LP5520 datasheet(6/46 Pages) TI1

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LP5520

SNVS440B – MAY 2007 – REVISED MARCH 2016

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6.7 Logic Interface Characteristics

Typical limits are for TJ = 25°C, minimum and maximum limits apply over the operating ambient temperature range

(–30°C < TJ < +85°C); over operating free-air temperature range (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LOGIC INPUTS SS, SI/A0, SCK/SCL, IFSEL, NRST, PWMR, PWMG, PWMB and BRC

VIL

Input low level

0.2 × VDDIO

VIH

Input high level

0.8 × VDDIO

Logic input current

−1

µA

ƒSCK/SLC

Clock frequency

I2C mode

0.4

MHz

SPI mode, VDDIO > 1.8 V

SPI mode, 1.65 V < VDDIO <

1.8 V

LOGIC INPUT NRST

VIL

Input low level

VIH

Input high level

1.2

Logic input current

–1

µA

tNRST

Reset pulse width

µs

LOGIC OUTPUT SO

VOL

Output low level

ISO = 3 mA

VDDIO > 1.8 V

0.3

0.5

ISO = 2 mA

1.65 V < VDDIO < 1.8 V

0.3

0.5

VOH

Output high level

ISO = –3 mA

VDDIO > 1.8 V

VDDIO − 0.5

VDDIO − 0.3

ISO = –2 mA

1.65 V < VDDIO < 1.8 V

VDDIO − 0.5

VDDIO − 0.3

Output leakage current

VSO = 2.8 V

µA

LOGIC OUTPUT SDA

VOL

Output low level

ISDA = 3 mA

0.3

0.5

6.8 Magnetic Boost DC-DC Converter Electrical Characteristics

Typical limits are for TJ = 25°C, minimum and maximum limits apply over the operating ambient temperature range

(–30°C < TJ < +85°C); over operating free-air temperature range (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ILOAD

Maximum continuous load

current

2.9V = VIN, VOUT = 20 V

TJ = 25°C

VOUT

Output voltage accuracy (FB pin)

2.9

≤ VIN ≤ 5.5 V, VOUT = 20 V

TJ = 25°C

–1.7%

1.7%

2.9

≤ VIN ≤ 5.5 V, VOUT = 20 V

–5%

RDSON

Switch ON resistance

ISW = 0.5 A

0.3

Ω

ƒPWM

Frequency accuracy

TJ = 25°C

−6%

±3%

–9%

tPULSE

Switch pulse minimum width

no load

tSTARTUP

Start-up time

IMAX

SW pin current limit

1100

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