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Analog Devices Inc./Maxim Integrated MAX1676EUB-T
- Part No.:
- MAX1676EUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1676EUB-T.pdf
- Description:
- IC REG BOOST ADJ 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,401
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Product details
Overview
MAX1676EUB-T from Maxim Integrated is a compact, high-efficiency, adjustable-current-limit step-up DC-DC converter in a 10-pin µMAX package. It operates from 0.7V input, delivers 2V–5.5V output, features internal synchronous rectification, 16µA quiescent current, and integrated low-battery detection (LBI/LBO). It is used in battery-powered handheld devices requiring ultra-low-power boost conversion with reduced EMI.
For engineers reviewing the MAX1676EUB-T datasheet, MAX1676EUB-T pinout, MAX1676EUB-T application, or MAX1676EUB-T equivalent, key selection criteria include its selectable 0.5A/1A current limit, anti-ringing damping switch, 10-pin µMAX footprint, and support for single-cell alkaline/NiMH start-up down to 0.9V - all critical for space-constrained, low-voltage portable designs.
Technical Context
The MAX1676EUB-T employs a minimum-off-time, current-limited PFM control scheme with no oscillator, enabling ultra-low quiescent current (16µA) while maintaining up to 94% efficiency at 200mA. Its dual-mode feedback (FB pin) supports preset 3.3V/5.0V outputs or resistor-adjustable regulation from 2V to 5.5V using a 1.30V internal reference.
Unlike the MAX1674/MAX1675, the MAX1676EUB-T uniquely integrates a BATT-connected damping switch (CLSEL-controlled) that suppresses LX ringing via an external 200Ω resistor - reducing EMI without affecting output ripple. Its 0.3Ω N-channel MOSFET power switch and internal synchronous rectifier eliminate external Schottky diode requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to VOUT; guaranteed start-up from 0.9V (enables single-cell Alkaline/NiMH operation) |
| Output Voltage Range | 2.0V to 5.5V; set via FB pin (GND=5V, OUT=3.3V) or resistor divider (supports custom rail generation) |
| Current Limit | Selectable 0.5A (CLSEL=GND) or 1.0A (CLSEL=OUT); enables trade-off between inductor size and max load capability |
| Quiescent Current | 16µA typical; minimizes battery drain in standby, critical for long-life portable applications |
| Efficiency | 94% at 200mA output (VIN=2.4V, VOUT=3.3V); achieved via synchronous rectification and low RDS(ON) (0.3Ω) |
| Shutdown Current | 0.1µA typical; ensures near-zero battery leakage during system sleep mode |
| Reference Voltage | 1.30V ±2.6mV (0°C to +85°C); stable precision reference for accurate output and LBI threshold setting |
Pinout & Package
The MAX1676EUB-T is housed in a 10-pin µMAX package (3mm × 3mm, 0.8mm height), thermally enhanced with exposed pad (not electrically connected). Pin 1 is marked by dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Power Output / Bootstrap Supply | Delivers regulated output; supplies IC bias current (bootstrapped operation); connects to CLSEL/SHDN for normal use |
| 2 LX | N/P-Channel MOSFET Drain | Switch node connecting to inductor; requires short PCB trace and optional damping resistor (BATT pin) to suppress ringing |
| 3 GND | Analog/Digital Ground | Common return for all internal circuits; must be soldered directly to ground plane for thermal and noise performance |
| 4 BATT | Damping Switch Terminal | Connects external 200Ω resistor to LX to dissipate inductor ring energy; unused → leave open |
| 5 CLSEL | Current Limit Select Input | Logic-level input: tie to OUT for 1A limit, GND for 0.5A limit; draws only 1.4µA when high |
| 6 LBO | Open-Drain Low-Battery Output | Sinks current when LBI < 1.30V; requires external pull-up (≥100kΩ to OUT); tolerates up to 6V pull-up voltage |
| 7 LBI | Low-Battery Input | Comparator input referenced to 1.30V; <50nA bias current allows high-value resistor dividers for flexible trip-point setting |
| 8 FB | Dual-Mode Feedback Input | Connect to GND (5V), OUT (3.3V), or resistor divider (2V–5.5V); sets output voltage with <50nA input current |
| 9 SHDN | Logic-Controlled Shutdown | Active-low enable: <0.2×VOUT = shutdown (0.1µA ISHDN); >0.8×VOUT = active; tolerant to 6V max |
| 10 REF | 1.30V Precision Reference Output | Stable 1.30V source (±2.6mV); bypass with 0.1µF capacitor; can supply ≤100µA to external circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable current limit (0.5A/1A) | Enables optimized inductor selection: smaller inductors for compact layouts (0.5A), higher output current capability (1A) |
| Integrated LX damping switch | Reduces EMI by suppressing inductor ringing without increasing output ripple; requires only one external 200Ω resistor |
| 16µA quiescent supply current | Extends battery life in always-on or infrequently active portable systems (e.g., medical sensors, RF tags) |
| Internal synchronous rectifier | Eliminates need for external Schottky diode - saves board area, cost, and conduction losses (vs. ~0.3V diode drop) |
| Low-battery detection (LBI/LBO) | On-chip comparator with 1.30V threshold and <50nA input bias - supports high-impedance, low-power battery monitoring |
Applications
| Wireless Handheld Devices | Medical Diagnostic Sensors |
|---|---|
Use Scenario: Powering RF transceivers and microcontrollers in compact Bluetooth headsets or Zigbee remotes operating from single NiMH cells. IC Role / Device Role: Step-up converter generating stable 3.3V rail from 0.9V–1.4V battery input; provides low-noise, low-quiescent power under dynamic load. Use Value: Enables reliable start-up below 1.1V and maintains >90% efficiency at 100mA, extending usable battery capacity by 25% vs. legacy boosters. |
