PIFE32251B-R47MS datasheet(14/96 Pages) TI1

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TPS65094

SWCS133C – SEPTEMBER 2015 – REVISED FEBRUARY 2019

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Specifications

(1)

Frequency of transient load current ranges from 0 to 1 MHz with duty cycle of 50%. For cases where duty cycle and frequency are

limited by tr and tf, the highest frequency is set by 1 / (tr + tf), where tr is rise time (0% to 100%) and tf is fall time (100% to 0%).

5.7

Electrical Characteristics: Buck Controllers

over recommended input voltage range, TA = –40°C to +85°C and TA = 25°C for typical values (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

BUCK1

VIN

Power input voltage for

external HSD FET

5.6

VOUT

DC output voltage

Step size

BUCK1_VID[6:0] = 0000000

BUCK1_VID[6:0] = 0000001

0.5

BUCK1_VID[6:0] = 0000010

0.51

⋮

BUCK1_VID[6:0] = 0110011 (default)

1.00

⋮

BUCK1_VID[6:0] = 1110101

1.66

BUCK1_VID[6:0] = 1110110–1111111

1.67

DC output voltage

accuracy

VOUT ≥ 1 V, IOUT = 100 mA to 5 A

–2%

VOUT = 0.75 V, IOUT = 100 mA to 2.1 A

–2.5%

2.5%

VOUT ≤ 0.6 V, IOUT = 10 mA

–3.5%

3.5%

Total output voltage

accuracy (DC + ripple) in

DCM

IOUT = 10 mA, VOUT ≤ 0.785 V, VSYS = 13 V

–20

IOUT = 10 mA, VOUT ≤ 0.785 V, VSYS = 21 V

–20

SR(VOUT)

Output DVS slew rate

2.5

3.125

mV/µs

ILIM_LSD

Low-side output valley

current limit accuracy

(programmed by external

resistor RLIM)

See Section 6.3.3.4, Current Limit, for details.

–15%

15%

VTH_ZC

Low-side current zero

crossing detection

threshold

–11

ILIMREF

Source current out of

ILIM1 pin

T = 25°C

µA

VLIM

Voltage at ILIM1 pin

VLIM = RLIM × ILIMREF

0.2

2.25

ΔVOUT/ΔVIN

Line regulation

VOUT ≥ 1 V, IOUT = 5 A

–0.5%

0.5%

ΔVOUT/ΔIOUT

Load regulation

VIN = 13 V, VOUT ≥ 1 V,

IOUT = 0 A to 5 A,

referenced to VOUT at IOUT = 5 A

ΔVOUT_TR

(1)

Load transient regulation

DC + AC at sense point, VIN = 13 V,

VOUT = 1.00 V,

IOUT = 1.5 A to 5 A and 5 A to 1.5 A with 1 µs of

tr and tf

–50

DC + AC at sense point, VIN = 13 V,

VOUT = 0.75 V,

IOUT = 0.3 A to 1.5 A and 1.5 A to 0.3 A with 1 µs

of tr and tf

VTH_PG

Power Good deassertion

threshold in percentage

of target VOUT

VOUT rising

108%

VOUT falling

92%

VTH_HYS_PG

Power Good reassertion

hysteresis entering back

into VTH_PG

VOUT rising or falling

COUT

External output

capacitance

Recommended amount to meet transient

specification

180

220

µF

LSW

External output

inductance

0.376

0.47

0.564

µH

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