IC CTRLR PWM STP-DN TRIPL 32WQFN

MAX15048ETJ+

Manufacturer Part NumberMAX15048ETJ+
DescriptionIC CTRLR PWM STP-DN TRIPL 32WQFN
ManufacturerMaxim Integrated Products
MAX15048ETJ+ datasheet
 


Specifications of MAX15048ETJ+

ApplicationsPower Supply Controller, SequencerVoltage - Supply4.7 V ~ 23 V
Current - Supply6mAOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case32-WQFN Exposed Pad
Number Of Outputs3Output Voltage5 V
Input Voltage4.7 V to 23 VSupply Current6 mA
Switching Frequency200 KHzMounting StyleSMD/SMT
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Lead Free Status / RoHS StatusLead free / RoHS CompliantVoltage - Input-
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Triple-Output Buck Controllers
with Tracking/Sequencing
As with the previous example, the actual gain and phase
response is overlaid on the power modulator’s asymp-
totic gain response. It is readily observed that the more
dramatic gain and phase transition at or near the power
modulator’s resonant frequency, f
response of the previous example. This is due to the
component’s lower parasitics leading to the higher fre-
quency of the inherent ESR zero of the output capacitor.
In this example, the desired crossover frequency occurs
below the ESR zero frequency.
In this example, a compensator with an inherent midfre-
quency double-zero response is required to mitigate the
effects of the filter’s double-pole. Such is available with
the Type III topology.
80
60
40
20
0
-20
-40
-60
-80
Figure 4d. Power Modulator (High-Quality C
24
_____________________________________________________________________________________
As demonstrated in Figure 4d, the Type III’s midfrequen-
cy double-zero gain (exhibiting a +20dB/decade slope,
noting the compensator’s pole at the origin) is designed
to compensate for the power modulator’s double-pole
, vs. the gentler
-40dB/decade attenuation at the desired crossover fre-
LC
quency, f
In the above example, the power modulator’s inherent
(midfrequency) -40dB/decade rolloff is mitigated by
the midfrequency double-zero’s +20dB/decade gain to
extend the active regulation gain bandwidth of the volt-
age regulator. As shown in Figure 4d, the net result is an
approximate doubling in the regulator’s gain bandwidth
while providing greater than 60° of phase margin (the
difference between G
at crossover, f
< G
E/A
|G
|
E/A
f
LC
fJ
< G
MOD
|G
|
MOD
FREQUENCY (Hz)
) and Type III Compensator Responses
OUT
(again, G
+ G
= 0dB at f
CO
E/A
MOD
and G
respective phases
E/A
MOD
).
CO
270
203
135
68
0
f
ZERO, ESR
-68
-135
-203
-270
).
CO