My Inquiry
My Account
Analog Devices Inc. LTC3901EGN#TRPBF
- Part No.:
- LTC3901EGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3901EGN#TRPBF.pdf
- Description:
- IC GATE DRVR LOW-SIDE 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3901EGN#TRPBF from Analog Devices (formerly Linear Technology) is a secondary-side N-channel synchronous MOSFET driver for isolated push-pull and full-bridge DC/DC converters. It drives two external MOSFETs (ME/MF), accepts bipolar transformer-coupled SYNC input, features programmable timeout, reverse inductor current sensing via RDS(ON), and operates from 4.5V to 11V VCC. Used in 48V telecom power supplies and industrial isolated step-down converters.
For engineers reviewing the LTC3901EGN#TRPBF datasheet, LTC3901EGN#TRPBF pinout, LTC3901EGN#TRPBF application, or LTC3901EGN#TRPBF equivalent, key selection criteria include its 15ns rise/fall time at 5V/4700pF, ±1.4V SYNC threshold with hysteresis, 10.5mV current sense threshold with 0.33%/°C TC matching MOSFET RDS(ON), UVLO at 4.1V, and 16-lead SSOP package compatibility with high-density isolated power layouts.
Technical Context
The LTC3901EGN#TRPBF implements dual-channel gate drive logic synchronized to primary-side controller via transformer-coupled bipolar SYNC signal, with independent ME/MF outputs and dedicated differential current sense inputs (CSE±, CSF±) for reverse-current protection. Its sequential logic monitors SYNC polarity transitions to prevent double-pulse faults.
It integrates a programmable timeout circuit using external RTMR/CTMR, where timeout threshold is fixed at 0.2×VCC for voltage-independent timing, and clamps TIMER pin at ~0.5×VCC during missing SYNC events. Current sense comparators activate 250ns after respective driver turn-on to avoid switching noise false triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 4.5V to 11V - powers internal logic; enables direct use of rectified secondary winding output without LDO. |
| SYNC Input Threshold | ±1.4V with ±0.2V hysteresis - robust detection of transformer-coupled bipolar pulses across temperature. |
| Current Sense Threshold | 10.5mV with +0.33%/°C TC - matches MOSFET RDS(ON) drift to maintain consistent reverse-current trip point. |
| Rise/Fall Time | 15ns at VCC=5V, CL=4700pF - supports high-frequency (>1MHz) synchronous rectification with minimal dead-time loss. |
| UVLO Threshold | 4.1V rising edge, 0.5V hysteresis - prevents erratic operation during VCC ramp-up and ensures clean shutdown below safe logic level. |
| Timeout Accuracy | Programmable via RTMR/CTMR; independent of VCC due to 0.2×VCC threshold - enables precise match to primary switching period. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and telecom power supply environments. |
Pinout & Package
16-lead narrow plastic SSOP (GN package), 0.15mm max height, 0.65mm pitch. Thermal pad not present; θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVCC (1) | Driver supply input | Provides power to ME/MF gate drivers; bypass to PGND with 4.7µF low-ESR capacitor near pin. |
| ME (2,3) | Driver output A | Drives gate of external N-MOSFET ME; pull-up/pull-down resistance 0.9–1.6Ω supports fast switching into large gate capacitance. |
| PGND (4,13) | Power ground return | Low-impedance return path for ME/MF driver currents; must connect directly to MOSFET source nodes. |
| CSE– (5), CSE+ (6) | Differential current sense for ME | Monitors VDS of ME via external resistors; comparator activates 250ns after ME turn-on to avoid noise. |
| TIMER (7) | Programmable timeout input | Accepts RC network; internal 0.2×VCC threshold enables VCC-independent timeout; clamp at 0.5×VCC limits discharge error. |
| GND (8,10) | Signal ground reference | Reference for internal logic and comparators; must tie to PGND at single point adjacent to IC to minimize ground bounce. |
| SYNC (9) | Bipolar synchronization input | Detects positive/negative pulses from gate-drive transformer; dual comparators with ±1.4V thresholds ensure reliable edge detection. |
| CSF– (11), CSF+ (12) | Differential current sense for MF | Functionally identical to CSE±; independently monitors MF VDS to protect against reverse inductor current. |
| MF (14,15) | Driver output B | Drives gate of external N-MOSFET MF; matched timing and drive strength to ME for balanced push-pull operation. |
| VCC (16) | Logic supply input | Powers internal circuitry except drivers; bypass to GND with 1µF capacitor; UVLO triggers at 4.1V. |
Key Features
| Feature | Design Value |
