34702 datasheet(9/38 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34702

ELECTRICAL CHARACTERISTICS

STATIC ELECTRICAL CHARACTERISTICS

ERROR AMPLIFIER (BUCK CONVERTER)

Input Impedance (11)

ROUT

–

150

–

Ω

Output Impedance (11)

AVOL

–

DC Open Loop Gain (11)

GBW

–

MHz

Gain Bandwidth Product (11)

–

200

–

µs

Slew Rate (11)

VEA_OH

–2.0

–

Output Voltage – High Level

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

VEA_OL

–0.4

–

Output Voltage – Low Level

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

VSCRamp

–0.5

–

Oscillator Ramp (11)

VSCRamp

–0.5

–

OSCILLATOR

CLKSYN Pin (open) Low Level Output Voltage

IOL = +1.0 mA (13)

VOSC_OL

––

0.4

CLKSYN Pin (open) High Level Output Voltage

IOH = -1.0 mA (14)

VOSC_OH

VDDI

-0.4 V

–

CLKSYN Pin (grounded) Input Voltage Threshold

VOSC_IH

1.2

–

2.0

CLKSYN Pin Pullup Resistance

RPU

–

240

Ω

Frequency Adjusting Reference Voltage

VFREQ

–1.26–

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

Power MOSFET Q5 RDS(ON)(11)

IBD = 500 mA, TA = 25°C

RDS(ON)

–

650

1000

Ω

Regulator Recommended Output Capacitor

CBST

–

µF

Regulator Recommended Output Capacitor Maximum ESR

ESRCBST

–

100

–

Ω

Notes

11.

Design information only. This parameter is not production tested.

12.

IOEA Refers to Error Amplifier Output Current.

13.

IOL Refers to IO Low Level Threshold Voltage Current

14.

IOH Refers to IO High Level Threshold Voltage Current

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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