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Analog Devices LTC7103-1
105V, 2.3A Low EMI Synchronous Step-Down Regulator with Fast Current Programming
Overview
| Topology | Buck Converter |
| Input voltage | 4.4-105 V |
| Switching frequency | 200-2000 kHz |
| Output 1 | 2.3 A |
Description
The LTC7103-1 is a high efficiency, monolithic synchro-nous step-down DC/DC converter utilizing a constant frequency, average current mode control architecture. It operates from an input voltage range of 4.4V to 105V and provides an adjustable regulated output voltage from 1V to VIN while delivering up to 2.3A of output current.
Features
- Wide VIN Range: 4.4V to 105V (110V Abs Max)
- Ultralow EMI/EMC Emissions: CISPR 25 Compliant
- 2μA IQ When Regulating 48VIN to 3.3VOUT
- Fast and Accurate Output Current Programming and Monitoring with No External RSENSE
- Brick Wall Current Limit
- Low Minimum On-Time: 40ns
- Wide VOUT Range: 1V to VIN
- PassThru™/100% Duty Cycle Capable
- Programmable Fixed Frequency: 200kHz to 2MHz
- Eight, Pin-Selectable Fixed (1.2V to 15V) or Adjustable Output Voltages
- Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode® Operation at Light Loads
- PLL Synchronization to External Clock
- EXTVCC LDO Powers Chip from VOUT = 3.3V to 40V
- OPTI-LOOP® or Fixed Internal Compensation
- Input and Output Overvoltage Protection
- Thermally Enhanced (5mm × 6mm) QFN Package
- AEC-Q100 Qualification in Process
Typical applications
- Medical Instruments and Telecommunication
- Automotive and Military Systems
- Industrial, Avionics and Heavy Equipment
- Battery Chargers and CC/CV Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | Material | IR,40K(A) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD SMT Power Inductor, 12 µH, 7.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance12 µH | Performance Rated Current7.4 A | Saturation Current4.9 A | DC Resistance26 mΩ | Self Resonant Frequency19.7 MHz | Size1260 | VersionStandard | Saturation Current @ 10%4.9 A | Saturation Current @ 30%6.4 A | – | – | Rated Current4.5 A | ||||
 | WE-HCI SMT Flat Wire High Current Inductor, 18 µH, 7.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance18 µH | Performance Rated Current7.4 A | – | DC Resistance24200 mΩ | Self Resonant Frequency16 MHz | Size1365 | VersionSMT | Saturation Current @ 10%3.5 A | Saturation Current @ 30%7.5 A | DC Resistance22 mΩ | MaterialWE-PERM | – | ||||
| WE-PD SMT Power Inductor, 33 µH, 3.65 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance33 µH | Performance Rated Current3.65 A | Saturation Current2.5 A | DC Resistance85 mΩ | Self Resonant Frequency13 MHz | Size1245 | VersionStandard | Saturation Current @ 10%2.5 A | Saturation Current @ 30%3 A | – | – | Rated Current2.3 A | ||||
| WE-PD SMT Power Inductor, 47 µH, 4.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance47 µH | Performance Rated Current4.9 A | – | DC Resistance60 mΩ | Self Resonant Frequency6.5 MHz | Size1210 | VersionStandard | Saturation Current @ 10%4.5 A | Saturation Current @ 30%5.5 A | – | – | Rated Current3.8 A |