Rainbow-electronics MAX1587A Bedienungsanleitung PDF herunterladen (Seite 6)

MAX1586A/MAX1586B/MAX1587A

High-Efficiency, Low-I

PMICs with

Dynamic Core for PDAs and Smart Phones

6 _______________________________________________________________________________________

PARAMETER CONDITIONS

MIN

MAX

UNITS

PV1, PV2, PV3, SLPIN, IN Supply

Voltage Range

PV1, PV2, PV3, IN, and SLPIN must connect together

externally

2.6 5.5

IN45, IN6 Supply Voltage Range

2.4 5.5

rising

2.25 2.55

IN Undervoltage-Lockout (UVLO)

Threshold

falling

2.200 2.525

SYNCHRONOUS-BUCK PWM REG1

FB1 = GND, 3.6V ≤ V

PV1

≤ 5.5V, load = 0 to 1300mA

3.25 3.35

REG1 Voltage Accuracy

FB1 = IN, 3.6V ≤ V

PV1

≤ 5.5V, load = 0 to 1300mA

2.955 3.045

FB1 Voltage Accuracy

FB1 used with external resistors, 3.6V ≤ V

PV1

≤ 5.5V,

load = 0 to 1300mA

1.231 1.269

FB1 Input Current FB1 used with external resistors

100

Load = 800mA (Note 1)

280

Dropout Voltage

Load = 1300mA (Note 1)

450

LX1

= -180mA

0.3

P-Channel On-Resistance

LX1

= -180mA, V

PV1

= 2.6V

0.35

Ω

LX1

= 180mA

0.225

N-Channel On-Resistance

LX1

= 180mA, V

PV1

= 2.6V

0.25

Ω

P-Channel Current-Limit Threshold

-1.55 -2.10

OUT1 Maximum Output Current 2.6V ≤ V

PV1

≤ 5.5V (Note 3)

1.30

LX1 Leakage Current V

PV1

= 5.5V, LX1 = GND or PV1, V

ON1

= 0V

-10 +10

µA

SYNCHRONOUS-BUCK PWM REG2

FB2 = GND, 3.6V ≤ V

PV2

≤ 5.5V, load = 0 to 900mA

2.463 2.537

MAX1586A, MAX1587A, FB2 = IN, 3.6V ≤ V

PV2

≤ 5.5V,

load = 0 to 900mA

1.773 1.827

REG2 Voltage Accuracy

MAX1586B, FB2 = IN, 3.6V ≤ V

PV2

≤ 5.5V,

load = 0 to 900mA

3.25 3.35

FB2 Voltage Accuracy

FB2 used with external resistors, 3.6V ≤ V

PV2

≤ 5.5V,

load = 0 to 900mA

1.231 1.269

FB2 Input Current FB2 used with external resistors, V

FB2

= 1.25V

100

Dropout Voltage Load = 900mA (Note 1)

380

LX2

= -180mA

0.375

P-Channel On-Resistance

LX2

= -180mA, V

PV2

= 2.6V

0.425

Ω

LX2

= -180mA

0.25

N-Channel On-Resistance

LX2

= -180mA, V

PV2

= 2.6V

0.275

Ω

P-Channel Current-Limit Threshold

-1.1 -1.50

OUT2 Maximum Output Current 2.6V ≤ V

PV2_

≤ 5.5V (Note 3)

0.9

LX2 Leakage Current V

PV2

= 5.5V, LX2 = GND or PV2, V

ON2

= 0V

-10 +10

µA

ELECTRICAL CHARACTERISTICS

= 3.6V, V

BKBT

= 3.0V, V

LBI

= 1.1V, V

DBI

= 1.35V, circuit of Figure 5, T

= -40°C to +85°C, unless otherwise noted.) (Note 5)

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