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Analog Devices Inc. LT8342RV#TRMPBF
- Part No.:
- LT8342RV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-TFQFN Exposed Pad
- Datasheet:
-
LT8342RV#TRMPBF.pdf
- Description:
- 40V/7A LOW IQ SYNDCH. STEP UP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT8342RV#TRMPBF 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 voltage, operates from 2.8V to 40V input, achieves 350nA shutdown IQ, and integrates 40V/9A power switches in a 4mm × 4mm LQFN-24 package for automotive pre-boost and industrial power supplies.
For engineers reviewing the LT8342RV#TRMPBF datasheet, LT8342RV#TRMPBF pinout, LT8342RV#TRMPBF application, or LT8342RV#TRMPBF equivalent, key selection criteria include its 100% duty cycle PassThru operation, ultralow EMI emissions, programmable 300kHz–3MHz switching frequency, 21-pin-selectable output voltages, and integrated input-disconnect gate driver with 37.5mV current-sense threshold.
Technical Context
The LT8342RV#TRMPBF implements a synchronous boost topology with dual internal NMOS power switches (25mΩ bottom, 30mΩ top), enabling high-efficiency conversion across wide VIN/VOUT ratios. Its Silent Switcher architecture uses symmetrical layout and integrated bypass capacitors to suppress common-mode EMI, while optional spread spectrum modulation further reduces peak radiated emissions.
It supports three operating modes via SYNC/MODE pin: Burst Mode (9μA IQ), Pulse-Skipping Mode (1.9mA IQ), and PassThru™ (12μA IQ when VIN ≥ VOUT). The device features programmable soft-start, power-good monitoring with ±7% window, and overvoltage lockout at 111% of target VOUT - all critical for robust automotive cold-crank and stop-start applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 40V - supports wide-range battery inputs including 12V automotive and 24V industrial rails. |
| Output Voltage Range | Programmable up to 36V - enables single-stage boosting for LED drivers, APD bias, and industrial sensors. |
| Switch Current Limit | 9A typical - defines maximum continuous load capability with thermal derating above 125°C junction. |
| Quiescent Current | 350nA in shutdown; 9μA in Burst Mode - extends battery life in always-on systems like telematics and ADAS modules. |
| Switching Frequency | 300kHz to 3MHz - allows optimization between efficiency (lower fSW) and size (higher fSW with smaller magnetics). |
| PassThru Duty Cycle | 100% - maintains VOUT regulation without switching loss when VIN ≥ VOUT, reducing heat and improving efficiency in pre-boost scenarios. |
| EMI Performance | Ultralow emissions per CISPR 25 Class 5 - eliminates need for external EMI filters in automotive infotainment and cluster designs. |
Pinout & Package
LT8342RV#TRMPBF is housed in a thermally enhanced 24-lead (4mm × 4mm) LQFN package with exposed pad for optimal thermal dissipation. Pin 1 is GATE; Pin 7–12 and exposed pad 25 are GND; Pin 8–11 are VOUT; Pin 23 is VIN; Pin 22 is EN/UVLO; Pin 13 is VSET2/FB; Pin 14 is VSET1; Pin 17 is RT; Pin 18 is VC; Pin 19 is SS; Pin 20 is INTVCC; Pin 21 is PG; Pin 15 is PREBOOST; Pin 16 is SYNC/MODE; Pin 4–6 are SW; Pin 3 is BST; Pin 2 is NC; Pin 24 is SNS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (Pin 1) | External N-FET gate driver | Provides 9µA pull-up to VIN + 6.5V for input-disconnect FET control; requires external clamp diode. |
| VIN (Pin 23) | Main input supply | Accepts 2.8V–40V; powers internal regulators and serves as positive sense input for input-disconnect current comparator. |
| EN/UVLO (Pin 22) | Enable and undervoltage lockout | 1.02V accurate threshold with 62mV hysteresis; enables resistor-divider VIN UVLO programming. |
| VSET1 / VSET2/FB (Pins 14 / 13) | Output voltage configuration | Two pins select 21 fixed VOUT levels (4V–36V); FB regulated to 1.00V ±1% over temperature. |
| SYNC/MODE (Pin 16) | Operating mode selector | Five states: Burst, Pulse-Skip, Sync, SSFM, or Burst+SSFM - directly controls light-load efficiency and EMI behavior. |
| PG (Pin 21) | Power good indicator | Open-drain output pulled low when VOUT deviates >±7% from target; PREBOOST pin configures window for PassThru. |
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. |
| Input disconnect with GATE driver | Enables controlled hot-swap and reverse-current protection using external N-FET; 37.5mV current-sense threshold ensures fast fault response. |
| PassThru™ mode | 100% duty cycle operation when VIN ≥ VOUT - eliminates switching losses and improves efficiency in automotive pre-boost during engine cranking. |
| 21-pin-selectable output voltages | Eliminates external feedback resistors and saves PCB space; supports factory-programmed outputs from 4V to 36V in 2V steps. |
| Adjustable switching frequency | 300kHz–3MHz via RT resistor or external clock - enables optimization for EMI, efficiency, and component size in space-constrained designs. |
Applications
| Automotive Pre-Boost Converter | Industrial 24V Step-Up Supply |
|---|---|
Use Scenario: Powering 24V infotainment head units from 9V–16V vehicle battery during cold-crank (down to 3.5V). IC Role / Device Role / Timing Role: Primary synchronous boost controller with PassThru mode and input disconnect for load dump isolation. Use Value: Maintains stable 24V output at 3A with <9μA quiescent current in Burst Mode, meeting ISO 16750-2 pulse 4 requirements. | Use Scenario: Generating 36V rail for industrial PLC I/O modules from 12V or 24V backplane. IC Role / Device Role / Timing Role: High-current step-up regulator with programmable soft-start and power-good signaling for system sequencing. Use Value: Delivers 9A peak current with 25mΩ RDS(on) bottom switch, achieving >92% efficiency at full load and 2MHz switching for compact 2.2µH inductor. |
| LED Backlight Driver | Portable Medical Sensor Bias |
