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Analog Devices Inc. LT8342RV#PBF
- Part No.:
- LT8342RV#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-TFQFN Exposed Pad
- Datasheet:
-
LT8342RV#PBF.pdf
- Description:
- 40V/7A LOW IQ SYNDCH. STEP UP
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
LT8342RV#PBF from Analog Devices is a 40V, 9A synchronous step-up DC/DC converter with Silent Switcher architecture, input disconnect capability, and PassThru™ mode. It delivers up to 36V output from 2.8V–40V input, operates down to 350nA shutdown current, supports 300kHz–3MHz programmable switching frequency, and integrates dual 40V/9A NMOS power switches. It is used in automotive pre-boost and industrial high-reliability boost supplies.
For engineers reviewing the LT8342RV#PBF datasheet, LT8342RV#PBF pinout, LT8342RV#PBF application, or LT8342RV#PBF equivalent, key selection criteria include its 100% duty cycle PassThru operation, ultralow EMI emissions, 24-pin LQFN package thermal performance, and 21-step internal VOUT programming via VSET1/VSET2 pins.
Technical Context
The LT8342RV#PBF implements a current-mode synchronous boost topology with integrated top/bottom 40V NMOS switches (25mΩ/30mΩ typical RDS(ON)). Its Silent Switcher architecture uses symmetrical layout and dual input paths to suppress common-mode EMI, while optional spread spectrum modulation further reduces peak radiated emissions.
It features three distinct light-load operating modes-Burst Mode (9μA IQ), Pulse-Skipping, and PassThru™ (12μA IQ when VIN ≥ VOUT)-and includes dedicated GATE driver for external N-channel input-disconnect FET, enabling reverse-current blocking and controlled VIN turn-on/off via EN/UVLO threshold (1.02V typ).
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 - selectable across 21 fixed levels using VSET1/VSET2 pins, or externally via resistor divider to FB pin. |
| Switching Frequency | 300kHz to 3MHz - set by RT resistor or synchronized to external clock; enables compact magnetics and noise-sensitive system placement. |
| Quiescent Current | 350nA in shutdown; 9μA in Burst Mode - extends battery life in always-on automotive modules and IoT edge nodes. |
| Power Switch Rating | Integrated 40V, 9A NMOS - eliminates external high-side switch, reduces BOM count, and supports 24V output at >3A continuous load. |
| EMI Performance | Ultralow emissions via Silent Switcher + optional SSFM - meets CISPR 25 Class 5 without metal shielding or ferrite beads in typical layouts. |
| PassThru™ Mode | 100% duty cycle when VIN ≥ VOUT - bypasses switching losses, reduces heat generation, and maintains regulation during high-input transients. |
Pinout & Package
LT8342RV#PBF is housed in a thermally enhanced 24-lead (4mm × 4mm) LQFN package with exposed pad for optimal PCB heat dissipation. The package supports JEDEC-standard reflow and achieves θJA = 38°C/W on standard 2-layer boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | External FET gate driver | 9µA internal pull-up to VIN+6.5V; controls input-disconnect N-FET; requires external clamp diode to source. |
| SW | Internal power switch node | Drain/source connection point of integrated 9A NMOS pair; high di/dt node requiring minimized trace area for EMI control. |
| VOUT | Regulated output supply | Requires ≥4.7µF low-ESR ceramic capacitor; dual 0.1µF local caps recommended for Silent Switcher RF filtering. |
| VSET2/FB | Feedback reference input | Regulated to 1.00V (±1%); sets output voltage with internal divider or external resistor network. |
| EN/UVLO | Enable and undervoltage lockout | 1.02V accurate threshold; hysteresis 62mV; enables VIN-based brown-in/out protection via resistor divider. |
| PG | Open-drain power good flag | Pulls low when VOUT deviates >±7% from target; PREBOOST pin configures window for PreBoost applications. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher architecture | Reduces peak radiated EMI by >30dB vs conventional boost ICs, eliminating need for shielded inductors or metal cans. |
| Input disconnect with GATE driver | Enables reverse-current blocking and controlled startup/shutdown; supports hot-swap and load-dump protection in automotive systems. |
| PassThru™ mode | 100% duty cycle operation when VIN ≥ VOUT minimizes conduction loss and thermal stress during high-input conditions. |
| 21-step internal VOUT programming | Eliminates external feedback resistors for common output voltages (4V–36V), reducing component count and layout complexity. |
| Spread spectrum modulation (SSFM) | ±13–20% frequency deviation spreads energy across spectrum, easing compliance with stringent automotive EMC standards. |
Applications
| Automotive Pre-Boost Converter | Industrial 24V Rail Generator |
|---|---|
Use Scenario: Powers ADAS camera modules during engine stop-start cycles where battery drops to 6V but system requires stable 12V/24V. IC Role / Device Role / Timing Role: Step-up controller maintaining regulated output during cold-crank (4.5V) and load-dump (40V) transients. Use Value: PassThru™ mode sustains output without switching loss when battery recovers above 24V; GATE driver enables input isolation during fault events. | Use Scenario: Generates isolated 24V rail from 12V factory bus for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: High-efficiency synchronous boost converter delivering >5W continuous power with <15mV ripple. Use Value: 9A integrated switches support >3A output at 24V; Burst Mode ensures <10μA standby draw during sleep states. |
| Portable Medical Instrument Supply | LED Driver Bias Generator |
