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Analog Devices Inc. LTC3723EGN-1#TRPBF
- Part No.:
- LTC3723EGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3723EGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR PUSH-PULL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
LTC3723EGN-1#TRPBF from Analog Devices (formerly Linear Technology) is a synchronous push-pull PWM controller IC designed for isolated DC/DC converters. It implements peak current mode control with programmable slope compensation and leading edge blanking, delivers 1.5A sink / 1A source gate drive on DRVA/DRVB, supports up to 1MHz oscillator frequency (500kHz switching), and operates across –40°C to 85°C in telecom and infrastructure power systems.
For engineers reviewing the LTC3723EGN-1#TRPBF datasheet, LTC3723EGN-1#TRPBF pinout, LTC3723EGN-1#TRPBF application, or LTC3723EGN-1#TRPBF equivalent, key selection considerations include its 16-pin SSOP package, adjustable dead-time via DPRG, system UVLO programming on UVLO pin, and synchronous rectifier timing control via SPRG and SDRB/SDRA outputs.
Technical Context
The LTC3723EGN-1#TRPBF integrates dual high-current totem-pole drivers (DRVA/DRVB) switching at half the CT oscillator frequency, with independently programmable dead-time using an external resistor on DPRG. Its peak current mode architecture uses CS as the current sense input with 300mV pulse-by-pulse limit threshold and internal slope compensation sourced from the CT ramp.
It features a precision 5.0V reference (±1% initial accuracy), 1.2V FB regulation point, 10.25V VCC UVLO with 4.2V hysteresis, and low 145µA start-up current. Synchronous rectifier timing is decoupled via SPRG (turn-off delay) and RLEB (leading edge blanking), enabling optimization of secondary-side conduction losses in isolated topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 10.25V turn-on ensures reliable startup from loosely regulated auxiliary windings without premature oscillation. |
| Max Oscillator Frequency | 1MHz (CT-based) enables 500kHz push-pull switching - critical for compact magnetics in high-density telecom PSUs. |
| DRVA/DRVB Drive Strength | 1.5A sink / 1A source capability directly drives large MOSFET gates without external buffers in 50–200W isolated converters. |
| CS Current Limit Threshold | 300mV nominal pulse-by-pulse threshold provides fast overcurrent response with minimal sensing resistor loss (e.g., 3mΩ @ 100A). |
| Reference Accuracy | ±1% (4.925V–5.075V) over temperature ensures stable biasing for error amplifier and UVLO circuitry across industrial range. |
| Operating Temperature | –40°C to +85°C ambient rating qualifies it for base station power modules and industrial distributed power architectures. |
| Package | 16-pin SSOP (GN) with 0.65mm pitch - compatible with standard reflow profiles and automated optical inspection. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 5.0mm × 6.2mm body, 0.65mm lead pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | 5.0V precision reference output | Supplies 18mA max; used to bias DPRG, RLEB, SPRG, and external divider networks - requires 0.47µF ceramic decoupling. |
| SDRB (Pin 2) | Synchronous rectifier driver B | 50mA sink/source output timed relative to DRVB; turn-off delay set by SPRG resistor - enables zero-voltage switching on secondary side. |
| SDRA (Pin 3) | Synchronous rectifier driver A | 50mA sink/source output timed relative to DRVA; independent from SDRB - supports asymmetric secondary configurations. |
| DRVB (Pin 4) | Primary-side push-pull driver B | 1.5A sink / 1A source totem pole; 10ns rise/fall into 1nF load - minimizes MOSFET switching losses in centertapped transformer designs. |
| VCC (Pin 5) | Supply input & shunt regulator | Self-regulates at 10.3V; sinks up to 40mA - eliminates need for external LDO; bypass with ≥1µF ceramic for transient immunity. |
| DRVA (Pin 6) | Primary-side push-pull driver A | 1.5A sink / 1A source totem pole, 180° out-of-phase with DRVB - forms complementary drive pair for balanced transformer excitation. |
| GND (Pin 7) | Analog/digital ground reference | Star-point connection for VIN/VREF bypass caps; mandatory ground plane use prevents noise coupling into CS and COMP nodes. |
| CT (Pin 8) | Oscillator timing capacitor node | 2.35V p-p ramp amplitude; sets frequency via CT = 1/(14.8k·FOSC); requires ±5% low-ESR ceramic for stability. |
| DPRG (Pin 9) | Dead-time programming input | 2V nominal voltage; resistor to VREF programs 90–300ns dead-time - prevents shoot-through during maximum duty cycle operation. |
| CS (Pin 10) | Current sense comparator input | Accepts voltage from sense resistor or current transformer; hosts 300mV pulse-by-pulse and 600mV shutdown comparators. |
| COMP (Pin 11) | Error amplifier output | Drives PWM modulator; open-loop gain 70–90dB; 400µA source / 2mA sink - interfaces directly with optocoupler feedback loops. |
| RLEB (Pin 12) | Leading edge blanking timing | 10k–100k resistor to GND sets 40–310ns blanking window - suppresses gate-drive-induced transients on CS during MOSFET turn-on. |
| FB (Pin 13) | Feedback voltage input | 1.2V regulation point; −0.3V to 2.5V input range - connects to resistive divider from isolated output for tight voltage regulation. |
