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Analog Devices Inc./Maxim Integrated MAX758AEWE+
- Part No.:
- MAX758AEWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX758AEWE+.pdf
- Description:
- IC REG BUCK ADJ 750MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,847
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Product details
Overview
MAX758AEWE+ from Maxim Integrated is an adjustable-output, current-mode PWM step-down DC-DC switching regulator in a 16-pin wide SO package. It accepts 4V–16V input, delivers up to 750mA output current, operates at 160kHz fixed frequency, achieves 85%–90% efficiency, and features ±4.5% output voltage accuracy over line/load/temperature for use in portable instrumentation power rails.
For engineers reviewing the MAX758AEWE+ datasheet, MAX758AEWE+ pinout, MAX758AEWE+ application, or MAX758AEWE+ equivalent, key selection criteria include input voltage range (4V–16V), load capability (750mA), shutdown current (6µA), soft-start programmability, and undervoltage lockout thresholds (3.75V rising / 3.50V falling).
Technical Context
The MAX758AEWE+ implements a current-mode PWM control architecture with dual feedback loops: an inner current-sense loop enabling cycle-by-cycle current limiting and an outer voltage-error loop regulating output via external resistor divider on the CC pin. Its internal 1.22V bandgap reference supplies up to 100µA and interfaces directly with the feedback network.
It integrates protection features including undervoltage lockout (UVLO), soft-start (SS pin with external capacitor), overcurrent detection (~1.5A trip), and shutdown control (SHDN active-low). The LX pin drives an internal P-channel MOSFET switch, supporting continuous or discontinuous conduction modes depending on inductor value, input/output voltages, and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0V to 16.0V - supports wide-input battery and unregulated supply systems without pre-regulation. |
| Output Current | Up to 750mA - sufficient for powering microcontrollers, sensors, and analog circuitry in portable equipment. |
| Switching Frequency | 160kHz - enables use of compact 33µH or 100µH inductors and simplifies EMI filtering. |
| Efficiency | 85% to 90% - minimizes thermal stress and extends battery life in portable applications. |
| Shutdown Current | 6µA typical - ensures ultra-low quiescent drain during system sleep or standby modes. |
| Output Voltage Accuracy | ±4.5% plus external resistor tolerance - enables stable regulation across temperature and load variations. |
| Reference Voltage | 1.22V (typ) - sets feedback threshold for precise output adjustment from 1.25V to VIN. |
Pinout & Package
MAX758AEWE+ is housed in a 16-pin wide SO (small-outline) package with dimensions 10.16mm × 7.11mm × 2.35mm (max height), gull-wing leads, and exposed pad not connected internally. Pin 1 marked by notch or dot; pin numbering follows standard SO convention counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Supply Input | Primary power input (4V–16V); requires local 1µF ceramic + bulk electrolytic bypassing near pins 1 & 2. |
| LX | Switch Node | Drain of internal P-channel MOSFET; connects to inductor and catch diode anode; handles high dv/dt switching. |
| GND | Power Ground | Common return for power paths and internal circuits; must connect to low-impedance ground plane. |
| I.C. | Internal Connection | No external connection; internally tied to substrate (V+); leave floating per datasheet. |
| CC | Feedback Compensation | Inverting input of error amplifier; connects to external voltage divider and 330pF compensation capacitor. |
| SS | Soft-Start Control | Controls startup ramp rate and current limit threshold via external capacitor (e.g., 0.1µF) to GND. |
| REF | Reference Output | 1.22V bandgap reference output; supplies ≤100µA; bypass with 0.01µF capacitor to GND. |
| SHDN | Shutdown Input | Active-low enable; pull to GND to disable regulator and reduce supply current to 6µA. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | 1.25V to VIN via external resistor divider on CC pin - eliminates need for multiple fixed-output variants. |
| Programmable Soft-Start | Capacitor on SS pin sets controlled output ramp time and prevents inrush current - avoids system brownouts. |
| Cycle-by-Cycle Current Limiting | Monitors switch current each cycle to clamp peak inductor current - ensures safe operation under overload. |
| Undervoltage Lockout (UVLO) | Enables operation only above 3.75V (rising) and disables below 3.50V (falling) - protects against weak-battery faults. |
| Low Shutdown Supply Current | 6µA typical - enables long-term battery-backed retention without significant drain. |
Applications
| Portable Instrumentation Power | Computer Peripheral Regulation |
|---|---|
|
Use Scenario: Powering handheld multimeters, data loggers, and portable oscilloscopes with single-cell Li-ion or multi-cell alkaline inputs. IC Role / Device Role / Timing Role: Primary step-down regulator converting 9V–16V battery or adapter input to stable 3.3V or 5V logic/analog rail. Use Value: Delivers 750mA at >85% efficiency with minimal external components - reduces board space and thermal management burden. |
Use Scenario: Providing regulated 5V supply to USB hubs, card readers, and external storage enclosures. IC Role / Device Role / Timing Role: Adjustable buck converter handling variable input from wall adapters (5V–16V) while maintaining tight output regulation. Use Value: Fixed 160kHz switching enables predictable EMI profile and simple LC filter design for noise-sensitive digital interfaces. |
| Cellular Radio Baseband | Industrial Sensor Node Supply |
|
