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LM73605, LM73606

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SNVSAH5 – SEPTEMBER 2017

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Electrical Characteristics (continued)

Minimum and maximum limits are specified through test, design or statistical correlation. Typical values represent the most

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

(2)

This current limit was measured as the internal comparator trip point. Due to inherent delays in the current limit comparator and drivers,

the peak current limit measured in closed loop with faster slew rate will be larger, and valley current limit will be lower.

(3)

Measured at pins

(4)

Ensured by design

HIGH SIDE DRIVER (CBOOT PIN)

CBOOT - SW undervoltage

lockout

1.6

2.2

2.7

V

CURRENT LIMITS AND HICCUP

Short-circuit, high-side

LM73605

6

7.3

8.35

A

LM73606

7.4

8.7

9.85

LM73605

4.79

5.5

6.1

A

LM73606

5.8

6.6

7.25

Negative current limit

LM73605

–5

A

LM73606

–6

Hiccup threshold on FB pin

0.36

0.4

0.44

V

Zero cross-current limit

0.06

A

SOFT START (SS/TRK PIN)

Soft-start charge current

1.8

2

2.2

µA

Soft-start discharge

resistance

UVLO, TSD, OCP, or EN = 0

1

kΩ

POWER GOOD (PGOOD PIN) and OVERVOLTAGE PROTECTION

Power-good overvoltage

threshold

% of FB voltage

106%

110%

113%

Power-good undervoltage

threshold

% of FB voltage

86%

90%

93%

Power-good hysteresis

% of FB voltage

1.2%

Minimum input voltage for

proper PGOOD function

1.3

2

V

Power-good ON-resistance

40

100

Ω

30

90

MOSFETS

(3)

High-side MOSFET ON-

resistance

53

90

m

Ω

(3)

Low-side MOSFET ON-

resistance

31

55

m

Ω

THERMAL SHUTDOWN

(4)

Thermal shutdown threshold

Shutdown threshold

160

°C

Recovery threshold

135

°C

(1)

Ensured by design

6.6 Timing Characteristics

MIN

NOM

MAX

UNIT

CURRENT LIMITS AND HICCUP

(1)

Number of switching cycles

before hiccup is tripped

128

Cycles

Overcurrent hiccup retry delay

time

46

ms