Use Scenario: Supplying analog front-end and ADC in portable glucose meters or pulse oximeters powered by coin-cell batteries. IC Role / Device Role: Ultra-low-IQ boost regulator delivering precise 2.5V or 3.0V reference-sensitive rails with minimal self-heating. Use Value: 16µA quiescent current and 0.1µA shutdown current preserve battery shelf life >2 years; LBI/LBO enables accurate end-of-life warning. |
| RF Identification Tags | Hand-Held Industrial Scanners |
Use Scenario: Providing regulated 5.0V to UHF RFID reader ICs in battery-operated asset-tracking tags. IC Role / Device Role: High-efficiency boost converter with fast transient response, supporting pulsed 300mA peak loads during tag interrogation. Use Value: Selectable 1A current limit ensures stable 5V output during burst-mode operation; anti-ringing feature meets FCC Class B EMI limits. |
Use Scenario: Powering CMOS image sensors and laser drivers in rugged barcode scanners using 1.5V alkaline primary cells. IC Role / Device Role: Compact, robust boost IC with built-in low-battery detection and wide input range (0.7V–VOUT) for deep-discharge tolerance. Use Value: Start-up guaranteed from 0.9V eliminates brown-out resets; LBO output interfaces directly with host MCU GPIO for battery-status alerts. |
Availability
MAX1676EUB-T is available at Aetrix Electronics and suitable for wireless handsets, portable medical diagnostics, RFID readers, and industrial handheld scanners requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX1676EUB-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.
The MAX1674/MAX1675/MAX1676 family was designed specifically for ultra-low-power, space-constrained portable electronics - delivering high-efficiency boost conversion with integrated features like synchronous rectification, low-battery monitoring, and EMI-reducing damping.
FAQ
What is the minimum input voltage required for MAX1676EUB-T to start up?
The MAX1676EUB-T guarantees start-up from 0.9V input voltage under typical conditions. With an external Schottky diode (e.g., MBR0520) added between LX and OUT, start-up is supported down to 0.7V - essential for deeply discharged single-cell alkaline or NiMH batteries. This behavior is confirmed in the Absolute Maximum Ratings and Typical Operating Characteristics sections of the official datasheet.
How does the CLSEL pin affect MAX1676EUB-T performance?
The CLSEL pin on the MAX1676EUB-T selects the internal current limit: tying CLSEL to GND sets 0.5A (enabling smaller inductors), while tying it to OUT sets 1.0A (supporting higher output current). This selection directly impacts maximum steady-state output (e.g., 420mA at VOUT=3.3V with CLSEL=OUT), inductor sizing, and EMI profile - making it a key design flexibility feature unique to the MAX1676EUB-T within the family.
Can MAX1676EUB-T operate without an external Schottky diode?
Yes, the MAX1676EUB-T operates without an external Schottky diode thanks to its integrated synchronous rectifier - a P-channel MOSFET that replaces the diode and reduces conduction loss. However, for inputs below 1.1V (e.g., cold NiMH), adding an external Schottky (like MBR0520) between LX and OUT ensures reliable start-up, as documented in Note 1 of the Electrical Characteristics table.
What is the purpose of the BATT pin on MAX1676EUB-T?
The BATT pin on the MAX1676EUB-T connects to an internal damping switch used to suppress inductor ringing at the LX node. When enabled (via CLSEL configuration), it places an external resistor (typically 200Ω) across the inductor during energy decay, rapidly dissipating resonant energy and reducing EMI - a feature not present in MAX1674/MAX1675 and exclusive to the MAX1676EUB-T variant.
Does MAX1676EUB-T support adjustable output voltages outside 3.3V/5.0V presets?
Yes, the MAX1676EUB-T supports fully adjustable output voltages from 2.0V to 5.5V using a resistor divider from OUT to FB to GND. The FB pin has <50nA input bias current, allowing high-value resistors (R6 ≤260kΩ) to minimize loading. Output is set by R5 = R6 × ((VOUT / 1.30V) − 1), enabling precise rail generation for analog or mixed-signal subsystems.
MAX1676EUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V (3.3V, 5V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- -
- Frequency - Switching:
- Up to 500Hz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX
MAX1676EUB-T FAQ
1.How can I place an order for MAX1676EUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1676EUB-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 MAX1676EUB-T reliable?
The price and inventory of MAX1676EUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1676EUB-T is usually 5 days.
3.What payment methods are accepted for MAX1676EUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1676EUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1676EUB-T?
MAX1676EUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1676EUB-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 MAX1676EUB-T?
For technical support, including MAX1676EUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1676EUB-T requirements.
6.How does Aetrix verify that MAX1676EUB-T is sourced from the original manufacturer or authorized distributors?
All MAX1676EUB-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 MAX1676EUB-T meets industry standards.
7.What is the process for return or replacement of MAX1676EUB-T?
All MAX1676EUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1676EUB-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 MAX1676EUB-T part is unused and in its original packaging.
Return procedure for MAX1676EUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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