LT1309CS8

VCC Voltage ............................................................... 7V
VSW Voltage ............................................................ 20V
VSENSE Voltage ....................................................... 20V
VON/OFF Voltage......................................................... 7V
VSEL Voltage ............................................................. 7V
ILIM Voltage .............................................................. 7V
Maximum Power Dissipation ............................ 500mW
Operating Temperature Range .................. 0°C to 70°C
Storage Temperature Range ............... 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

The LT ®1309 is a 500kHz micropower DC/DC converter for Flash Memory. The regulator features Burst ModeTM operation with a 0.5A, 300mV switch, enabling 85% efficiency at the fixed 12V output. High frequency operation permits the use of small value, and therefore small size, surface mount inductors and capacitors.

The LT1309 comes in an 8-lead SO package allowing extremely compact PC board layouts. These features make the device attractive for PCMCIA cards, cellular phones and other applications where PC board space is limited. Quiescent current is 650mA decreasing to 9mA when the part shuts down. The device includes a soft start feature which limits supply current transients during turn-on. 

The LT1309 contains a VPP VALID comparator with a logic output that goes low when the output voltage is ready to program 12V Flash Memory. This comparator simplifies the interface to external control logic.



Parameters: 

Technical/Catalog Information
LT1309CS8
Vendor
Linear Technology
Category
Integrated Circuits (ICs) 
  
Type
Step-Up (Boost)
Number of Outputs
1
Voltage - Input
2 ~ 6 V
Voltage - Output
12V
Current - Output
60mA
Power - Output
500mW
Package / Case
8-SOIC (3.9mm Width) 
Packaging
Bulk
Internal Switch(s)
Yes
Synchronous
No
Rds (On)
-
Operating Temperature
0°C ~ 70°C
Frequency - Switching
500kHz
Drawing Number
161; 05-08-1610; S, S8; 8, 14, 16
  
Lead Free Status
Contains Lead
  
RoHS Status
RoHS Non-Compliant
 
  
Other Names
  
            LT1309CS8
      LT1309CS8