34727 datasheet(7/19 Pages) FREESCALE

Part #	34727

Description	600mA High Efficiency Low Quiescent Current Synchronous Buck Regulator With Z-mode

PDF	19 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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7 / 19 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

MC34727

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

100

Internal Soft-start Timer

VOUT Rise Time

2.0

Notes

fSW can be factory programmed to ±20% of nominal 2.0MHz.

The maximum duty limits the range of output voltages achievable for a given input voltage.

34727 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc