LTC1149 查看數據表（PDF） - Linear Technology
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LTC1149 Datasheet PDF : 20 Pages
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LTC1149
LTC1149-3.3/LTC1149-5
ABSOLUTE AXI U RATI GS
Input Supply Voltage (Pin 2)...................... – 15V to 60V
VCC Output Current (Pin 3) .................................. 50mA
VCC Input Voltage (Pin 5)........................................ 16V
Continuous Output Current (Pins 4, 13) .............. 50mA
Sense Voltages (Pins 8, 9)
VIN ≥ 12.7V .......................................... 13V to – 0.3V
VIN < 12.7V ............................. (VCC + 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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
PGATE 1
VIN 2
VCC 3
PDRIVE 4
VCC 5
CT 6
ITH 7
SENSE– 8
16 CAP
15 SHDN2
14 RGND
13 NGATE
12 PGND
11 SGND
10
VFB /
SHDN1*
9 SENSE+
N PACKAGE
S PACKAGE
16-LEAD PDIP 16-LEAD PLASTIC SO
*FIXED OUTPUT VERSIONS
TJMAX = 125°C, θJA = 70°C/ W (N)
TJMAX = 125°C, θJA = 110°C/ W (S)
ORDER PART
NUMBER
LTC1149CN
LTC1149CN-3.3
LTC1149CN-5
LTC1149CS
LTC1149CS-3.3
LTC1149CS-5
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 12V, V10 = 0V (Note 2), unless otherwise noted.
SYMBOL
V10
I10
VOUT
∆VOUT
I2
VCC
V2 – V3
VIN – V1
PARAMETER
Feedback Voltage (LTC1149 Only)
Feedback Current (LTC1149 Only)
Regulated Output Voltage
LTC1149-3.3
LTC1149-5
Output Voltage Line Regulation
Output Voltage Load Regulation
LTC1149-3.3
LTC1149-5
Burst Mode Output Ripple
Input DC Supply Current (Note 3)
Normal Mode
Burst Mode
Shutdown
Internal Regulator Voltage
(Sets MOSFET Gate Drive Levels)
VCC Dropout Voltage
P-Gate to Source Voltage (Off)
CONDITIONS
VIN = 9V
VIN = 9V
ILOAD = 700mA
ILOAD = 700mA
VIN = 9V to 48V, ILOAD = 50mA
5mA < ILOAD < 2A
5mA < ILOAD < 2A
ILOAD = 0A
VIN = 12V
VIN = 48V
VIN = 12V
VIN = 48V
VIN = 12V, V15 = 2V
VIN = 48V, V15 = 2V
VIN = 12V to 48V
I3 = 20mA
VIN = 5V, I3 = 10mA
VIN = 12V
VIN = 48V
MIN TYP MAX
q
1.21 1.25 1.29
q
0.2
1
q
3.23 3.33 3.43
q
4.9 5.05 5.2
– 40
0
40
q
40
65
q
60
100
50
2.0
2.8
2.2
3.0
0.6
0.9
0.8
1.1
135
170
300
390
q
9.75 10.25 11
200
250
q
– 0.2
0
q
– 0.2
0
UNITS
V
µA
V
V
mV
mV
mV
mVP-P
mA
mA
mA
mA
µA
µA
V
mV
V
V
2
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