|---|---|
| Transformer-synchronized dual gate drive | Eliminates optocoupler or digital isolator in secondary-side control, reducing component count and propagation delay. |
| Reverse inductor current protection | Dual differential comparators detect current reversal through MOSFET RDS(ON), turning off affected switch within nanoseconds to prevent energy buildup. |
| Programmable timeout with VCC-independent timing | External RTMR/CTMR sets timeout to match primary switching period; 0.2×VCC threshold removes supply dependency. |
| SYNC sequence monitor | Sequential logic disables both drivers on consecutive same-polarity SYNC pulses, preventing latch-up during startup or fault conditions. |
| Integrated UVLO with hysteresis | Shuts down drivers cleanly when VCC drops below 4.1V; 0.5V hysteresis prevents oscillation near threshold during brownout. |
Applications
| 48V Telecom Power Supplies | Isolated Industrial DC/DC Converters |
|---|---|
Use Scenario: Secondary-side rectification in 48V input telecom rectifiers delivering 12V/24V outputs with >90% efficiency. IC Role / Device Role / Timing Role: Synchronous rectifier driver replacing Schottky diodes; ME/MF outputs precisely timed to primary-side push-pull switching edges via transformer-coupled SYNC. Use Value: Reduces conduction losses by >50% vs. diode rectification at 20A output, enabling smaller heatsinks and higher power density in NEBS-compliant systems. |
Use Scenario: Isolated 24–72V input to 5V/3.3V distributed power rails in PLCs and motor drives. IC Role / Device Role / Timing Role: Full-bridge synchronous driver accepting bipolar SYNC from primary controller; provides independent ME/MF gate control with reverse-current shutdown. Use Value: Enables continuous-conduction-mode operation down to light loads via adjustable current sense threshold, improving no-load efficiency by 2–3%. |
| Automotive Onboard Chargers (OBC) | High-Density Server PSU Modules |
Use Scenario: Secondary-side rectification in bidirectional AC/DC OBCs with 400V–800V battery interface and isolated 12V auxiliary rail. IC Role / Device Role / Timing Role: Push-pull synchronous driver with programmable timeout; handles burst-mode transitions during low-power standby without MOSFET overstress. Use Value: Timeout and current sense features prevent drain voltage flyback damage during rapid load transients and soft-start sequences. |
Use Scenario: High-frequency (500kHz–1MHz) isolated DC/DC modules for AI accelerators requiring <1% output ripple and <10ms transient response. IC Role / Device Role / Timing Role: Dual-channel gate driver with 15ns edge rates and <120ns propagation delay; synchronizes to primary controller with sub-ns jitter tolerance. Use Value: Supports tight dead-time control and fast dynamic response, reducing output filter size by 30% versus diode-based designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectifier driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5109BMAX/NOPB | Single-channel high-side driver; no SYNC polarity monitoring, no reverse-current sensing, no programmable timeout. | Suitable only for non-isolated, self-clocking topologies; requires external logic for push-pull sequencing. | Select only if driving single MOSFET in non-isolated buck or half-bridge with external timing control. |
| UCC27282DRCR | Dual-channel bootstrap driver; no transformer SYNC interface, no differential current sense, no UVLO hysteresis. | Designed for high-side/lower-side gate drive in non-isolated converters; lacks isolation barrier synchronization capability. | Choose for cost-sensitive, non-isolated applications where transformer coupling is impractical. |
Compared with LM5109BMAX/NOPB and UCC27282DRCR, the LTC3901EGN#TRPBF uniquely integrates transformer-coupled bipolar SYNC decoding, dual reverse-current protection, and VCC-independent timeout-making it the only solution qualified for high-reliability isolated push-pull and full-bridge rectification without additional support circuitry.
Availability
LTC3901EGN#TRPBF is available at Aetrix Electronics and suitable for 48V telecom power supplies, isolated industrial DC/DC converters, and automotive onboard chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3901EGN#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3901EGN#TRPBF belongs to Linear's isolated power controller family, designed specifically for high-efficiency secondary-side synchronous rectification in telecom, industrial, and automotive isolated DC/DC converters.
