EV2360DG-00B 查看數據表（PDF） - Monolithic Power Systems
零件编号
产品描述 (功能)
生产厂家
EV2360DG-00B Datasheet PDF : 8 Pages
| |||
TM
MP2360 – 1.8A, 24V, 1.4MHz STEP-DOWN CONVERTER
OPERATION
The MP2360 is a current mode buck regulator.
That is, the EA output voltage is proportional to
the peak inductor current.
At the beginning of a cycle, M1 is off. The EA
output voltage is higher than the current sense
amplifier output, and the current comparator’s
output is low. The rising edge of the 1.4 MHz
CLK signal sets the RS Flip-Flop. Its output
turns on M1 thus connecting the SW pin and
inductor to the input supply.
The increasing inductor current is sensed and
amplified by the Current Sense Amplifier. Ramp
compensation is summed to Current Sense
Amplifier output and compared to the Error
Amplifier output by the PWM Comparator.
When the sum of the Current Sense Amplifier
output and the Slope Compensation signal
exceeds the EA output voltage, the RS Flip-
Flop is reset and the M1 is turned off. The
external Schottky rectifier diode (D1) conducts
the inductor current.
If the sum of the Current Sense Amplifier output
and the Slope Compensation signal does not
exceed the EA output for a whole cycle, then
the falling edge of the CLK resets the Flip-Flop.
The output of the Error Amplifier integrates the
voltage difference between the feedback and
the 0.81V bandgap reference. The polarity is
such that a FB pin voltage lower than 0.8V
increases the EA output voltage. Since the EA
output voltage is proportional to the peak
inductor current, an increase in its voltage also
increases current delivered to the output.
IN
EN
FB
GND
D
CURRENT SENSE
AMPLIFIER
x20
REGULATOR
REFERENCE
OSCILLATOR
1.4MHz
1pF
27pF
-+-EA
ERROR
AMPLIFIER
REGULATOR
SQ
+
--
R
CURRENT
R
LIMIT
COMPARATOR
DRIVER
+
--
PWM
COMPARATOR
BST
M1
SW
Figure 1—Functional Block Diagram
MP2360 Rev. 0.9
www.MonolithicPower.com
5
8/21/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
Share Link: 