Use Scenario: Driving 12-series white LEDs (36V, 150mA) from single-cell Li-ion (3.0V–4.2V). IC Role / Device Role / Timing Role: Constant-voltage boost converter with precision 1.00V feedback reference and adjustable soft-start. Use Value: Achieves ±2% VOUT accuracy over −40°C to +125°C and supports spread spectrum modulation to reduce EMI near sensitive RF receivers. | Use Scenario: Providing low-noise 15V bias for avalanche photodiode (APD) in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-IQ, low-ripple boost source with Burst Mode operation and 350nA shutdown current. Use Value: Extends battery runtime beyond 100 hours per charge while maintaining <10mVpp output ripple via Silent Switcher layout and ceramic output filtering. |
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 4V–36V input range but lower 6A output current. | Used in higher-power, discrete-controlled boost designs where thermal management is distributed across multiple packages. | Select when board-level thermal design favors discrete FETs or when >36V output is required via external flyback transformer. |
| LT8330EDDB#TRMPBF | Lower 5A current limit; 36V max input; no PassThru mode; same 4mm × 4mm DFN package but only 12 pins. | Targeted at cost-sensitive, lower-current applications such as USB-C PD accessory power stages. | Select when 5A output suffices and PassThru functionality is unnecessary - offers 30% lower BOM cost with identical footprint compatibility. |
Compared with LTC3780EFE#PBF and LT8330EDDB#TRMPBF, the LT8342RV#TRMPBF uniquely combines integrated 9A switches, PassThru operation, and Silent Switcher EMI reduction in a single 24-pin LQFN - making it the only option that satisfies automotive pre-boost, high-current industrial, and low-IQ portable requirements without compromise.
Availability
LT8342RV#TRMPBF is available at Aetrix Electronics and suitable for automotive pre-boost, industrial 24V step-up, and portable medical sensor bias applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8342RV#TRMPBF 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#TRMPBF belongs to Analog Devices' Power by Linear™ family of low-EMI, high-efficiency DC/DC converters designed specifically for demanding automotive, industrial, and medical applications where reliability, noise immunity, and ultra-low quiescent current are critical.
FAQ
What is the maximum output voltage supported by the LT8342RV#TRMPBF?
The LT8342RV#TRMPBF supports an output voltage programmable up to 36V. This is achieved either through its internal 21-level pin-selectable feedback network (using VSET1 and VSET2/FB pins) or via external resistor divider. The device regulates the VSET2/FB pin to 1.00V ±1%, ensuring precise output accuracy across temperature and load conditions. Output overvoltage lockout activates at 111% of the target voltage.
Does the LT8342RV#TRMPBF support synchronization to an external clock?
Yes, the LT8342RV#TRMPBF supports external clock synchronization via the SYNC/MODE pin. When configured in Sync mode (pin tied to GND or <0.1V), the device locks its switching frequency to an external clock signal. The external clock frequency must be within 90%–125% of the internally programmed frequency set by the RT resistor. This feature enables deterministic EMI reduction and multi-phase interleaving in complex power systems.
How does the PassThru™ mode function in the LT8342RV#TRMPBF?
In PassThru™ mode, the LT8342RV#TRMPBF operates with 100% duty cycle when VIN ≥ VOUT, effectively connecting input to output through the synchronous MOSFETs without switching. This eliminates switching losses and reduces quiescent current to 12μA, significantly improving efficiency during high-input conditions such as automotive engine running. The mode is automatic and requires no external control signals.
What is the purpose of the GATE pin on the LT8342RV#TRMPBF?
The GATE pin (Pin 1) on the LT8342RV#TRMPBF drives the gate of an external N-channel FET used for input disconnect. It provides a 9µA internal current source to charge the gate to VIN + 6.5V, enabling controlled turn-on of the FET. An external clamp diode between gate and source is mandatory. If input disconnect is not needed, the GATE pin must be tied to ground - floating it is prohibited.
Can the LT8342RV#TRMPBF operate with input voltages below 3V?
Yes, the LT8342RV#TRMPBF operates down to 2.8V input voltage across its full temperature range (−40°C to +150°C). At 2.8V VIN, the device maintains regulation and delivers full 9A current capability when VOUT is appropriately scaled (e.g., 5V or 8V). Startup is guaranteed when INTVCC exceeds 2.75V, which occurs reliably even at minimum VIN due to the internal charge pump and bootstrap circuitry.
LT8342RV#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LT8342RV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8342RV#TRMPBF 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#TRMPBF reliable?
The price and inventory of LT8342RV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8342RV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8342RV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8342RV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8342RV#TRMPBF?
LT8342RV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8342RV#TRMPBF 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#TRMPBF?
For technical support, including LT8342RV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8342RV#TRMPBF requirements.
6.How does Aetrix verify that LT8342RV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8342RV#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8342RV#TRMPBF?
All LT8342RV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8342RV#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LT8342RV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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