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LT1111CS8 数据表(PDF) 2 Page - Linear Technology

部件名 LT1111CS8
功能描述  Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1111CS8 数据表(HTML) 2 Page - Linear Technology

  LT1111CS8 Datasheet HTML 1Page - Linear Technology LT1111CS8 Datasheet HTML 2Page - Linear Technology LT1111CS8 Datasheet HTML 3Page - Linear Technology LT1111CS8 Datasheet HTML 4Page - Linear Technology LT1111CS8 Datasheet HTML 5Page - Linear Technology LT1111CS8 Datasheet HTML 6Page - Linear Technology LT1111CS8 Datasheet HTML 7Page - Linear Technology LT1111CS8 Datasheet HTML 8Page - Linear Technology LT1111CS8 Datasheet HTML 9Page - Linear Technology Next Button
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2
LT1111
1111fd
A
G
A
U
A
R
BSOLUTEXI
TI
S
Operating Temperature Range
LT1111C ............................................... 0
°C to 70°C
LT1111I ......................................... – 40
°C to 105°C
LT1111M (OBSOLETE) ............. –55
°C to 125°C
Storage Temperature Range ................ – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
PACKAGE/ORDER I FOR ATIO
Supply Voltage (VIN) ............................................... 36V
SW1 Pin Voltage (VSW1) ......................................... 50V
SW2 Pin Voltage (VSW2) ............................ – 0.5V to VIN
Feedback Pin Voltage (LT1111) ............................. 5.5V
Switch Current ....................................................... 1.5A
Maximum Power Dissipation ............................ 500mW
ORDER PART
NUMBER
LT1111CN8
LT1111CN8-5
LT1111CN8-12
ORDER PART
NUMBER
LT1111CS8
LT1111CS8-5
LT1111CS8-12
LT1111IS8
TJMAX = 90°C, θJA = 130°C/W (N)
1
2
3
4
8
7
6
5
TOP VIEW
ILIM
VIN
SW1
SW2
FB (SENSE)*
SET
A0
GND
N8 PACKAGE
8-LEAD PLASTIC DIP
*FIXED VERSIONS
TJMAX = 90°C, θJA = 150°C/W
1
2
3
4
8
7
6
5
TOP VIEW
FB (SENSE)*
SET
A0
GND
ILIM
VIN
SW1
SW2
S8 PACKAGE
8-LEAD PLASTIC SO
*FIXED VERSION
ELECTRICAL C
C
HARA TERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.VIN = 3V, Military or Commercial Version
S8 PART MARKING
1111
11115
11111
1111I
(Note 1)
LT1111MJ8
LT1111MJ8-5
LT1111MJ8-12
J8 PACKAGE
8-LEAD CERAMIC DIP
TJMAX = 150°C, θJA = 120°C/W (J)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
OBSOLETE PACKAGE
Consider the N8 Package for Alternate Source
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
Switch OFF
300
400
µA
VIN
Input Voltage
Step-Up Mode
q
2.0
12.6
V
Step-Down Mode
q
30.0
V
Comparator Trip Point Voltage
LT1111 (Note 2)
q
1.20
1.25
1.30
V
VOUT
Output Sense Voltage
LT1111-5 (Note 3
q
4.75
5.00
5.25
V
LT1111-12 (Note 3)
q
11.40
12.00
12.60
V
Comparator Hysteresis
LT1111
q
8
12.5
mV
Output Hysteresis
LT1111-5
q
32
50
mV
LT1111-12
q
75
120
mV
fOSC
Oscillator Frequency
54
72
88
kHz
DC
Duty Cycle: Step-Up Mode
Full Load
43
50
59
%
Step-Down Mode
24
34
50
%
tON
Switch ON Time: Step-Up Mode
ILIM Tied to VIN
579
µs
Step-Down Mode
VOUT, = 5V, VIN = 12V
3.3
5
7.8
µs
VSAT
SW Saturation Voltage, Step-Up Mode
VIN = 3.0V, ISW = 650mA
0.5
0.65
V
VIN = 5.0V, ISW = 1A
0.8
1.0
V
SW Saturation Voltage, Step-Down Mode
VIN = 12V, ISW = 650mA
1.1
1.5
V



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