LM3248

www.ti.com

SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013

SYSTEM CHARACTERISTICS (BUCK)

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

10 µF + 4.7 µF (Murata GRM155R61A106A, GRM155R61A475MEAA) + 4 x 1.0 µF (Murata GRM033R60J105M). These

parameters are not verified by production testing.

Symbol

Parameter

Condition

Min

Typ

Max

Units

Time Delay required after

BOOST_GATE = HIGH (before

ENABLE = High

30

µs

VCON can change)

3.4V (90% or 3.06V)

VCON = 0V to 1.36V

15

0V (10% or 0.34V)

VCON = 1.36V to 0V

3.3V (90% or 3.05V)

VCON = 0.32V to 1.32V

10

0.8V (10% or 1.05V)

VCON = 1.32 to 0.32V

µs

3.4V (90% or 3.2V)

VCON = 0.56V to 1.36V

10

1.4V (10% or 1.6V)

VCON = 1.36V to 0.56V

VCON = 0.72V to 1.12V

2.8V (93% or 2.73V)

MODE = 2G

15

VCON = 1.12V to 0.72V

1.8V (7% or 1.87V)

MODE = 2G

Positive transient peak current

(2)

1.9

2.1

A

limit

3.7V), PWM mode, switcher plus ACB

2.0

current

Maximum load current in PWM

A

mode

2.3

PWM mode, switcher plus ACB current

2.5

switcher plus ACB current

Load current to enter into PFM

mode at high duty cycle (D > 0.85

35

mA

BOOST_GATE = LOW

AND Boost in Bypass)

Maximum load current to enter

D < 0.85 or SW_BOOST = switching

85

mA

into PFM mode

Maximum output transient pullup

3.0

current limit

A

PWM maximum output transient

−3.0

pulldown current limit

(3)

−3

+3

%

range

(1)

Parameter is specified by design, characterization testing, or statistical analysis. Typical numbers are not verified by production testing,

but do represent the most likely norm.

(2)

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

(3)

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

Copyright © 2013, Texas Instruments Incorporated

Submit Documentation Feedback

7

Product Folder Links: LM3248