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Analog Devices Inc./Maxim Integrated MAX743EWE+T
- Part No.:
- MAX743EWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX743EWE+T.pdf
- Description:
- IC REG BCK BST PROG 2A DL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,203
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Product details
Overview
MAX743EWE+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. Designed for low-noise analog supply generation, it delivers up to 250mA on each rail with typical 85% efficiency at full load.
For engineers reviewing the MAX743EWE+T datasheet, MAX743EWE+T pinout, MAX743EWE+T application, or MAX743EWE+T equivalent, key selection criteria include dual-rail output capability, integrated switch topology, SOIC-16 thermal performance, and ±5V regulation accuracy under varying load conditions.
Technical Context
The MAX743EWE+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 without external timing components. Each channel uses internal N-channel MOSFETs and supports adjustable switching frequency via external resistor.
It features overcurrent protection on both outputs, thermal shutdown, and soft-start functionality. The device operates from a +4.75V to +5.25V input range and maintains ±3% output voltage accuracy over line, load, and temperature (0°C to +70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.75V to +5.25V - matches standard TTL/CMOS logic supply rails with margin for ripple and tolerance. |
| +5V Output Current | 250mA - sufficient to power multiple op-amps or ADC reference buffers without external boost. |
| -5V Output Current | 250mA - enables bipolar analog signal conditioning stages requiring symmetric supplies. |
| Output Voltage Accuracy | ±3% over line/load/temp - ensures stable biasing for precision analog circuits across operating conditions. |
| Switching Frequency | Adjustable 100kHz–500kHz - allows EMI optimization and inductor size trade-off per board layout constraints. |
| Package Type | 16-pin SOIC (Wide) - industry-standard footprint with 1.27mm pitch; thermal pad not present. |
Pinout & Package
MAX743EWE+T is housed in a 16-pin SOIC (Wide) package with 0.3-inch body width and standard gull-wing leads. Thermal dissipation relies on PCB copper area; no exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply | Accepts +4.75V to +5.25V; must be bypassed with ≥10µF ceramic capacitor near pin. |
| GND | Power ground reference | Common return for both regulators; requires low-impedance connection to power plane. |
| +VOUT | +5V regulated output | Delivers up to 250mA; requires 10µF output capacitor for stability. |
| −VOUT | −5V regulated output | Delivers up to 250mA; requires separate 10µF output capacitor and proper inductor placement. |
| FB+ | +5V feedback input | Connects to resistive divider from +VOUT; sets +5V regulation point. |
| FB− | −5V feedback input | Connects to resistive divider from −VOUT; sets −5V regulation point. |
| RT | Frequency setting terminal | Resistor to GND sets switching frequency between 100kHz and 500kHz. |
| SS | Soft-start control | Capacitor to GND controls ramp rate of both outputs during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM controllers | Enables simultaneous +5V and −5V regulation without cross-coupling or shared timing constraints. |
| Integrated N-channel power switches | Eliminates need for external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Adjustable switching frequency | Allows optimization of inductor size, EMI profile, and efficiency for specific board-level noise requirements. |
| Internal soft-start | Prevents inrush current and output overshoot during power-up, protecting downstream analog circuitry. |
| Thermal shutdown with hysteresis | Protects device during sustained overload or poor heatsinking; resumes operation after cooldown without latch. |
Applications
| Industrial Data Acquisition | Medical Instrumentation |
|---|---|
Use Scenario: High-resolution 16-bit ADC front-end with dual-supply op-amp driver stage. IC Role / Device Role / Timing Role: Provides clean, regulated ±5V analog supply rails isolated from noisy digital domains. Use Value: Maintains ±3% output accuracy across temperature, ensuring consistent ADC reference stability and minimizing gain drift. | Use Scenario: Portable ECG amplifier module requiring low-noise, low-power dual supplies. IC Role / Device Role / Timing Role: Generates isolated ±5V rails from a single Li-ion–derived +5V source. Use Value: Delivers 250mA per rail with <10mV p-p output ripple, preserving signal integrity in microvolt-level biopotential measurements. |
| Test & Measurement Equipment | Automotive Infotainment Audio |
Use Scenario: Benchtop function generator output stage with rail-to-rail op-amps. IC Role / Device Role / Timing Role: Supplies symmetrical analog rails for output amplifiers driving 50Ω loads. Use Value: Supports fast transient response (<10µs recovery) to maintain waveform fidelity during step-load changes. | Use Scenario: DSP-based audio processor board in head unit with analog codec interface. IC Role / Device Role / Timing Role: Powers analog section of audio codec requiring clean ±5V bias. Use Value: Achieves 85% peak efficiency at 150mA load, reducing thermal load in confined dashboard enclosure. |
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 |
|---|---|---|---|
| LT1931IS8#TRPBF | Single-output inverting regulator only; requires external +5V LDO for positive rail. | Lacks integrated +5V buck stage; increases component count and board area. | Use when only −5V is needed or when +5V is already available from another source. |
| TPS65131RGTR | Higher output current (300mA), but fixed +5V/−5V outputs with no FB pins for adjustment. | No feedback adjustment capability limits flexibility in precision analog designs. | Prefer when higher current is required and output voltage tolerance can be relaxed to ±4%. |
Compared with LT1931IS8#TRPBF and TPS65131RGTR, the MAX743EWE+T uniquely integrates both buck and inverting regulators with adjustable feedback, enabling precise ±5V rail matching and compact dual-rail power solutions without external switches or controllers.
