MFG:Linear Technology Category:Integrated Circuits (ICs) Package Cooled:2108+06 D/C:New
LT1949IS8, LT195, LT1950 Datasheet download
Category: Integrated Circuits (ICs)
MFG: Linear Technology
Package Cooled: 2108+06
D/C: New
Description: IC CONV DC/DC PWM STEP UP 8SOIC
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PDF/DataSheet Download
Datasheet: LT1949IS8
File Size: 161917 KB
Manufacturer: LINER [Linear Technology]
Download : Click here to Download
PDF/DataSheet Download
Datasheet: LT1950
File Size: 273016 KB
Manufacturer: Linear
Download : Click here to Download
PDF/DataSheet Download
Datasheet: LT1950
File Size: 273016 KB
Manufacturer: Linear
Download : Click here to Download
| Technical/Catalog Information | LT1949IS8 |
| Vendor | Linear Technology |
| Category | Integrated Circuits (ICs) |
| Type | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Input | 1.7 ~ 12 V |
| Voltage - Output | Adj up to 28V |
| Current - Output | 1A |
| Power - Output | - |
| Package / Case | 8-SOIC (3.9mm Width) |
| Packaging | Bulk |
| Internal Switch(s) | Yes |
| Synchronous | No |
| Rds (On) | - |
| Operating Temperature | -40°C ~ 85°C |
| Frequency - Switching | 600kHz |
| Drawing Number | 161; 05-08-1610; S, S8; 8, 14, 16 |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | LT1949IS8 LT1949IS8 |
The LT®1950 is a wide input range, forward, boost, flyback and SEPIC controller that drives an N-channel powerMOSFET with few external components required.
A resistor programmable duty cycle clamp can be used to generate a volt-second clamp for forward converter applications. An internal boost switcher is available for creating a separate supply for the output gate driver, allowing 10V gate drive from input voltages as low as 3V. The LT1950's operating frequency can be set with an external resistor over a 100kHz to 500kHz range and a SYNC pin allows the part to be synchronized to an external clock. Additional programmability exists for leading edge blanking and slope compensation.
A fast current sense comparator achieves 60ns current sense delay and the error amplifier is a true voltage mode error amplifier, allowing a wide range of compensation networks. An accurate shutdown pin with programmable hysteresis is available for undervoltage lockout and shutdown. The LT1950 is available in a small 16-Pin SSOP package.
BOOST ........................................................ 0.3V to 35V
VIN, VIN2, SHDN .......................................... 0.3V to 25V
FB, SYNC, VSEC ............................................ 0.3V to 6V
COMP, BLANK ............................................ 0.3V to 3.5V
SLOPE ....................................................... 0.3V to 2.5V
ISENSE ......................................................... 0.3V to 1V
ROSC .................................................................... 50mA
VREF ..................................................................... 10mA
Operating Junction Temperature Range
LT1950EGN/LT1950IGN (Notes 2, 5) ... 40°C to 125°C
Storage Temperature Range ...............65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
· Wide Input Range: 3V to 25V
· Programmable Volt-Second Clamp
· Output Power Levels from 25W to 500W
· Auxiliary Boost Converter Provides 10V Gate Drive from VIN as Low as 3V
· Programmable Operating Frequency (100kHz to 500kHz) with One External Resistor
· Programmable Slope Compensation
· Programmable Leading Edge Blanking
· ±2% Internal 1.23V Reference
· Accurate Shutdown Pin Threshold with Programmable Hysteresis
· 60ns Current Sense Delay
· 2.5V Auxiliary Reference Output
· Synchronizable to an External Clock up to 1.5 • fOSC
· Current Mode Control
· Small 16-Pin SSOP Package
· Telecom Power Supplies
· Automotive Power Supplies
· Portable Electronic Equipment
· Isolated and Nonisolated DC/DC Converters
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