LT8337/LT8337-1
RECOMMENDED FOR NEW DESIGNS28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru
- Part Models
- 8
- 1ku List Price
- Starting From $3.51
Overview
- Silent Switcher® Architecture
- Ultralow EMI Emissions
- Optional Spread Spectrum Frequency Modulation
- Integrated 28V, 5A Power Switches
- Wide Input Voltage Range: 2.7V to 28V
- Output Voltage Programmable Up to 26V
- Low VIN Pin Quiescent Current
- 0.3μA in Shutdown
- 4μA in Burst Mode® Operation (LT8337)
- 15μA in PassThru™ (LT8337)
- 100% Duty Cycle Capability for Synchronous MOSFET
- External Compensation: Fast Transient Response (LT8337-1)
- Power Good Monitor (LT8337)
- Adjustable and Synchronizable: 300kHz to 3MHz
- Pulse-Skipping or Burst Mode Operation at Light Load
- Small 16-Lead (3mm × 3mm) LQFN Package
The LT8337/LT8337-1 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) to minimize EMI emissions while delivering high efficiencies at high switching frequencies.
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) makes the LT8337/LT8337-1 ideally suited for battery-powered systems and general purpose step-up applications.
The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout.
The LT8337-1 allows external compensation via the VC pin for fast transient response. The LT8337 offers an output power good flag via the PG pin.
Applications
- Battery-Powered Systems
- General Purpose Step-Up
Documentation
Data Sheet 1
User Guide 2
Technical Articles 3
Brochure 2
Book & eBook 1
Webcast 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 |
|---|---|---|---|
| LT8337EV#PBF | 16-Lead LQFN Package | ||
| LT8337EV#TRPBF | 16-Lead LQFN Package | ||
| LT8337EV-1#PBF | 16-Lead LQFN Package | ||
| LT8337EV-1#TRPBF | 16-Lead LQFN Package | ||
| LT8337JV#PBF | 16-Lead LQFN Package | ||
| LT8337JV#TRPBF | 16-Lead LQFN Package | ||
| LT8337JV-1#PBF | 16-Lead LQFN Package | ||
| LT8337JV-1#TRPBF | 16-Lead LQFN Package |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 2
- LT8337 - 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru. Input: 2.7V to 28V, Output: 12V @ 1.33A, Fsw = 2MHz.
- LT8337-1 - 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru and Vc Pin. Input: 2.7V to 28V, Output: 12V @ 1.33A, Fsw = 2MHz
Models for the following parts are available in LTspice:
- LT8337
- LT8337-1
LTpowerCAD 2
- LT8337 Project - EVAL-LT8337-AZ 4.5-10Vin, 12, 1.35A, 2MHz
- LT8337-1 Project - EVAL-LT8337-1-AZ 4.5-10Vin, 12, 1.35A, 2MHz
Design tools for the following parts are available in LTpowerCAD:
- LT8337
- LT8337-1
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.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.