Mar 29-07 RevD

SP6126: TSOT-6 PFET Buck Controller

 2007 Sipex Corporation

2

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.

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, 10 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

510

600

690

kHz

Peak-to-peak ramp Modulator

V

Minimum ON-Time 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

Measure

resistance between GATE and VDR

Gate

Driver

Pull-up

Resistance

3

6

Measure

4.5

5.5

V

♦

Overcurrent Threshold

270

300

330

mV

LX pin Input Current

25

30

35

uA

OFF interval during hiccup

100

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