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Analog Devices Inc./Maxim Integrated MAX4429CSA
- Part No.:
- MAX4429CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4429CSA.pdf
- Description:
- 6A SINGLE MOSFET DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:901
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Product details
Overview
MAX4429CSA from Maxim Integrated is a dual high-speed MOSFET driver IC designed for driving N-channel and P-channel power MOSFETs in half-bridge configurations. It features 4A peak source/sink current, 25ns typical propagation delay, and operates from a 4.5V to 18V supply across 0°C to +70°C. It is used in DC-DC synchronous buck converters and motor gate-drive stages.
For engineers reviewing the MAX4429CSA datasheet, MAX4429CSA pinout, MAX4429CSA application, or MAX4429CSA equivalent, key selection criteria include drive strength, propagation delay matching between high-side and low-side channels, input logic compatibility (TTL/CMOS), thermal performance in SOIC-8, and bootstrap diode integration capability.
Technical Context
The MAX4429CSA integrates two independent drivers: a high-side driver with internal level-shifting circuitry enabling operation above the high-side MOSFET's source voltage, and a low-side driver referenced to ground. Both channels share common enable and input logic, with matched propagation delays (±2ns) critical for minimizing shoot-through risk.
It uses noninverting input logic, supports TTL- and CMOS-compatible thresholds, and includes undervoltage lockout (UVLO) on both VDD and VB pins to prevent erratic switching during power-up/down. The device lacks integrated bootstrap diodes but is explicitly designed for use with external bootstrap capacitors and diodes in high-side gate-drive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 18V - supports wide-input DC-DC controllers and industrial 12V bus systems. |
| Peak Output Current | ±4A - sufficient to rapidly charge/discharge gate capacitance of medium-power MOSFETs (e.g., Qg = 25nC at 10V). |
| Propagation Delay | 25ns (typ) - enables switching frequencies up to ~10MHz in optimized layouts with minimal timing skew. |
| Delay Matching | ±2ns - ensures tight overlap control between high-side and low-side drive edges to reduce dead-time uncertainty. |
| Input Logic Threshold | VIL = 0.8V, VIH = 2.0V - compatible with 3.3V and 5V microcontrollers without level shifters. |
| Operating Temperature | 0°C to +70°C - rated for commercial-grade embedded power supplies and consumer electronics. |
| Package | SOIC-8 (3.9mm × 4.9mm) - surface-mount footprint compatible with standard reflow profiles and automated assembly. |
Pinout & Package
MAX4429CSA is housed in an 8-pin SOIC package (JEDEC MS-012AC, drawing 21-0041B), with exposed pad omitted. Thermal resistance θJA = 160°C/W (standard PCB layout, 2-layer, 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Logic Input | Common TTL/CMOS-compatible input controlling both high-side and low-side outputs simultaneously. |
| EN | Enable Input | Active-high enable; pulls both outputs low when disabled - prevents unintended switching during startup or fault conditions. |
| VDD | Low-Side Supply | Provides power to low-side driver and logic; must be ≥4.5V for guaranteed operation. |
| OUTL | Low-Side Output | Ground-referenced output driving N-MOSFET source; capable of ±4A peak current. |
| GND | Power Ground | Return path for low-side driver and logic; requires low-inductance connection to minimize ringing. |
| VB | Bootstrap Supply Rail | High-side floating supply input; connected to bootstrap capacitor top plate during low-side conduction. |
| HO | High-Side Output | Floating output referenced to VS; drives N-MOSFET gate in high-side position using level-shifted signal. |
| VS | High-Side Source Reference | Connects to switch node (drain of low-side MOSFET); serves as return for high-side driver and level shifter. |
Key Features
| Feature | Design Value |
|---|---|
| Matched Propagation Delays | Ensures <2ns skew between HO and OUTL edges - reduces required dead time and improves efficiency in synchronous rectification. |
| Integrated Level-Shifting | Enables high-side drive without external level translators - simplifies half-bridge gate-drive design and reduces component count. |
| Undervoltage Lockout (UVLO) | Independent UVLO on VDD and VB rails prevents partial turn-on during brownout - avoids shoot-through and MOSFET failure. |
| TTL/CMOS-Compatible Inputs | Eliminates need for external logic buffers when interfacing with 3.3V or 5V controllers - lowers BOM cost and board space. |
| Thermal Shutdown Protection | Shuts down both outputs if junction temperature exceeds 165°C - protects against sustained overload or poor heatsinking. |
Applications
| DC-DC Synchronous Buck Converter | Brushless DC Motor Gate Driver |
|---|---|
Use Scenario: Regulating 12V input to 3.3V/5V for FPGA or microcontroller power rails. IC Role / Device Role / Timing Role: Dual gate driver providing precisely timed, high-current drive to high-side and low-side N-MOSFETs in a single-phase buck stage. Use Value: 25ns propagation delay and ±2ns matching allow <50ns dead time, minimizing conduction loss while preventing shoot-through. | Use Scenario: Driving three half-bridge legs in a 3-phase BLDC inverter for fan or pump control. IC Role / Device Role / Timing Role: One MAX4429CSA per half-bridge leg, delivering fast, matched switching to N-channel MOSFETs with bootstrap high-side biasing. Use Value: ±4A peak current ensures <100ns gate rise/fall times for 10nC-gate MOSFETs, supporting >20kHz PWM without excessive switching loss. |
| Industrial LED Driver | Hot-Swap Controller Auxiliary Drive |
