MC34701EK datasheet(9/38 Pages) FREESCALE

Il numero della parte	MC34701EK

Spiegazioni elettronici	1.5 A Switch-Mode Power Supply with Linear Regulator

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Produttore elettronici	FREESCALE [Freescale Semiconductor, Inc]

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Analog Integrated Circuit Device Data

Freescale Semiconductor

9

34701

ELECTRICAL CHARACTERISTICS

STATIC ELECTRICAL CHARACTERISTICS

ERROR AMPLIFIER (BUCK CONVERTER)

Input Impedance (11)

RIN

–

500

–

k

Ω

Output Impedance (11)

ROUT

–

150

–

Ω

DC Open Loop Gain (11)

AVOL

–80

–

dB

Gain Bandwidth Product (11)

GBW

–35

–

MHz

Slew Rate (11)

vSR

–

200

–

V/

µs

Output Voltage – High Level

VIN1 > 3.3 V, IOEA = -1.0 mA (11), (12)

VEA_OH

–2.0

–

V

Output Voltage – Low Level

IOEA = -1.0 mA (11), (12)

VEA_OL

–0.4

–

V

Oscillator Ramp (11)

VSCRamp

–0.5

–

V

OSCILLATOR

CLKSYN Pin (open) Low Level Output Voltage

IOL = +1.0 mA (13)

VOSC_OL

––

0.4

V

CLKSYN Pin (open) High Level Output Voltage

IOH = -1.0 mA (14)

VOSC_OH

VDDI

- 0.4 V

–

V

CLKSYN Pin (grounded) Input Voltage Threshold

VOSC_IH

1.2–2.0

V

CLKSYN Pin Pullup Resistance

RPU

60

–

240

k

Ω

Frequency Adjusting Reference Voltage

VFREQ

–1.26–

V

BOOST REGULATOR

Regulator Output Voltage

IBST = 20 mA, VIN1 = V

IN2 = 2.8 V to 6.0 V

VBST

7.3

7.7

8.3

V

Power MOSFET Q5 RDS(ON)(11)

IBD = 500 mA, TA = 25°C

RDS(ON)Q5

–

650

1000

m

Ω

Regulator Recommended Output Capacitor

CBST

–10

–

µF

Regulator Recommended Output Capacitor Maximum ESR

ESRCBST

–

100

–

m

Ω

Notes

11.

Design information only. This parameter is not production tested.

12.

IOEA Refers to Error Amplifier Output Current.

13.

IOL Refers to I/O Low Level

14.

IOH Refers to I/O High Level

Table 3. Static Electrical Characteristics (continued)

Characteristics noted under conditions -40°C ≤ TA ≤ 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using

the typical application circuit (see Figure 33) unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

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