MAX8621YETG datasheet(3/18 Pages) MAXIM

Part #	MAX8621YETG

Description	Dual Step-Down DC-DC Power-Management ICs for Portable Devices

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Manufacturer	MAXIM [Maxim Integrated Products]

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3 / 18 page

Dual Step-Down DC-DC Power-Management ICs

for Portable Devices

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 3.7V, CIN1 = 10µF, CIN2 = CIN3 = 4.7µF, COUT1 = COUT2 = 4.7µF, COUT3 = COUT4 = 2.2µF, CREFBP = 0.01µF, TA = -40°C to

+85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Tristate High Input Threshold

Hysteresis

SEL_

50

mV

PWRON,

EN2 Pulldown Resistor

to GND

400

800

1600

k

Ω

STEP-DOWN DC-DC CONVERTER 1 (BUCK1)

Supply Current

ILOAD = 0A, no switching

40

µA

Output Voltage Range

0.6

3.3

V

FB1 Threshold Voltage

VFB1 falling

0.603

V

FB1 Threshold Line Regulation

2.6V

≤ VIN ≤ 5.5V

0.3

%/V

FB1 Threshold Voltage Hysteresis

(% of VFB1)

1%

Shutdown

0.01

FB1 Bias Current

VFB1 = 0.5V

0.01

µA

p-MOSFET switch (ILIMP)

670

1000

1500

Current Limit

n-MOSFET rectifier (ILIMN)

750

1000

1330

mA

p-MOSFET switch, ILX1 = -40mA

0.65

1.5

On-Resistance

n-MOSFET rectifier, ILX1 = 40mA

0.35

0.8

Ω

Rectifier Off-Current Threshold

ILXOFF

45

70

mA

tON

107

Minimum On- and Off-Times

tOFF

95

ns

STEP-DOWN DC-DC CONVERTER 2 (BUCK2)

Supply Current

ILOAD = 0A, no switching

40

µA

Output Voltage Range

0.6

3.3

V

FB2 Threshold Voltage

VFB2 falling

0.603

V

FB2 Threshold Line Regulation

2.6V

≤ VIN ≤ 5.5V

0.3

%/V

FB2 Threshold Voltage Accuracy

(Falling) (% of VFB2)

ILOAD = 0A

-2.5

+2.5

%

FB2 Threshold Voltage Hysteresis

(% of VFB2)

1%

Shutdown

0.01

FB2 Bias Current

VFB = 0.5V

0.01

µA

p-MOSFET switch

670

1000

1500

Current Limit

n-MOSFET rectifier

750

1000

1330

mA

p-MOSFET switch, ILX2 = -40mA

0.65

1.5

On-Resistance

n-MOSFET rectifier, ILX2 = 40mA

0.35

0.8

Ω

Rectifier Off-Current Threshold

ILXOFF

45

70

mA

tON

107

Minimum On- and Off-Times

tOFF

95

ns

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