LM3243

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SNVS782B – OCTOBER 2010 – REVISED FEBRUARY 2013

SYSTEM CHARACTERISTICS

The following spec table entries are specified by design and verifications providing the component values in the Typical

Application Circuit are used (L = 1.5 µH, DCR = 120 m

CL05A475MQNRN; 6.3V, 0201 Samsung CL03A105MQ3CSN; 6.3V, 01005 Murata GRM022R60J332K). These parameters

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Time for SW pin to become

EN = LOW-to-HIGH

30

active upon power-up

Turn-on time (time for output

µs

to reach 90% of final value

50

after EN LOW-to-HIGH

1mA

transition)

to 3V (90% or 2.7V)

VCON = 0V to 1.2V

20

3.6V to 2.6V (10% or 2.7V)

VCON = 1.44V to 1.04V

1.8V to 2.8V (90% or 2.7V)

VCON = 0.72V to 1.12V

µs

15

2.8V to 1.8V (10% or 1.9V)

1.12V to 0.72V

to 3.4V (90% or 3.1V)

VCON = 0V to 1.36V

20

3.4V to 0.4V (10% or 0.7V)

1.36V to 0.16V

to PVIN after BP LOW-to-

20

HIGH transition (90%)

µs

Bypass turn-on time. Time for

50

after EN LOW-to-HIGH

transition (90% or 3.24)

Total dropout resistance in

3.1V,

45

55

m

Ω

bypass mode

Inductor ESR

≤ 151 mΩ

Pin input capacitance for BP,

Test frequency = 100 KHz

5

pF

EN, MODE

Maximum load current in

Switcher + ACB

2.5

PWM mode

Maximum output transient

3.0

A

pullup current limit

PWM maximum output

−3.0

transient pulldown current limit

Maximum output load current

85

mA

in PFM mode

−3

+3

%

Linearity in control range of

(2)

Linearity

VCON = 0.16V to 1.44V

Monotonic in nature

−50

+50

mV

(1)

Current limit is built-in, fixed, and not adjustable.

(2)

Linearity limits are ±3% or ±50 mV, whichever is larger.

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