TPS62420, TPS62421

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SLVS676C – JUNE 2006 – REVISED JUNE 2010

ELECTRICAL CHARACTERISTICS

25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

Input voltage range

2.5

6.0

V

19

29

mA

(Mode = 0) device not switching,

EN1 = 1 OR EN2 = 1

32

48

mA

(Mode = 0) device not switching,

Operating quiescent current

EN1 = 1 AND EN2 = 1

23

mA

(1)

3.6

mA

(1)

(2)

1.2

3

Shutdown current

mA

(3)

0.1

1

Falling

1.5

2.35

Undervoltage lockout threshold

V

Rising

2.4

ENABLE EN1, EN2

High-level input voltage, EN1, EN2

1.2

V

Low-level input voltage, EN1, EN2

0

0.4

V

Input bias current, EN1, EN2

EN1, EN2 = GND or VIN

0.05

1.0

mA

DEF_1 INPUT

DEF_1 high level input voltage

DEF_1 pin is a digital input at fixed output voltage

09

V

options (TPS62421)

DEF_1 low level input voltage

0

0.4

Input biasd current DEF_1

DEF_1 = GND or VIN

0.01

1.0

mA

MODE/DATA

High-level input voltage,

1.2

V

MODE/DATA

Low-level input voltage,

0

0.4

V

MODE/DATA

Input bias current, MODE/DATA

MODE/DATA = GND or VIN

0.01

1.0

mA

Acknowledge output voltage high

Open drain, via external pullup resistor

V

Acknowledge output voltage low

Open drain, sink current 500mA

0

0.4

V

INTERFACE TIMING

Start time

2

ms

High time low bit, logic 0 detection

Signal level on MODE/DATA pin is > 1.2V

2

200

ms

Low time low bit, logic 0 detection

Signal level on MODE/DATA pin < 0.4V

2x

400

ms

Low time high bit, logic 1 detection

Signal level on MODE/DATA pin < 0.4V

2

200

ms

High time high bit, logic 1 detection

Signal level on MODE/DATA pin is > 1.2V

2x

400

ms

End of Stream

2

ms

Duration of acknowledge condition

400

520

ms

(MODE/DATE line pulled low by the

device)

Acknowledge valid time

2

ms

(1)

Device is switching with no load on the output, L = 3.3mH, value includes losses of the coil

(2)

powered down.

(3)

until the device has been enabled first time (EN1 or EN2 = high). After first enable, Note 3 becomes valid.

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Product Folder Link(s): TPS62420 TPS62421