LTC3878
PRODUCTIONFast, Wide Operating Range No RSENSE Step-Down DC/DC Controller
- Part Models
- 4
- 1ku List Price
- Starting From $2.64
Overview
- Wide VIN Range: 4V to 38V
- ±1% 0.8V Voltage Reference
- Extremely Fast Transient Response
- tON(MIN): 43ns
- No RSENSE™ Valley Current Mode Control
- Stable with Low ESR Ceramic COUT
- Supports Smooth Start-Up Into Pre-Biased Output
- Optimized for High Step-Down Ratios
- Pin Compatible with the LTC1778 (No EXTVCC Pin)
- Power Good Output Voltage Monitor
- Dual N-Channel MOSFET Synchronous Drive
- Adjustable Switching Frequency
- Programmable Current Limit with Foldback
- Output Overvoltage Protection
- Small 16-Pin Narrow SSOP Package
The LTC3878 is a synchronous step-down switching DC/DC controller optimized for high switching frequency and fast transient response. The constant on-time valley current mode architecture allows for a wide input range, including very low duty factor operation. No external sense resistor or slope compensation is required. The LTC3878 is pin compatible with the LTC1778 in applications that do not use EXTVCC while offering better efficiency. Consult with the factory to verify compatibility.
Operating frequency is set by an external resistor and compensated for variations in VIN to offer excellent line stability. Discontinuous mode operation provides high efficiency during light load conditions. A forced continuous control pin allows the user to reduce noise and RF interference. Safety features include output overvoltage protection and programmable current limit with foldback. Soft-start capability for supply sequencing is accomplished through an external timing capacitor. The current limit is user programmable.
The LTC3878 allows operation from 4V to 38V at the input and from 0.8V to 90% VIN at the output. The LTC3878 is available in a small 16-pin narrow SSOP package.
Applications
- Distributed Power Systems
- Embedded Computing
- Communications Infrastructure
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Product Selector Card 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 |
|---|---|---|---|
| LTC3878EGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3878EGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3878IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3878IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC3878EGN#PBF | PRODUCTION | |
| LTC3878EGN#TRPBF | PRODUCTION | |
| LTC3878IGN#PBF | PRODUCTION | |
| LTC3878IGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC3878EGN#PBF | PRODUCTION | |
| LTC3878EGN#TRPBF | PRODUCTION | |
| LTC3878IGN#PBF | PRODUCTION | |
| LTC3878IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC3878EGN#PBF | PRODUCTION | |
| LTC3878EGN#TRPBF | PRODUCTION | |
| LTC3878IGN#PBF | PRODUCTION | |
| LTC3878IGN#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3878
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
LTC3878EGN Demo Board | No Rsense, 4.5V ≤ VIN ≤ 14V, VOUT = 1.2V @ 18A