MAX8939EWVT datasheet(5/43 Pages) MAXIM

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_______________________________________________________________________________________ 5

System Power Management

for Mobile Handset

ELECTRICAL CHARACTERISTICS (continued)

(VBATT = 3.7V, VCHG_IN = 5.0V, circuit of Figure 1, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

THERMAL LOOP

Thermal Limit Temperature

Junction temperature when the charge current is

reduced, TJ rising, default value

+100

OUT1 STEP-UP DC-DC CONVERTER

Input Voltage (VBATT)

2.9

5.5

Input Supply Current

2MHz switching, VOUT = 5V, no load

OUT1 Voltage Accuracy

500mA load, default value, TA = +85NC

4.8

5.0

5.2

Maximum Output Current

VBATT R 3.2V, VOUT1 = 5.0V

550

700

nFET Current Limit

2.0

Line Regulation

VBATT = 2.9V to 4.2V

0.1

%/V

Load Regulation

0 to 500mA load

0.5

%/A

LX1 nFET On-Resistance

LX1 to PGND1, ILX1 = 200mA

0.1

0.2

LX1 pFET On-Resistance

LX1 to OUT1, ILX1 = -200mA

0.15

0.3

LX1 Leakage

VLX1 = 5.5V

TA = +25NC

0.1

TA = +85NC

Switching Frequency

1.8

2.2

MHz

Maximum Duty Cycle

Minimum Duty Cycle

COMP Discharge Resistance

During shutdown or UVLO

220

VIBRATOR

Programmable Output Voltage

OUTVIB

1mA at VBATT = VINVIB = 5.5V, 150mA at VBATT =

VINVIB = 3.4V, default value

Output Current

200

Current Limit

VOUTVIB = 0V

400

600

Dropout Voltage

ILOAD = 135mA, TA = +25NC

150

300

Line Regulation

3.4V P VBATT = VINVIB < 5.5V, ILOAD = 100mA

2.2

Load Regulation

1mA < ILOAD < 200mA

Power-Supply Rejection

VINVIB/DVOUTVIB

f = 10Hz to 10kHz, ILOAD = 30mA

Output Noise

100Hz to 100kHz, ILOAD = 30mA

VRMS

Discharge Time Constant

TOFF 90% to 5%, C = 1FF

0.1

Active Stop

nFET on-resistance

Active Brake on Shutdown

nFET on duration

LDO1

Output Voltage Accuracy

ILOAD = 1mA default 2.9V setting

2.813

2.9

2.987

Maximum Output Current

400

Current Limit

VLDO1 = 0V

600

Dropout Voltage

ILOAD = 200mA

200

400

Line Regulation

3.4V P VBATT P 5.5V, ILOAD = 100mA

2.4

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