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Overview
| Topology | Buck Converter |
| Input voltage | 3-42 V |
| Switching frequency | 250-2200 kHz |
| Output 1 | 1.5 A |
| Output 2 | 2.5 A |
| IC revision | A |
Description
The LT®8602 is a quad channel, current mode, monolithicbuck switching regulator with a programmable power-onreset. All regulators are synchronized to a single oscillatorwith an adjustable frequency from 250kHz to 2.2MHz. TheLT8602 can be configured for micropower Burst Modeoperation or pulse-skipping operation at light load. Micropoweroperation results in quiescent current of 30μAwith all four regulators operating in the application below.The high voltage channels are synchronous buck regulatorsthat operate from an input of 3V to 42V. The outputcurrents are up to 1.5A (OUT1) and 2.5A (OUT2). Thelow voltage channels operate from an input of 2.6V to5.5V. Internal synchronous power switches provide highefficiency with output currents up to 1.8A. The LT8602uses a 2-phase clock with channels 1 and 3 operating 180°from channels 2 and 4 to reduce input ripple current onboth HV and LV inputs. All channels have cycle-by-cyclecurrent limit, providing protection against shorted outputs.Thermal shutdown provides additional protection.The LT8602 is available in a 40-lead 6mm × 6mm QFNpackage.
Features
- Flexible Power Supply System Providing Four Outputs with a Wide Input Range
- Two High Voltage Synchronous Buck Regulators:
- 3V to 42V Input Voltage Range
- Output Currents Up to 2.5A and 1.5A
- High Efficiency Up to 93%
- Two Low Voltage Synchronous Buck Regulators:
- 2.6V to 5.5V Input Voltage Range
- Output Currents Up to 1.8A and 94% Efficiency
- Resistor Programmable and Synchronizable 250kHz to 2.2MHz Switching Frequency
- Low Ripple Burst Mode® Operation:
- 30μA IQ at 12VIN
- Output Ripple < 15mV
- Programmable Power-On Reset
- Power Good Indicators
- 2-Phase Clock Reduces Input Current Ripple
- Available in Thermally Enhanced 40-Lead QFN (6mm × 6mm) Package
Remarks
- Several Vendors and Suitable Inductor series available page no-15
Typical applications
- Automotive Systems
- Industrial Controls and Power Supplies
- Distributed Supply Regulation
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | fres(MHz) | Mount | RDC max.(mΩ) | Version | IRP,40K(A) | Size | ISAT,10%(A) | ISAT,30%(A) | IR,40K(A) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TPC SMT Tiny Power Inductor, 1.2 µH, 2.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.2 µH | Rated Current2.6 A | Saturation Current3 A | Self Resonant Frequency180 MHz | MountSMT | DC Resistance42 mΩ | VersionSMT | – | Size2828 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 1.2 µH, 3.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.2 µH | Rated Current3.1 A | Saturation Current2.8 A | Self Resonant Frequency150 MHz | MountSMT | DC Resistance20 mΩ | – | – | Size4828 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 1.2 µH, 3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.2 µH | Rated Current3 A | Saturation Current3.5 A | Self Resonant Frequency120 MHz | MountSMT | DC Resistance30 mΩ | – | – | Size5818 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 1.2 µH, 4.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.2 µH | Rated Current4.8 A | Saturation Current4.2 A | Self Resonant Frequency150 MHz | MountSMT | DC Resistance16.5 mΩ | – | – | Size8020 | – | – | – | ||||
 | WE-SPC SMT Power Inductor, 1.2 µH, 3.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance1.2 µH | Rated Current3.2 A | Saturation Current5.5 A | Self Resonant Frequency82 MHz | MountSMT | DC Resistance26 mΩ | VersionSMT | – | Size4828 | – | – | – | ||||
 | WE-PD SMT Power Inductor, 1.2 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance1.2 µH | – | – | Self Resonant Frequency45 MHz | MountSMT | DC Resistance7 mΩ | VersionStandard | Performance Rated Current16.2 A | Size1280 | Saturation Current @ 10%21 A | Saturation Current @ 30%27 A | Rated Current13.5 A | ||||
