LTC1871-7
PRODUCTIONHigh Input Voltage, Current Mode Boost, Flyback and SEPIC Controller
- Part Models
- 4
- 1ku List Price
- Starting From $4.45
Overview
- Optimized for High Input Voltage Applications
- Wide Chip Supply Voltage Range: 6V to 36V
- Internal 7V Low Dropout Voltage Regulator Optimized for 6V-Rated MOSFETs
- Current Mode Control Provides Excellent Transient Response
- High Maximum Duty Cycle (92% Typ)
- ±2% RUN Pin Threshold with 100mV Hysteresis
- ±1% Internal Voltage Reference
- Micropower Shutdown: IQ = 10µA
- Programmable Operating Frequency (50kHz to 1MHz) with One External Resistor
- Synchronizable to an External Clock Up to 1.3 × fOSC
- User-Controlled Pulse Skip or Burst Mode® Operation
- Output Overvoltage Protection
- Can be Used in a No RSENSE™ Mode for VDS < 36V
- Small 10-Lead MSOP Package
The LTC1871-7 is a current mode, boost, flyback and SEPIC controller optimized for driving 6V-rated MOSFETs in high voltage applications. The LTC1871-7 works equally well in low or high power applications and requires few components to provide a complete power supply solution. The switching frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 6V and a low shutdown quiescent current of 10µA make the LTC1871-7 well suited for battery-operated systems. For applications requiring constant frequency operation, Burst Mode operation can be defeated using the MODE/SYNC pin. The LTC1871-7 is available in the 10-lead MSOP package.
| VIN Range | INTVCC | Features | |
| LTC1871 | 2.5V to 36V | 5.2V | - |
| LTC1871-1 | 2.5V to 36V | 5.2V | Lower Burst Mode Threshold (0.195V vs. 0.3V) |
| LTC1871-7 | 6V to 36V | 7V | Drives 6V Gate N-Channel MOSFETs |
| LTC1871X | 2.5V to 36V | 5.2V | 175°C Junction Temp, 100% Tested at 175°C |
Applications
- Telecom Power Supplies
- 42V Automotive Systems
- 24V Industrial Controls
- IP Phone Power Supplies
Documentation
Data Sheet 1
Design Note 2
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 |
|---|---|---|---|
| LTC1871EMS-7#PBF | 10-Lead MSOP | ||
| LTC1871EMS-7#TRPBF | 10-Lead MSOP | ||
| LTC1871IMS-7#PBF | 10-Lead MSOP | ||
| LTC1871IMS-7#TRPBF | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3) |
||
| LTC1871EMS-7#PBF | PRODUCTION | |
| LTC1871EMS-7#TRPBF | PRODUCTION | |
| LTC1871IMS-7#PBF | PRODUCTION | |
| LTC1871IMS-7#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1871EMS-7#PBF | PRODUCTION | |
| LTC1871EMS-7#TRPBF | PRODUCTION | |
| LTC1871IMS-7#PBF | PRODUCTION | |
| LTC1871IMS-7#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC1871
- LTC1871-1
- LTC1871-7
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.
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