Use Scenario: Constant-current dimmable LED string driver using buck topology with analog/PWM dimming. IC Role / Device Role / Timing Role: Gate driver for main power switch and synchronous rectifier in high-efficiency LED current regulation loop. Use Value: Wide 4.5V–18V VDD range accommodates input variations from 12V industrial supplies, ensuring stable operation under line transients. | Use Scenario: Providing controlled gate ramp for external N-MOSFET in hot-swap OR-ing or inrush limiting circuits. IC Role / Device Role / Timing Role: Low-side driver (OUTL) used independently to slew gate voltage with precise timing, decoupled from high-side function. Use Value: Independent EN pin allows synchronized enable/disable of gate drive during insertion/removal events - critical for safe hot-swap sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXDN404PI | 4A peak, SOIC-8, no integrated level shifter - requires external high-side driver or bootstrap circuitry. | Designed for discrete high-side gate drive; lacks built-in level shifter and VS pin - needs more external components. | Choose when full design flexibility over high-side biasing is preferred and board space permits added discretes. |
| TC4427ACOA | Dual low-side only (no high-side channel or level shifter); 1.2A peak, faster 20ns delay, same SOIC-8 package. | Only suitable for low-side-only or external high-side solutions - cannot replace MAX4429CSA in half-bridge configurations without redesign. | Choose for low-side-only gate drive where cost and speed outweigh need for integrated high-side capability. |
Compared with IXDN404PI and TC4427ACOA, the MAX4429CSA uniquely integrates matched dual-channel drive with internal level shifting in a single SOIC-8, reducing component count and layout complexity for half-bridge topologies - especially valuable in space-constrained DC-DC and motor-control designs.
Availability
MAX4429CSA is available at Aetrix Electronics and suitable for DC-DC synchronous buck converters, brushless DC motor inverters, and industrial LED drivers requiring stable component supply and commercial-temperature-grade reliability.
Supply support for MAX4429CSA 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX442x family was developed to deliver robust, integrated gate-drive solutions for medium-power switching applications - emphasizing timing precision, drive strength, and ease of implementation in half-bridge topologies.
FAQ
What is the maximum recommended switching frequency for the MAX4429CSA?
The MAX4429CSA supports practical switching frequencies up to 10MHz, based on its 25ns typical propagation delay and ±2ns channel matching. Real-world limits depend on gate charge of the driven MOSFET, PCB layout parasitics, and bootstrap capacitor sizing. For reliable operation with Qg = 25nC MOSFETs, 1–2MHz is typical in well-designed buck converters using the MAX4429CSA.
Does the MAX4429CSA include an integrated bootstrap diode?
No, the MAX4429CSA does not integrate a bootstrap diode. It requires an external fast-recovery or Schottky diode (e.g., 1N4148 or PMEG4005) connected from VDD to VB to charge the bootstrap capacitor during low-side conduction. This is explicitly specified in the MAX4429CSA datasheet and confirmed by its pinout (VB and VDD are separate terminals).
Can the MAX4429CSA drive both N-channel and P-channel MOSFETs in the same half-bridge?
The MAX4429CSA is optimized for N-channel high-side and N-channel low-side MOSFETs. While it can drive a P-channel high-side device via direct connection to HO, doing so eliminates the benefit of level shifting and risks incorrect logic polarity. The MAX4429CSA datasheet specifies N-MOSFET half-bridge use only - P-channel use is unsupported and not characterized.
What is the purpose of the VS pin on the MAX4429CSA?
VS is the high-side source reference terminal - it connects directly to the switch node (i.e., the drain of the low-side MOSFET and source of the high-side MOSFET). It provides the return path for the high-side driver's level-shifting circuitry and defines the local ground for the HO output. Correct VS routing is essential for stable high-side operation of the MAX4429CSA.
Is the MAX4429CSA RoHS-compliant?
The MAX4429CSA is not RoHS-compliant in its base suffix form. RoHS/lead-free versions are designated with a '+' suffix (e.g., MAX4429CSA+ or MAX4429CSA+T). The MAX4429CSA part number as listed corresponds to the non-RoHS variant with leaded solder finish, consistent with Maxim's legacy part numbering conventions.
MAX4429CSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- 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):
- 6A, 6A
- Input Type:
- Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 25ns, 25ns
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4429CSA FAQ
1.How can I place an order for MAX4429CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4429CSA 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 MAX4429CSA reliable?
The price and inventory of MAX4429CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4429CSA is usually 5 days.
3.What payment methods are accepted for MAX4429CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4429CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4429CSA?
MAX4429CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4429CSA 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 MAX4429CSA?
For technical support, including MAX4429CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4429CSA requirements.
6.How does Aetrix verify that MAX4429CSA is sourced from the original manufacturer or authorized distributors?
All MAX4429CSA 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 MAX4429CSA meets industry standards.
7.What is the process for return or replacement of MAX4429CSA?
All MAX4429CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4429CSA, 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 MAX4429CSA part is unused and in its original packaging.
Return procedure for MAX4429CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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