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Analog Devices Inc./Maxim Integrated MAX4426CSA+
- Part No.:
- MAX4426CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4426CSA+.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:578
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Product details
Overview
MAX4426CSA+ from Maxim Integrated is a dual inverting high-speed MOSFET driver IC designed to translate TTL/CMOS logic inputs into robust 1.5A peak gate-drive outputs for power MOSFETs. It operates from 4.5V to 18V, delivers 20ns typical rise/fall times with 1000pF load, and features 4Ω typical output resistance at +25°C - enabling fast, low-loss switching in DC-DC converters and motor controllers.
For engineers reviewing the MAX4426CSA+ datasheet, MAX4426CSA+ pinout, MAX4426CSA+ application, or MAX4426CSA+ equivalent, key selection criteria include guaranteed inverting dual-output topology, SO-8 package compatibility, temperature-stable delay times (tD1 ≤ 40ns, tD2 ≤ 60ns over –40°C to +85°C), and latchup/ESD protection for industrial gate-drive reliability.
Technical Context
The MAX4426CSA+ integrates two matched inverting high-current drivers on a single die, each capable of sourcing/sinking 1.5A peak current while maintaining rail-to-rail output swing (VOH = VDD – 25mV, VOL = 25mV). Its internal architecture avoids crowbar current during transitions via controlled output stage timing, minimizing supply current spikes despite 3A transient demand.
Delay times (tD1, tD2) are explicitly characterized across supply voltage (4.5V–18V) and temperature (–40°C to +85°C), showing <10% variation - confirming stable timing behavior critical for synchronous buck or half-bridge control. Input thresholds (VIH = 2.4V, VIL = 0.8V) ensure direct TTL/CMOS interfacing without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Dual inverting - both channels invert input logic; required for complementary drive in high-side/low-side configurations. |
| Peak Output Current | 1.5A - sufficient to rapidly charge/discharge gate capacitance of >100nC power MOSFETs within nanoseconds. |
| Rise/Fall Time | 20ns typical (1000pF, VDD = 18V) - enables >20MHz effective switching in resonant or hard-switched topologies. |
| Supply Voltage Range | 4.5V to 18V - supports 5V, 12V, and 15V systems without external regulation; absolute max 20V prevents damage during transients. |
| Output Resistance | 4Ω typical (VDD = 18V, TA = +25°C) - ensures minimal I²R loss during gate charging, preserving MOSFET RDS(on) performance. |
| Input Logic Thresholds | VIH = 2.4V, VIL = 0.8V - fully compatible with standard 3.3V/5V CMOS and TTL logic families without interface circuitry. |
| Quiescent Supply Current | 1.8mA (both inputs high), 200µA (both inputs low) - enables low-power standby operation in battery-backed or energy-sensitive designs. |
Pinout & Package
MAX4426CSA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and rated for 0°C to +70°C operation. The package provides thermal performance suitable for continuous 471mW dissipation at +70°C (derated 5.88mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | No Connect | Internally unused; must remain unconnected per datasheet - no tie-to-ground or pull-up required. |
| 2, 4 | Inverting Input A / B | Logic inputs accepting TTL/CMOS levels; must not float - unused inputs require grounding to minimize supply current. |
| 3 | GND | Power ground reference for all internal circuitry and output stages; requires low-impedance connection to system ground plane. |
| 5, 7 | Inverting Output B / A | High-current gate-drive outputs; each sinks/sourced 1.5A peak; series damping resistors (5–20Ω) recommended to suppress ringing. |
| 6 | VDD | Positive supply input; requires local bypassing with 4.7µF low-ESR + 0.1µF ceramic capacitors placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Latchup Protection | Withstands >500mA reverse current - prevents destructive latchup during ground-bounce or hot-swap events. |
| ESD Protection | Rated per JEDEC JS-001 - survives ≥2kV HBM, ensuring robustness during board handling and assembly. |
| Delay Stability | tD1/tD2 vary <10% over 4.5V–18V supply range - eliminates need for supply-voltage compensation in timing-critical circuits. |
| Thermal Derating | SO package derates 5.88mW/°C above +70°C - enables predictable power budgeting in convection-cooled enclosures. |
| Input Noise Immunity | 50ns maximum allowed input dwell between VIH/VIL - prevents metastability-induced shoot-through in bridge drivers. |
Applications
| Switching Power Supplies | DC-DC Converters |
|---|---|
|
Use Scenario: High-frequency synchronous buck converter operating at 500kHz with 12V input and 3.3V/20A output. IC Role / Device Role / Timing Role: Dual inverting driver delivering complementary gate signals to high-side and low-side N-channel MOSFETs with matched propagation delays. Use Value: 20ns rise/fall times and 4Ω output resistance minimize dead-time uncertainty and conduction losses, improving efficiency by ≥1.2% at full load. |
Use Scenario: Isolated flyback controller with active clamp using dual-MOSFET primary switch. IC Role / Device Role / Timing Role: Inverting driver providing precise, rail-to-rail gate drive to clamp FET and main switch with sub-40ns delay matching. Use Value: Stable tD1/tD2 over temperature ensures consistent clamp timing across –40°C to +85°C, preventing transformer saturation. |
| Motor Controllers | Pin-Diode Drivers |
|
Use Scenario: 24V brushed DC motor H-bridge with PWM speed control up to 20kHz. IC Role / Device Role / Timing Role: Dual inverting driver controlling diagonal MOSFET pairs; GND-referenced outputs simplify bootstrap-free layout. Use Value: 1.5A peak current ensures <100ns turn-on of 50nC-gate MOSFETs, reducing switching losses and audible motor whine. |
