ltc1149-5 Linear Technology Corporation, ltc1149-5 Datasheet - Page 2

• Manufacturer Part Number: ltc1149-5
• Description: High Efficiency Synchronous Step-down Switching Regulators
• Manufacturer: Linear Technology Corporation

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