My Inquiry
My Account
Analog Devices Inc. LT3692AEFE#TRPBF
- Part No.:
- LT3692AEFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3692AEFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A DL 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3692AEFE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic dual-channel current-mode PWM step-down DC/DC converter with two internal 3.8A NPN power switches, operating from 3V to 36V input and delivering up to 3.5A per channel. It features independent shutdown, soft-start, UVLO, programmable current limit, and 180° antiphase switching for reduced input ripple. Used in automotive distributed supplies and multi-rail industrial power systems.
For engineers reviewing the LT3692AEFE#TRPBF datasheet, LT3692AEFE#TRPBF pinout, LT3692AEFE#TRPBF application, or LT3692AEFE#TRPBF equivalent, key selection criteria include its 38-pin TSSOP exposed-pad package, –40°C to 125°C junction temperature rating, dual-channel synchronization capability, and integrated die temperature monitoring via TJ pin.
Technical Context
The LT3692AEFE#TRPBF implements independent current-mode control per channel with separate VC error amplifier outputs, ILIM-programmable peak inductor current (2A–4.8A), and RT/SYNC-synchronized switching from 250kHz to 2.5MHz. Each channel includes dedicated CMPI comparators (720mV threshold, 60mV hysteresis) for power-good signaling and antiphase operation maintained across full frequency range.
It supports flexible sequencing via SHDN1 (global enable) and SHDN2 (channel 2 only), uses BST bootstrap capacitors for high-side NPN drive, and integrates a die-temperature sensor (TJ = 250mV at 25°C, 10mV/°C slope) with ±100mV error over –40°C to 125°C. Minimum on-time is 140ns, enabling high VIN-to-VOUT ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 36V continuous; withstands 60V transients - enables direct battery connection in 24V automotive and industrial systems. |
| Output Current per Channel | Up to 3.5A - supports high-current rails like FPGA core or processor I/O supplies without external MOSFETs. |
| Switching Frequency Range | 250kHz to 2.5MHz - adjustable via RT/SYNC resistor or external clock; allows optimization of size vs. efficiency. |
| Feedback Reference Voltage | 806mV ±16mV - precise regulation point enabling accurate output setting with standard resistor dividers. |
| Junction Temperature Range | –40°C to 125°C - qualified for under-hood automotive and harsh industrial environments. |
| Package Type | 38-lead plastic TSSOP with exposed pad - provides thermal resistance θJC = 3°C/W for reliable high-power operation. |
| Quiescent Current (Shutdown) | <10µA total - enables ultra-low-power standby in always-on systems such as telematics or sensor nodes. |
Pinout & Package
LT3692AEFE#TRPBF is housed in a 38-lead plastic TSSOP package with exposed thermal pad (pin 39 = GND). The package requires soldering of the exposed pad to PCB ground plane for thermal and electrical integrity (θJA = 17.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST1/BST2 | Bootstrap supply for channel 1/2 high-side NPN switch | Must be decoupled with 0.1µF ceramic capacitor to respective SW pin; voltage ≥ VIN + 1.6V required for full saturation. |
| SHDN1/SHDN2 | Channel 1/2 shutdown control inputs | SHDN1 globally disables both channels; SHDN2 controls only channel 2; thresholds at 1.32V typical. |
| FB1/FB2 | Negative input to error amplifier per channel | Regulated to 806mV; bias current flows out - sets output voltage via resistive divider from VOUT to GND. |
| ILIM1/ILIM2 | Peak current limit programming inputs | Driven by 12µA internal current source; 0–1.5V range sets 4.8A–2A current limit - enables precise overcurrent protection. |
| RT/SYNC | Frequency setting / external synchronization input | Accepts resistor (250kHz–2.5MHz) or external clock (250kHz–2MHz); rising-edge synchronized with automatic slope compensation. |
| TJ | Die temperature monitor output | 250mV at 25°C, 10mV/°C slope - enables real-time thermal management without external sensors. |
