My Inquiry
My Account
Analog Devices Inc. LT3692AHFE#TRPBF
- Part No.:
- LT3692AHFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3692AHFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A DL 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,837
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3692AHFE#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 antiphase switching at 180° phase shift to reduce output ripple. Used in automotive power distribution and industrial multi-rail systems requiring tight tracking and thermal robustness.
For engineers reviewing the LT3692AHFE#TRPBF datasheet, LT3692AHFE#TRPBF pinout, LT3692AHFE#TRPBF application, or LT3692AHFE#TRPBF equivalent, key selection criteria include its –40°C to 150°C guaranteed junction temperature range, FMEA-compliant 38-pin exposed-pad TSSOP package, dual-channel synchronization capability (250kHz–2MHz), and independent programmable current limits per channel.
Technical Context
The LT3692AHFE#TRPBF implements independent current-mode control per channel with separate VC error amplifier outputs, ILIM-set peak current limits, and antiphase clocking maintained across its full 250kHz–2MHz frequency range. Its internal oscillator supports resistor-programmed or external clock synchronization via RT/SYNC, with DIV pin enabling 1×/2×/4×/8× frequency division on Channel 1.
Each channel includes dedicated CMPI/CMPO comparator inputs for power-good signaling, TJ die temperature monitoring (250mV @ 25°C, 10mV/°C), and BST bootstrap circuitry enabling high-side NPN drive. Minimum on-time is reduced versus LT3692, supporting high VIN-to-VOUT ratios and 95% maximum duty cycle for low-dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 36V continuous; withstands 60V transients - enables direct battery-input operation in 24V industrial and automotive systems. |
| Output Current per Channel | Up to 3.5A - supports high-power digital loads like FPGAs, DSPs, and multi-core processors without external MOSFETs. |
| Switching Frequency Range | 250kHz to 2.5MHz - allows optimization of inductor size and EMI filtering while maintaining antiphase operation. |
| Junction Temperature Range | –40°C to +150°C (guaranteed) - qualified for under-hood automotive and high-ambient industrial environments. |
| Feedback Reference Voltage | 806mV ±16mV over temperature - ensures precise output regulation and stable tracking between channels. |
| Quiescent Current (Shutdown) | <10µA total - critical for always-on systems requiring ultra-low standby power consumption. |
| Phase Relationship | 180° antiphase switching - reduces input/output capacitor RMS current and minimizes voltage ripple by interleaving ripple currents. |
Pinout & Package
LT3692AHFE#TRPBF uses a 38-lead plastic TSSOP package with exposed pad (Pin 39 = GND), optimized for thermal dissipation (θJA = 17.5°C/W). The exposed pad must be soldered to PCB ground plane for reliable operation at 150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST1/BST2 | Bootstrap supply for high-side NPN switch | Enables full saturation of internal NPN transistors; requires external ceramic capacitor (typically 0.1µF) from BSTx to SWx. |
| SW1/SW2 | Emitter of internal NPN power switch | Connects to inductor; requires external Schottky catch diode to GND to clamp negative voltage spikes during turn-off. |
| VIN1/VIN2 | Power inputs for control logic (VIN1) and Channel 2 output stage (VIN2) | VIN1 powers shared circuitry (oscillator, references); VIN2 must be ≥2.8V for Channel 2 operation. |
| SHDN1/SHDN2 | Independent enable/disable control | SHDN1 controls both channels; SHDN2 only affects Channel 2. Threshold = 1.32V typical. |
| ILIM1/ILIM2 | Peak current limit programming | 12µA internal current source pulls to GND via resistor; sets current limit from 2A (0V) to 4.8A (1.5V). |
| RT/SYNC | Oscillator frequency setting / sync input | Accepts external clock (250kHz–2MHz) or resistor (28kΩ ≈ 1MHz); rising-edge synchronized with CLKOUT. |
| DIV | Channel 1 frequency divider select | 12µA current source to GND resistor sets 1×/2×/4×/8× division ratio relative to master clock. |
| TJ | Die temperature monitor output | 250mV @ 25°C, 10mV/°C slope - enables real-time thermal protection and system-level temperature compensation. |
Key Features
| Feature | Design Value |
|---|---|
| Antiphase dual-channel operation | Maintains 180° phase shift across full frequency range, reducing input/output capacitor stress and EMI peaks. |
| Independent programmable current limits | Each channel's peak inductor current set via dedicated ILIM pin (2A–4.8A range), enabling asymmetric load handling. |
| FMEA-compliant 38-pin TSSOP | Designed for functional safety applications; exposed pad ensures thermal reliability at 150°C junction temperature. |
| Flexible tracking and sequencing | Independent SS1/SS2 pins allow user-defined soft-start timing and output voltage ramp coordination. |
| Integrated die temperature sensing | TJ pin provides calibrated analog voltage (250mV @ 25°C, ±100mV error over temp) for closed-loop thermal management. |
| Low dropout operation | 95% maximum duty cycle enabled by boost capacitor recharge management, supporting high VIN-to-VOUT ratios. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Powering microcontroller core (1.2V/2.5A) and I/O rail (3.3V/2.5A) from 12V/24V battery with transient immunity. IC Role / Device Role / Timing Role: Dual-channel synchronous buck regulator providing tightly tracked, sequenced, and thermally monitored power rails. Use Value: Eliminates need for discrete sequencing ICs; 150°C rating supports placement near engine compartment heat sources. |
Use Scenario: Generating isolated 5V and 3.3V rails for FPGA, ADC, and communication interfaces in factory automation equipment. IC Role / Device Role / Timing Role: High-current, dual-output DC/DC controller with independent UVLO and power-good signaling per rail. Use Value: Independent CMPI/CMPO pins enable per-rail fault detection and system-level power sequencing without external comparators. |
| Telecom Base Station Power Management | Medical Imaging Power Subsystem |
