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Analog Devices Inc. LT8342RV#TRPBF
- Part No.:
- LT8342RV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-TFQFN Exposed Pad
- Datasheet:
-
LT8342RV#TRPBF.pdf
- Description:
- 40V/7A LOW IQ SYNDCH. STEP UP
- Quantity:
- Payment:
- Shipping:
Inventory:2,363
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Product details
Overview
LT8342RV#TRPBF from Analog Devices is a 40V, 9A synchronous step-up DC/DC converter with Silent Switcher architecture, integrated 40V/9A power switches, and PassThru™ mode enabling 100% duty cycle operation when VIN ≥ VOUT. It delivers up to 36V output programmable via two pins selecting 21 fixed voltages, supports 300kHz–3MHz switching frequency, and achieves 350nA shutdown IQ for automotive pre-boost and industrial power supplies.
For engineers reviewing the LT8342RV#TRPBF datasheet, LT8342RV#TRPBF pinout, LT8342RV#TRPBF application, or LT8342RV#TRPBF equivalent, key selection criteria include input disconnect capability, ultralow EMI emissions, burst-mode quiescent current (9μA), output short-circuit protection, and compatibility with 4mm × 4mm LQFN thermal design requirements.
Technical Context
The LT8342RV#TRPBF implements a synchronous boost topology with dual internal NMOS power switches (25mΩ bottom, 30mΩ top) and an integrated 3.6V INTVCC regulator. Its Silent Switcher architecture uses balanced PCB layout and differential inductor coupling to suppress common-mode EMI, while optional spread spectrum modulation further reduces peak radiated emissions.
It features three operating modes controlled by SYNC/MODE pin: Burst Mode (9μA IQ), Pulse-Skipping Mode (1.9mA IQ), and PassThru™ mode (12μA IQ at VIN ≥ VOUT). The device includes programmable soft-start, power-good monitoring with ±7% window, and overvoltage lockout at 111% of target VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 40V - supports cold-crank automotive (4.5V) and wide-input industrial rails without external LDO pre-regulation. |
| Output Voltage Range | Programmable up to 36V - enables 24V system rail generation from 12V battery or 5V USB-PD source. |
| Switching Frequency | 300kHz to 3MHz - allows optimization between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Quiescent Current | 9μA in Burst Mode - extends battery life in always-on automotive modules such as telematics or ADAS sensors. |
| Peak Output Current | 9A - sustains high-power loads like LED drivers or RF amplifiers without external current boosting. |
| EMI Performance | Ultralow emissions per CISPR 25 Class 5 - eliminates need for external EMI filters in automotive infotainment and display power supplies. |
| Package Thermal Resistance | θJA = 22°C/W on demo board - enables 5W+ continuous output power without forced air cooling in compact layouts. |
Pinout & Package
LT8342RV#TRPBF is housed in a thermally enhanced 24-lead (4mm × 4mm) LQFN package with exposed pad for optimal heat dissipation. The exposed GND pad must be soldered to a continuous copper plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | External N-FET gate driver | Provides 9µA pull-up to VIN + 6.5V for input disconnect FET control; requires external clamp diode to prevent overvoltage. |
| SW | Power switch node | Drain/source connection point for internal 40V/9A NMOS switches; minimal trace area required to reduce EMI radiation. |
| VOUT | Regulated output | Requires ≥4.7µF low-ESR ceramic capacitor plus two 0.1µF local caps for Silent Switcher ripple suppression. |
| VSET2/FB | Feedback reference | Regulated to 1.00V (±1%) - sets output voltage via resistor divider or 21-step internal configuration with VSET1. |
| PG | Power good indicator | Open-drain output pulled low when VOUT deviates >±7% from target - used for system sequencing and fault reporting. |
| EN/UVLO | Enable & undervoltage lockout | 1.02V threshold with 62mV hysteresis - enables VIN-based brown-out protection down to 2.8V input. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher™ Architecture | Reduces radiated EMI by >30dB vs conventional boost converters - meets CISPR 25 Class 5 without shielding or ferrites. |
| PassThru™ Mode | Enables 100% duty cycle operation when VIN ≥ VOUT - eliminates switching loss and improves efficiency in battery-powered systems during high-VIN conditions. |
| Input Disconnect Support | Integrated GATE driver controls external N-FET to isolate input during fault or shutdown - prevents reverse current and enables hot-swap capability. |
| 21-Step Output Programming | Two-pin interface (VSET1/VSET2/FB) selects fixed VOUT from 4V to 36V - eliminates external resistors and reduces BOM count in production designs. |
| Output Short-Circuit Protection | Active current limiting with 450ns fault-to-GATE-off propagation - protects downstream circuitry during load faults without latch-up or thermal runaway. |
Applications
| Automotive Pre-Boost | Industrial Sensor Power |
|---|---|
Use Scenario: Powers 24V camera modules during engine stop-start cycles where battery voltage drops to 6V. IC Role / Device Role / Timing Role: Step-up controller maintaining stable 24V rail despite 6–16V input variation; operates in Burst Mode to minimize standby drain. Use Value: Enables uninterrupted vision system operation during cold-crank (4.5V) and stop-start transients without requiring oversized input capacitors. | Use Scenario: Supplies regulated 12V to MEMS pressure sensors in oil & gas pipeline monitoring equipment. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering 12V from 4.2V Li-ion battery; uses PassThru™ mode above 12V to eliminate switching loss. Use Value: Extends field-deployed sensor battery life beyond 5 years by reducing quiescent current to 12μA during VIN ≥ VOUT conditions. |
| LED Backlight Driver | Portable Medical Device Power |
