LTC7852
LTC7852-1
RECOMMENDED FOR NEW DESIGNS
Dual Output, 6-Phase, Multiphase Current Mode Synchronous Controller with Current Monitoring
- Part Models
- 8
- 1ku List Price
- Starting From $3.87
Overview
- Sub-Milliohm DCR Sensing or DrMOS with Current Sense Improves Efficiency
- Operates with Power Blocks, DrMOS or External Gate Drivers and MOSFETs
- ±0.5% Total Output Voltage Accuracy
- Flexible Phase Configuration
- Dual Output Current Monitoring
- tON(MIN) = 40ns, Capable of Very Low Duty Cycles at High Frequency
- Dual Differential Remote Sensing Amplifiers
- Programmable Frequency Range of 250kHz to 1.2MHz
- VIN Range Is Not Limited by IC
- VCC Range: 4.5V to 5.5V
- VOUT Range: 0.5V to 2.0V
- 48 Lead (5mm × 6mm) GQFN for LTC7852
- 36 Lead (4mm × 5mm) QFN for LTC7852-1
The LTC7852/LTC7852-1 is a six-phase, dual output current mode synchronous step-down switching regulator controller that works in conjunction with external power train devices such as DrMOS, power blocks or discrete N-channel MOSFETs and associated gate drivers. Its flexible design enables 1-, 2-, 3-, 4-, 5-, and 6-phase configurations. The LTC7852 offers a unique feature that enhances the signal-to-noise ratio of the current sense signal, allowing the use of inductors with very low DC winding resistances for maximum efficiency. The controller achieves a minimum on-time of just 40ns, permitting the use of high switching frequency at high step-down ratios. 8-, 10- or 12 phases with two ICs can be paralleled for very high current requirements up to 400A.
The remote sense differential amplifiers and a precise reference provide accurate output voltages between 0.5V and 2.0V. The input voltage is not limited by the controller. Hiccup mode protection from output shorts or overcurrent minimizes the thermal dissipation.
The LTC7852-1 is designed specifically for DrMOS with an internal current sense signal.
APPLICATIONS
- Computer Systems
- Telecom and Datacom Systems
- DC Power Distribution Systems
Documentation
Data Sheet 1
Design Note 1
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC7852ERHE#PBF | 48-Lead GQFN (5mm x 6mm x 0.65mm w/ EP) | ||
| LTC7852ERHE#TRPBF | 48-Lead GQFN (5mm x 6mm x 0.65mm w/ EP) | ||
| LTC7852EUFD-1#PBF | 36-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC7852EUFD-1#TRPBF | 36-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC7852IRHE#PBF | 48-Lead GQFN (5mm x 6mm x 0.65mm w/ EP) | ||
| LTC7852IRHE#TRPBF | 48-Lead GQFN (5mm x 6mm x 0.65mm w/ EP) | ||
| LTC7852IUFD-1#PBF | 36-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC7852IUFD-1#TRPBF | 36-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC7852
- LTC7852-1
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC7852 Demo Board | Single or Dual Output
Resources
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