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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 9-55 V |
| Output 1 | 12 V / 6 A |
Description
Demonstration circuit 2931A is a buck-boost regulatorfeaturing the LTC®7878. The DC2931A operates from a 9V to 55V input voltage range and generates a 12V, 6A output. The LTC7878 has a precision voltage reference that can generate an output voltage with 1% tolerance over the full operating conditions. The 260kHz switching frequency operation results in a small and efficient circuit. The converter achieves over 97% efficiency with 6A load.The demonstration circuit can be easily modified to regulate output voltages from 1V to 70V.The DC2931A provides a high-performance, cost-effective solution for generating a 12V output. The LTC7878 data sheet gives a complete description of this part, its operation, and application information. Refer to it in conjunction with this demo manual.
Features
- Single Inductor Architecture Allows VIN Above, Below or Equal to the Regulated VOUT
- Synchronous Rectification: Up to 98% Efficiency
- Wide VIN Voltage Range: 5V to 70V
- ±1% Output Voltage Accuracy: 1V ≤ VOUT ≤ 70V n DCR or RSENSE Current Sensing
- Peak Current Mode Control in Buck/Boost/BuckBoost Mode
- Programmable Input or Output Current Regulation n 7V NMOS Gate Drivers
- Phase-Lockable Frequency (100kHz to 600kHz)
- Multiphase/Multi-ICs Parallel Operation
- Selectable Continuous or Pulse-Skipping Mode Operation and Inductor Peak Current Limits
- Small 32-Lead 5mm × 5mm QFN Package
Typical applications
- Distributed DC Power or Battery Systems
- Industrial and Telecom Systems
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC max. (mΩ) | fres (MHz) | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012206046 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 16 V(DC) | 100 nF | ±10% | 16 | 0603 | -55 °C up to +125 °C | 3.5 | 5 GΩ | X7R Class II | 1.6 | 0.8 | 0.4 | – | – | – | – | – | – | – | – | 0.8 | – | – | – | 7" Tape & Reel | ||
 | 7443630420 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCF SMT High Current Inductor | – | – | – | 2013 | -40 °C up to +125 °C | – | – | – | 20.8 | 20.5 | – | 4.2 | 27 | 34 | 38 | 3.34 | 24 | 2 | – | 13.5 | – | – | 27 | – | ||
 | 60800213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm Jumper with Test Point | – | – | – | – | -25 °C up to +105 °C | – | 1000 MΩ | – | – | – | – | – | – | – | – | – | – | 2 | – | – | Jumper | – | 3 | Bag | |
 | 62000311121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm THT Pin Header | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | 6 | – | – | – | – | – | – | – | – | 3 | Single | – | Pin Header | Straight | 2 | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012206046 | SPEC | |
| 7443630420 | SPEC | |
| 60800213421 | SPEC | – |
| 62000311121 | SPEC | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC max. (mΩ) | fres (MHz) | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples |
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