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LT1618 Datasheet(PDF) 2 Page - Linear Technology

Part # LT1618
Description  Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1618 Datasheet(HTML) 2 Page - Linear Technology

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LT1618
2
VIN, SHDN Voltage ................................................... 18V
SW Voltage .............................................................. 36V
ISP, ISN Voltage ...................................................... 36V
IADJ Voltage ............................................................... 6V
FB Voltage .............................................................. 1.5V
VC Voltage .............................................................. 1.5V
Junction Temperature ........................................... 125
°C
Operating Temperature Range (Note 2) .. – 40
°C to 85°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
MS10 PART
MARKING
TJMAX = 125°C, θJA = 160°C/W
Consult LTC marketing for parts specified with wider operating temperature ranges.
LT1618EMS
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 1.6V, VSHDN = 1.6V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage
1.6
18
V
Quiescent Current
VSHDN = 1.6V, Not Switching
1.8
2.7
mA
VSHDN = 0V
0.1
1
µA
Reference Voltage
Measured at FB Pin
1.250
1.263
1.276
V
q
1.243
1.263
1.283
V
Reference Voltage Line Regulation
1.6V < VIN < 18V
0.01
0.03
%/V
FB Pin Bias Current
VFB = 1.263V, VIN = 1.8V
q
±2
±12
nA
Error Amplifier Voltage Gain
180
V/V
Error Amplifier Transconductance
∆IC = ± 5µA
160
µmho
Error Amplifier Sink Current
VFB = 1.35V, VC = 1V
15
µA
Error Amplifier Source Current
VFB = 1.10V, VC = 1V
30
µA
Current Sense Voltage (ISP, ISN)
VFB = 0V, VIADJ = 0V
q
47.5
50
52.5
mV
ISP, ISN Pin Bias Currents (Note 3)
VISP = 1.85V, VISN = 1.80V, VIADJ = 0V
50
80
µA
(ISP, ISN) Common Mode Minimum Voltage
1.8
V
Switching Frequency
VFB = 1V
1.25
1.4
1.6
MHz
VFB = 0V
550
kHz
Maximum Switch Duty Cycle
q
88
92
%
Switch Current Limit
1.5
2.1
2.8
A
Switch VCESAT
ISW = 1A
200
260
mV
ORDER PART
NUMBER
LTNH
1
2
3
4
5
FB
ISN
ISP
IADJ
GND
10
9
8
7
6
VC
SHDN
VIN
SW
N/C
TOP VIEW
MS10 PACKAGE
10-LEAD PLASTIC MSOP



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