AS3661 datasheet(13/87 Pages) AMSCO

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AS3661

Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s

7 Typical Operating Characteristics

VBAT = 3.6V, VEN = 1.65V, CBAT = CVCPOUT = 1.0µF, CFLY1-2 = 0.47µF, TAMB = +25ºC, unless otherwise specified

Figure 4. Charge Pump 1.5 x Efficiency vs. Load

Figure 5. Output Voltage vs. Load Current (1.5 x CP)

100

Iload [mA]

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

3,2

3,4

3,6

3,8

4,2

4,4

105

120

Iload [mA]

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

Figure 6. Gain Change Hysteresis Loop (6x1mA load)

Figure 7. Effect of adap. hyst. on width of hyst. loop

2,5

2,7

2,9

3,1

3,3

3,5

3,7

3,9

4,1

4,3

4,5

2,6

2,8

3,2

3,4

3,6

3,8

Vbat [V]

Vbat increasing

Vbat decreasing

6 x LED Multicomp OVS-0601

0,1

0,2

0,3

0,4

0,5

0,6

100

Iload [mA]

400mV Adaptive Hysterese

200mV Adaptive Hysterese

200mV Hysterese

400mV Hysterese

6 x LED Multicomp OVS-0601

Figure 8. LED Current matching distribution @17.5mA

Figure 9. LED current Accuracy distribution @17.5mA

−1

Total count: 610 parts

−2

Total count: 610 parts

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