Use Scenario: Powers precision analog front-ends in handheld ultrasound devices from single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Low-noise, low-IQ boost regulator supplying clean 5V/12V rails to ADCs and op-amps. Use Value: Silent Switcher architecture meets Class B conducted/radiated EMI limits without added filtering; SSFM further lowers peak emissions. | Use Scenario: Provides adjustable bias voltage (12–36V) for constant-current LED drivers in architectural lighting controls. IC Role / Device Role / Timing Role: Programmable-output boost controller supporting 21 factory-set VOUT levels via two logic pins. Use Value: Eliminates external feedback resistors and trim pots; VSET1/VSET2 configuration enables firmware-free voltage selection. |
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 | Requires external MOSFETs; no integrated 9A switches; wider 4–36V input range; no PassThru mode. | Better suited for >30A designs with discrete FET optimization; lacks input disconnect and ultralow-IQ modes. | Select when higher output current or custom FET selection is required; not drop-in for LT8342RV#PBF's integrated-switch footprint. |
| TPS61088RHLR | Lower 12V max output; 10A switch rating; no Silent Switcher; no input disconnect; 2.7V–12V input only. | Cost-optimized for consumer portable electronics; insufficient for automotive 40V transients or 36V outputs. | Choose for space-constrained USB-powered devices needing <12V output; cannot replace LT8342RV#PBF in automotive or industrial 24–36V applications. |
Compared with LTC3780EFE#PBF and TPS61088RHLR, the LT8342RV#PBF uniquely combines integrated 40V/9A switches, PassThru™ operation, Silent Switcher EMI suppression, and 21-step internal VOUT programming-enabling smaller, cooler, and more robust boost solutions in automotive and industrial environments.
Availability
LT8342RV#PBF is available at Aetrix Electronics and suitable for automotive pre-boost, industrial 24V rail generation, and portable medical instrument power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LT8342RV#PBF 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, serving industrial, automotive, communications, and healthcare markets.
The LT8342RV#PBF belongs to the Silent Switcher® family of high-efficiency, low-EMI DC/DC converters designed specifically for noise-sensitive automotive and industrial applications where board space, thermal constraints, and EMC compliance are critical.
FAQ
What is the maximum output voltage supported by the LT8342RV#PBF?
The LT8342RV#PBF supports an output voltage programmable up to 36V. This is achieved either through its internal 21-level VOUT selection (using VSET1 and VSET2 pins) or via external resistor divider feedback to the VSET2/FB pin. The device regulates the FB pin to 1.00V ±1%, and output accuracy remains within ±2% over temperature and line/load conditions per the datasheet specifications.
Does the LT8342RV#PBF support input voltage disconnect functionality?
Yes, the LT8342RV#PBF includes dedicated GATE driver circuitry to control an external N-channel FET for input disconnect. The GATE pin provides a 9µA pull-up to VIN+6.5V and supports clamping diodes for safe FET gate drive. When enabled, this feature blocks reverse current flow and allows controlled VIN turn-on/turn-off, making the LT8342RV#PBF suitable for automotive load-dump and hot-swap applications.
How does PassThru™ mode operate in the LT8342RV#PBF?
In PassThru™ mode, the LT8342RV#PBF achieves 100% duty cycle operation when VIN ≥ VOUT, effectively bypassing the switching regulator stage. This reduces conduction loss and die temperature during high-input conditions. The device maintains regulation and PG monitoring while drawing only 12μA quiescent current-significantly lower than active switching modes-making it ideal for automotive stop-start recovery scenarios.
What package type and thermal characteristics does the LT8342RV#PBF use?
The LT8342RV#PBF is packaged in a 24-lead 4mm × 4mm LQFN with exposed thermal pad. On a standard JEDEC 2-layer board, it achieves θJA = 38°C/W and θJC(BOT) = 7°C/W. The exposed pad must be soldered to a continuous copper ground plane for optimal thermal performance and current handling, as specified in the "Recommended PCB Layout Guidelines" section of the datasheet.
Can the LT8342RV#PBF be synchronized to an external clock?
Yes, the LT8342RV#PBF supports external clock synchronization via the SYNC/MODE pin. When configured for Sync mode (SYNC/MODE ≤ 0.1V), the internal oscillator locks to an external clock signal with fSYNC/fOSC ratio between 0.9 and 1.25. The external clock frequency must be no lower than 90% of the RT-resistor-programmed switching frequency to ensure stable operation.
LT8342RV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®8342
- Package/Case:
- 24-TFQFN Exposed Pad
- Packaging:
- Tray
- 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#PBF FAQ
1.How can I place an order for LT8342RV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8342RV#PBF 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#PBF reliable?
The price and inventory of LT8342RV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8342RV#PBF is usually 5 days.
3.What payment methods are accepted for LT8342RV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8342RV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8342RV#PBF?
LT8342RV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8342RV#PBF 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#PBF?
For technical support, including LT8342RV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8342RV#PBF requirements.
6.How does Aetrix verify that LT8342RV#PBF is sourced from the original manufacturer or authorized distributors?
All LT8342RV#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LT8342RV#PBF?
All LT8342RV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8342RV#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LT8342RV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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