CS5111 datasheet(5/16 Pages) ONSEMI

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CS5111

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PIN FUNCTION DESCRIPTION (continued)

PACKAGE PIN #

FUNCTION

PIN SYMBOL

SO–24L

FUNCTION

PIN SYMBOL

IBIAS

A resistor connected to GND sets internal bias currents as well as the COSC and

CDelay charge currents.

VLIN

Regulated 5.0 V output from the linear regulator section.

VREG

Input voltage to the linear regulator and the internal supply circuitry.

ENABLE

Logic level input to shut down the switching regulator.

TYPICAL PERFORMANCE CHARACTERISTICS

100

ILIN (mA)

3.5

4.5

4.0

0.5

1.0

2.0

ISW (A)

–40

–20

1.5

–10

–30

0.5

1.0

2.0

ISW (A)

1.4

1.0

1.5

1.2

0.8

0.6

0.4

0.2

500

1000

3000

COSC (pF)

180

1500

160

140

120

100

2000

2500

Figure 2. 5.0 V Regulator Bias Current vs. Load Current

Figure 3. Supply Current vs. Switch Current

Figure 4. Switch Saturation Voltage

Figure 5. Oscillator Frequency (kHz) vs.

COSC (pF), Assuming RBIAS = 64.9 kW

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