LM3280TLSLASHNOPB datasheet(7/27 Pages) TI

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LDO

20 Ps/DIV

500 mV/DIV

5V/DIV

ENLDO

VIN = 3.0V

COUT = 1 éF

RLOAD = 270:

LDO

20 Ps/DIV

500 mV/DIV

5V/DIV

ENBUCK &

ENLDO

500 mV/DIV

VOUT

VIN = 3.0V

COUT = 1 éF

RLOAD = 270:

0.0

0.2

JUNCTION TEMPERATURE (°C)

-40 -20

80 100 120 140

0.1

0.3

VIN = 2.7V

VIN = 4.2V

VIN = 5.5V

VIN = 3.6V

0.4

0.5

0.6

0.7

0.8

0.9

1.0

20 Ps/DIV

10 mV/DIV

AC Coupled

3.0 V

VIN

LDO

3.6 V

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

SUPPLY VOLTAGE (V)

0.60

0.64

0.68

0.72

0.80

0.84

0.76

TA = 25

TA = -30

TA = 85

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

SUPPLY VOLTAGE (V)

0.76

0.80

0.84

0.88

0.96

1.00

0.92

TA = 25

TA = 85

TA = -30

LM3280

www.ti.com

SNOSAU4B – OCTOBER 2006 – REVISED FEBRUARY 2013

Typical Performance Characteristics

(VIN = ENBUCK = 3.6V, ENLDOx = BYP = 0V, TA = 25°C, unless otherwise noted)

Quiescent Current vs

Supply Voltage

(VCON = 0.267V, FB = 2V, No Switching, LDO Disabled)

(VCON = 0.267V, FB = 2V, No Switching, LDO Enabled)

Figure 3.

Figure 4.

Shutdown Current vs

Temperature

LDO Line Transient Response

(all EN = BYPOUT = VCON = SW = FB = 0V)

(RLOAD = 270Ω, COUT = 1µF)

Figure 5.

Figure 6.

LDO Turn ON

(ENLDO = Low to High)

(ENBUCK = ENLDO = Low to High)

Figure 7.

Figure 8.

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