| CLKOUT | Synchronized clock output | 0–2.5V square wave; mirrors master oscillator frequency and phase - used to synchronize multiple LT3692A devices. |
| GND (Pin 39) | Power and signal ground reference | Exposed pad must be soldered to large PCB copper area; serves as sole ground return for both channels and thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-channel control | Each channel has dedicated SHDN, SS, FB, ILIM, CMPI/CMPO, and VC pins - enables asymmetric rail generation and custom sequencing. |
| Antiphase 180° switching | Maintains fixed 180° phase shift between channels across full 250kHz–2.5MHz range - cuts input capacitor RMS current by ~30% vs. in-phase operation. |
| Programmable current limit | ILIM pin accepts 0–1.5V to set peak inductor current from 2A to 4.8A - eliminates need for external sense resistors or current transformers. |
| Dual-frequency flexibility | Channel 1 frequency can be divided by 1, 2, 4, or 8 relative to master clock - allows optimizing component size per rail (e.g., 550kHz for 3.3V, 2.2MHz for 1.2V). |
| FMEA-compliant package | 38-pin TSSOP with exposed pad meets automotive functional safety requirements - supports traceable thermal performance and robust grounding. |
Applications
| Automotive ADAS Power Supply | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Dual-rail power for radar processor (1.2V core) and interface (3.3V I/O) in compact front-end module. IC Role / Device Role / Timing Role: Primary dual-buck regulator providing tightly tracked, sequenced, and monitored outputs with thermal derating. Use Value: Antiphase operation reduces input capacitance by 40%; TJ pin enables closed-loop thermal throttling before junction exceeds 125°C. |
Use Scenario: Distributed 5V and 3.3V supplies across modular backplane with strict EMI limits. IC Role / Device Role / Timing Role: Centralized dual-channel DC/DC controller synchronizing to system clock to suppress beat frequencies. Use Value: RT/SYNC pin accepts 1MHz system clock; CLKOUT drives downstream regulators - eliminates switching noise peaks in narrow bands. |
| Medical Imaging Sensor Array | Telecom Remote Radio Unit |
|
Use Scenario: Low-noise, low-ripple power for analog front-end ADCs and digital logic in portable ultrasound probe. IC Role / Device Role / Timing Role: Dual-output buck with independent soft-start and PG signaling ensures clean power-up sequence for mixed-signal ASICs. Use Value: CMPI-to-FB connection generates accurate power-good within 90% of target; SS pins tied for simultaneous ramp-up. |
Use Scenario: Compact, high-reliability 12V-to-3.3V/1.8V conversion in outdoor 5G RRH with wide ambient temperature swing. IC Role / Device Role / Timing Role: Dual-channel buck with extended temperature grade (–40°C to 125°C) and transient-robust OVLO (39V typical). Use Value: Withstands 60V load-dump transients; 140ns minimum on-time supports 12V→1.8V conversion at 2MHz without pulse-skipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3692AEUH#TRPBF | Same silicon, 32-lead 5mm × 5mm QFN package; θJC = 1.5°C/W vs. 3°C/W; no NC pins. | Better thermal performance in space-constrained layouts; less PCB area than TSSOP but requires more complex reflow profile. | Select when board space is limited and thermal headroom is critical; verify layout compatibility with QFN footprint. |
| MPQ4436AGL-AEC1-P | Monolithic dual 3.5A buck; AEC-Q100 Grade 1 (–40°C to 125°C); fixed 500kHz/2.2MHz dual-frequency option; no TJ pin or DIV function. | Lacks die temperature monitoring and channel-frequency division; offers automotive qualification out-of-box. | Select when AEC-Q100 documentation is mandatory and thermal monitoring is handled externally; not drop-in due to different pinout and feature set. |
Compared with LT3692AEFE#TRPBF, the LT3692AEUH#TRPBF delivers superior thermal resistance in a smaller footprint but lacks NC pins for routing flexibility, while the MPQ4436AGL-AEC1-P provides automotive qualification without die-temperature sensing or programmable channel division.
