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Analog Devices Inc. LTC3722HGN-1#PBF
- Part No.:
- LTC3722HGN-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3722HGN-1#PBF.pdf
- Description:
- IC REG CTRLR FULL-BRIDGE 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,923
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Product details
Overview
LTC3722HGN-1#PBF from Analog Devices is a high-temperature-rated, peak current mode phase-shift PWM controller for zero-voltage-switched (ZVS) full-bridge DC/DC converters. It delivers adaptive ZVS delay control, programmable slope compensation, 50mA gate drivers (OUTA–F), 5V reference output, and operates across –40°C to 150°C junction temperature. Used in telecom infrastructure power supplies delivering up to 240W at 12V output.
For engineers reviewing the LTC3722HGN-1#PBF datasheet, LTC3722HGN-1#PBF pinout, LTC3722HGN-1#PBF application, or LTC3722HGN-1#PBF equivalent, this page provides verified functional identity, validated thermal rating, confirmed ZVS timing architecture, and real-world synchronous rectifier driver specifications - all specific to the H-grade variant in GN package.
Technical Context
The LTC3722HGN-1#PBF implements peak current mode control with programmable slope compensation and leading edge blanking (RLEB pin). Its adaptive ZVS circuitry independently delays MOSFET turn-on using SBUS, ADLY, and PDLY inputs referenced to primary-side bus voltage, enabling lossless switching across wide load ranges.
It integrates six 50mA gate drivers (OUTA–F), a 5V/18mA reference (VREF), 10.25V VCC UVLO with 4.2V hysteresis, and a 24-pin narrow SSOP (GN) package rated for 150°C junction operation. The device supports both fixed and adaptive ZVS modes, with manual delay set capability for secondary-side control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VJUNCTION Range | –40°C to 150°C - guaranteed operation at full spec under high-temp industrial/telecom conditions |
| ZVS Control Mode | Adaptive (SBUS + ADLY/PDLY) or fixed-delay - enables precise turn-on timing without external trim components |
| Gate Drive Outputs | 6× ±50mA drivers (OUTA–F) - directly interfaces with external gate drivers like LTC4440/LTC3901 |
| VREF Output | 5.00V ±1.5% (0–5mA load) - powers external circuitry and sets DPRG/SPRG resistor networks |
| Start-Up Current | 230µA max - enables low-power auxiliary supply startup in high-efficiency systems |
| Current Sense Threshold | 300mV (pulse-by-pulse), 650mV (overload) - defines cycle-by-cycle current limiting and hiccup-mode protection |
| Oscillator Frequency | 250kHz typ (CT = 270pF) - sets base switching frequency; adjustable via CT capacitor |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN), 0.15mm lead thickness, JEDEC MS-013AC, θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA, OUTC | High-side active leg drivers | Drive upper MOSFETs of full-bridge active leg; require external high-side gate drivers |
| OUTB, OUTD | Low-side passive/active leg drivers | Ground-referenced outputs for lower MOSFETs; support phase-shifted PWM timing |
| OUTE, OUTF | Synchronous rectifier drivers | 50mA outputs timed for secondary-side synchronous FETs; SPRG sets turn-off delay |
| ADLY, PDLY | ZVS delay control inputs | Voltage-programmed pins (0–2.5V) setting fixed active/passive leg transition delays |
| SBUS | Bus voltage sense input | 1.5V nominal at VIN mid-range; configures adaptive ZVS when connected to divider, fixed mode when tied to VREF |
| DPRG | Default ZVS delay programming | Resistor-to-VREF sets maximum ZVS delay for A/B/C/D outputs; nominal 2V bias |
| CS | Current sense comparator input | Accepts sensed voltage from primary-side current transformer or RSENSE; triggers pulse-by-pulse limit at 300mV |
| COMP | Error amplifier output | Drives phase modulator; connects to external compensation network for loop stability |
| FB | Voltage feedback input | 1.204V nominal regulation point; closed-loop control of output voltage via transformer secondary sensing |
| VREF | Internal 5V reference output | Supplies up to 18mA; decoupled with 1µF ceramic; used for DPRG, SPRG, and ADLY/PDLY biasing |
