TPS82740ASIPT datasheet(6/28 Pages) TI1

6 / 28 page

TPS82740A, TPS82740B

SLVSCE3A – JUNE 2014 – REVISED JUNE 2014

www.ti.com

Electrical Characteristics (continued)

VIN = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

AUTO 100% MODE TRANSITION

Auto 100% Mode

170

250

340

Rising VIN,100% Mode is left with VIN = VOUT + VTH_100+ , max value

VTH_100+

exit detection

at TJ = 85°C

threshold (1)

Auto 100% Mode

110

200

280

Falling VIN, 100% Mode is entered with VIN = VOUT + VTH_100-, max

VTH_100-

enter detection

value at TJ = 85°C

threshold (1)

OUTPUT

tStartup_delay

Regulator start up

From transition EN = low to high until device starts switching

delay time

tSoftstart

Softstart time with

2.2V

≤ VIN ≤ 5.5V, EN = VIN

400

1200

µs

reduced switch

current limit

High side MOSFET

150

200

switch current limit

ILIM_softstart

Reduced switch current limit during softstart

Low side MOSFET

150

switch current limit

Output voltage

Output voltages are selected with pins VSEL1,

TPS82740A

1.8

2.5

range

VSEL2, VSEL3

TPS82740B

2.6

3.3

IOUT = 10mA, VOUT = 1.8V / 2.6V

-2.5

2.5

Output voltage

accuracy

IOUT = 100mA, VOUT = 1.8V / 2.6V

–2

VVOUT

DC output voltage

VOUT = 1.8V / 2.6V, CTRL = VIN

0.001

%/mA

load regulation

DC output voltage

VOUT = 1.8V / 2.6V, CTRL = VIN, IOUT = 10 mA, 2.5V ≤ VIN ≤ 5.5V

%/V

line regulation

(1)

VIN is compared to the programmed output voltage (VOUT). When VIN–VOUT falls below VTH_100- , the device enters 100% Mode by

turning the high side MOSFET on. 100% Mode is exited when VIN–VOUT exceeds VTH_100+ and the device starts switching. The

hysteresis for the 100% Mode detection threshold VTH_100+ - VTH_100- is always positive and 50 mV(typ.)

8.6 Typical Characteristics

TABLE OF GRAPHS

FIGURE

Figure 3, Figure 4, Figure 5,

Efficiency

vs Output Current

Figure 6

Figure 7, Figure 8, Figure 9,

Efficiency

vs Input Voltage

Figure 10

Figure 11, Figure 12, Figure 13,

VOUT

Output voltage

vs Output curent

Figure 14

Operating quiescent current

vs Input voltage

Figure 1

ISD

Shutdown current

vs Input voltage

Figure 2

Automatic Transition into 100% Mode

Figure 18, Figure 19, Figure 20

FSW

Switching frequency

vs Output current

Figure 15, Figure 16, Figure 17

Figure 21, Figure 22, Figure 23,

Figure 24, Figure 25, Figure 26,

Line and Load Transient Performance

Figure 27, Figure 28, Figure 29,

Figure 30

AC load regulation performance

Figure 31, Figure 32

LOAD

LOAD Output Behavior

Figure 33, Figure 34, Figure 35

Figure 36, Figure 37, Figure 38,

Input Voltage Ramp up / down

Figure 39

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