LT8342
RECOMMENDED FOR NEW DESIGNS40V, 9A, Low IQ Synchronous Step-Up Silent Switcher with Input Disconnect and PassThru
- Part Models
- 3
- 1ku List Price
- Starting From $5.30
Overview
- Silent Switcher™ Architecture
- Ultralow EMI Emissions
- Optional Spread Spectrum Frequency Modulation
- Integrated 40V, 9A Power Switches
- Output Short Protection/Inrush Current Reduction
- Wide Input Voltage Range: 2.8V to 40V
- Output Voltage Programmable up to 36V
- Optional 2 Pins select 21 output voltages
- Low VIN Pin Quiescent Current:
- 350nA In Shutdown; 9μA In Burst Mode; 12μA In PassThru™ (VIN ≥ VOUT)
- 100% Duty Cycle Capability
- Adjustable and Synchronizable: 300kHz to 3MHz
- Pulse-Skipping or Burst Mode at Light Load
- Output Soft-Start and Power Good Monitoring
- Small 24-Lead (4mm × 4mm) LQFN Package
The LT®8342 is a low IQ, synchronous step-up DC/DC converter. It features a Silent Switcher architecture and optional spread spectrum frequency modulation to minimize electromagnetic interference (EMI) emissions while delivering high efficiencies at high switching frequencies. Output short circuit protection and inrush current reduction are optional.
The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty cycle capability for the synchronous MOSFET in PassThru operation (VIN ≥ VOUT) make the LT8342 ideally suited for general-purpose step-up and automotive Pre- Boost applications.
To reduce VOUT quiescent current in the feedback loop, an optional internal resistor divider (≥10MΩ) and two pins select 21 output voltage levels.
The LT8342 integrates 40V, 9A power switches, operating at a switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8342 features a programmable output soft-start, output power good flag, and output overvoltage lockout.
APPLICATIONS
Documentation
Data Sheet 1
Brochure 1
Rarely Asked Question 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT8342RV#PBF | 24-Lead (4mm × 4mm × 0.95mm) | ||
| LT8342RV#TRMPBF | 24-Lead (4mm × 4mm × 0.95mm) | ||
| LT8342RV#TRPBF | 24-Lead (4mm × 4mm × 0.95mm) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT8342
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Evaluates: LT8342 in 24V Output Voltage Application
Resources
Evaluates: LT8342 in 24V Output Voltage Application