參數(shù)資料
型號(hào): LT1767EMS8#TR-1.8
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: 3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: PLASTIC, MSOP-8
文件頁(yè)數(shù): 9/16頁(yè)
文件大?。?/td> 232K
代理商: LT1767EMS8#TR-1.8
2
LT1767/LT1767-1.8/
LT1767-2.5/LT1767-3.3/LT1767-5
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Input Voltage .......................................................... 25V
BOOST Pin Above SW ............................................ 20V
Max BOOST Pin Voltage .......................................... 35V
SHDN Pin ............................................................... 25V
FB Pin Voltage .......................................................... 6V
FB Pin Current ....................................................... 1mA
SYNC Pin Current .................................................. 1mA
Operating Junction Temperature Range (Note 2)
LT1767E .......................................... – 40
°C to 125°C
Storage Temperature Range ................ – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER INFORMATION
W
U
ORDER PART NUMBER
(Note 1)
1
2
3
4
BOOST
VIN
SW
GND
8
7
6
5
SYNC
VC
FB
SHDN
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 200°C/W
Consult factory for parts specified with wider operating temperature ranges.
LTLS
LTWG
LTWD
LTWE
LTWF
MS8 PART MARKING
LT1767EMS8
LT1767EMS8-1.8
LT1767EMS8-2.5
LT1767EMS8-3.3
LT1767EMS8-5
GROUND PIN CONNECTED
TO LARGE COPPER AREA
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
Maximum Switch Current Limit
TA = 0°C to 125°C
1.5
2
3
A
TA = < 0°C
1.3
3
A
Oscillator Frequency
3.3V < VIN < 25V
1.1
1.25
1.4
MHz
q
1.1
1.5
MHz
Switch On Voltage Drop
ISW = –1.5A, 0°C ≤ TA ≤ 125°C and –1.3A, TA < 0°C
330
400
mV
q
500
mV
VIN Undervoltage Lockout
(Note 3)
q
2.47
2.6
2.73
V
VIN Supply Current
VFB = VNOM + 17%
q
1
1.3
mA
Shutdown Supply Current
VSHDN = 0V, VIN = 25V, VSW = 0V
6
20
A
q
45
A
Feedback Voltage
3V < VIN < 25V, 0.4V < VC < 0.9V
LT1767 (Adj)
1.182
1.2
1.218
V
q
1.176
1.224
V
LT1767-1.8
q
1.764
1.8
1.836
V
LT1767-2.5
q
2.45
2.5
2.55
V
LT1767-3.3
q
3.234
3.3
3.366
V
LT1767-5
q
4.9
5
5.1
V
FB Input Current
LT1767 (Adj)
q
– 0.25
– 0.5
A
FB Input Resistance
LT1767-1.8
q
10.5
15
21
k
LT1767-2.5
q
14.7
21
30
k
LT1767-3.3
q
19
27.5
39
k
LT1767-5
q
29
42
60
k
FB to VC Voltage Gain
0.4V < VC < 0.9V
150
350
FB to VC Transconductance
IVC = ±10A
q
500
850
1300
Mho
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = 15V, VC = 0.8V, Boost = VIN + 5V, SHDN, SYNC and switch open unless otherwise noted.
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