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LTM8053 Arkusz danych(PDF) 3 Page - Linear Technology

Numer części LTM8053
Szczegółowy opis  40VIN, 3.5A Step-Down Silent Switcher 關Module Regulator
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTM8053 Arkusz danych(HTML) 3 Page - Linear Technology

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LTM8053
3
8053fc
For more information www.linear.com/LTM8053
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, RUN = 2V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
VIN Rising
l
3.4
V
Output DC Voltage
RFB Open
RFB = 16.9k, VIN = 40V
0.97
15
V
V
Peak Output DC Current
VOUT = 3.3V, fSW = 1MHz
6
A
Quiescent Current Into VIN
RUN = 0V
BIAS = 0V, No Load, SYNC = 0V, Not Switching
3
300
µA
µA
Quiescent Current Into BIAS
BIAS = 5V, RUN = 0V
BIAS = 5V, No Load, SYNC = 0V, Not Switching
BIAS = 5V, VOUT = 3.3V, IOUT = 3.5A, fSW = 1MHz
1
275
12
µA
µA
mA
Line Regulation
5.5V < VIN < 36V, IOUT = 1A
0.5
%
Load Regulation
0.1A < IOUT < 3.5A
0.5
%
Output Voltage Ripple
IOUT = 3.5A
10
mV
Switching Frequency
RT = 232k
RT = 41.2k
RT = 10.7k
200
0.95
3
kHz
MHz
MHz
Voltage at FB
l
950
970
980
mV
Minimum BIAS Voltage
(Note 5)
3.2
V
RUN Threshold Voltage
0.9
1.06
V
RUN Current
1
µA
TR/SS Current
TR/SS = 0V
2
µA
TR/SS Pull-Down
TR/SS = 0.1V
200
PG Threshold Voltage at FB (Upper)
FB Falling (Note 6)
1.05
V
PG Threshold Voltage at FB (Lower)
FB Rising (Note 6)
0.89
V
PG Leakage Current
PG = 42V
1
µA
PG Sink Current
PG = 0.1V
150
µA
SYNC Threshold Voltage
Synchronization
0.4
1.5
V
SYNC Voltage
To Enable Spread Spectrum
2.9
4.2
V
SYNC Current
SYNC = 0V
35
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Unless otherwise noted, the absolute minimum voltage is zero.
Note 3: The LTM8053E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the full –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8053I is guaranteed to meet specifications over the full –40°C to
125°C internal operating temperature range. Note that the maximum
internal temperature is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
Note 4: The LTM8053 contains overtemperature protection that is
intended to protect the device during momentary overload conditions. The
internal temperature exceeds the maximum operating junction temperature
when the overtemperature protection is active. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
Note 5. Below this specified voltage, internal circuitry will draw power
from VIN.
Note 6. PG transitions from low to high.


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