MAX1586C データシートの表示（PDF） - Maxim Integrated

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MAX1586C

High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smart Phones

Maxim Integrated 

High-Efficiency, Low-IQ PMICs with

Dynamic Core for PDAs and Smart Phones

ELECTRICAL CHARACTERISTICS (continued)

Note 1: Dropout voltage is guaranteed by the p-channel switch resistance and assumes a maximum inductor resistance of 45mΩ.

Note 2: The PWM-skip-mode transition has approximately 10mA of hysteresis.

Note 3: The maximum output current is guaranteed by the following equation:

IOUT(MAX)

=

ILIM −

VOUT

2x

(1 − D)

f xL

1+

(RN

+

RL)

(1 −

2xf

D)

xL

where:

D = VOUT + IOUT(MAX) (RN + RL)

VIN + IOUT(MAX) (RN − RP)

and RN = n-channel synchronous rectifier RDS(ON)

RP = p-channel power switch RDS(ON)

RL = external inductor ESR

IOUT(MAX) = maximum required load current

f = operating frequency minimum

L = external inductor value

ILIM can be substituted for IOUT(MAX) (desired) when solving for D. This assumes that the inductor ripple current is

small relative to the absolute value.

Note 4: POK only indicates the status of supplies that are enabled (except V7). When a supply is turned off, POK does not trigger

low. When a supply is turned on, POK immediately goes low until that supply reaches regulation. POK is forced low when all

supplies (except V7) are disabled.

Note 5: Specifications to -40°C are guaranteed by design, not production tested.

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