Use Scenario: Supplying RF transceiver bias (3.3V) and digital baseband (1.2V) from 48V intermediate bus with strict EMI requirements. IC Role / Device Role / Timing Role: Synchronized dual-buck converter with antiphase switching and external clock sync to avoid spectral interference. Use Value: 2.2MHz max switching frequency enables small 0.5µH inductors; CLKOUT pin allows synchronization with system clock domain. |
Use Scenario: Providing clean, low-noise 1.8V and 2.5V supplies for high-resolution ADCs and sensor front-ends in portable ultrasound devices. IC Role / Device Role / Timing Role: Dual-channel regulator with independent soft-start and feedback compensation for noise-sensitive analog rails. Use Value: VC1/VC2 pins allow external compensation network tuning to optimize PSRR and transient response for analog signal chains. |
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 |
|---|---|---|---|
| LTC3892EFE#PBF | Two-phase synchronous buck controller (external MOSFETs); higher efficiency at >5A; no integrated switches. | Requires external power stage; better suited for >5A or >40V input designs where thermal management is critical. | Select when higher output current, wider input range (up to 60V), or discrete MOSFET optimization is required. |
| TPS544B20RQFT | Single-chip dual-output buck converter with integrated FETs; 4.5V–18V input; lower max temp (125°C). | Lacks antiphase operation, TJ monitor, and wide VIN range; not rated for automotive under-hood use. | Select for cost-sensitive, space-constrained 12V-input applications where extended temperature range is not required. |
Compared with LTC3892EFE#PBF and TPS544B20RQFT, the LT3692AHFE#TRPBF uniquely combines integrated 3.8A NPN switches, guaranteed 150°C operation, antiphase ripple cancellation, and die temperature monitoring - making it optimal for compact, high-reliability dual-rail systems in harsh environments.
Availability
LT3692AHFE#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, and telecom base station power supplies requiring stable component supply, long-term lifecycle support, and guaranteed high-temperature performance.
Supply support for LT3692AHFE#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3692A product line delivers monolithic dual-channel buck regulators with integrated high-current switches and advanced thermal/power management features, designed specifically for demanding automotive and industrial power systems requiring reliability, precision, and functional safety compliance.
FAQ
What is the guaranteed operating junction temperature range for LT3692AHFE#TRPBF?
The LT3692AHFE#TRPBF is guaranteed to operate over a junction temperature range of –40°C to +150°C, validated per specification and supported by its FMEA-compliant 38-pin TSSOP package with exposed thermal pad. This rating makes LT3692AHFE#TRPBF suitable for under-hood automotive applications and high-ambient industrial environments where thermal derating is critical.
How does the DIV pin function in LT3692AHFE#TRPBF?
The DIV pin on LT3692AHFE#TRPBF sets the frequency division ratio for Channel 1 relative to the master clock generated at RT/SYNC. An internal 12µA current source drives an external resistor to GND, producing voltages that select 1×, 2×, 4×, or 8× division - enabling optimized component sizing for Channel 1 while maintaining 180° antiphase relationship with Channel 2 in LT3692AHFE#TRPBF.
Can LT3692AHFE#TRPBF synchronize to an external clock, and what is the valid frequency range?
Yes, LT3692AHFE#TRPBF supports external clock synchronization via the RT/SYNC pin, accepting input frequencies from 250kHz to 2MHz. Synchronization occurs on the rising edge of the applied clock signal, and the internal AGC loop maintains consistent slope compensation and phase relationships - ensuring stable operation and predictable EMI behavior in LT3692AHFE#TRPBF-based systems.
What is the purpose of the TJ pin on LT3692AHFE#TRPBF, and how is it calibrated?
The TJ pin on LT3692AHFE#TRPBF outputs an analog voltage proportional to die junction temperature: 250mV at 25°C with a linear slope of 10mV/°C. It is calibrated across the full –40°C to +150°C range and provides ±100mV accuracy, enabling real-time thermal monitoring, overtemperature protection, and adaptive system throttling in LT3692AHFE#TRPBF deployments.
Does LT3692AHFE#TRPBF support independent power-good signaling for each channel?
Yes, LT3692AHFE#TRPBF provides independent power-good functionality per channel using CMPI1/CMPI2 and CMPO1/CMPO2 pins. Each CMPI pin compares FB voltage to 720mV threshold (90% of 806mV reference); when met, the corresponding open-collector CMPO pin sinks current - allowing discrete or wired-OR power-good status reporting for each output rail in LT3692AHFE#TRPBF designs.
LT3692AHFE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LT3692AHFE#TRPBF FAQ
1.How can I place an order for LT3692AHFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3692AHFE#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 LT3692AHFE#TRPBF reliable?
The price and inventory of LT3692AHFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3692AHFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3692AHFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3692AHFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3692AHFE#TRPBF?
LT3692AHFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3692AHFE#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 LT3692AHFE#TRPBF?
For technical support, including LT3692AHFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3692AHFE#TRPBF requirements.
6.How does Aetrix verify that LT3692AHFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3692AHFE#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 LT3692AHFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3692AHFE#TRPBF?
All LT3692AHFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3692AHFE#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 LT3692AHFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3692AHFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3692AHFE#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…
