參數(shù)資料
型號(hào): LT1076MK
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Synchronous 4-Bit Binary Counters 16-SOIC 0 to 70
中文描述: 3.2 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, MBFM4
封裝: METAL CAN, TO-3, 4 PIN
文件頁數(shù): 3/4頁
文件大?。?/td> 170K
代理商: LT1076MK
3
LT1076-5
ELECTRICAL C
HARA TERISTICS
T
J
= 25
°
C, V
IN
= 25V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switching Frequency
90
85
100
110
120
kHz
kHz
kHz
T
J
125
°
C
V
OUT
= V
SENSE
= 0V (Note 4)
8V
V
IN
V
MAX
(Note 7)
1V
V
C
4V
G
20
Switching Frequency Line Regulation
G
0.03
0.1
%/V
Error Amplifier Voltage Gain (Note 7)
2000
V/V
Error Amplifier Transconductance (Note 7)
3700
5000
8000
μ
mho
Error Amplifier Source and Sink Current
Source (V
SENSE
= 4.5V)
Sink (V
SENSE
= 5.5V)
100
0.7
140
1.0
225
1.6
μ
A
mA
Sense Pin Divider Resistance
3
5
8
k
Sense Voltage
V
C
= 2V
V
OUT
(Nominal) = 5V
All Conditions of Input Voltage, Output Voltage,
Temperature and Load Current
G
4.85
5
5.15
V
Output Voltage Tolerance
±
0.5
±
1.0
±
2
±
3
%
%
G
Output Voltage Line Regulation
8V
V
IN
V
MAX
(Note 6)
G
0.005
0.02
%/V
V
C
Voltage at 0% Duty Cycle
1.5
–4.0
V
Over Temperature
G
mV/
°
C
Multiplier Reference Voltage
24
V
Shutdown Pin Current
V
SHDN
= 5V
V
SHDN
V
THRESHOLD
(
2.5V)
Switch Duty Cycle = 0
Fully Shut Down
5
10
20
50
μ
A
μ
A
Shutdown Thresholds
2.2
0.1
2.45
0.30
2.7
0.5
V
V
Thermal Resistance Junction to Case
4
°
C/W
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
To calculate maximum switch “on” voltage at currents between
low and high conditions, a linear interpolation may be used.
Note 2:
A sense pin voltage (V
SENSE
) of 5.5V forces the V
C
pin to its low
clamp level and the switch duty cycle to zero. This approximates the zero
load condition where duty cycle approaches zero.
Note 3:
Total voltage from V
IN
pin to ground pin must be
8V after start-
up for proper regulation. For T
A
< 25
°
C, limit = 5V.
Note 4:
Switch frequency is internally scaled down when the sense pin
voltage is less than 2.6V to avoid extremely short switch on times. During
current limit testing, V
SENSE
is adjusted to give a minimum switch on time
of 1
μ
s.
Note 5:
Switch to input voltage limitation must also be observed.
Note 6:
V
MAX
= 40V for the LT1076-5 and 60V for the LT1076HV-5.
Note 7:
Error amplifier voltage gain and transconductance are specified
relative to the internal feedback node. To calculate gain and
transconductance from the Sense pin (Output) to the V
C
pin, multiply by
0.44.
Note 8:
Does not include switch leakage.
Note 9:
I
LIM
R
LIM
– 1k
5k
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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