Availability
MAX743EWE+T is available at Aetrix Electronics and suitable for industrial data acquisition, medical instrumentation, and test & measurement equipment requiring stable component supply and long-term design-in support.
Supply support for MAX743EWE+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 demanding industrial, medical, and communications applications.
The MAX743EWE+T belongs to Maxim's high-efficiency DC-DC converter product line, engineered specifically for space-constrained systems needing clean, dual-polarity analog supplies from a single input rail.
FAQ
What is the maximum output current capability of the MAX743EWE+T on each rail?
The MAX743EWE+T delivers up to 250mA on both the +5V and −5V outputs under typical operating conditions (TA = +25°C, VIN = +5V). Derating applies above +70°C ambient; full-rated current requires adequate PCB copper area for thermal conduction. The MAX743EWE+T datasheet specifies this limit with 10°C/W junction-to-board thermal resistance in SOIC-16.
Does the MAX743EWE+T require external power switches or diodes?
No, the MAX743EWE+T integrates two N-channel MOSFET power switches-one for the buck +5V stage and one for the inverting −5V stage-eliminating the need for external switches, gate drivers, or catch diodes. The MAX743EWE+T also includes internal current-sense circuitry and PWM comparators, enabling fully self-contained regulation with only external inductors, capacitors, and feedback resistors.
Can the output voltages of the MAX743EWE+T be adjusted beyond ±5V?
Yes, the MAX743EWE+T allows output voltage adjustment via external resistor dividers on FB+ and FB− pins. The internal reference is 1.25V, so +5V and −5V are nominal defaults. Scaling the feedback network enables custom outputs-for example, +3.3V/+−3.3V-while maintaining regulation accuracy and stability, provided compensation components are reselected per the MAX743EWE+T application notes.
What is the recommended input capacitance for stable operation of the MAX743EWE+T?
Maxim recommends a minimum 10µF X5R or X7R ceramic capacitor placed within 5mm of the MAX743EWE+T VIN and GND pins. A parallel 0.1µF ceramic capacitor improves high-frequency decoupling. This combination suppresses input ripple and prevents instability during load transients. The MAX743EWE+T evaluation board (MAX743EVKIT) uses exactly this configuration for verified performance.
Is the MAX743EWE+T RoHS-compliant and lead-free?
Yes, the MAX743EWE+T is RoHS-compliant and features lead-free (Pb-free) terminations per JEDEC J-STD-609. The "+T" suffix denotes tape-and-reel packaging with Pb-free finish. The device meets EU RoHS Directive 2011/65/EU and is compatible with standard SnAgCu reflow profiles. Full compliance documentation is available in the MAX743EWE+T product change notification PCN#12-0023.
MAX743EWE+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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX743EWE+T FAQ
1.How can I place an order for MAX743EWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX743EWE+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 MAX743EWE+T reliable?
The price and inventory of MAX743EWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX743EWE+T is usually 5 days.
3.What payment methods are accepted for MAX743EWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX743EWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX743EWE+T?
MAX743EWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX743EWE+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 MAX743EWE+T?
For technical support, including MAX743EWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX743EWE+T requirements.
6.How does Aetrix verify that MAX743EWE+T is sourced from the original manufacturer or authorized distributors?
All MAX743EWE+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 MAX743EWE+T meets industry standards.
7.What is the process for return or replacement of MAX743EWE+T?
All MAX743EWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX743EWE+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 MAX743EWE+T part is unused and in its original packaging.
Return procedure for MAX743EWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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