MAX77650CEWVT datasheet(21/82 Pages) MAXIM

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(VSYS = 3.7V, VIN_LDO = 2.05V, VLDO = 1.85V, CLDO = 10μF, limits are 100% production tested at TA = +25°C, limits over the operating

temperature range (TA = -40°C to +85°C) are guaranteed by design and characterization, unless otherwise noted.)

Note 5: Dropout is the condition where the input voltage is in its valid input range but the output cannot be properly regulated

because the input voltage is not sufficiently higher than the output voltage. The dropout voltage is the difference between

the input voltage and the output voltage when the regulator is in dropout. The dropout on-resistance is the resistance of the

power MOSFET between the input and the output when the regulator is in dropout. Generally speaking, applications should

avoid dropout by having sufficient input voltage. A dropout detection interrupt is available (DOD_R; see the Programmer’s

Guide for more information). For example, applications with the output voltage target of 1.85V and the maximum load cur-

rent is 80mA (ILDO_MAX), has a dropout voltage of 96mV (VLDO_DO = ILDO_MAX x RDSON_LDO = 80mA x 1.2Ω =

96mV). To avoid dropout, the input voltage should be 1.95V (VIN_LDO = VLDO + VLDO_DO).

Note 6: Guaranteed by design and characterization but not directly production tested. Production test coverage is provided by the

shutdown supply current and quiescent supply current specification in the Electrical Characteristics—Top Level table.

Note 7: Guaranteed by design and characterization but not directly production tested. The ability to disconnect the active discharge

resistance is functionally checked in a production test.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TIMING CHARACTERISTICS

Enable Delay

TA = +25°C

0.6

1.25

Soft-Start Slew Rate

dV/dtSS

VLDO from 10% to 90% of final value.

TA = +25°C

0.5

1.25

2.50

mV/μs

POWER STAGE CHARACTERISTICS

Dropout Voltage

VLDO_DO

VSYS = 3.7V, 1.85V programmed output

voltage (TV_LDO[6:0] = 0x20), VIN_LDO =

1.8V, ILDO = 150mA (Note 5)

180

Active-Discharge

Impedance

RAD_LDO

Regulator disabled, active discharge

enabled (ADE_LDO = 1)

100

200

Disabled Output

Leakage Current

Regulator disabled,

active discharge

disabled (ADE_

LDO = 0), VSYS =

VIN_LDO = 5.5V,

VLDO = 5.5V and

TA = +25°C (Note 7)

+0.1

+1.0

μA

TA = +85°C

+1.0

Dropout On-Resistance

RDSON

VSYS = 3.7V,

1.85V programmed

output voltage

(TV_LDO[6:0] =

0x20), VIN_LDO =

1.8V, ILDO = IMAX,

(Note 5)

TA = +25°C

0.6

0.9

TA = +85°C

1.2

Electrical Characteristics—LDO (continued)

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Ultra-Low Power PMIC with 3-Output SIMO

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