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Analog Devices Inc./Maxim Integrated MAX743CWE+T
- Part No.:
- MAX743CWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX743CWE+T.pdf
- Description:
- IC REG BCK BST PROG 2A DL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
MAX743CWE+T from Maxim Integrated is a dual-output, high-efficiency DC-DC switching regulator IC generating +5V and -5V outputs from a single +5V input. It integrates two PWM controllers, internal power switches, and feedback circuitry in a 16-pin SOIC package. Typical use includes powering op-amp dual-rail analog circuits in industrial instrumentation.
For engineers reviewing the MAX743CWE+T datasheet, MAX743CWE+T pinout, MAX743CWE+T application, or MAX743CWE+T equivalent, key selection factors include input voltage range, output current capability, switching frequency, thermal performance in SOIC-16, and regulation accuracy under load transients.
Technical Context
The MAX743CWE+T employs two independent current-mode PWM controllers-one for the buck-derived +5V output and one for the inverting −5V output-enabling simultaneous regulation with shared oscillator synchronization. Internal 0.3Ω N-channel MOSFETs drive external inductors and diodes, eliminating need for external high-side switches.
It features undervoltage lockout (UVLO) at 4.2V, thermal shutdown at +150°C, and ±1.5% initial output voltage accuracy over temperature and line/load variations. The fixed 200kHz switching frequency balances efficiency and EMI filtering requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 5.5V - supports standard +5V logic rail without external pre-regulation |
| +5V Output Current | 200mA - sufficient for low-power analog signal chains and sensor interfaces |
| -5V Output Current | 100mA - enables biasing of dual-supply op-amps and ADC reference buffers |
| Switching Frequency | 200kHz - allows use of compact, low-ESR ceramic output capacitors and standard inductors |
| Output Voltage Accuracy | ±1.5% - ensures stable reference and analog front-end operation across temperature |
| Thermal Shutdown Threshold | +150°C - protects device during sustained overload or poor PCB heat sinking |
Pinout & Package
MAX743CWE+T is housed in a 16-pin wide-body SOIC (SOIC-W) package with 0.3-inch body width and 0.050-inch lead pitch. Thermal pad is not present; power dissipation relies on copper pour and trace width design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply | Accepts +4.5V to +5.5V; must be bypassed with ≥10µF ceramic capacitor |
| GND | Power and signal ground reference | Common return for both regulators; requires low-impedance connection to power plane |
| +VOUT | +5V regulated output | Delivers up to 200mA; requires local 10µF ceramic output capacitor |
| −VOUT | −5V regulated output | Delivers up to 100mA; requires separate 10µF ceramic output capacitor |
| OSC | Oscillator timing node | Connects external 100kΩ resistor to set 200kHz switching frequency |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous PWM controllers | Enables coordinated +5V/−5V generation without external clock synchronization circuitry |
| Integrated 0.3Ω N-channel MOSFETs | Eliminates need for external high-side switches, reducing BOM count and layout area |
| Undervoltage lockout (UVLO) | Prevents erratic startup below 4.2V input, ensuring clean power-up sequencing |
| Internal soft-start | Reduces inrush current during turn-on, avoiding input rail droop in shared supply systems |
Applications
| Industrial Data Acquisition | Portable Test Equipment |
|---|---|
Use Scenario: Signal conditioning stage in 16-bit data loggers using dual-supply op-amps and precision ADCs. IC Role / Device Role / Timing Role: Provides isolated +5V and −5V rails for analog front-end amplification and reference buffering. Use Value: ±1.5% output accuracy maintains ADC full-scale linearity; 200mA +5V output supports multiple op-amp stages. | Use Scenario: Battery-powered handheld multimeter with LCD display and analog input protection. IC Role / Device Role / Timing Role: Generates negative bias for LCD contrast control and positive rail for microcontroller and analog circuitry. Use Value: 200kHz switching frequency minimizes EMI near sensitive measurement inputs; SOIC-W package enables compact PCB layout. |
| Medical Sensor Interfaces | Process Control Transmitters |
Use Scenario: Low-noise EEG front-end amplifier requiring ultra-stable dual supplies. IC Role / Device Role / Timing Role: Delivers low-ripple ±5V rails with tight regulation to minimize offset drift in instrumentation amplifiers. Use Value: Internal soft-start prevents transient-induced baseline shift during power-up; thermal shutdown protects against enclosure overheating. | Use Scenario: 4–20mA loop-powered transmitter with onboard signal isolation and sensor excitation. IC Role / Device Role / Timing Role: Supplies isolated analog circuitry and digital isolator side while maintaining strict input current budget. Use Value: 4.5V–5.5V input range matches regulated loop supply; 100mA −5V output powers isolation amplifier bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2663MX/NOPB | Charge-pump topology; no inductors required; max −5V output = 60mA; no +5V output | Suitable only for low-current negative bias; cannot replace dual-rail analog supply needs | Select only when inductor-free design and <60mA −5V are acceptable; not a functional substitute for MAX743CWE+T |
| TPS65131RGTR | Higher +5V output (300mA), same −5V (100mA); 1.2MHz switching; QFN-16 package | Better suited for space-constrained designs needing higher positive rail current | Choose TPS65131RGTR if board area is limited and +5V load exceeds 200mA; requires re-layout due to QFN footprint |
Compared with LM2663MX/NOPB and TPS65131RGTR, the MAX743CWE+T uniquely delivers balanced +5V/−5V outputs with integrated power switches in SOIC-W, making it optimal for legacy-compatible industrial analog boards where inductor-based efficiency and 200mA +5V capability are essential.
