LT1309 Linear Technology, LT1309 Datasheet - Page 2

• Manufacturer Part Number: LT1309
• Description: 500kHz Micropower DC/DC Converter for Flash Memory
• Manufacturer: Linear Technology

A
LT1309
V
V
V
V
V
I
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
SYMBOL
I
f
DC
t
V
The
temperature range.
2
ELECTRICAL C
Q
OSC
ON
LIM
CESAT
CC
SW
SENSE
ON/OFF
SEL
BSOLUTE
Voltage ............................................................... 7V
Voltage .............................................................. 7V
Voltage ............................................................ 20V
denotes specifications which apply over the full operating
Voltage ............................................................. 7V
Voltage ....................................................... 20V
Voltage......................................................... 7V
PARAMETER
Quiescent Current
Quiescent Current, Shutdown
Input Voltage Range
Output Sense Voltage
Output Referred Comparator Hysteresis
Oscillator Frequency
Maximum Duty Cycle
Switch ON Time
Reference Line Regulation
Switch Saturation Voltage
Switch Leakage Current
Switch Current Limit
Soft Start Current
ON/OFF Input Voltage Low
ON/OFF Input Voltage High
ON/OFF Bias Current
Sense Pin Input Current
VPP VALID Threshold
VPP VALID Output Voltage Low
VPP VALID Output Voltage High
W
A
HARA TERISTICS
XI
W
U
C
W
R
A
TI
U
CONDITIONS
V
V
Current Limit Not Asserted
2V < V
I
V
V
V
Soft Start Grounded
V
V
V
V
V
I
I
SW
SINK
SOURCE
SENSE
ON/OFF
SW
IN
IN
ON/OFF
ON/OFF
ON/OFF
ON/OFF
SENSE
G
= 5V, Soft Start Floating
= 3V, Soft Start Floating
= 0.5A
= 12V, Switch Off
= 100 A
S
IN
= 12V
Rising (High to Low Transition)
T
= 0.2V
= 5V
= 3V
= 0V
= 0.2V
= 2.5 A
< 6V
A
= 25 C, V
PACKAGE/ORDER I FOR ATIO
Consult factory for Industrial and Military grade parts.
SOFT START
CC
= 5V, V
PGND
V
V
SW
CC
T
JMAX
1
2
3
4
ON/OFF
8-LEAD PLASTIC SO
= 150 C,
S8 PACKAGE
TOP VIEW
= 3V, unless otherwise noted.
JA
= 150 C/W
8
7
6
5
MIN
11.5
400
400
450
1.6
80
ON/OFF
SENSE
VPP VALID
GND
2
4
V
SENSE
U
0.06
16.0
50.0
0.13
TYP
650
500
230
600
650
1.7
0.1
4.5
12
35
85
80
8.0
0.1
0.1
– 200mV
9
S8 PART MARKING
ORDER PART
LT1309CS8
NUMBER
W
MAX
12.6
0.15
24.0
14.0
900
700
350
900
950
120
0.8
0.3
10
15
92
90
1.0
1309
6
1
UNITS
U
%/V
kHz
mV
mV
mA
mA
%
A
A
V
V
A
A
V
V
A
A
A
A
A
V
V
s