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Analog Devices Inc. ADP3634ARHZ
- Part No.:
- ADP3634ARHZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
ADP3634ARHZ.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:209
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Product details
Overview
ADP3634ARHZ from Analog Devices is a high-speed, dual-channel, 4 A low-side MOSFET driver with integrated thermal protection and 3.3 V-compatible logic inputs. It operates from 9.5 V to 18 V supply voltage, delivers 10 ns typical rise/fall times into 2.2 nF load, and features matched propagation delays (≤2 ns mismatch) for synchronous gate drive in DC-DC converters and motor drives.
For engineers reviewing the ADP3634ARHZ datasheet, ADP3634ARHZ pinout, ADP3634ARHZ application, or ADP3634ARHZ equivalent, key selection criteria include its 9.5–18 V UVLO threshold, open-drain overtemperature warning (OTW), parallelable dual outputs, SOIC_N_EP and MINI_SO_EP package options, and precise shutdown comparator for redundant OVP/OCP signaling.
Technical Context
The ADP3634ARHZ implements two independent low-side N-channel MOSFET drivers with internal VDD biasing and PGND-referenced output stages. Its input structure supports 3.3 V logic while tolerating up to VDD-level signals, and includes internal pull-downs to ensure safe default-off behavior when inputs float.
It integrates dual-level thermal protection: an overtemperature warning flag (OTW, active-low open drain) triggers at 120°C–150°C, and automatic shutdown activates at 150°C–180°C with 30°C hysteresis. The SD pin uses a precision comparator with 240–320 mV hysteresis for robust fault signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 9.5 V to 18 V - Enables direct use with 12 V intermediate bus rails in industrial and telecom power supplies. |
| Rise/Fall Time | 10 ns typical @ 2.2 nF - Supports >10 MHz switching frequencies with minimal dead-time uncertainty in hard-switched topologies. |
| Peak Output Current | ±4 A - Sufficient to rapidly charge/discharge high-QG MOSFETs (e.g., >100 nC) without external buffers. |
| Propagation Delay Mismatch | ≤2 ns - Ensures tight timing alignment between channels for interleaved or synchronous rectifier configurations. |
| UVLO Threshold | 8.0 V (on) / 7.0 V (off) - Provides clean startup/shutdown margin above 7 V brownout conditions in 12 V systems. |
| OTW Activation Temp | 120°C–150°C - Early-warning signal allows system-level thermal derating before catastrophic shutdown at 150°C–180°C. |
| Input Logic Compatibility | 3.3 V CMOS/TTL - Interfaces directly with digital PWM controllers (e.g., ADP1051, UCD3138) without level-shifting. |
Pinout & Package
ADP3634ARHZ is housed in an 8-lead MINI_SO_EP package with exposed thermal pad, optimized for high-current, high-frequency PCB layouts. Pin 1 is SD (shutdown), Pin 2 is INA (noninverting input for Channel A), Pin 3 is PGND (power ground), Pin 4 is INB (noninverting input for Channel B), Pin 5 is OUTB (Channel B output), Pin 6 is VDD (supply), Pin 7 is OUTA (Channel A output), and Pin 8 is OTW (open-drain overtemperature warning).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD | Active-high shutdown control | Disables both outputs when pulled high; internal pull-up requires external pull-down for normal operation. |
| INA, INB | Noninverting logic inputs | Directly drive respective channel outputs with no inversion; compatible with 3.3 V controller outputs. |
| PGND | Power ground reference | Must be connected to MOSFET source node with minimal inductance to prevent shoot-through during switching. |
| OUTA, OUTB | Low-side gate drive outputs | Each delivers ±4 A peak into capacitive loads; internally biased to VDD/PGND for fast turn-on/turn-off. |
| VDD | Driver supply input | Requires local 4.7 µF ceramic bypass capacitor to PGND; supports 9.5–18 V operation with UVLO hysteresis. |
| OTW | Open-drain thermal warning flag | Active-low signal pulled low at junction temp ≥120°C; wire-OR'able with other ADP36xx devices on shared warning bus. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel parallel operation | INA and INB tied together with OUTA/OUTB paralleled increases effective drive current to ~8 A and reduces per-channel thermal stress. |
| Precision SD comparator | 240–320 mV hysteresis enables reliable detection of scaled-down OVP/OCP signals without external comparators. |
| Thermally enhanced MINI_SO_EP | θJA = 43°C/W (JEDEC 4-layer board) - 27% lower thermal resistance than SOIC_N_EP, enabling higher ambient operation. |
| Matched inter-channel timing | ≤2 ns propagation delay mismatch ensures simultaneous switching critical for phase-shifted full-bridge or LLC resonant converters. |
| Robust input structure | Internal pull-downs guarantee OFF-state default; VIH/VIL thresholds (2.0 V/0.8 V) tolerate slow-rising or noisy controller signals. |
Applications
| AC-to-DC SMPS | Isolated DC-DC Converters |
|---|---|
Use Scenario: Driving synchronous rectifier MOSFETs in LLC resonant or active clamp forward topologies operating at 200–500 kHz. IC Role / Device Role / Timing Role: Low-side gate driver providing fast, matched turn-on/turn-off of dual N-channel MOSFETs referenced to secondary-side ground. Use Value: 10 ns rise/fall time minimizes conduction overlap loss; OTW flag enables real-time thermal monitoring of secondary-side power stage. |
Use Scenario: Gate driving primary-side half-bridge switches in isolated flyback or forward converters with digital PWM controllers. IC Role / Device Role / Timing Role: Dual low-side driver interfacing 3.3 V digital controller outputs to 12 V gate drive rails for N-channel MOSFETs. Use Value: 9.5–18 V supply range matches common auxiliary bias rails; SD pin provides hardware-level fault override independent of controller firmware. |
| Motor Drive Half-Bridge | Industrial UPS Inverter Stage |