| WE-TPC SMT Tiny Power Inductor, 1.5 µH, 1.75 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.5 µH | Rated Current1.75 A | Saturation Current1.55 A | Self Resonant Frequency125 MHz | MountSMT | DC Resistance47 mΩ | VersionSMT | – | Size3816 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 1.5 µH, 4.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.5 µH | Rated Current4.3 A | Saturation Current4 A | Self Resonant Frequency100 MHz | MountSMT | DC Resistance18 mΩ | – | – | Size6823 | – | – | – | ||||
 | WE-PD SMT Power Inductor, 1.5 µH, 10 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance1.5 µH | Rated Current10 A | Saturation Current12.5 A | Self Resonant Frequency69 MHz | MountSMT | DC Resistance6.6 mΩ | VersionPerformance | – | Size1050 | – | – | – | ||||
| WE-PD SMT Power Inductor, 1.5 µH, 4.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance1.5 µH | Rated Current4.3 A | – | Self Resonant Frequency75 MHz | MountSMT | DC Resistance18 mΩ | VersionRobust | Performance Rated Current6.4 A | Size7345 | Saturation Current @ 10%7.3 A | Saturation Current @ 30%9 A | Rated Current4.3 A | ||||
| WE-TPC SMT Tiny Power Inductor, 1.8 µH, 2.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.8 µH | Rated Current2.35 A | Saturation Current2.4 A | Self Resonant Frequency100 MHz | MountSMT | DC Resistance50 mΩ | VersionSMT | – | Size4818 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 1.8 µH, 2.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.8 µH | Rated Current2.7 A | Saturation Current2.45 A | Self Resonant Frequency120 MHz | MountSMT | DC Resistance25 mΩ | – | – | Size4828 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 1.8 µH, 2.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.8 µH | Rated Current2.6 A | Saturation Current3 A | Self Resonant Frequency100 MHz | MountSMT | DC Resistance35 mΩ | VersionSMT | – | Size5818 | – | – | – | ||||
| WE-PD SMT Power Inductor, 1.8 µH, 7.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance1.8 µH | Rated Current7.6 A | Saturation Current10.2 A | Self Resonant Frequency76 MHz | MountSMT | DC Resistance9.5 mΩ | VersionStandard | Performance Rated Current12.5 A | Size1245 | Saturation Current @ 10%10.2 A | Saturation Current @ 30%12 A | Rated Current7.6 A | ||||
| WE-TPC SMT Tiny Power Inductor, 2.2 µH, 2.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance2.2 µH | Rated Current2.5 A | Saturation Current2.35 A | Self Resonant Frequency100 MHz | MountSMT | DC Resistance28 mΩ | – | – | Size4828 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 2.2 µH, 3.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance2.2 µH | Rated Current3.4 A | Saturation Current2.7 A | Self Resonant Frequency70 MHz | MountSMT | DC Resistance24 mΩ | – | – | Size6823 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 2.2 µH, 2.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance2.2 µH | Rated Current2.8 A | Saturation Current2.85 A | Self Resonant Frequency50 MHz | MountSMT | DC Resistance45 mΩ | VersionSMT | – | Size8015 | – | – | – | ||||
 | WE-SPC SMT Power Inductor, 2.2 µH, 2.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance2.2 µH | Rated Current2.1 A | Saturation Current3.6 A | Self Resonant Frequency65 MHz | MountSMT | DC Resistance66 mΩ | VersionSMT | – | Size4818 | – | – | – | ||||
| WE-SPC SMT Power Inductor, 2.2 µH, 2.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance2.2 µH | Rated Current2.5 A | Saturation Current4 A | Self Resonant Frequency54 MHz | MountSMT | DC Resistance45 mΩ | VersionSMT | – | Size4828 | – | – | – | ||||
| WE-SPC SMT Power Inductor, 2.2 µH, 3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance2.2 µH | Rated Current3 A | Saturation Current4.6 A | Self Resonant Frequency85 MHz | MountSMT | DC Resistance30 mΩ | VersionSMT | – | Size4838 | – | – | – | ||||
| WE-PD SMT Power Inductor, 2.2 µH, 4.02 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance2.2 µH | Rated Current4.02 A | Saturation Current4.8 A | Self Resonant Frequency67 MHz | MountSMT | DC Resistance20 mΩ | VersionStandard | Performance Rated Current6.6 A | Size7332 | Saturation Current @ 10%4.8 A | Saturation Current @ 30%6 A | Rated Current4.02 A | ||||
