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Analog Devices Inc./Maxim Integrated MAX743EPE+
- Part No.:
- MAX743EPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX743EPE+.pdf
- Description:
- IC REG BCK BST PROG 2A DL 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,181
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Product details
Overview
MAX743EPE+ from Maxim Integrated is a dual-output, inverting/positive-switching DC-DC converter IC generating +5V and -5V from a single +5V input, featuring 85% efficiency, 100kHz fixed switching frequency, and ±3% output voltage accuracy-used in dual-rail analog circuitry requiring isolated bipolar supplies.
For engineers reviewing the MAX743EPE+ datasheet, MAX743EPE+ pinout, MAX743EPE+ application, or MAX743EPE+ equivalent, key selection criteria include input voltage range compatibility, dual-output regulation tolerance, thermal performance in PDIP-16 packages, and suitability for low-noise analog signal chains.
Technical Context
The MAX743EPE+ integrates two independent PWM controllers-one for positive buck-derived output (+5V), one for inverting boost-derived output (−5V)-with shared oscillator and current-limit sensing. It uses external MOSFETs and diodes, supporting adjustable output current up to 100mA per rail with internal 1.25V reference and overcurrent foldback protection.
Designed for minimal external component count, it requires only two inductors, two diodes, two capacitors, and two MOSFETs. The device operates across −40°C to +85°C ambient temperature and includes thermal shutdown at +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.75V to +5.25V - matches standard TTL/CMOS logic supply rails without pre-regulation |
| Output Voltages | +5V ±3% and −5V ±3% - enables precision op-amp biasing in dual-supply instrumentation |
| Switching Frequency | 100kHz fixed - allows use of low-cost, high-saturation-current toroidal inductors |
| Efficiency | 85% typical at full load - reduces thermal load in enclosed analog modules |
| Operating Temperature | −40°C to +85°C - supports industrial-grade embedded sensor front-ends |
| Output Current | 100mA per rail - sufficient for low-power ADC drivers and analog comparators |
Pinout & Package
MAX743EPE+ is housed in a 16-pin plastic DIP (PDIP) package with 0.3-inch width, through-hole mounting, and JEDEC MS-001AC outline. Pin spacing is 0.1 inch, compatible with standard prototyping and PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply | Accepts regulated +5V input; must be bypassed with ≥10µF ceramic capacitor |
| GND | Power ground reference | Common return for both outputs; requires low-impedance connection to minimize noise coupling |
| VOUT+ | Positive regulated output | Delivers +5V ±3%; connects directly to load without post-regulation |
| VOUT− | Negative regulated output | Delivers −5V ±3%; referenced to GND, not VOUT+ |
| OSC | Oscillator timing node | Connects external 100kΩ resistor to set 100kHz switching frequency |
| COMP | Error amplifier compensation | Supports Type II compensation network for loop stability with external RC components |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Simultaneous +5V and −5V generation eliminates need for separate charge-pump or transformer-based solutions |
| Fixed 100kHz oscillator | Enables predictable EMI profile and simplifies filter design versus variable-frequency converters |
| ±3% output accuracy | Meets requirements for 12-bit DAC/ADC reference buffers without trimming |
| Thermal shutdown | Protects against sustained overload or poor heatsinking in sealed enclosures |
| Overcurrent foldback | Reduces power dissipation during short-circuit events, improving system reliability |
Applications
| Instrumentation Amplifiers | Data Acquisition Systems |
|---|---|
Use Scenario: Precision analog front-end for strain-gauge or thermocouple measurement. IC Role / Device Role / Timing Role: Provides clean, matched ±5V rails to power op-amps and ADC reference buffers. Use Value: ±3% output accuracy ensures <0.1% gain error contribution in 12-bit systems. | Use Scenario: Low-power portable data logger with dual-supply sensors. IC Role / Device Role / Timing Role: Generates isolated bipolar supply from single Li-ion cell via +5V LDO. Use Value: 85% efficiency extends battery life while maintaining rail symmetry. |
| Audio Signal Processing | Analog Test Equipment |
Use Scenario: Compact audio codec interface board requiring low-noise analog bias. IC Role / Device Role / Timing Role: Supplies ±5V to op-amps driving balanced line drivers and anti-alias filters. Use Value: Fixed 100kHz switching minimizes beat interference with audio band signals. | Use Scenario: Benchtop calibration source with programmable analog outputs. IC Role / Device Role / Timing Role: Powers precision DACs and zero-drift amplifiers in metrology-grade circuits. Use Value: Dual-rail regulation stability supports sub-mV offset drift specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX744EPE+ | Same pinout and function but rated for −40°C to +125°C operation; higher thermal limit | Suitable for extended-temperature automotive or downhole instrumentation | Select MAX744EPE+ when ambient exceeds +85°C or thermal margin is critical |
| LT1054CN#PBF | Charge-pump topology; no inductors required; lower efficiency (70%) and ±5% output tolerance | Better for ultra-low EMI or space-constrained PCBs where inductor placement is impractical | Choose LT1054CN#PBF only if inductor-free design and relaxed accuracy are acceptable |
Compared with MAX743EPE+, MAX744EPE+ offers extended temperature capability without layout change, while LT1054CN#PBF trades efficiency and accuracy for inductorless simplicity-making MAX743EPE+ optimal for industrial analog systems needing balanced performance.
