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LT1767 데이터시트(PDF) 2 Page - Linear Technology

부품명 LT1767
상세설명  Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators
PDF  16 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LT1767 데이터시트(HTML) 2 Page - Linear Technology

  LT1767 Datasheet HTML 1Page - Linear Technology LT1767 Datasheet HTML 2Page - Linear Technology LT1767 Datasheet HTML 3Page - Linear Technology LT1767 Datasheet HTML 4Page - Linear Technology LT1767 Datasheet HTML 5Page - Linear Technology LT1767 Datasheet HTML 6Page - Linear Technology LT1767 Datasheet HTML 7Page - Linear Technology LT1767 Datasheet HTML 8Page - Linear Technology LT1767 Datasheet HTML 9Page - Linear Technology Next Button
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LT1767/LT1767-1.8/
LT1767-2.5/LT1767-3.3/LT1767-5
sn1767 1767fas
ABSOLUTE MAXIMUM RATINGS
Input Voltage .......................................................... 25V
BOOST Pin Above SW ............................................ 20V
Max BOOST Pin Voltage .......................................... 35V
SHDN Pin ............................................................... 25V
FB Pin Voltage .......................................................... 6V
FB Pin Current ....................................................... 1mA
ELECTRICAL CHARACTERISTICS
(Note 1)
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
µA
q
45
µA
Feedback Voltage
3V < VIN < 25V, 0.4V < VC < 0.9V
LT1767 (Adj)
1.182
1.2
1.218
V
(Note 3)
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
µA
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.
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
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
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 = 110°C/W
LTLS
LTWG
LTWD
LTWE
LTWF
LT1767EMS8
LT1767EMS8-1.8
LT1767EMS8-2.5
LT1767EMS8-3.3
LT1767EMS8-5
GROUND PIN CONNECTED
TO LARGE COPPER AREA
MS8 PART MARKING
ORDER PART NUMBER
TJMAX = 125°C, θJA = 40°C/W
LT1767EMS8E
LT1767EMS8E-1.8
LT1767EMS8E-2.5
LT1767EMS8E-3.3
LT1767EMS8E-5
EXPOSED GND PAD
CONNECTED TO LARGE
COPPER AREA ON PCB
MS8E PART MARKING
LTZG
LTZH
LTZJ
LTZK
LTZL
1
2
3
4
BOOST
VIN
SW
GND
8
7
6
5
SYNC
VC
FB
SHDN
TOP VIEW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.



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