Datasheet
2
LT1339
sn1339 1339fas
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
12V
IN
= V
BOOST
= 12V, V
C
= 2V, TS = 0V, V
FB
= V
REF
= 1.25V, C
TG
= C
BG
= 3000pF, T
A
= 25°C unless otherwise noted.
E
LECTR
IC
AL C CHARA TERIST
ICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply and Protection
I
12VIN
DC Active Supply Current (Note 2) ● 14 20 mA
DC Standby Supply Current V
RUN/SHDN
< 0.5V ● 150 250 µA
I
BOOST
DC Active Supply Current (Note 2) 2.2 mA
DC Standby Supply Current V
RUN/SHDN
< 0.5V 0 µA
V
RUN/SHDN
Shutdown Rising Threshold ● 1.15 1.25 1.35 V
V
SSHYST
Shutdown Threshold Hysteresis 25 mV
I
SS
Soft Start Charge Current ● 4814µA
V
UVLO
Undervoltage Lockout Threshold - Falling ● 8.20 9.00 9.75 V
Undervoltage Lockout Threshold - Rising
● 9.35 9.95 V
Undervoltage Lockout Hysteresis
● 200 350 mV
5V Reference
V
REF5
5V Reference Voltage Line, Load and Temperature ● 4.75 5.00 5.25 V
5V Reference Line Regulation 10V ≤ 12V
IN
≤ 15V ● 3 5 mV/V
I
REF5
5V Reference Load Range - DC ● 10 mA
Pulse
● 20 mA
5V Reference Load Regulation 0 ≤ I
REF5
≤ 20mA ● –1.25 –2 V/A
I
SC
5V Reference Short-Circuit Current 45 mA
Supply Voltages
Power Supply Voltage (12V
IN
)...............–0.3V to 20V
Topside Supply Voltage (V
BOOST
)
V
TS
– 0.3V to V
TS
+ 20V (V
MAX
= 75V)
Topside Reference Pin Voltage (TS) ......–0.3V to 60V
Input Voltages
Sense Amplifier Input Common Mode...–0.3V to 60V
RUN/SHDN Pin Voltage ...................... –0.3V to 12V
IN
All Other Inputs .......................................–0.3V to 7V
Maximum Currents
5V Reference Output Current............................ 65mA
Maximum Temperatures
Operating Ambient Temperature Range
LT1339C ............................................ 0°C to 70°C
LT1339I......................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
(Note 1)
ORDER PART
NUMBER
LT1339CN
LT1339CSW
LT1339IN
LT1339ISW
TOP VIEW
N PACKAGE
20-LEAD PDIP
SW PACKAGE
20-LEAD PLASTIC SO WIDE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
SYNC
5V
REF
CT
SL/ADJ
I
AVG
SS
V
C
SGND
V
FB
V
REF
V
BOOST
TG
TS
12V
IN
BG
PGND
PHASE
RUN/SHDN
SENSE
–
SENSE
+
WU
U
PACKAGE
/
O
RDER I FOR ATIO
T
JMAX
= 125°C, θ
JA
= 70°C/W (N)
T
JMAX
= 125°C, θ
JA
= 85°C/W (SW)
Consult factory for Military grade parts.