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LT1776CS8 数据表(PDF) 2 Page - Linear Technology

部件名 LT1776CS8
功能描述  Wide Input Range, High Efficiency, Step-Down Switching Regulator
PDF  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1776CS8 数据表(HTML) 2 Page - Linear Technology

  LT1776CS8 Datasheet HTML 1Page - Linear Technology LT1776CS8 Datasheet HTML 2Page - Linear Technology LT1776CS8 Datasheet HTML 3Page - Linear Technology LT1776CS8 Datasheet HTML 4Page - Linear Technology LT1776CS8 Datasheet HTML 5Page - Linear Technology LT1776CS8 Datasheet HTML 6Page - Linear Technology LT1776CS8 Datasheet HTML 7Page - Linear Technology LT1776CS8 Datasheet HTML 8Page - Linear Technology LT1776CS8 Datasheet HTML 9Page - Linear Technology Next Button
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LT1776
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (Note 5) .......................................... 60V
Switch Voltage (Note 5) ........................................... 60V
SHDN, SYNC Pin Voltage ........................................... 7V
VCC Pin Voltage ....................................................... 30V
FB Pin Voltage ........................................................... 3V
Operating Junction Temperature Range
LT1776C ................................................ 0
°C to 125°C
LT1776I ............................................ – 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
LT1776CN8
LT1776CS8
LT1776IN8
LT1776IS8
S8 PART MARKING
1776
1776I
Consult factory for Military grade parts.
VIN = 40V, VSW open, VCC = 5V, VC = 1.4V unless otherwise noted.
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supplies
VIN(MIN)
Minimum Input Voltage
6.7
7.0
V
q
7.4
V
Thermally Limited Continuous Operating Voltage
q
40
V
IVIN
VIN Supply Current
VC = 0V
620
800
µA
q
900
µA
IVCC
VCC Supply Current
VC = 0V
3.2
4.0
mA
q
5.0
mA
VVCC
VCC Dropout Voltage
(Note 2)
2.8
3.1
V
Shutdown Mode IVIN
VSHDN = 0V
30
50
µA
q
75
µA
Feedback Amplifier
VREF
Reference Voltage
1.225
1.240
1.255
V
q
1.215
1.265
V
IIN
FB Pin Input Bias Current
600
1500
nA
gm
Feedback Amplifier Transconductance
∆lc = ±10µA
400
650
1000
µmho
q
200
1500
µmho
ISRC, ISNK
Feedback Amplifier Source or Sink Current
60
100
170
µA
q
45
220
µA
VCL
Feedback Amplifier Clamp Voltage
2.0
V
Reference Voltage Line Regulation
12V
≤ VIN ≤ 60V
q
0.01
%/V
Voltage Gain
200
600
V/V
Output Switch
VON
Output Switch On Voltage
ISW = 0.5A
1.0
1.5
V
ILIM
Switch Current Limit
(Note 3)
q
0.55
0.70
1.0
A
Current Amplifier
Control Pin Threshold
Duty Cycle = 0%
0.9
1.1
1.25
V
Control Voltage to Switch Transconductance
2
A/V
TJMAX = 125°C, θJA = 130°C/ W (N8)
TJMAX = 125°C, θJA = 110°C/ W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
VC
FB
SYNC
VIN
SHDN
VCC
VSW
GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO



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