| SS (Pin 14) | Soft-start timing capacitor | 13µA charging current ramps COMP voltage linearly; discharges during fault - prevents inrush current in hot-plug applications. |
| UVLO (Pin 15) | System undervoltage lockout | 5.0V threshold with 10µA hysteresis current - enables precise DC feed enable/disable using resistor divider from main input bus. |
| SPRG (Pin 16) | Synchronous rectifier turn-off delay | Resistor to GND sets delay referenced to DRVA/DRVB edges - optimizes body diode conduction time to minimize reverse recovery losses. |
Key Features
| Feature | Design Value |
|---|---|
| Peak current mode control | Enables fast transient response and inherent current limiting in isolated push-pull converters without external slope compensation circuitry. |
| Programmable dead-time (DPRG) | Adjusts minimum off-time between DRVA and DRVB outputs from 90ns to 300ns - prevents cross-conduction in high-frequency, high-power designs. |
| Independent synchronous rectifier timing (SPRG/RLEB) | Allows separate optimization of primary-side blanking and secondary-side turn-off delays - maximizes efficiency across load and line variations. |
| Low 145µA start-up current | Permits use of high-value (e.g., 430kΩ) trickle-charge resistors from AC/DC front-ends - reduces standby power and simplifies bias supply design. |
| Integrated 10.3V shunt regulator (VCC) | Eliminates need for external bias regulator; regulates VCC while sinking up to 40mA - supports direct connection to auxiliary transformer windings. |
| 1.2V precision FB reference | Provides accurate output voltage setting point for optocoupler-based feedback; ±10mV variation over temperature ensures <±1% output regulation. |
Applications
| Telecom DC/DC Brick | Industrial Isolated Auxiliary Supply |
|---|---|
|
Use Scenario: 48V input telecom brick delivering 12V@20A with >93% efficiency in NEBS-compliant base station equipment. IC Role / Device Role / Timing Role: LTC3723EGN-1#TRPBF acts as primary-side push-pull controller, generating complementary 500kHz gate drives and synchronizing secondary-side MOSFETs via SDRB/SDRA. Use Value: Programmable dead-time and slope compensation maintain stability under wide input voltage swings (36–72V), while low start-up current enables cold-start from backup batteries. |
Use Scenario: 24V-to-5V/3.3V isolated auxiliary supply powering FPGA I/O banks and ADC references in factory automation PLCs. IC Role / Device Role / Timing Role: LTC3723EGN-1#TRPBF controls centertapped forward converter with synchronous rectification on secondary, using UVLO to coordinate startup with main 24V rail. Use Value: 1.2V FB reference and 5.0V VREF enable precise multi-rail sequencing; SS pin allows controlled soft-start to avoid brownout on shared 24V bus. |
| Server PSU Intermediate Bus Converter | Medical Imaging Power Module |
|
Use Scenario: 380V DC intermediate bus converter stepping down to 12V for server VRMs in data center rack power distribution units. IC Role / Device Role / Timing Role: LTC3723EGN-1#TRPBF manages push-pull topology with active clamp snubber, using CT synchronization to align switching with upstream PFC stage. Use Value: 16-pin SSOP footprint fits constrained PCB layouts; DPRG and SPRG pins allow fine-tuning of timing margins to meet CISPR-32 conducted EMI limits. |
Use Scenario: Isolated 24V-to-±15V dual-output supply for analog front-end amplifiers in MRI gradient coil drivers requiring ultra-low noise and high reliability. IC Role / Device Role / Timing Role: LTC3723EGN-1#TRPBF serves as isolated controller with reinforced insulation barrier, using RLEB to eliminate current-sense glitches during high di/dt gradient pulses. Use Value: –40°C to +85°C rating and 125°C junction limit support extended thermal cycling; VREF output powers isolated op-amps without additional regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous push-pull controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC2897A | Voltage mode only; no slope compensation; fixed 100ns dead-time; 100V VCC rating vs. 10V for LTC3723EGN-1#TRPBF | Requires external slope generator for current mode; less flexible dead-time tuning; better suited for higher-input-voltage flyback/fwd | Select UCC2897A when operating above 60V input or when voltage-mode simplicity outweighs need for adaptive dead-time. |
| MAX5069A | Peak current mode with integrated 5V LDO; no programmable RLEB; 12-pin TQFN vs. 16-pin SSOP; lower 300kHz max frequency | Lacks independent synchronous rectifier timing; smaller package but no SPRG/RLEB adjustment; limited to <150W due to drive strength | Choose MAX5069A for space-constrained, lower-power (<100W) isolated supplies where synchronous timing flexibility is secondary to board area. |
Compared with UCC2897A and MAX5069A, the LTC3723EGN-1#TRPBF uniquely combines peak current mode control, fully programmable dead-time (DPRG), leading edge blanking (RLEB), and synchronous rectifier turn-off delay (SPRG) in a single 16-pin SSOP package - making it optimal for high-efficiency, thermally demanding telecom and industrial isolated converters requiring precise timing control.
