MAX8662(2007) 查看數據表（PDF） - Maxim Integrated

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MAX8662
(Rev.:2007)

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

Maxim Integrated 

Power-Management ICs for

Single-Cell, Li+ Battery-Operated Devices

ELECTRICAL CHARACTERISTICS (Output Regulator) (continued)

(VSYS_ = VPV_ = VIN45 = VIN67 = 4.0V, VBRT = 1.25V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

OVP Leakage Current

nMOS On-Resistance

nMOS Off-Leakage Current

nMOS Current Limit

VEN3 = 0V,

VOVP = VSYS = 5.5V

ILX3 = 100mA

VLX3 = 30V

TA = +25°C

TA = +85°C

TA = +25°C

TA = +85°C

0.01

1

µA

0.1

0.6 1.2

Ω

0.01 5.00

µA

0.1

500 620 900 mA

LED DRIVER

BRT Input Range

REF Voltage

BRT Input Current

CS Sink Current

VBRT

VREF

ICS = 0 to 30mA

IREF = 0mA

VBRT = 0 to 1.5V

VCS = 0.2V

TA = +25°C

TA = +85°C

VBRT = 1.5V

VBRT = 50mV

0

1.5

V

1.45 1.50 1.55

V

-1 -0.01 +1

µA

0.1

28

30

32

mA

0.4 0.8 1.2

CS Current-Source

Line Regulation

VSYS = 2.7V to 5.5V

0.1

%/V

PWM DIMMING

EN3 DC Turn-On Delay

EN3 Shutdown Delay

PWM Dimming Capture

Period

From VEN3 = high to LED on

From VEN3 = low to LED off

Time between rising edges

on EN3 for PWM dimming to

become active

Maximum

Minimum

1.5 2.0 2.5

ms

1.5 2.0 2.5

ms

1.5 2.0

ms

8

10

µs

PWM Dimming Pulse-Width

Resolution

Resolution of high or low-pulse width on EN3 for

dimming change

0.5

µs

LINEAR REGULATORS

IN45, IN67 Operating Range

IN45, IN67 Undervoltage

Threshold

VIN45

VUVLO-IN45 VIN45 rising, 100mV hysteresis

1.7

5.5

V

1.5 1.6 1.7

V

Output Noise

PSRR

f = 100Hz to 100kHz

f = 100kHz

200

µVRMS

30

dB

Shutdown Supply Current

Soft-Start Ramp Time

Output Discharge

Resistance in Shutdown

VEN4 = VEN5 = 0V, TA = +25°C

VOUT4 to 90% of final value

VEN4 = 0V

0.001 1

10

0.5 1.0 2.0

µA

V/ms

kΩ

LINEAR REGULATOR 4 (LDO4)

Supply Current

Voltage Accuracy

Minimum Output Capacitor

Dropout Resistance

COUT4

At IN45, VEN5 = 0V

IOUT4 = 0A

IOUT4 = 0 to 500mA,

VIN45 = VOUT4 + 0.3V to 5.5V with 1.7V (min)

Guaranteed stability, ESR < 0.05Ω

IN45 to OUT4

20

30

µA

-1.5

+1.5

%

3.76

µF

0.2 0.4

Ω

Current Limit

VOUT4 = 0V

500 700

mA

6 _______________________________________________________________________________________

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