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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 3-36 V |
| Switching frequency | 300-2000 kHz |
| Output 1 | 12 V / 1 A |
Description
Demonstration circuit DC3103A is a monolithic 4-Switch buck-boost voltage regulator featuring the LT®3942. It has been designed with an output voltage set to 12V with capability of delivering up to 1A when the input voltage is between 7V and 36V. The demonstration circuit continues operating with an input voltage as low as 3V with reduced output power capability. DC3103A is configured for 2MHz switching frequency with spread spectrum frequency modulation (SSFM) disabled. When enabled, SSFM adjusts the switching frequency of the LT3942 between 2MHz and 2.5MHz for improved EMI performance.
Features
- 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
- Constant Voltage and Constant Current Regulation
- Proprietary Peak-Buck Peak-Boost Current Mode
- 3V to 36V Input Voltage Range
- 0V to 36V Output Voltage Range
- ±1.5% Output Voltage Regulation
- ±3% Output Current Regulation
- 5000:1 External and 128:1 Internal PWM Dimming
- Open and Short LED Protection with Fault Reporting
- 300kHz to 2MHz Fixed Switching Frequency with
- External Frequency Synchronization
- Flicker-Free Spread Spectrum for Low EMI
- Available in 28-Lead QFN (4mm × 5mm)
- AEC-Q100 Qualified for Automotive Applications
Typical applications
- Voltage Regulator with Accurate Current Limit
- General Purpose LED Driver, Automotive and Industrial Lighting
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 | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74438336033 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-MAPI SMT Power Inductor | 3.3 | 2.9 | 5.35 | 99 | 39 | 80 | SMT | 2 | – | 2 | – | – | 2.2 | – | ||
 | 60800213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm Jumper with Test Point | – | – | – | – | – | – | – | 2 | – | – | Jumper | – | 3 | Bag | |
 | 62000621121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm THT Dual Pin Header | – | – | – | – | – | – | THT | 6 | Dual | – | Pin Header | Straight | 2 | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 74438336033 | SPEC | |
| 60800213421 | SPEC | – |
| 62000621121 | SPEC | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | VOP (V) | Mount | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples |
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