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MAX8661ETL

High-Efficiency, Low-IQ, PMICs with Dynamic Voltage Management for Mobile Applications

Maxim Integrated 

High-Efficiency, Low-IQ, PMICs with Dynamic

Voltage Management for Mobile Applications

Typical Operating Characteristics (continued)

(Circuit of Figure 3, VIN = 3.6V, TA = +25°C, unless otherwise noted.)

REG1 EFFICIENCY vs. LOAD CURRENT

100

FORCED-PWM

95

NORMAL

90

85

80

75

VIN = 4.2V

70

65

60

55

50

0.01

VIN = 3.6V

V1 = 3.3V

L1 = 1.2µH

(TOKO DE2812C)

0.1 1 10 100 1000 10,000

LOAD CURRENT (mA)

REG1 OUTPUT VOLTAGE vs. INPUT VOLTAGE

3.6

DROPOUT

ILOAD = 10mA

3.4

VIN

3.2

3.0

ILOAD = 1000mA

2.8

2.6

V1

2.4

3.3V OUTPUT

2.2

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

INPUT VOLTAGE (V)

REG1 LINE TRANSIENT

MAX8660 toc08

5.0V

1V/div

3.6V

100mV/div

600mA LOAD,

V1 = 3.3V

40µs/div

3.40

3.38

3.36

3.34

3.32

3.30

3.28

3.26

3.24

3.22

3.20

0

REG1 LOAD REGULATION

VIN = 3.8V

-1.5%/A

FORCED-PWM

NORMAL

200 400 600 800 1000 1200

LOAD CURRENT (mA)

REG1 OUTPUT VOLTAGE vs. TEMPERATURE

3.40

3.38

3.36

3.34

3.32

3.30

3.28

3.26

3.24

3.22

600mA LOAD

3.20

-40 -15

10

35

60

85

TEMPERATURE (°C)

REG1 DROPOUT VOLTAGE vs. LOAD CURRENT

300 THE NOMINAL ESR OF TOKO'S 1.2µH

DE2812C INDUCTOR IS 44mΩ. THE NOMINAL

250 p-CHANNEL RESISTANCE OF THE REG1 IS

120mΩ. THE SLOPE OF THIS LINE SHOWS THAT

THE TOTAL REG1 DROPOUT RESISTANCE OF AN

200 AVERAGE PART, BOARD, INDUCTOR

COMBINATION IS 172mΩ.

150

100

50

0

0 200 400 600 800 1000 1200

LOAD CURRENT (mA)

REG1 LOAD TRANSIENT

MAX8660 toc12

REG 1 HEAVY-LOAD SWITCHING WAVEFORMS

MAX8660 toc13

REG1 LIGHT-LOAD SWITCHING WAVEFORMS

MAX8660 toc14

V1 = 3.3V

3.8V INPUT

V1

100mV/div

VLX1

2V/div VLX1

2V/div

IV1

10mA

800mA

40µs/div

V1

500mA/div

IL1

2mV/div

V1

1A/div IL1

4.2V INPUT 0A

1A LOAD

400ns/div

3.8V INPUT, 20mA LOAD

2µs/div

20mV/div

200mA/div

0A

12

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