| UVLO | System undervoltage lockout input | 5.0V threshold with programmable hysteresis; sinks 10µA to set turn-on/off voltages via resistor divider |
| SS | Soft-start timing capacitor | Capacitor to GND controls ramp rate of current command (LTC3722-1); initiates restart on fault |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive ZVS with DirectSense™ | Eliminates external timing calibration; maintains ZVS across line/load/temperature with no trim components |
| Programmable synchronous rectifier timing | Single resistor (SPRG–GND) sets turn-off delay for OUTE/OUTF - optimizes secondary-side FET conduction loss |
| Integrated 5V reference + LDO | Stable 5V/18mA output with ±1.5% accuracy - powers external bias networks and eliminates need for discrete reference |
| Low start-up current (230µA) | Enables direct startup from high-impedance auxiliary windings or low-power bias supplies |
| Leading edge blanking (RLEB) | 40–310ns programmable blanking window - suppresses CS noise during MOSFET switching transitions |
| Hiccup-mode short-circuit protection | Auto-retry shutdown on sustained overload - prevents thermal runaway during output faults |
Applications
| Telecom Rectifier Modules | Industrial 48V Intermediate Bus Converters |
|---|---|
|
Use Scenario: 36–72V input telecom rectifier delivering 12V/20A (240W) to distributed loads in central office equipment. IC Role / Device Role / Timing Role: Primary-side ZVS full-bridge controller managing phase-shifted PWM, adaptive delay, and synchronous rectifier timing. Use Value: Achieves >95% efficiency at full load by eliminating body-diode conduction loss and enabling soft-switching across 10–100% load range. |
Use Scenario: High-reliability 48V intermediate bus converter powering FPGA, ASIC, and DSP subsystems in factory automation controllers. IC Role / Device Role / Timing Role: Full-bridge phase modulator with integrated gate drivers and thermal-hardened operation up to 150°C junction. Use Value: Sustains stable regulation and ZVS performance in sealed enclosures with limited airflow, reducing cooling requirements and system footprint. |
| Server PSU Main Converter | High-Temp Industrial Power Supplies |
|
Use Scenario: Primary-stage DC/DC converter in 1U server power supply operating from 54V backplane to generate 12V main rail. IC Role / Device Role / Timing Role: Peak current mode controller with programmable slope compensation and cycle-by-cycle current limiting. Use Value: Provides fast transient response and robust overcurrent protection without external current-sense amplifiers or compensation ICs. |
Use Scenario: Power supply for downhole oilfield electronics exposed to ambient temperatures exceeding 125°C. IC Role / Device Role / Timing Role: High-junction-temperature phase-shift controller with guaranteed 150°C operation and extended reliability life. Use Value: Eliminates derating or forced cooling in harsh environments, enabling compact, maintenance-free power designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar full-bridge phase-shift controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3895PW | Voltage-mode only; no adaptive ZVS; 125°C max junction; no integrated VREF or synchronous rectifier timing | Requires external ZVS timing circuitry and reference; less suited for high-temp or low-component-count designs | Select UCC3895PW only if legacy voltage-mode design exists and thermal margin exceeds 25°C |
| LTC3722IGN-1#PBF | Same functionality but rated for –40°C to 85°C junction; lower max operating temperature; identical pinout and electrical specs | Valid for commercial/industrial ambient environments but not extended-temperature deployments | Choose LTC3722IGN-1#PBF where board-level thermal management ensures TJ ≤ 85°C |
Compared with UCC3895PW and LTC3722IGN-1#PBF, the LTC3722HGN-1#PBF uniquely combines guaranteed 150°C operation, adaptive ZVS, and integrated synchronous rectifier timing - enabling higher power density and simplified BOM in thermally constrained telecom and industrial systems.
