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Overview
| Topology | Boost Converter |
| Input voltage | 4-16 V |
| Switching frequency | 300-3000 kHz |
| Output 1 | 24 V / 0.34 A |
Description
The LT®8338 is a synchronous monolithic step-up regulator that provides high efficiency for input and output up to 40V. It consumes only 6μA quiescent current atBurst Mode operation to maintain high efficiency at very low output current, while keeping the output ripple below 20mVP-P. The LT8338 switching frequency can be set with an external resistor over the range of 300kHz to 3MHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between Burst Mode operation and pulse-skipping mode, or to enable spread spectrum modulation to reduce EMI. The EN/UVLO pin has an accurate 1V threshold and can be used to program VIN UVLO or to shut down the part. The LT8338 enters 100% duty cycle PassThru mode when VIN is higher than the regulated VOUT. The LT8338 also features frequency foldback and internal soft-start for inductor current control during start-up.
Features
- Wide Input Voltage Range: 3.0V to 40V
- Low Quiescent Current in Burst Mode® Operation
- <6μA IQ
- <20mVP-P Output Ripple
- Synchronous Operation for High Efficiency
- Monolithic 40V, 240mΩ Power Switches
- 100% Duty Cycle PassThru™ Mode for Boost Preregulation Applications
- Adjustable and Synchronizable: 300kHz to 3MHz
- Spread Spectrum for Reduced EMI/EMC Emissions
- Accurate EN/UVLO
- Internal Compensation
- 20MΩ Internal Feedback Divider
- Output Voltage Up to 40V
- Available in 10-Lead MSOP Package
- AEC-Q100 Automotive Qualification in Progress
Typical applications
- Battery-Powered Systems
- Automotive Power Supplies
- Industrial, General Purpose Step-Up
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Mount | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(mΩ) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-MAPI SMT Power Inductor, 4.7 µH, 2.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance4.7 µH | Performance Rated Current2.4 A | Saturation Current @ 30%5.15 A | DC Resistance137 mΩ | Self Resonant Frequency30 MHz | Operating Voltage80 V | MountSMT | – | – | – | – | DC Resistance158 mΩ | – | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | MountSMT | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance150 MHz | Rated Current 22000 mA | DC Resistance150 mΩ | TypeHigh Current |