LM3280TLSLASHNOPB datasheet(10/27 Pages) TI

10 / 27 page

-40

AMBIENT TEMPERATURE (oC)

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

-20

100

VIN = 4.2V

VCON = 0.5V

IOUT = 200 mA

VIN = 2.7V

VIN = 3.6V

-40

-20

100

AMBIENT TEMPERATURE (

oC)

100

110

120

IBYPOUT = 500 mA

VIN = 2.7V

VIN = 3.6V

VIN = 4.2V

400 ns/DIV

200 mA/DIV

2V/DIV

VSW

VIN = 3.6V

VOUT = 1.5V

10 mV/DIV

AC Coupled

VOUT

IOUT = 200 mA

400 ns/DIV

200 mA/DIV

2V/DIV

VSW

VIN = 3.57V

VOUT = 3.25V

10 mV/DIV

AC Coupled

VOUT

IOUT = 200 mA

100 Ps/DIV

1.08V

0.5V

VSW

VOUT

VIN = 4.2V

RLOAD = 15:

3.25V

2V/DIV

VCON

1.5V

10 Ps/DIV

500 mA/DIV

2V/DIV

VSW

VOUT

VOUT = 1.5V

1V/DIV

RLOAD = 15:

LM3280

SNOSAU4B – OCTOBER 2006 – REVISED FEBRUARY 2013

www.ti.com

Typical Performance Characteristics (continued)

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

VCON Voltage Response

Timed Current Limit Response

(VIN = 4.2V, VCON = 0.5V / 1.1V)

(Normal Operation to Short Circuit)

Figure 21.

Figure 22.

Output Voltage Ripple

Output Voltage Ripple in Dropout

(VOUT = 1.5V)

(VIN = 3.75V, VOUT = 3.25V, IOUT = 200mA)

Figure 23.

Figure 24.

Switching Frequency Variation

RDSON

Temperature (VOUT = 1.5V)

Temperature (Bypass FET)

Figure 25.

Figure 26.

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