參數(shù)資料
型號: MXL1076
英文描述: 5A/2A.Step-Down.PWM.Switch-Mode DC-DC Regulators
中文描述: 5A/2A.Step-Down.PWM.Switch-Mode的DC - DC穩(wěn)壓器
文件頁數(shù): 3/4頁
文件大小: 42K
代理商: MXL1076
Note 1:
Do not exceed switch-to-input voltage limitation.
Note 2:
For switch currents between 1A and 5A, maximum switch on voltage can be calculated via linear interpolation.
Note 3:
By setting the feedback pin (FB) to 2.5V, the V
C
pin is forced to its low clamp level and the switch duty cycle is forced to
zero, approximating the zero load condition.
Note 4:
For proper regulation, total voltage from V
IN
to ground must be
8V after start-up.
Note 5:
To avoid extremely short switch-on times, the switch frequency is internally scaled down when V
FB
is less than 1.3V. Switch
current limit is tested with V
FB
adjusted to give a 1μs minimum switch-on time.
Note 6:
Guaranteed, not production tested.
M
5A/2A S tep-Down, PWM,
S witc h-Mode DC-DC Regulators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 25V, T
j
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
T
j
= +25°C
Error-Amplifier Voltage Gain
Error-Amplifier
Transconductance
Error-Amplifier Source Current
1V
V
C
4V
2000
V/V
°C/W
2.5
MXL1074
4.0
MXL1076
Thermal Resistance J unction
to Case (Note 6)
V
1.5
T
j
= +25°C
T
j
= T
MIN
to T
MAX
±0.5
±1.5
T
j
= +25°C
VREF (nominal) = 2.21V
mV/°C
-4
V
C
Voltage at 0% Duty Cycle
%/V
0.005
0.02
8V
V
IN
40V
Reference Voltage Line
Regulation
%
±1
±2.5
All conditions of input voltage, output voltage,
temperature and load current
Reference Voltage Tolerance
V
2.155
2.210
2.265
V
C
= 2V
Reference Voltage
μA
0.5
2
V
FB
= VREF
Feedback Pin Bias Current
mA
0.6
1.0
1.7
T
j
= +25°C
V
FB
= 2.5V
Error-Amplifier Sink Current
μA
100
140
225
T
j
= +25°C
V
FB
= 2V
μmho
3000
5000
9000
T
j
= +25°C
UNITS
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