Use Scenario: Generating clean 2.8V or 3.3V supply for RF transceiver baseband ICs in 2G/3G modules. IC Role / Device Role / Timing Role: High-efficiency DC-DC regulator operating from noisy battery or PMIC outputs with fast transient response. Use Value: Current-mode control provides excellent load transient response (<50ms recovery) critical for burst-mode radio operation. |
Use Scenario: Powering low-power microcontrollers and analog front-ends in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Wide-temp (-40°C to +85°C) buck regulator accepting 4V–16V industrial input with UVLO and shutdown. Use Value: 6µA shutdown current and -40°C to +85°C rating ensure reliable operation in unheated outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678-5.0/NOPB | Fixed 5V output; 5A capability; 63kHz switching; requires external MOSFET; no integrated soft-start capacitor control. | Best suited for higher-current, fixed-voltage applications where layout space allows larger inductors and external FET. | Select when fixed 5V output suffices and higher load current (>750mA) is required; avoid if adjustable output or low-noise 160kHz operation is needed. |
| TPS54331DR | 3A output; 570kHz switching; integrated high-side FET; requires external compensation; 4.5V–28V input. | Targets higher-efficiency, higher-frequency designs with tighter ripple specs and smaller magnetics. | Choose for designs needing >1A output or wider input range (up to 28V); not suitable for low-quiescent or soft-start-timed applications like MAX758AEWE+. |
Compared with LM2678-5.0/NOPB and TPS54331DR, the MAX758AEWE+ offers unique value in adjustable output, programmable soft-start timing, ultra-low 6µA shutdown current, and guaranteed 750mA performance within a narrow 4V–16V input window - making it optimal for space-constrained, battery-sensitive portable instrumentation.
Availability
MAX758AEWE+ is available at Aetrix Electronics and suitable for portable instrumentation power, computer peripheral regulation, and industrial sensor node supply requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX758AEWE+ 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, communications, and consumer applications.
The MAX758AEWE+ belongs to Maxim's legacy high-efficiency current-mode buck regulator family, designed specifically for portable and battery-powered systems demanding low quiescent current, wide input range, and robust protection features.
FAQ
What is the maximum output current supported by the MAX758AEWE+?
The MAX758AEWE+ delivers up to 750mA of continuous output current when operating within its specified input voltage range (4V–16V) and thermal limits. This rating is validated using a 100µH inductor and applies across the full -40°C to +85°C temperature range. Peak inductor current reaches ~1.5A under heavy loads, triggering cycle-by-cycle limiting to protect the internal switch.
Does the MAX758AEWE+ require an external MOSFET?
No, the MAX758AEWE+ integrates a P-channel power MOSFET switch on-die - the LX pin connects directly to the drain terminal. No external high-side or low-side FET is needed. Users only require an external Schottky catch diode (e.g., 1N5817), inductor, input/output capacitors, and feedback resistors to complete the buck converter.
How is output voltage adjusted on the MAX758AEWE+?
Output voltage is set using a two-resistor voltage divider from VOUT to GND, with the junction connected to the CC pin. The internal 1.22V reference determines the ratio: VOUT = 1.22V × (1 + R2/R3). For example, R3 = 13.0kΩ and R2 = 40.2kΩ yields 5.00V. Output tolerance is ±4.5% over temperature plus external resistor tolerances.
What is the purpose of the SS pin on the MAX758AEWE+?
The SS (Soft-Start) pin controls startup behavior and short-circuit protection. Connecting a capacitor (e.g., 0.1µF) from SS to GND ramps the internal current-limit threshold, preventing inrush current and output overshoot. During overcurrent or UVLO faults, the SS capacitor discharges to initiate automatic recovery. A 510kΩ resistor from SS to SHDN adds current boost for >1A loads.
What package type is used for the MAX758AEWE+?
The MAX758AEWE+ uses a 16-pin wide SO (small-outline) package with gull-wing leads, measuring 10.16mm × 7.11mm × 2.35mm max height. It is rated for -40°C to +85°C operation and features pin 1 identification via notch or dot. This package provides better thermal performance and higher pin density than the 8-pin DIP/SO variants of the same family.
MAX758AEWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 750mA
- Frequency - Switching:
- 160kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX758AEWE+ FAQ
1.How can I place an order for MAX758AEWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX758AEWE+ 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 MAX758AEWE+ reliable?
The price and inventory of MAX758AEWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX758AEWE+ is usually 5 days.
3.What payment methods are accepted for MAX758AEWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX758AEWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX758AEWE+?
MAX758AEWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX758AEWE+ 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 MAX758AEWE+?
For technical support, including MAX758AEWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX758AEWE+ requirements.
6.How does Aetrix verify that MAX758AEWE+ is sourced from the original manufacturer or authorized distributors?
All MAX758AEWE+ 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 MAX758AEWE+ meets industry standards.
7.What is the process for return or replacement of MAX758AEWE+?
All MAX758AEWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX758AEWE+, 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 MAX758AEWE+ part is unused and in its original packaging.
Return procedure for MAX758AEWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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