LTC1574_1 데이터 시트보기 (PDF) - Linear Technology
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LTC1574_1 Datasheet PDF : 8 Pages
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LTC1574
LTC1574-3.3/LTC1574-5
ABSOLUTE AXI U RATI GS
(Note 1)
(Voltage Referred to GND Pin)
Input Supply Voltage (Pin 5) ................. – 0.3V to 18.5V
Switch Current (Pin 3, 14) ........................................ 1A
Switch Voltage (Pin 3, 14) .......................... VIN – 18.5V
Operating Temperature Range .................... 0°C to 70°C
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NC 1
GND 2
SW 3
GND 4
VIN 5
IPGM 6
SHDN 7
NC 8
16 NC
15 GND
14 SW
13 GND
12 LBIN
11 LBOUT
10 VOUT (VFB*)
9 NC
S PACKAGE
16-LEAD PLASTIC SO
*ADJUSTABLE OUTPUT VERSION
TJMAX = 125°C, θJA = 110°C/W
ORDER PART
NUMBER
LTC1574CS
LTC1574CS-3.3
LTC1574CS-5
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 9V, SHDN = VIN, IPGM = 0V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
IFB
Feedback Current into Pin 10
VFB
Feedback Voltage
VOUT Regulated Output Voltage
LTC1574
LTC1574
LTC1574-3.3
LTC1574-5
1
q 1.20 1.25 1.30
q 3.14 3.30 3.46
q 4.75 5.00 5.25
∆VOUT Output Voltage Line
Regulation
VIN = 6V to 12V, ILOAD = 100mA, IPGM = VIN (Note 3)
10 70
Output Voltage Load
Regulation
LTC1574-3.3 (Note 3)
LTC1574-5 (Note 3)
20mA < ILOAD < 175mA, IPGM = 0V
20mA < ILOAD < 400mA, IPGM = VIN
20mA < ILOAD < 175mA, IPGM = 0V
20mA < ILOAD < 400mA, IPGM = VIN
– 5 – 70
– 45 – 70
– 5 – 70
– 50 – 70
IQ
Input DC Supply Current (Note 4)
Active Mode
4V < VIN < 16V, IPGM = 0V
Sleep Mode
4V < VIN < 16V
Shutdown (Note 5)
SHDN = 0V, 4V < VIN < 16V
450 600
130 180
2
25
VLBTRIP
ILBIN
ILBOUT
Low-Battery Trip Point
Current into Pin 12
Current Sunk by Pin 11
VHYST
IPEAK
Comparator Hysteresis
Current Limit
RON
ON Resistance of Switch
VLBOUT = 0.4V, VLBIN = 0V
VLBOUT = 5V, VLBIN = 10V
IPGM = VIN, VOUT = 0V
IPGM = 0V, VOUT = 0V
1.25 1.4
0.5
0.5 1.0 1.5
1.0
7.5 15 30
q 0.54 0.60 0.83
q 0.27 0.34 0.53
q
0.9 1.55
tOFF
Switch Off Time
VIH
SHDN Pin High
VIL
SHDN Pin Low
VOUT at Regulated Value
Minimum Voltage at Pin 7 for Device to Be Active
Maximum Voltage at Pin 7 for Device to Be in Shutdown
3
4
5
1.2
0.75
UNITS
µA
V
V
V
mV
mV
mV
mV
mV
µA
µA
µA
V
µA
mA
µA
mV
A
A
Ω
µs
V
V
2
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