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LTC1574 Arkusz danych(PDF) 2 Page - Linear Technology

Numer części LTC1574
Szczegółowy opis  High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode
PDF  8 Pages
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTC1574 Arkusz danych(HTML) 2 Page - Linear Technology

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



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