Rainbow-electronics MAX5097 Bedienungsanleitung Seite 3

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Seitenansicht 2
MAX5096/MAX5097
40V, 600mA Buck Converters with Low-
Quiescent-Current Linear Regulator Mode
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +14V, I
OUT
= 1mA, C
IN
= 100µF, C
OUT
= 22µF, L = 22µH, C
BP
= 1µF, V
EN
= +2.4V (Figure 2), SGND = PGND = 0V, T
A
= T
J
=
-40°C to +125°C, unless otherwise noted. Typical values are at T
A
= T
J
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
BUCK MODE
Supply Current
(Buck Converter On)
I
S
LDO/BUCK = low,
V
ADJ
= 1.4V, MAX5096,
no switching
135kHz
version
693
980 µA
Supply Current
(Buck Converter On)
I
S
LDO/BUCK = low,
V
ADJ
= 1.4V, MAX5097,
no switching
330kHz
Version
720 1000
µA
5V version, 5.5V V
IN
40V, no load
4.85
5
5.12
Fixed Output Voltage V
OUT
3.3V version, 5.5V V
IN
40V, no load
3.196
3.3
3.391
V
ADJ Set Point V
FB
50% duty cycle, no load
1.189 1.237 1.280
V
ADJ Input Bias Current I
FB
V
ADJ
= 1.5V 5 100 nA
V
ADJTH_R
ADJ rising
125
Dual Mode ADJ Threshold
V
ADJTH_F
ADJ falling 62
mV
Maximum Duty Cycle D
MAX
V
ADJ
= 0.5V
100
%
Error Amplifier Transconductance
Gm
EA
V
COMP
= V
ADJ
, I
COMP
= ±10µA 55
136
210 µS
Adjustable Output Voltage Range
V
ADJ
1.237 11.000
V
Minimum Output Current I
OUT
V
IN
= 6.5V to 40V
600
mA
Switch Current Limit
I
SW_LIM
V
IN
= 6V to 40V
1.15
1.5
1.90
A
Internal Switch On-Resistance
R
DS
(
ON
)
V
IN
= 14V, I
DRAIN
= 100mA 0.9 2.1
Switch Leakage Current I
SW_L
V
IN
= 40V, V
ADJ
= 1.5V
0.05
A
V
IN
= 14V, V
OUT
= 5V, I
OUT
= 400mA 85
Efficiency η
V
IN
= 14V, V
OUT
= 3.3V, I
OUT
= 400mA 81
%
MAX5096
120 135
148 kHz
Switching Frequency f
SW
MAX5097
300 330
350 kHz
MAX5096
120
500 kHz
Synchronization SYNC Input f
SYNC
MAX5097
300
500 kHz
SYNC Input High Threshold
V
SYNCH
V
BP
= 4V 2.0 V
SYNC Input Low Threshold
V
SYNCL
V
BP
= 4V 0.8 V
SYNC Input Minimum High Pulse
Width
250
ns
SYNC Input Leakage V
SYNC
=11V 1 µA
LDO MODE
Guaranteed Output Current I
OUT
(Note 2)
100
mA
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