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LT3437IDD датащи(PDF) 3 Page - Linear Technology

номер детали LT3437IDD
подробное описание детали  High Voltage 500mA, 200kHz Step-Down Switching Regulator with 100關A Quiescent Current
PDF  28 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3437IDD датащи(HTML) 3 Page - Linear Technology

  LT3437IDD Datasheet HTML 1Page - Linear Technology LT3437IDD Datasheet HTML 2Page - Linear Technology LT3437IDD Datasheet HTML 3Page - Linear Technology LT3437IDD Datasheet HTML 4Page - Linear Technology LT3437IDD Datasheet HTML 5Page - Linear Technology LT3437IDD Datasheet HTML 6Page - Linear Technology LT3437IDD Datasheet HTML 7Page - Linear Technology LT3437IDD Datasheet HTML 8Page - Linear Technology LT3437IDD Datasheet HTML 9Page - Linear Technology Next Button
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LT3437
3437fc
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IVIN
Supply Quiescent Current
BIAS = 0V, FB = 1.15V, VC = 0.8V, SYNC = 2V
1.35
2
mA
BIAS = 5V, FB = 1.15V, VC = 0.8V, SYNC = 2V
0.475
1
mA
Minimum BIAS Voltage (Note 5)
2.7
3.15
V
IBIASS
BIAS Sleep Current (Note 4)
●
110
180
µA
IBIAS
BIAS Quiescent Current
SYNC = 2V
0.75
1
mA
Minimum Boost Voltage (Note 6)
ISW = 500mA
1.8
2.5
V
Input Boost Current (Note 7)
ISW = 0.5A
11
16
mA
ISW = 0.25A
8
13
mA
VREF
Reference Voltage (VREF)
3.3V < VVIN < 80V
●
1.225
1.25
1.275
V
IFB
FB Input Bias Current
50
200
nA
EA Voltage Gain (Note 8)
900
V/V
EA Voltage gm
dI(VC)= ±10µA
650
µMho
EA Source Current
FB = 1.15V
15
35
55
µA
EA Sink Current
FB = 1.35V
15
30
55
µA
VC to SW gm
1A/V
VC Switching Threshold
VSYNC = 2V
500
mV
VC High Clamp
1.5
1.75
2.1
V
IPK
SW Current Limit
●
500
650
900
mA
SW VCESAT
Switch Saturation Voltage
ISW = 250mA
●
200
400
mV
(Note 9)
ISW = 500mA
●
400
800
mV
Switching Frequency
●
165
200
240
kHz
Maximum Duty Cycle
95
%
Minimum SYNC Amplitude
1.5
2
V
SYNC Frequency Range
240
700
kHz
SYNC Input Impedance
50
k
Ω
ICSS
CSS Current Threshold (Note 10)
FB = 0V
4
10
16
µA
The
● denotes the specifications which apply over the –40
°C to 125°C
temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, SHDN = 12V, BIAS = 5V, FB = 1.25V, CSS/SYNC = 0V unless
otherwise noted.
ELECTRICAL CHARACTERISTICS
The
● denotes the specifications which apply over the –40
°C to 140°C
temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, SHDN = 12V, BIAS = 5V, FB = 1.25V, CSS/SYNC = 0V unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VSHDN
SHDN Threshold
●
1.1
1.3
1.5
V
ISHDN
SHDN Input Current
SHDN = 12V
●
530
µA
Minimum Input Voltage (Note 3)
●
2.5
3.5
V
IVINS
Supply Shutdown Current
SHDN = 0V, BOOST = 0V, FB/PGFB = 0V, BIAS = 0V
0.1
2
µA
Supply Sleep Current (Note 4)
BIAS = 0V, FB = 1.35V
●
150
300
µA
FB = 1.35V
●
45
75
µA
ELECTRICAL CHARACTERISTICS



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