LT1109CN8-12

Series: -
Number of Outputs: 1
PWM Type: -
Synchronous Rectifier: No
Operating Temperature: 0°C ~ 70°C
Type: Step-Up (Boost)
Current - Output: 100mA
Mounting Type: Through Hole
Package / Case: 8-DIP (0.300", 7.62mm)
Packaging: Tube
Supplier Device Package: 8-PDIP
Output Type: Fixed
Frequency - Switching: 120kHz
Voltage - Output: 12V
Manufacturer: Linear Technology
Voltage - Input: 3V, 5V


Features:

· Uses Off-the-Shelf Inductors
·Only 33mH Inductor Required
· Low Cost
· 3-Lead TO-92, SO8, or 8-Pin DIP
· Adjustable or Fixed 5V or 12V Output
· 120kHz Oscillator
· Only Three External Components Required
· 320mA IQ
· 1.6V Minimum Start-Up Voltage
· Logic Controlled Shutdown


Application

· Flash Memory VPP Generators
· 3V to 5V Converters
· 5V to 12V Converters
· Disk Drives
· PC Plug-In Cards
· Peripherals
· Battery-Powered Equipment


Pinout




Specifications

Supply Voltage (VOUT) ........................... 0.4V to 20V
SW Pin Voltage ........................................0.4V to 50V
SHUTDOWN Pin Voltage......................................... 6.0V
Maximum Power Dissipation ............................. 300mW
Operating Temperature Range ..................... 0 to 70
Storage Temperature Range ................. 65 to 150
Lead Temperature (Soldering, 10 sec.)................. 300
Switch Current ..................................................... 1.2A


Description

The LT1109 is a simple step-up DC/DC converter. Available in 8-pin SO, 3-lead TO-92 (fixed output only) or miniDIP packages, the devices require only three external components to construct a complete DC/DC converter. Current drain is just 320mA at no load, making the device ideal for cost-sensitive applications where standby current must be kept to a minimum.

The LT1109-5 can deliver 5V at 100mA from a 3V input and the LT1109-12 can deliver 12V at 60mA from a 5V input. The 8-pin versions also feature a logic controlled SHUTDOWN pin that turns off the oscillator when taken low. The gated-oscillator design requires no frequency compensation components. The high frequency 120kHz oscillator permits the use of small surface mount inductors and capacitors. For a 5V to 12V at 120mA converter, see the LT1109A. Foa a 5V to 12V at 200mA converter with 20mA shutdown current, see the LT1301.

Parameters:

Technical/Catalog Information	LT1109CN8-12
Vendor	Linear Technology
Category	Integrated Circuits (ICs)
Type	Step-Up (Boost)
Number of Outputs	1
Voltage - Input	3V, 5V
Voltage - Output	12V
Current - Output	100mA
Power - Output	300mW
Package / Case	8-DIP (300 mil)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	No
Rds (On)	-
Operating Temperature	0°C ~ 70°C
Frequency - Switching	120kHz
Drawing Number	161; 05-08-1510; N; 8
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	LT1109CN8 12 LT1109CN812