Availability
MAX743CWE+T is available at Aetrix Electronics and suitable for industrial data acquisition, portable test equipment, and medical sensor interface designs requiring stable component supply and long-term production continuity.
Supply support for MAX743CWE+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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX743CWE+T belongs to Maxim's dual-output DC-DC regulator product line, engineered specifically for generating matched ±5V rails from a single +5V source in space- and cost-sensitive analog systems.
FAQ
What is the maximum allowable input voltage for the MAX743CWE+T?
The MAX743CWE+T has an absolute maximum input voltage rating of 6.0V. However, its specified operating input range is strictly 4.5V to 5.5V. Exceeding 5.5V may cause overvoltage stress on internal MOSFETs and feedback circuitry, potentially leading to premature failure. Always maintain input within this window for reliable operation of the MAX743CWE+T.
Does the MAX743CWE+T require external inductors?
Yes, the MAX743CWE+T requires two external inductors-one for the +5V buck output and one for the −5V inverting output-as well as external Schottky diodes and output capacitors. Its internal 0.3Ω N-channel MOSFETs drive these external passive components; no inductorless operation is supported. This is a key design requirement for the MAX743CWE+T.
Can the MAX743CWE+T generate outputs other than ±5V?
No, the MAX743CWE+T is factory-trimmed for fixed +5V and −5V outputs. Its feedback resistors are internal and non-adjustable. Output voltages cannot be modified via external resistor dividers or programming pins. Any deviation from ±5V requires selecting a different regulator, such as the adjustable MAX744A, not the MAX743CWE+T.
Is the MAX743CWE+T RoHS-compliant and lead-free?
Yes, the MAX743CWE+T is RoHS-compliant and lead-free per Maxim's standard packaging specifications. The "+T" suffix indicates tape-and-reel packaging with lead-free (Pb-free) terminations and halogen-free molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 3 requirements.
What thermal derating applies to the MAX743CWE+T in SOIC-W package?
The MAX743CWE+T specifies a junction-to-ambient thermal resistance (θJA) of 70°C/W for the SOIC-W package on a 2-layer PCB with 1-in² copper pour. At ambient temperatures above +70°C, output current must be reduced linearly to maintain junction temperature ≤ +150°C. Full 200mA +5V/100mA −5V operation is guaranteed only up to +70°C ambient for the MAX743CWE+T.
MAX743CWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX743CWE+T FAQ
1.How can I place an order for MAX743CWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX743CWE+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 MAX743CWE+T reliable?
The price and inventory of MAX743CWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX743CWE+T is usually 5 days.
3.What payment methods are accepted for MAX743CWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX743CWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX743CWE+T?
MAX743CWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX743CWE+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 MAX743CWE+T?
For technical support, including MAX743CWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX743CWE+T requirements.
6.How does Aetrix verify that MAX743CWE+T is sourced from the original manufacturer or authorized distributors?
All MAX743CWE+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 MAX743CWE+T meets industry standards.
7.What is the process for return or replacement of MAX743CWE+T?
All MAX743CWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX743CWE+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 MAX743CWE+T part is unused and in its original packaging.
Return procedure for MAX743CWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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