FAQ
What is the function of the TIMER pin on the LTC3901EGN#TRPBF?
The TIMER pin on the LTC3901EGN#TRPBF accepts an external R-C network to program a timeout period that disables both ME and MF drivers if the SYNC signal is missing or invalid. The internal timeout threshold is 0.2×VCC, making timing independent of supply voltage. The LTC3901EGN#TRPBF resets the timer on every SYNC transition; if reset pulses stop, the TIMER voltage rises until it exceeds the threshold, forcing driver shutdown. This protects external MOSFETs during primary controller faults or power-down sequences.
How does the LTC3901EGN#TRPBF handle reverse inductor current?
The LTC3901EGN#TRPBF uses two independent differential current sense comparators (CSE± for ME, CSF± for MF) that monitor the voltage drop across the MOSFETs' RDS(ON). When inductor current reverses and causes the sensed voltage to exceed 10.5mV, the corresponding driver turns off within nanoseconds. The 0.33%/°C temperature coefficient of the threshold matches typical MOSFET RDS(ON) drift, ensuring consistent protection across –40°C to +85°C. The LTC3901EGN#TRPBF activates each comparator 250ns after its associated driver turns on to avoid switching noise false triggers.
Can the LTC3901EGN#TRPBF be used in full-bridge topologies?
Yes, the LTC3901EGN#TRPBF is explicitly qualified for full-bridge converter applications, as confirmed in its datasheet Figure 10 and Application Information section. Its dual-driver architecture, transformer-coupled SYNC input, and independent current sense channels operate identically in full-bridge mode as in push-pull. The ME and MF outputs drive the two synchronous rectifier MOSFETs on the secondary side, while the SYNC signal is derived from primary-side gate-drive transformers. The LTC3901EGN#TRPBF's timeout, UVLO, and sequence-monitoring protections remain fully functional in full-bridge configurations.
What is the purpose of the dual GND and PGND pins on the LTC3901EGN#TRPBF?
The LTC3901EGN#TRPBF separates signal ground (GND, pins 8 and 10) from power ground (PGND, pins 4 and 13) to minimize noise coupling between high-current driver return paths and sensitive analog circuits. PGND carries peak currents from ME/MF drivers and must connect directly to MOSFET source nodes with low-inductance traces. GND serves as reference for internal comparators, logic, and current sense inputs. The datasheet mandates tying GND to PGND at a single point adjacent to the LTC3901EGN#TRPBF to prevent ground bounce from corrupting current sense accuracy or SYNC detection.
Does the LTC3901EGN#TRPBF require external components for basic operation?
Yes, the LTC3901EGN#TRPBF requires several external components for reliable operation: bypass capacitors (1µF on VCC, 4.7µF on PVCC), RC network on TIMER pin for timeout programming, series resistors on CSE±/CSF± for current sensing, and a gate-drive transformer for SYNC signal coupling. The datasheet provides design equations for resistor values based on MOSFET RDS(ON), transformer turns ratio, and input voltage. These components are mandatory-not optional-for reverse-current protection, timing control, and noise-immune synchronization. The LTC3901EGN#TRPBF cannot function without them.
LTC3901EGN#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
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 11V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- 2A, 2A
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 15ns, 15ns
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC3901EGN#TRPBF FAQ
1.How can I place an order for LTC3901EGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3901EGN#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 LTC3901EGN#TRPBF reliable?
The price and inventory of LTC3901EGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3901EGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3901EGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3901EGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3901EGN#TRPBF?
LTC3901EGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3901EGN#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 LTC3901EGN#TRPBF?
For technical support, including LTC3901EGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3901EGN#TRPBF requirements.
6.How does Aetrix verify that LTC3901EGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3901EGN#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 LTC3901EGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3901EGN#TRPBF?
All LTC3901EGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3901EGN#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 LTC3901EGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC3901EGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3901EGN#TRPBF Tags
-
ZXGD3009E6TA
Diodes Incorporated
-
1EDN7512BXTSA1
Infineon Technologies
-
UCC27517DBVR
Texas Instruments
-
MCP1416T-E/OT
Microchip Technology
-
MCP1402T-E/OT
Microchip Technology
-
MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
-
IRS2005STRPBF
Infineon Technologies
-
IRS2008STRPBF
Infineon Technologies
-
IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
