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MC34727BFCR2 数据表(PDF) 7 Page - Freescale Semiconductor, Inc

部件名 MC34727BFCR2
功能描述  600mA High Efficiency Low Quiescent Current Synchronous Buck Regulator With Z-mode
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MC34727BFCR2 数据表(HTML) 7 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
7
MC34727
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics
Characteristics noted under conditions; 2.7V
≤ VIN ≤ 5.5V, 0.8V ≤ VOUT ≤ 3.3V, -25oC ≤ TA ≤ 85oC, CIN = COUT = 4.7µF,
L1 = 4.7
µH(See Figure 1), unless otherwise noted. The typical specifications are measured at the following conditions;
TA = +25oC, VIN = 3.6V, fSW = 2.0MHz with the typical operating circuit (See Figure 1), unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
Switching Frequency(7)
fSW
1.8
2.0
2.2
MHz
Maximum Duty Cycle(8)
Measured from SW pin
DMAX
95
-
100
%
Internal Soft-start Timer
VOUT Rise Time
tS
-
2.0
-
ms
Notes
7.
fSW can be factory programmed to ±20% of nominal 2.0MHz.
8.
The maximum duty limits the range of output voltages achievable for a given input voltage.


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