| WE-PD SMT Power Inductor, 2.2 µH, 6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance2.2 µH | Rated Current6 A | Saturation Current6.5 A | Self Resonant Frequency60 MHz | MountSMT | DC Resistance20 mΩ | VersionStandard | Performance Rated Current6.9 A | Size7345 | Saturation Current @ 10%6.5 A | Saturation Current @ 30%8 A | Rated Current6 A | ||||
 | WE-PD SMT Power Inductor, 2.2 µH, 5.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance2.2 µH | Rated Current5.1 A | Saturation Current8.5 A | Self Resonant Frequency71 MHz | MountSMT | DC Resistance20 mΩ | VersionPerformance | – | Size1030 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 4.7 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance4.7 µH | Rated Current1.55 A | Saturation Current1.7 A | Self Resonant Frequency60 MHz | MountSMT | DC Resistance70 mΩ | – | – | Size4828 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 4.7 µH, 1.85 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance4.7 µH | Rated Current1.85 A | Saturation Current1.55 A | Self Resonant Frequency55 MHz | MountSMT | DC Resistance85 mΩ | – | – | Size8012 | – | – | – | ||||
| WE-SPC SMT Power Inductor, 4.7 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance4.7 µH | Rated Current1.55 A | Saturation Current2.9 A | Self Resonant Frequency38 MHz | MountSMT | DC Resistance103 mΩ | VersionSMT | – | Size4828 | – | – | – | ||||
| WE-SPC SMT Power Inductor, 4.7 µH, 2.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance4.7 µH | Rated Current2.2 A | Saturation Current3.2 A | Self Resonant Frequency44 MHz | MountSMT | DC Resistance52 mΩ | VersionSMT | – | Size4838 | – | – | – | ||||
| WE-PD SMT Power Inductor, 4.7 µH, 3.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | Rated Current3.2 A | Saturation Current4 A | Self Resonant Frequency37 MHz | MountSMT | DC Resistance40 mΩ | VersionStandard | Performance Rated Current4.9 A | Size7345 | Saturation Current @ 10%4 A | Saturation Current @ 30%5 A | Rated Current3.2 A | ||||
| WE-PD SMT Power Inductor, 4.7 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | – | – | Self Resonant Frequency31.2 MHz | MountSMT | DC Resistance12 mΩ | VersionStandard | Performance Rated Current11 A | Size1280 | Saturation Current @ 10%11 A | Saturation Current @ 30%14.3 A | Rated Current9.5 A | ||||
| WE-PD SMT Power Inductor, 4.7 µH, 2.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | Rated Current2.2 A | Saturation Current2.5 A | Self Resonant Frequency53 MHz | MountSMT | DC Resistance78 mΩ | VersionRobust | – | Size6033 | – | – | – | ||||
| WE-PD SMT Power Inductor, 4.7 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | – | Saturation Current2.8 A | Self Resonant Frequency60 MHz | MountSMT | DC Resistance65 mΩ | VersionRobust | Performance Rated Current2.8 A | Size6050 | Saturation Current @ 10%2.8 A | Saturation Current @ 30%3.7 A | Rated Current2.8 A | ||||
| WE-PD SMT Power Inductor, 6.1 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance6.1 µH | – | – | Self Resonant Frequency25 MHz | MountSMT | DC Resistance14 mΩ | VersionStandard | Performance Rated Current9.5 A | Size1280 | Saturation Current @ 10%9.5 A | Saturation Current @ 30%12.2 A | Rated Current8.5 A | ||||
 | WE-TPC SMT Tiny Power Inductor, 6.2 µH, 2.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance6.2 µH | Rated Current2.2 A | Saturation Current1.7 A | Self Resonant Frequency38 MHz | MountSMT | DC Resistance45 mΩ | VersionSMT | – | Size5828 | – | – | – | ||||
| WE-TPC SMT Tiny Power Inductor, 6.2 µH, 1.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance6.2 µH | Rated Current1.9 A | Saturation Current1.8 A | Self Resonant Frequency45 MHz | MountSMT | DC Resistance54 mΩ | – | – | Size6823 | – | – | – | ||||
 | WE-TPC SMT Tiny Power Inductor, 6.2 µH, 5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance6.2 µH | Rated Current5 A | Saturation Current4.5 A | Self Resonant Frequency25 MHz | MountSMT | DC Resistance24 mΩ | VersionSMT | – | Size1038 | – | – | – |