Availability
LTC3723EGN-1#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure power systems, industrial distributed power architectures, and medical imaging power modules requiring stable component supply and long-term production continuity.
Supply support for LTC3723EGN-1#TRPBF 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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for all Linear power management ICs, including rigorous qualification and long-term product support.
The LTC3723EGN-1#TRPBF belongs to Linear's high-performance isolated controller family, engineered specifically for compact, high-efficiency push-pull and forward converters in telecom, industrial, and medical power systems.
FAQ
What is the function of the DPRG pin on the LTC3723EGN-1#TRPBF?
The DPRG pin on the LTC3723EGN-1#TRPBF programs the minimum dead-time between DRVA and DRVB outputs using an external resistor to VREF. With a nominal 2V bias, it adjusts dead-time from 90ns to 300ns - preventing shoot-through during maximum duty cycle operation in push-pull converters. This feature is essential for reliability at high switching frequencies and is unique to the LTC3723EGN-1#TRPBF among its class.
Does the LTC3723EGN-1#TRPBF support both current mode and voltage mode control?
No - the LTC3723EGN-1#TRPBF implements peak current mode control only, with programmable slope compensation and leading edge blanking. The voltage mode variant is the LTC3723-2 (e.g., LTC3723EGN-2#TRPBF). Confusing them risks incorrect loop compensation and instability; always verify the suffix "-1" or "-2" in the full part number LTC3723EGN-1#TRPBF.
How does the LTC3723EGN-1#TRPBF achieve low start-up current?
The LTC3723EGN-1#TRPBF achieves 145µA typical start-up current through optimized internal biasing and a dedicated low-leakage start-up path. This allows use of high-value (e.g., 430kΩ) resistors from AC/DC rectified inputs, minimizing standby power and enabling reliable cold-start from backup sources - a key advantage in telecom and industrial systems using the LTC3723EGN-1#TRPBF.
Can the LTC3723EGN-1#TRPBF be used in non-isolated topologies like forward converters?
Yes - the LTC3723EGN-1#TRPBF supports forward, half-bridge, and full-bridge topologies in addition to push-pull. Its 50% maximum duty cycle (reduced by programmed dead-time) suits two-transistor forward designs. Figure 6 in the datasheet shows LTC3723EGN-1#TRPBF paired with LTC4440 for this purpose, confirming validated use beyond isolated push-pull applications.
What is the purpose of the RLEB pin on the LTC3723EGN-1#TRPBF?
The RLEB pin on the LTC3723EGN-1#TRPBF sets the duration of leading edge blanking applied to the CS current sense signal, using a 10k–100kΩ resistor to GND to program 40–310ns blanking windows. This suppresses gate-drive-induced transients during MOSFET turn-on, preventing false overcurrent trips - a critical function for stable operation in high-di/dt isolated converters using the LTC3723EGN-1#TRPBF.
LTC3723EGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Push-Pull
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- Up to 10V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- 50%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Ramp, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC3723EGN-1#TRPBF FAQ
1.How can I place an order for LTC3723EGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3723EGN-1#TRPBF 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 LTC3723EGN-1#TRPBF reliable?
The price and inventory of LTC3723EGN-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3723EGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3723EGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3723EGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3723EGN-1#TRPBF?
LTC3723EGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3723EGN-1#TRPBF 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 LTC3723EGN-1#TRPBF?
For technical support, including LTC3723EGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3723EGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3723EGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3723EGN-1#TRPBF 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 LTC3723EGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3723EGN-1#TRPBF?
All LTC3723EGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3723EGN-1#TRPBF, 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 LTC3723EGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3723EGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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