MAX8662 Просмотр технического описания (PDF) - Maxim Integrated

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MAX8662

Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices

Maxim Integrated 

Power-Management ICs for

Single-Cell, Li+ Battery-Operated Devices

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 =

VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT =

0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C,

unless otherwise noted.)

VOUT1

AC-COUPLED

OUT1 REGULATOR LIGHT-LOAD

SWITCHING WAVEFORMS

MAX8662/63 toc25

VBAT = 4.0V

IOUT1 = 10mA

50mV/div

VOUT1

AC-COUPLED

OUT1 REGULATOR HEAVY-LOAD

SWITCHING WAVEFORMS

MAX8662/63 toc26

10mV/div

VLX

2V/div

VLX

2V/div

IL

VLX

IOUT1

IL

VOUT1

20µs/div

200mA/div

PWM = 0

OUT1 REGULATOR LOAD-

TRANSIENT RESPONSE

MAX8662/63 toc27

5V/div

1A/div

1A/div

VBAT = 4.0V

IOUT1 = 10mA TO 1200mA TO 10mA

PWM = 0

100mV/div

IL

VBAT = 4.2V

IOUT1 = 1200mA

1µs/div

500mA/div

VSYS

VOUT1

OUT1 REGULATOR LINE-

TRANSIENT RESPONSE

MAX8662/63 toc28

5V

4V IOUT1 = 10mA

PWM = 0

1V/div

50mV/div

5V/div

VLX

IL

200mA/div

40µs/div

100µs/div

OUT1 ENABLE AND DISABLE RESPONSE

MAX8662 toc29

VCEN = VL

ROUT1 = 33I

VOUT1

IDC

2V/div

200mA /div

VEN1

2V/div

400µs/div

100

90

80

70

60

50

40

30

20

10

0

0.1

OUT2 REGULATOR EFFICIENCY

vs. LOAD CURRENT

VBAT = 4.2V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 3.6V

PWM = 0

PWM = 1

VOUT1 = 3.3V

1

10

100

1000

LOAD CURRENT (mA)

OUT2 REGULATOR LOAD REGULATION

1.32

VBAT = 4.2V

1.31

1.30

1.29

VBAT = 3.6V

1.28

1.27

1.26

0.1

1

10 100 1000 10,000

LOAD CURRENT (mA)

______________________________________________________________________________________ 11

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