Mar22-07 RevC

SP6125: TSOT-6 PFET Buck Controller

 2007 Sipex Corporation

2

ABSOLUTE MAXIMUM RATINGS

Input Voltage……................................................-0.3V to 30V

Lx………………………………………..………….…-2V to 30V

FB……………....................................................-0.3V to 5.5V

Storage Temperature..……..…………...……-65 °C to 150 °C

Junction Temperature.....................................-40°C to 125°C

Lead Temperature (Soldering, 1…0 sec)….…………..300 °C

ESD Rating……….…….…1kV LX, 2kV all other nodes, HBM

ELECTRICAL SPECIFICATIONS

PARAMETER

MIN

TYP

MAX

UNITS

♦

CONDITIONS

UVLO Turn-On Threshold

4.2

4.35

4.5

V

UVLO Turn-Off Threshold

4.0

4.2

4.4

V

UVLO Hysterisis

0.2

V

Operating Input Voltage

Range

4.5

29

V

Operating Input Voltage

Range

7

29

V

♦

Operating VCC Current

0.3

3

mA

VFB=1.2V

Reference Voltage Accuracy

0.5

1

%

Reference Voltage Accuracy

0.5

2

%

♦

Reference Voltage

0.594

0.6

0.606

V

Reference Voltage

0.588

0.6

0.612

V

♦

Switching Frequency

255

300

345

kHz

Peak-to-peak ramp Modulator

V

Minimum ON-Pulse Duration

40

100

ns

♦

Minimum Duty Cycle

0

%

Maximum Duty Cycle

100

%

Gate Driver Turn-Off

Resistance

50

60

k

Internal resistor between GATE and

Gate Driver Pull-Down

Resistance

4

8

resistance between GATE and VDR

Gate Driver Pull-up

Resistance

3

6

4.5

5.5

V

♦

Overcurrent Threshold

270

300

330

mV

LX pin Input Current

25

30

35

uA

OFF interval during hiccup

200

ms

Soft start time

3

5

9

ms

VFB=0.58V, measure between

SHDN Threshold

0.9

1.0

1.1

V

♦

Apply voltage to FB

SHDN Threshold Hysteresis

100

mV

These are stress

ratings

only,

and functional

operation of the device at these ratings or any other

above those indicated in the operation sections of the

specifications below is not implied.

Exposure to

absolute maximum rating conditions for extended

periods of time may affect reliability.