Use Scenario: Drives 18V white LED strings in portable ultrasound displays powered by single-cell lithium battery. IC Role / Device Role / Timing Role: Synchronous boost IC with programmable soft-start and power-good flag - ensures flicker-free backlight ramp-up and system readiness signaling. Use Value: Achieves >85% efficiency at 500mA load while meeting IEC 60601 EMI limits due to Silent Switcher architecture. | Use Scenario: Generates isolated 5V and 3.3V rails for patient-monitoring ECG front-end using discrete flyback + post-regulator topology. IC Role / Device Role / Timing Role: Primary non-isolated boost stage providing 12V intermediate bus from 3.6V medical-grade LiPo cell. Use Value: Reduces thermal stress in sealed enclosures via 22°C/W θJA and eliminates need for heatsinks in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EFE#PBF | Higher 60V input rating but no integrated switches; requires external MOSFETs and higher BOM cost. | Better suited for >40V input industrial HVDC systems; lacks PassThru™ and Silent Switcher EMI reduction. | Select when input exceeds 40V or when discrete FET selection is needed for thermal partitioning. |
| TPS61088RHLR | Lower 2.7V–12V input range, 12A peak current, no input disconnect or SSFM; 13μA Burst Mode IQ. | Optimized for USB-C PD power banks; not rated for automotive temperature range (−40°C to 125°C). | Choose for cost-sensitive consumer electronics with ≤12V input and no EMI certification requirements. |
Compared with LTC3780EFE#PBF and TPS61088RHLR, the LT8342RV#TRPBF uniquely combines integrated 40V/9A switches, automotive-grade temperature range, ultralow EMI, and PassThru™ mode - making it the only option supporting both cold-crank robustness and CISPR 25 compliance in a single 4mm × 4mm package.
Availability
LT8342RV#TRPBF is available at Aetrix Electronics and suitable for automotive pre-boost, industrial sensor power, and portable medical device power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for LT8342RV#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The LT8342RV#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency DC/DC converters designed specifically for demanding automotive, industrial, and medical applications where low EMI, high reliability, and wide input range are critical.
FAQ
What is the maximum output voltage supported by the LT8342RV#TRPBF?
The LT8342RV#TRPBF supports output voltages up to 36V, either through external resistor divider feedback or via its internal 21-step programming interface using VSET1 and VSET2/FB pins. This maximum is enforced by the internal overvoltage lockout circuit, which triggers at 111% of the target output voltage - ensuring reliable operation even under transient load or feedback fault conditions. The LT8342RV#TRPBF maintains regulation accuracy within ±2% across temperature and line/load variations.
Does the LT8342RV#TRPBF support synchronization to an external clock?
Yes, the LT8342RV#TRPBF supports external clock synchronization via the SYNC/MODE pin. When configured in Sync mode (SYNC/MODE pin driven low), the internal oscillator locks to an external clock signal with frequency tolerance of ±10% relative to the RT-programmed switching frequency. This capability enables deterministic EMI reduction in multi-converter systems and eliminates beat frequencies in noise-sensitive applications. The LT8342RV#TRPBF also supports spread spectrum modulation independently or concurrently with synchronization.
How does the PassThru™ mode function in the LT8342RV#TRPBF?
In PassThru™ mode, the LT8342RV#TRPBF disables switching and configures its internal synchronous MOSFETs to act as a low-resistance path when VIN ≥ VOUT, achieving true 100% duty cycle operation. This mode reduces quiescent current to 12μA and eliminates switching losses, improving efficiency during high-input conditions - critical for battery-powered systems transitioning from charging to discharge. The LT8342RV#TRPBF automatically enters PassThru™ when VIN exceeds VOUT by the internal hysteresis margin and exits cleanly upon VIN drop.
What thermal considerations apply to the LT8342RV#TRPBF in high-power operation?
The LT8342RV#TRPBF has a thermal resistance of θJA = 22°C/W on its demo board and requires proper PCB thermal design: the exposed pad must be soldered to a solid ground plane with ≥6 thermal vias (0.3mm diameter) connecting to inner/secondary ground layers. At 5W output power, junction temperature rise is ~110°C above ambient - staying within the −40°C to 150°C operating range if ambient remains ≤40°C. The LT8342RV#TRPBF includes thermal lockout that disables switching if die temperature exceeds 165°C.
Can the LT8342RV#TRPBF drive an external input-disconnect FET, and how is it implemented?
Yes, the LT8342RV#TRPBF integrates a dedicated GATE driver pin to control an external N-channel FET for input disconnect functionality. The GATE pin sources 9µA to charge the FET gate to VIN + 6.5V, enabling fast turn-on while preventing overvoltage with an external clamp diode between gate and source. During overcurrent events, the LT8342RV#TRPBF pulls GATE low within 450ns to disable the FET. If unused, the GATE pin must be tied to ground - never left floating.
LT8342RV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®8342
- Package/Case:
- 24-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 2.8V ~ 40V
- Frequency - Switching:
- 300kHz ~ 3MHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Pulse Skipping, Ramp, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LQFN (4x4)
LT8342RV#TRPBF FAQ
1.How can I place an order for LT8342RV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8342RV#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 LT8342RV#TRPBF reliable?
The price and inventory of LT8342RV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8342RV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8342RV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8342RV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8342RV#TRPBF?
LT8342RV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8342RV#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 LT8342RV#TRPBF?
For technical support, including LT8342RV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8342RV#TRPBF requirements.
6.How does Aetrix verify that LT8342RV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8342RV#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 LT8342RV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8342RV#TRPBF?
All LT8342RV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8342RV#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 LT8342RV#TRPBF part is unused and in its original packaging.
Return procedure for LT8342RV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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