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Analog Devices Inc./Maxim Integrated MAX18000AWT+
- Part No.:
- MAX18000AWT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFBGA, WLBGA
- Datasheet:
-
MAX18000AWT+.pdf
- Description:
- IC REG BOOST ADJ 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,821
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Product details
Overview
MAX18000AWT+ from Analog Devices is a nanoPower synchronous boost converter IC designed for ultra-low-power battery-powered systems. It operates from 0.5V to 5.5V input, delivers 2.5V–5.5V output (set via single RSEL resistor), features 512nA quiescent current, 3.6A cycle-by-cycle current limit, and True Shutdown™ with 7nA shutdown current - enabling multi-year operation in wearables and IoT sensors.
For engineers reviewing the MAX18000AWT+ datasheet, MAX18000AWT+ pinout, MAX18000AWT+ application, or MAX18000AWT+ equivalent, key selection considerations include its 1.07mm × 1.57mm WLP package, adaptive on-time current-mode control, nanoPower/skip/CCM mode transitions, short-circuit protection (700mA limit), and thermal shutdown at +165°C.
Technical Context
The MAX18000AWT+ uses adaptive on-time current-mode control to achieve fast transient response and high efficiency across load ranges. Its three operating modes - nanoPower (≤28kHz, error amp disabled), skip, and CCM - are automatically selected based on load current to maintain ≥90% efficiency down to 20µA.
It integrates high-side (60–90mΩ) and low-side (30–60mΩ) MOSFETs, supports soft-start with PMOS linear slew (350µs) followed by boost-slew (3V/ms), and implements active discharge (100Ω) and reverse-blocking during True Shutdown™ to eliminate forward/reverse leakage between IN and OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.5V to 5.5V - enables direct harvesting from weak energy sources (e.g., thermoelectric, photovoltaic) and operation down to near-dead battery cells. |
| Output Voltage Range | 2.5V to 5.5V in 100mV steps - set precisely via single external 1% RSEL resistor (e.g., 191kΩ for 3.3V), eliminating feedback divider losses. |
| Quiescent Current | 512nA into OUT - sustains >10-year battery life in always-on sensor nodes drawing <1µA average load. |
| Switching Current Limit | 3.6A peak - protects internal MOSFETs and external inductor during startup, overload, or short-circuit events. |
| Short-Circuit Protection | 700mA current limit when VOUT < 0.5V - prevents thermal runaway and enables automatic recovery upon fault removal. |
| Shutdown Current | 7nA - ensures zero-load battery drain during system sleep, critical for long-term storage or intermittent wake-up systems. |
| Package | 1.07mm × 1.57mm, 0.5mm pitch, 6-bump WLP - provides minimal footprint for space-constrained wearables and medical patches. |
Pinout & Package
MAX18000AWT+ is housed in a 1.07mm × 1.57mm, 0.5mm pitch, 6-bump wafer-level package (WLP) with bottom-side solder bumps. The package is optimized for minimal PCB area and thermal resistance (θJA = 81.03°C/W on four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Switching node | Connects to inductor; carries high di/dt current; requires short, wide trace routing to minimize parasitic inductance and voltage spikes. |
| IN | Main power input | Accepts 0.5V–5.5V source; must be decoupled with ≥22µF X5R ceramic capacitor placed adjacent to pin to suppress ripple and inrush transients. |
| EN | Digital enable input | Logic-high (>1.2V) enables regulation; logic-low (<0.4V) activates True Shutdown™ with output disconnect and 7nA IQ. |
| OUT | Regulated output | Delivers 2.5V–5.5V; requires 2×22µF X5R ceramic capacitors placed directly at pin to ensure stability and transient response. |
| GND | Power ground | Low-impedance return path for IN, OUT, and LX currents; must connect to solid ground plane via multiple vias under package. |
| RSEL | Analog voltage select | Resistor-to-GND sets output voltage (e.g., 191kΩ → 3.3V); total capacitance must be <2pF to ensure accurate ADC reading within 1320µs. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ mode | Physically disconnects IN from OUT with no forward or reverse current path, enabling zero-load battery isolation and safe hot-plug operation. |
| NanoPower regulation | Automatically disables error amplifier and internal bias circuits below ~28kHz switching frequency, reducing IQ to 512nA while maintaining ±1% output accuracy. |
| Single-resistor output programming | Replaces traditional resistive feedback dividers with one 1% RSEL resistor - cuts BOM cost, saves PCB area, eliminates divider power loss, and simplifies inventory management. |
| Adaptive on-time control | Adjusts switch on-time dynamically based on VIN and VOUT to maintain stable regulation across input/output combinations without external compensation. |
| Integrated active discharge | 100Ω internal FET discharges OUT to GND when EN is low - prevents floating output voltage and ensures predictable system reset behavior. |
Applications
| Wearable Health Monitors | IoT Edge Sensors |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing in coin-cell-powered wristbands with multi-week battery life. IC Role / Device Role / Timing Role: NanoPower boost regulator supplying stable 3.3V to analog front-end and BLE SoC from declining 1.2–2.8V battery. Use Value: 512nA IQ extends runtime beyond 12 months; True Shutdown™ enables zero-drain deep sleep between sensor readings. |
Use Scenario: Battery-operated environmental sensor node (temp/humidity/pressure) transmitting data every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Primary power rail generator converting 1.8V–3.6V primary cell output to regulated 3.3V for MCU and radio. Use Value: 90%+ efficiency at 20µA load preserves battery capacity during 99% idle time; short-circuit protection safeguards against faulty sensor wiring. |
| Smart Meter Tamper Detection | Implantable Medical Patches |
|
