LT1109CS8-5 Linear Technology, LT1109CS8-5 Datasheet

IC DC/DC CONV FIXED OUT 5V 8SOIC

LT1109CS8-5

Manufacturer Part Number
LT1109CS8-5
Description
IC DC/DC CONV FIXED OUT 5V 8SOIC
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1109CS8-5

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
100mA
Frequency - Switching
120kHz
Voltage - Input
3V, 5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
300mW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1109CS8-5
Manufacturer:
LT
Quantity:
10 000
Part Number:
LT1109CS8-5
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1109CS8-5#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
* 8-PIN PACKAGE ONLY
MURATA-ERIE LQH4N330K (I
**C1 = MATSUO 267M1602226 OR EQUIVALENT
A
SHUTDOWN
FEATURE
TYPICAL
L1 = SUMIDA CD54-330LC (I
PPLICATI
Flash Memory VPP Generators
3V to 5V Converters
5V to 12V Converters
Disk Drives
PC Plug-In Cards
Peripherals
Battery-Powered Equipment
Uses Off-the-Shelf Inductors
Only 33 H 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
320 A I
1.6V Minimum Start-Up Voltage
Logic Controlled Shutdown
V
5V
IN
COILTRONICS CTX33-1 (80mA)
ISI LCS2414-330K (I
Flash Memory VPP Generator
PROGRAM
Q
All Surface Mount
1
7
33 H
L1
S
A
V
SHUTDOWN*
IN
LT1109CS8-12
O
PPLICATI
OUT
GND
OUT
U
SW
= 50mA)
3
4
S
= 80mA)
SENSE
MBRS120T3
OUT
= 50mA)
8
+
O
LT1109 • TA01
U
C1**
22 F
16V
V
12V
80mA
OUT
15
12
9
6
3
0
0
10
20 30 40 50 60 70 80 90
Adjustable and Fixed 5V, 12V
OUTPUT CURRENT (mA)
Output Voltage
D
The LT1109 is a simple step-up DC/DC converter. Avail-
able 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 320 A at no load, making the device
ideal for cost-sensitive applications where standby cur-
rent 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 induc-
tors and capacitors. For a 5V to 12V at 120mA converter,
see the LT1109A. Foa a 5V to 12V at 200mA converter
with 20 A shutdown current, see the LT1301.
ESCRIPTIO
V
IN
Micropower Low Cost
= 5V
LT1109 • TPC01
100
DC/DC Converter
U
SHUTDOWN
5V/DIV
5V/DIV
V
OUT
OV
Flash Memory Program Output
1ms/DIV
LT1109
LT1109 • TA02
1

Related parts for LT1109CS8-5

LT1109CS8-5 Summary of contents

Page 1

... Battery-Powered Equipment O TYPICAL A PPLICATI All Surface Mount Flash Memory VPP Generator L1 MBRS120T3 SENSE LT1109CS8- SHUTDOWN* GND 4 SHUTDOWN PROGRAM LT1109 • TA01 * 8-PIN PACKAGE ONLY L1 = SUMIDA CD54-330LC (I = 80mA) OUT COILTRONICS CTX33-1 (80mA) MURATA-ERIE LQH4N330K (I = 50mA) OUT ISI LCS2414-330K (I = 50mA) OUT **C1 = MATSUO 267M1602226 OR EQUIVALENT ...

Page 2

... NC GND PACKAGE 8-LEAD PLASTIC SOIC LT1109 • PO103 T = 100 C, = 150 C/W JMAX JA S8 PART ORDER PART NUMBER MARKING LT1109CS8 1109 LT1109CS8-5 10905 LT1109CS8-12 10912 (LT1109CN8, LT1109CS8), unless otherwise specified CONDITIONS Switch Off LT1109 LT1109- LT1109-12 12V IN LT1109 LT1109-5 LT1109-12 Full Load ...

Page 3

... TEMPERATURE (°C) LT1109 • TPC02 Duty Cycle –50 – 100 TEMPERATURE (°C) LT1109 • TPC05 (LT1109CN8, LT1109CS8), unless otherwise specified CONDITIONS V = 12V SW N8, S8 Package N8, S8 Package N8, S8 Package SHUTDOWN N8, S8 Package SHUTDOWN CE C HARA TERISTICS C Oscillator Frequency 130 128 126 124 ...

Page 4

LT1109 W U TYPICAL PERFOR A Minimum/Maximum Oscillator Frequency 160 150 140 130 120 110 100 90 80 2.5 4.0 5.5 6.0 2.0 3.0 3.5 4.5 ...

Page 5

U U LT1109 OPER The 8-pin versions of the LT1109 have separate pins for V and SENSE or FB and also have a SHUTDOWN pin. IN Separating the device V pin from the SENSE pin allows ...

Page 6

LT1109 PPLICATI FOR ATIO kept to 600mA or less. Higher switch currents will cause excessive drop across the switch resulting in reduced efficiency. In general, switch current should be held to as low a ...

Page 7

... LT1109 • TA07 LT1109 Converter 22 H CADDELL-BURNS 1N5818 7120-17 5V 100mA AT 3V INPUT 20mA AT 2V INPUT SW V OUT LT1109CZ 16V GND LT1109 • TA06 Converter with Shutdown L1 MBRS120T3 LT1109CS8-5 SDN SENSE 5V OUTPUT + GND 22 F 16V SHUTDOWN *L1 = SUMIDA CD54-220LC LT1109 • TA08 7 ...

Page 8

... NOM Z3 1191 LT/GP 1093 5K REV B • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 N8 0392 0.150 – 0.157 (3.810 – 3.988) SO8 0392 ...

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