Use Scenario: Driving complementary N-channel MOSFETs in 24 V or 48 V BLDC motor half-bridge modules with current sensing. IC Role / Device Role / Timing Role: Dual-channel gate driver delivering matched timing and ±4 A peak current to minimize shoot-through risk. Use Value: ≤2 ns channel-to-channel delay matching ensures precise dead-time control; PGND pin placement simplifies Kelvin source connection for shunt-based current sensing. |
Use Scenario: Gate driving parallel N-channel MOSFETs in 3-phase inverter legs of line-interactive UPS systems. IC Role / Device Role / Timing Role: Parallel-configured ADP3634ARHZ units provide scalable 8 A drive per leg with shared OTW monitoring. Use Value: Open-drain OTW pins enable centralized thermal alarm across all three phases; MINI_SO_EP package saves PCB area in space-constrained UPS modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-side MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP3624ARHZ | 4.5 V–18 V supply range; lower UVLO (4.2 V typ) enables use with 5 V bias rails. | Suitable for 5 V-powered systems where ADP3634ARHZ's 9.5 V minimum would prevent startup. | Select ADP3624ARHZ when main supply is <9.5 V; otherwise ADP3634ARHZ offers tighter UVLO hysteresis (1.0 V vs. 0.3 V) and higher noise immunity. |
| LM5113SDX/NOPB | 6 V–100 V supply; higher voltage rating but slower 25 ns rise time and no OTW output. | Better suited for high-voltage industrial motor drives (>30 V) where thermal warning is handled externally. | Choose LM5113SDX/NOPB only when >18 V operation is required; ADP3634ARHZ provides superior speed, thermal visibility, and layout efficiency below 18 V. |
Compared with ADP3624ARHZ and LM5113SDX/NOPB, the ADP3634ARHZ delivers optimal balance of speed (10 ns), thermal intelligence (OTW + shutdown), and 12 V system compatibility - making it the preferred choice for compact, high-efficiency 9.5–18 V power stages requiring reliability-aware gate drive.
Availability
ADP3634ARHZ is available at Aetrix Electronics and suitable for AC-to-DC switch mode power supplies, isolated DC-DC converters, and motor drive half-bridges requiring stable component supply, consistent thermal performance, and long-term industrial lifecycle support.
Supply support for ADP3634ARHZ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The ADP36xx family was designed specifically for high-frequency, high-reliability power conversion systems - emphasizing fast switching, precise fault detection, and thermally robust packaging for industrial, telecom, and computing power supplies.
FAQ
What is the recommended bypass capacitor for ADP3634ARHZ VDD?
A 4.7 µF low-ESR ceramic capacitor placed as close as possible to the VDD and PGND pins is required for stable operation. A parallel 100 nF ceramic capacitor improves high-frequency decoupling. Improper decoupling increases rise times, causes resonance on OUTA/OUTB, and risks device damage due to inductive overvoltage - as confirmed in the ADP3634ARHZ datasheet Section "Supply Capacitor Selection".
Does ADP3634ARHZ support parallel operation of its two channels?
Yes, ADP3634ARHZ supports parallel operation: connect INA and INB together, and tie OUTA and OUTB together to double peak drive current to ~8 A and reduce per-channel power dissipation. Layout symmetry is critical to ensure balanced current sharing - detailed in Figure 25 and "Parallel Operation" section of the ADP3634ARHZ datasheet.
What is the function of the OTW pin on ADP3634ARHZ?
The OTW (Overtemperature Warning) pin is an open-drain, active-low output that pulls low when the junction temperature reaches 120°C–150°C. It enables early thermal derating before shutdown at 150°C–180°C and supports wire-OR'ed multi-device warning buses - as specified in Table 1 and Figure 6 of the ADP3634ARHZ datasheet.
Can ADP3634ARHZ drive high-side N-channel MOSFETs?
No, ADP3634ARHZ is a dedicated low-side driver with outputs referenced to PGND. It lacks high-side floating bias circuitry or level-shifting capability. For high-side N-MOSFET drive, a dedicated high-side or half-bridge driver (e.g., ADP3653) must be used - explicitly stated in the "Low-Side Drivers (OUTA, OUTB)" section of the ADP3634ARHZ datasheet.
What is the purpose of the SD pin on ADP3634ARHZ?
The SD (Shutdown) pin is an active-high input with a precision internal comparator (1.21–1.35 V threshold, 240–320 mV hysteresis) that disables both outputs when asserted. It enables redundant overvoltage or overcurrent protection independent of the main controller - as described in the "Shutdown (SD) Function" and Figure 22 sections of the ADP3634ARHZ datasheet.
ADP3634ARHZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 9.5V ~ 18V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- 4A, 4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 10ns, 10ns
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
ADP3634ARHZ FAQ
1.How can I place an order for ADP3634ARHZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3634ARHZ 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 ADP3634ARHZ reliable?
The price and inventory of ADP3634ARHZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3634ARHZ is usually 5 days.
3.What payment methods are accepted for ADP3634ARHZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3634ARHZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3634ARHZ?
ADP3634ARHZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3634ARHZ 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 ADP3634ARHZ?
For technical support, including ADP3634ARHZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3634ARHZ requirements.
6.How does Aetrix verify that ADP3634ARHZ is sourced from the original manufacturer or authorized distributors?
All ADP3634ARHZ 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 ADP3634ARHZ meets industry standards.
7.What is the process for return or replacement of ADP3634ARHZ?
All ADP3634ARHZ units undergo pre-shipment inspection (PSI). If there is an issue with ADP3634ARHZ, 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 ADP3634ARHZ part is unused and in its original packaging.
Return procedure for ADP3634ARHZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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