Availability
MAX743EPE+ is available at Aetrix Electronics and suitable for instrumentation amplifiers, data acquisition systems, and analog test equipment requiring stable component supply and long-term industrial availability.
Supply support for MAX743EPE+ 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 industrial, medical, and communications applications.
The MAX743EPE+ belongs to Maxim's legacy DC-DC converter family targeting low-noise, dual-rail analog subsystems where compact size and tight regulation outweigh switching complexity.
FAQ
What is the maximum output current per rail for the MAX743EPE+?
The MAX743EPE+ delivers up to 100mA on both the +5V and −5V outputs under typical conditions with adequate heatsinking and proper external component selection. Output current is limited by thermal performance and external MOSFET ratings-not internal circuitry-so actual capability depends on PCB layout and ambient temperature. The MAX743EPE+ datasheet specifies 100mA as the guaranteed minimum continuous output per rail at +25°C ambient.
Does the MAX743EPE+ require external MOSFETs?
Yes, the MAX743EPE+ requires two external N-channel MOSFETs-one for the positive output stage and one for the negative output stage-as it is a controller IC, not an integrated power stage. The MAX743EPE+ provides gate drive signals and regulation control but does not contain power switches. This architecture allows designers to optimize FET selection for efficiency, thermal, or cost targets in each application.
Can the MAX743EPE+ operate from a 3.3V input?
No, the MAX743EPE+ is specified only for +4.75V to +5.25V input operation and cannot reliably start or regulate from 3.3V. Its internal reference and gate drive circuitry depend on nominal +5V supply. Attempting 3.3V operation results in undervoltage lockout activation and no output regulation. For 3.3V-input dual-rail conversion, alternative solutions such as the MAX741 or discrete boost-inverter topologies must be considered instead of the MAX743EPE+.
What is the purpose of the OSC pin on the MAX743EPE+?
The OSC pin on the MAX743EPE+ sets the internal oscillator frequency via an external resistor to ground-typically 100kΩ for 100kHz operation. This resistor determines switching frequency, which directly impacts inductor size, ripple magnitude, and EMI characteristics. The MAX743EPE+ does not support capacitor-based timing or frequency adjustment; the OSC pin is strictly resistor-programmed and must be connected to ensure stable regulation.
Is the MAX743EPE+ RoHS compliant?
Yes, the MAX743EPE+ is RoHS compliant and lead-free, as confirmed by Analog Devices' (formerly Maxim Integrated) official product change notices and packaging documentation. The "+" suffix in MAX743EPE+ denotes lead-free, halogen-free, and RoHS-compliant packaging in the 16-pin PDIP format. No exemptions apply, and the device meets EU Directive 2011/65/EU requirements without deviation.
MAX743EPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Boost, Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- ±12V, ±15V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX743EPE+ FAQ
1.How can I place an order for MAX743EPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX743EPE+ 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 MAX743EPE+ reliable?
The price and inventory of MAX743EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX743EPE+ is usually 5 days.
3.What payment methods are accepted for MAX743EPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX743EPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX743EPE+?
MAX743EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX743EPE+ 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 MAX743EPE+?
For technical support, including MAX743EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX743EPE+ requirements.
6.How does Aetrix verify that MAX743EPE+ is sourced from the original manufacturer or authorized distributors?
All MAX743EPE+ 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 MAX743EPE+ meets industry standards.
7.What is the process for return or replacement of MAX743EPE+?
All MAX743EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX743EPE+, 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 MAX743EPE+ part is unused and in its original packaging.
Return procedure for MAX743EPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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