Availability
LT3692AEFE#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS systems, industrial PLCs, medical imaging equipment, and telecom remote radio units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3692AEFE#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 its high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LT3692A product line was designed for demanding dual-rail power applications requiring tracking, sequencing, thermal monitoring, and high transient immunity - especially in automotive, industrial, and medical systems where reliability and precision are non-negotiable.
FAQ
What is the maximum supported switching frequency for LT3692AEFE#TRPBF?
The LT3692AEFE#TRPBF supports a maximum switching frequency of 2.5MHz when the RT/SYNC pin voltage exceeds 950mV, typically achieved with a 100kΩ resistor to ground. At this frequency, minimum on-time (140ns) and off-time (200ns) ensure stable operation even at high VIN-to-VOUT ratios. Operation above 2.5MHz is not guaranteed and may cause cycle skipping or regulation loss in LT3692AEFE#TRPBF.
How does the TJ pin on LT3692AEFE#TRPBF function, and what accuracy can be expected?
The TJ pin on LT3692AEFE#TRPBF outputs a voltage proportional to die temperature: 250mV at 25°C with a slope of 10mV/°C. Over the –40°C to 125°C range, TJ error is specified as ±100mV, corresponding to ±10°C absolute accuracy. This enables real-time thermal monitoring without external sensors, and the LT3692AEFE#TRPBF datasheet confirms TJ output remains valid during normal operation and thermal shutdown events.
Can LT3692AEFE#TRPBF operate with only one channel enabled?
Yes - LT3692AEFE#TRPBF supports single-channel operation. Driving SHDN1 high enables both channels; pulling SHDN2 low while keeping SHDN1 high disables only channel 2. Channel 1 continues regulating independently. However, VIN1 must remain above 2.8V (UVLO threshold) to power shared internal circuitry including oscillator and references - a requirement explicitly confirmed for LT3692AEFE#TRPBF in the datasheet's Block Diagram section.
What is the purpose of the DIV pin on LT3692AEFE#TRPBF, and how is it configured?
The DIV pin on LT3692AEFE#TRPBF sets the frequency division ratio for channel 1 relative to the master clock: 1×, 2×, 4×, or 8×. An internal 12µA current source pulls the pin high; connecting a resistor from DIV to GND sets the voltage (0.5V, 1.0V, or 1.5V thresholds) to select the ratio. This allows channel 1 to run at lower frequency for higher efficiency on high-current rails while channel 2 runs at higher frequency for compact filtering - a capability verified in LT3692AEFE#TRPBF's Applications Information and Pin Functions sections.
Does LT3692AEFE#TRPBF support power-good signaling, and how is it implemented?
Yes - LT3692AEFE#TRPBF provides per-channel power-good signaling via CMPI and CMPO pins. Connecting CMPI to FB creates a comparator that asserts when output reaches 90% of regulation (720mV threshold). CMPO sinks current when asserted, allowing open-collector wired-OR of both channels into a single system PGOOD signal. This implementation is documented in the LT3692AEFE#TRPBF Pin Functions and Typical Application schematics, with hysteresis (60mV) ensuring noise immunity.
LT3692AEFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 110kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LT3692AEFE#TRPBF FAQ
1.How can I place an order for LT3692AEFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3692AEFE#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 LT3692AEFE#TRPBF reliable?
The price and inventory of LT3692AEFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3692AEFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3692AEFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3692AEFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3692AEFE#TRPBF?
LT3692AEFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3692AEFE#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 LT3692AEFE#TRPBF?
For technical support, including LT3692AEFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3692AEFE#TRPBF requirements.
6.How does Aetrix verify that LT3692AEFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3692AEFE#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 LT3692AEFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3692AEFE#TRPBF?
All LT3692AEFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3692AEFE#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 LT3692AEFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3692AEFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3692AEFE#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
