LM2724A

SNVS242C – JUNE 2003 – REVISED MARCH 2013

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Electrical Characteristics — LM2724A

VCC = BOOT = SYNC = 5V, SW = GND = 0V, unless otherwise specified. Tyicals and limits appearing in plain type apply for

TA = TJ = +25°C. Limits appearing in boldface type apply over the entire operating temperature range.

Symbol

Parameter

Condition

Min

Typ

Max

Units

POWER SUPPLY

Iq_op

Operating Quiescent Current

IN = 0V

145

195

µA

TOP DRIVER

Peak Pull-Up Current

3.0

A

Pull-Up Rds_on

IBOOT = IHG = 0.3A

1.2

Ω

Peak Pull-down Current

−3.2

A

Pull-down Rds_on

ISW = IHG = 0.3A

0.5

Ω

t4

Rise Time

Timing Diagram, CLOAD = 3.3nF

17

ns

t6

Fall Time

12

ns

t3

Pull-Up Dead Time

Timing Diagram

19

ns

t5

Pull-Down Delay

Timing Diagram, from IN Falling Edge

27

ns

BOTTOM DRIVER

Peak Pull-Up Current

3.2

A

Pull-up Rds_on

IVCC = ILG = 0.3A

1.1

Ω

Peak Pull-down Current

3.2

A

Pull-down Rds_on

IGND = ILG = 0.3A

0.6

Ω

t8

Rise Time

Timing Diagram, CLOAD = 3.3nF

17

ns

t2

Fall Time

14

ns

t7

Pull-up Dead Time

Timing Diagram

22

ns

t1

Pull-down Delay

Timing Diagram

13

ns

LOGIC

Vuvlo_up

VCC Under-Voltage-Lock-Out Upper Threshold

VCC rises from 0V toward 5V

4

V

Vuvlo_dn

VCC Under-Voltage-Lock-Out Lower Threshold

VCC falls from 5V toward 0V

2.5

V

Vuvlo_hys

VCC Under-Voltage-Lock-Out Hysteresis

VCC falls from 5V toward 0V

0.8

V

VIH_SYNC

SYNC Pin High Input

55%

VCC

VIL_SYNC

SYNC Pin Low Input

25%

Ileak_SYNC SYNC Pin Leakage Current

SYNC = 5V, Sink Current

2

µA

SYNC = 0V, Source Current

10

Ileak_IN

IN = 0V, Source Current

2

IN Pin Leakage Current

µA

IN = 5V, Sink Current

10

ton_min1

Minimum Positive Pulse Width at IN Pin(1)

160

ton_min2

Minimum Positive Pulse Width at IN Pin for HG to

45

Respond(2)

ton_min3

Minimum Positive Pulse Width at IN Pin for LG to

10

Respond(3)

ns

toff_min1

Minimum Negative Pulse Width at IN Pin for LG

40

to Respond(4)

toff_min2

Minimum Negative Pulse Width at IN Pin for HG

5

to Respond(5)

VIH_IN

IN High Level Input Voltage

When IN pin goes high from 0V

55%

VCC

VIL_IN

IN Low Level Input Voltage

When IN pin goes low from 5V

25%

(1)

If the positive pulse width at IN pin is below this value but above ton_min2, the pulse is internally stretched to ton_min1, so the HG width will

be a constant value.

(2)

If the positive pulse width at IN pin is below this value but above ton_min3, then HG stops responding while LG still responds to the pulse.

(3)

If the positive pulse width at IN pin is below this value, the pulse will be completely ignored. Neither HG or LG will respond to it.

(4)

If the negative pulse width at IN pin is below this value but above toff_min2, then LG stops responding while HG still responds.

(5)

If the negative pulse width at IN pin is below this value, the pulse will be completely ignored. Neither HG or LG will respond to it.

4

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