Datasheet

2
LTC1149
LTC1149-3.3/LTC1149-5
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
Input Supply Voltage (Pin 2)...................... –15V to 60V
V
CC
Output Current (Pin 3) .................................. 50mA
V
CC
Input Voltage (Pin 5)........................................ 16V
Continuous Output Current (Pins 4, 13) .............. 50mA
Sense Voltages (Pins 8, 9)
V
IN
≥ 12.7V .......................................... 13V to –0.3V
V
IN
< 12.7V............................. (V
CC
+ 0.3V) to –0.3V
Shutdown Voltages (Pins 10, 15) ............................. 7V
Operating Temperature Range .................... 0°C to 70°C
Extended Commercial
Temperature Range ............................... –40°C to 85°C
Junction Temperature (Note 1)............................ 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
E
LECTR
IC
AL C CHARA TERIST
ICS
T
A
= 25°C, V
IN
= 12V, V
10
= 0V (Note 2), unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
10
Feedback Voltage (LTC1149 Only) V
IN
= 9V ● 1.21 1.25 1.29 V
I
10
Feedback Current (LTC1149 Only) ● 0.2 1 µA
V
OUT
Regulated Output Voltage V
IN
= 9V
LTC1149-3.3 I
LOAD
= 700mA ● 3.23 3.33 3.43 V
LTC1149-5 I
LOAD
= 700mA ● 4.9 5.05 5.2 V
∆V
OUT
Output Voltage Line Regulation V
IN
= 9V to 48V, I
LOAD
= 50mA –40 0 40 mV
Output Voltage Load Regulation
LTC1149-3.3 5mA < I
LOAD
< 2A ● 40 65 mV
LTC1149-5 5mA < I
LOAD
< 2A ● 60 100 mV
Burst Mode Output Ripple I
LOAD
= 0A 50 mV
P-P
I
2
Input DC Supply Current (Note 3)
Normal Mode V
IN
= 12V 2.0 2.8 mA
V
IN
= 48V 2.2 3.0 mA
Burst Mode V
IN
= 12V 0.6 0.9 mA
V
IN
= 48V 0.8 1.1 mA
Shutdown V
IN
= 12V, V
15
= 2V 135 170 µA
V
IN
= 48V, V
15
= 2V 300 390 µA
V
CC
Internal Regulator Voltage V
IN
= 12V to 48V ● 9.75 10.25 11 V
(Sets MOSFET Gate Drive Levels) I
3
= 20mA
V
2
– V
3
V
CC
Dropout Voltage V
IN
= 5V, I
3
= 10mA 200 250 mV
V
IN
– V
1
P-Gate to Source Voltage (Off) V
IN
= 12V ● –0.2 0 V
V
IN
= 48V ● –0.2 0 V
LTC1149CN
LTC1149CN-3.3
LTC1149CN-5
LTC1149CS
LTC1149CS-3.3
LTC1149CS-5
ORDER PART
NUMBER
Consult factory for Industrial and Military grade parts.
1
2
3
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5
6
7
8
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TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
N PACKAGE
16-LEAD PDIP
16
15
14
13
12
11
10
9
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PGATE
V
IN

V
CC

PDRIVE
V
CC

C
T

I
TH

SENSE
–
CAP
SHDN2
RGND
NGATE
PGND
SGND

SENSE
+
*FIXED OUTPUT VERSIONS
V
FB
/
SHDN1*
T
JMAX
= 125°C, θ
JA
= 70°C/ W (N)
T
JMAX
= 125°C, θ
JA
= 110°C/ W (S)