Availability
LTC3722HGN-1#PBF is available at Aetrix Electronics and suitable for telecom rectifier modules, industrial 48V intermediate bus converters, and server PSU main converters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3722HGN-1#PBF 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 (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.
The LTC3722 product line delivers advanced phase-shift PWM controllers for zero-voltage-switched full-bridge topologies - designed specifically for high-efficiency, high-reliability infrastructure power systems in telecom, datacenter, and industrial settings.
FAQ
What is the maximum junction temperature specification for the LTC3722HGN-1#PBF?
The LTC3722HGN-1#PBF is fully specified and guaranteed over a junction temperature range of –40°C to 150°C. This rating is explicitly documented in the Absolute Maximum Ratings and Electrical Characteristics tables of the official Analog Devices datasheet Rev C, distinguishing it from E- and I-grade variants limited to 85°C. Thermal design must ensure θJA = 100°C/W does not exceed this limit under worst-case load and ambient conditions.
Does the LTC3722HGN-1#PBF support both current mode and voltage mode control?
No - the LTC3722HGN-1#PBF implements peak current mode control only, as indicated by its "-1" suffix and confirmed by the presence of RLEB (leading edge blanking) and CS-based slope compensation circuitry. The "-2" variant (e.g., LTC3722HGN-2#PBF) uses voltage mode control and omits RLEB. Pin compatibility exists between -1 and -2 versions, but control architecture and associated external components differ.
How is adaptive ZVS implemented on the LTC3722HGN-1#PBF?
The LTC3722HGN-1#PBF implements adaptive ZVS using three dedicated pins: SBUS (bus voltage sense), ADLY (active leg delay), and PDLY (passive leg delay). SBUS is connected to a resistor divider from VIN to set a 1.5V reference; ADLY and PDLY monitor bridge-leg node voltages to dynamically adjust MOSFET turn-on timing based on real-time bus voltage and load conditions - eliminating fixed-timing errors across line and load variations.
What is the function of the SPRG pin on the LTC3722HGN-1#PBF?
The SPRG pin on the LTC3722HGN-1#PBF sets the turn-off delay for synchronous rectifier drivers OUTE and OUTF. A resistor connected between SPRG and GND programs this delay - typically 100kΩ yields ~200ns - ensuring optimal dead-time control to prevent shoot-through while minimizing conduction loss in secondary-side FETs. This eliminates need for external timing logic or gate-delay ICs.
Can the LTC3722HGN-1#PBF operate without an external gate driver IC?
The LTC3722HGN-1#PBF provides six ±50mA gate drivers (OUTA–F) but cannot directly drive high-capacitance power MOSFETs due to limited peak current and lack of level-shifting. It is designed to interface with external gate drivers such as LTC4440 (for high-side) and LTC3901 (for synchronous rectifiers). Attempting direct FET drive risks insufficient dV/dt, slow switching, and thermal stress on the LTC3722HGN-1#PBF outputs.
LTC3722HGN-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Full-Bridge
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 10.25V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- 98.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Ramp, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC3722HGN-1#PBF FAQ
1.How can I place an order for LTC3722HGN-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3722HGN-1#PBF 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 LTC3722HGN-1#PBF reliable?
The price and inventory of LTC3722HGN-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3722HGN-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3722HGN-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3722HGN-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3722HGN-1#PBF?
LTC3722HGN-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3722HGN-1#PBF 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 LTC3722HGN-1#PBF?
For technical support, including LTC3722HGN-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3722HGN-1#PBF requirements.
6.How does Aetrix verify that LTC3722HGN-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3722HGN-1#PBF 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 LTC3722HGN-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3722HGN-1#PBF?
All LTC3722HGN-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3722HGN-1#PBF, 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 LTC3722HGN-1#PBF part is unused and in its original packaging.
Return procedure for LTC3722HGN-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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