600kHz 3A Step-Down Switching Regulator

TJ4519

Jul. 2010 – Preliminary

- 4 -

HTC

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITION

MIN.

TYP.

MAX.

UNIT

Operating Input Voltage

24

(1)

V

Maximum Switch Current Limit

3.5

5.5

A

Oscillator Frequency

500

600

700

kHz

Switch On Voltage Drop

570

mV

3.9

4.4

V

60

mV

3

5

mA

Standby Current

100

150

uA

Feedback Input Current

-0.25

-1

uA

Feedback Voltage

0.784

0.8

0.816

V

Feedback Voltage Line Regulation

(2)

+3

mV/V

(3)

150

350

V/V

(3)

500

850

1300

uMho

70

110

uA

-70

-110

uA

Transconductance

5

A/V

Maximum Switching Threshold

Duty cycle = 0%

0.6

V

2

V

0.25

V

Maximum, Switch Duty Cycle

85

%

Minimum Boost Voltage

Above Switch

2.7

V

10

15

Boost Current

30

45

mA

Enable Input Threshold Voltage

1.1

1.27

1.5

V

EN = 50mV below threshold

8

uA

Enable Output Bias Current

EN = 50mV above threshold

10

uA

Notes:

(1) The device may not function properly outside its operating input voltage range.

(2) The required minimum input voltage for a regulated output depends on the output voltage and load condition.

(3) Guaranteed by design.