Use Scenario: Backup power supply for tamper-detection circuitry in utility meters, activated only during AC mains failure. IC Role / Device Role / Timing Role: Standby boost converter held in True Shutdown™ until triggered by power-loss signal, then rapidly starts up to 3.3V. Use Value: 7nA shutdown current prevents backup battery depletion over 10+ years; 350µs linear soft-start avoids inrush-induced false tamper alerts. |
Use Scenario: Miniaturized diagnostic patch monitoring tissue oxygenation for 72-hour clinical use on lithium coin cell. IC Role / Device Role / Timing Role: Ultra-small-area power manager delivering precise 2.5V to optical sensor array and low-power ADC. Use Value: 1.07mm × 1.57mm WLP fits sub-1cm² form factor; thermal shutdown (+165°C) prevents overheating during skin-contact operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanoPower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61291DRVR | Higher IQ (800nA), fixed 3.3V/5V outputs only, no RSEL programming; 2.5V min VIN, 5.5V max VOUT. | Lacks adjustable output and true nanoPower mode below 28kHz; suited for simpler fixed-voltage designs where resistor trimming is unnecessary. | Select when fixed output and lower design complexity outweigh need for programmability and lowest possible IQ. |
| LTC3525EDC-3.3#TRMPBF | Fixed 3.3V output, 20µA IQ (not nanoPower), 400mA switch current limit, 6-pin DFN package (2mm × 2mm). | Cannot support sub-100µA loads efficiently; unsuitable for multi-year battery life; larger footprint limits ultra-miniature use cases. | Choose only for cost-sensitive, medium-current applications where 20µA IQ is acceptable and space constraints are less severe. |
Compared with TPS61291DRVR and LTC3525EDC-3.3#TRMPBF, the MAX18000AWT+ uniquely combines 512nA IQ, single-resistor programmability, True Shutdown™ with output disconnect, and 3.6A current capability in a sub-1.6mm² WLP - making it the only option meeting stringent requirements for decade-long wearable and implantable power management.
Availability
MAX18000AWT+ is available at Aetrix Electronics and suitable for wearable health monitors, IoT edge sensors, and smart meter tamper detection requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX18000AWT+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.
The MAX18000AWT+ belongs to Analog Devices' nanoPower DC-DC converter product line, engineered specifically for ultra-low-quiescent-current power management in energy-harvesting and battery-constrained applications where longevity and miniaturization are critical.
FAQ
What is the minimum input voltage required for MAX18000AWT+ to start switching?
The MAX18000AWT+ requires a minimum startup voltage of 1.8V (typical), as specified by its input UVLO threshold (1.7–1.75V falling, 1.75–1.85V rising). Below this, the device remains in undervoltage lockout and will not initiate soft-start, even if the EN pin is asserted high. Once started, it can operate down to 0.5V input.
How does the RSEL resistor selection affect MAX18000AWT+ output accuracy?
The MAX18000AWT+ uses an internal ADC to read the RSEL resistor value, and output voltage accuracy depends on resistor tolerance. A ±1% resistor ensures ±1% output voltage accuracy (e.g., 191kΩ ±1% yields 3.3V ±33mV). Using a 5% resistor introduces additional error beyond the datasheet's ±1% regulation spec.
Does MAX18000AWT+ support automatic recovery after short-circuit fault removal?
Yes. When VOUT drops below 0.5V, the MAX18000AWT+ enters short-circuit protection mode, limiting current to 700mA (typical) and halting switching. Upon fault removal, it automatically resumes operation: first entering PMOS linear slew until VOUT ≈ VIN, then transitioning directly to boost mode - no manual reset or EN toggle required.
What is the maximum recommended inductor value for MAX18000AWT+ when targeting 5V output?
For 5V output, the MAX18000AWT+ datasheet recommends a 470nH inductor (e.g., Murata DFE201612E-R47M) with ≥5.5A saturation current and ≤26mΩ DCR. Larger inductance increases peak current stress and reduces efficiency; smaller values risk exceeding the 3.6A current limit under heavy load or low VIN conditions.
Can MAX18000AWT+ operate with input and output voltages equal (VIN = VOUT)?
No. The MAX18000AWT+ is a boost-only converter and requires VIN to be at least 200mV below VOUT to operate in boost mode (per datasheet Note 3). If VIN ≥ VOUT, regulation fails and the device cannot sustain output - it is not a buck-boost or pass-through regulator.
MAX18000AWT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- -
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.07x1.57)
MAX18000AWT+ FAQ
1.How can I place an order for MAX18000AWT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX18000AWT+ 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 MAX18000AWT+ reliable?
The price and inventory of MAX18000AWT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX18000AWT+ is usually 5 days.
3.What payment methods are accepted for MAX18000AWT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX18000AWT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX18000AWT+?
MAX18000AWT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX18000AWT+ 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 MAX18000AWT+?
For technical support, including MAX18000AWT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX18000AWT+ requirements.
6.How does Aetrix verify that MAX18000AWT+ is sourced from the original manufacturer or authorized distributors?
All MAX18000AWT+ 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 MAX18000AWT+ meets industry standards.
7.What is the process for return or replacement of MAX18000AWT+?
All MAX18000AWT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX18000AWT+, 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 MAX18000AWT+ part is unused and in its original packaging.
Return procedure for MAX18000AWT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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