Use Scenario: RF transmit/receive switch matrix requiring fast, low-charge-injection diode bias control. IC Role / Device Role / Timing Role: Inverting driver switching PIN diodes with nanosecond edge fidelity to minimize RF insertion loss during transition. Use Value: 25mV VOL and VDD–25mV VOH guarantee full diode forward/reverse bias swing, eliminating residual RF leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual inverting MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4426ESA+ | Same silicon, extended –40°C to +85°C temperature range; identical pinout and electrical specs. | Required for automotive under-hood or industrial ambient environments exceeding +70°C. | Select MAX4426ESA+ when operating beyond 0°C to +70°C; otherwise MAX4426CSA+ offers cost-optimized commercial-grade performance. |
| TC4426ACOA | Pin-compatible dual inverting driver (Microchip); 1.2A peak current, 30ns rise time, 6Ω output resistance. | Suitable for lower-power or cost-sensitive designs where 1.5A and 20ns performance are not mandatory. | Choose TC4426ACOA only if gate charge ≤60nC and switching frequency ≤300kHz; MAX4426CSA+ delivers superior drive strength and speed. |
Compared with MAX4426ESA+, the MAX4426CSA+ trades extended temperature capability for lower unit cost in commercial applications; versus TC4426ACOA, it provides 25% higher peak current and 33% faster edges - directly reducing MOSFET switching losses in high-efficiency power stages.
Availability
MAX4426CSA+ is available at Aetrix Electronics and suitable for switching power supplies, DC-DC converters, and motor controllers requiring stable component supply, commercial-temperature-grade reliability, and SO-8 footprint compatibility.
Supply support for MAX4426CSA+ 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, communications, and computing applications.
The MAX4426CSA+ belongs to Maxim's high-speed power driver product line, engineered specifically for efficient, reliable gate driving of N-channel MOSFETs in high-frequency switching topologies.
FAQ
What is the function of pins 1 and 8 on the MAX4426CSA+?
Pins 1 and 8 of the MAX4426CSA+ are No Connect (N.C.) terminals - internally unconnected and electrically isolated. They must remain unattached in PCB layout; no grounding, pulling, or routing is permitted. This configuration is confirmed in the official Maxim datasheet pin diagram for the SO-8 package variant.
Does the MAX4426CSA+ support noninverting operation?
No, the MAX4426CSA+ is exclusively a dual inverting MOSFET driver. Its internal architecture inverts both input signals - INA → OUTA (inverted), INB → OUTB (inverted). For noninverting or mixed inverting/noninverting functionality, designers must select MAX4427CSA+ or MAX4428CSA+, respectively; the MAX4426CSA+ does not offer configurable logic polarity.
What is the maximum capacitive load the MAX4426CSA+ can drive reliably?
The MAX4426CSA+ is characterized up to 10,000pF load in its typical operating curves, with rise/fall times increasing predictably (e.g., ~70ns at 10,000pF, VDD = 18V). For stable operation, layout best practices - including local bypassing and ground-plane integrity - are essential. Driving >10nC gate charge remains feasible due to its 1.5A peak current capability.
Is the MAX4426CSA+ pin-compatible with the MAX4426CPA?
Yes, the MAX4426CSA+ is pin-compatible with the MAX4426CPA - both share identical 8-pin SO (CSA) and 8-pin PDIP (CPA) footprints and identical pin functions (N.C., INA, GND, INB, OUTB, VDD, OUTA, N.C.). Mechanical dimensions differ, but PCB land patterns for SO-8 and PDIP-8 are distinct; thus, direct socket replacement requires matching package type.
How does the MAX4426CSA+ handle input noise or slow-rising signals?
The MAX4426CSA+ specifies a strict 50ns maximum allowable dwell time between VIH (2.4V) and VIL (0.8V) to prevent metastability. Inputs must transition cleanly; slow or noisy edges risk temporary shoot-through in driven bridges. Unused inputs must be grounded - not left floating - to avoid increased supply current and potential oscillation.
MAX4426CSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel, P-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 18V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.4V
- Current - Peak Output (Source, Sink):
- 1.5A, 1.5A
- Input Type:
- Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 20ns, 20ns
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4426CSA+ FAQ
1.How can I place an order for MAX4426CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4426CSA+ 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 MAX4426CSA+ reliable?
The price and inventory of MAX4426CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4426CSA+ is usually 5 days.
3.What payment methods are accepted for MAX4426CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4426CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4426CSA+?
MAX4426CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4426CSA+ 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 MAX4426CSA+?
For technical support, including MAX4426CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4426CSA+ requirements.
6.How does Aetrix verify that MAX4426CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX4426CSA+ 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 MAX4426CSA+ meets industry standards.
7.What is the process for return or replacement of MAX4426CSA+?
All MAX4426CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4426CSA+, 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 MAX4426CSA+ part is unused and in its original packaging.
Return procedure for MAX4426CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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