900mA in boost mode at 3.0VIN/3.3VOUT. The MAX77827BEWC+ does not support the 3.1A ILIM option found in "A" and "C" variants.
Does MAX77827BEWC+ support remote output voltage sensing?
Yes, the MAX77827BEWC+ includes an OUTS (output sense) pin that enables Kelvin connection to the load for accurate regulation under varying PCB trace resistance. When used, OUTS feeds back to the error amplifier, compensating for IR drop between the IC's OUT pin and the actual load point-critical for precision rails in high-current or long-trace applications.
How does the soft-start time differ for MAX77827BEWC+ compared to other MAX77827 variants?
The MAX77827BEWC+ has a typical soft-start time of 1.5ms, as specified for "B" and "D" options in the datasheet's Table 1 and Detailed Description section. This is significantly longer than the 200µs soft-start of "A" and "C" variants, providing gentler inrush current limiting-ideal for systems with large output capacitance or sensitive upstream power sources.
What is the UVLO threshold for MAX77827BEWC+?
The MAX77827BEWC+ features a SYS undervoltage-lockout with a rising threshold of 1.75V (typical) and falling threshold of 1.68V (typical), per the Electrical Characteristics table. These values apply specifically to "B" and "D" options like the MAX77827BEWC+, ensuring reliable disablement before Li-ion cell voltage drops below safe operating levels.
Can MAX77827BEWC+ operate with a 1μH inductor?
Yes, the MAX77827BEWC+ is explicitly optimized for 1μH inductors, as stated in the Applications Information section and validated in Typical Operating Characteristics plots. Recommended parts include Samsung CIGT201610EH1R0MNE and Murata DFE18SBN1R0ME0-both rated for ≥3.1A saturation current to safely handle the 1.8A ILIM of the MAX77827BEWC+.
MAX77827BEWC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFBGA, WLBGA
- Packaging:
- Strip
- 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)
MAX77827BEWC+ FAQ
1.How can I place an order for MAX77827BEWC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77827BEWC+ 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 MAX77827BEWC+ reliable?
The price and inventory of MAX77827BEWC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77827BEWC+ is usually 5 days.
3.What payment methods are accepted for MAX77827BEWC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77827BEWC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77827BEWC+?
MAX77827BEWC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77827BEWC+ 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 MAX77827BEWC+?
For technical support, including MAX77827BEWC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77827BEWC+ requirements.
6.How does Aetrix verify that MAX77827BEWC+ is sourced from the original manufacturer or authorized distributors?
All MAX77827BEWC+ 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 MAX77827BEWC+ meets industry standards.
7.What is the process for return or replacement of MAX77827BEWC+?
All MAX77827BEWC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77827BEWC+, 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 MAX77827BEWC+ part is unused and in its original packaging.
Return procedure for MAX77827BEWC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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