LT1961
PRODUCTION1.5A, 1.25MHz Step-Up Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $2.89
Overview
- 1.5A Switch in a Small MSOP-8 Package
- Constant 1.25MHz Switching Frequency
- Wide Operating Voltage Range: 3V to 25V
- High Efficiency 0.2Ω Switch
- 1.2V Feedback Reference Voltage
- 2% Overall Output Voltage Tolerance
- Uses Low Profile Surface Mount External Components
- Low Shutdown Current: 6µA
- Synchronizable from 1.5MHz to 2MHz
- Current-Mode Loop Control
- Constant Maximum Switch Current Rating at All Duty Cycles
- Thermally Enhanced Exposed Pad 8-Lead Plastic MSOP Package
The LT1961 is a 1.25MHz monolithic boost switching regulator. A high efficiency 1.5A, 0.2Ω switch is included on the die together with all the control circuitry required to complete a high frequency, current-mode switching regulator. Current-mode control provides fast transient response and excellent loop stability.
New design techniques achieve high efficiency at high switching frequencies over a wide operating voltage range. A low dropout internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li-Ion batteries. An operating supply current of 1mA maintains high efficiency, especially at lower output currents. Shutdown reduces quiescent current to 6µA. Maximum switch current remains constant at all duty cycles. Synchronization allows an external logic level signal to increase the internal oscillator from 1.5MHz to 2MHz.
The LT1961 is available in an exposed pad, 8-pin MSOP package. Full cycle-by-cycle switch current limit protection and thermal shutdown are provided. High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors.
Applications
- DSL Modems
- Portable Computers
- Battery-Powered Systems
- Distributed Power
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 1
Brochure 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 |
|---|---|---|---|
| LT1961EMS8E#PBF | 8-Lead MSOP w/ EP | ||
| LT1961EMS8E#TRPBF | 8-Lead MSOP w/ EP | ||
| LT1961IMS8E#PBF | 8-Lead MSOP w/ EP | ||
| LT1961IMS8E#TRPBF | 8-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT1961EMS8E#PBF | PRODUCTION | |
| LT1961EMS8E#TRPBF | PRODUCTION | |
| LT1961IMS8E#PBF | PRODUCTION | |
| LT1961IMS8E#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT1961EMS8E#PBF | PRODUCTION | |
| LT1961EMS8E#TRPBF | PRODUCTION | |
| LT1961IMS8E#PBF | PRODUCTION | |
| LT1961IMS8E#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LT1961
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
LT1961EMS8E | Adjustable Output Boost Regulator, +2.8V to 12V Input, +12VOUT