Jan28-08 RevE

SP6127 TSOT-6 PFET Buck Controller

 2007 Exar Corporation

Page 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.

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

°C, and those denoted by ♦ apply over the full operating range, -40°C< T

°C. Unless

µF.

PARAMETER

MIN

TYP

MAX

UNITS

♦

CONDITIONS

UVLO Turn-On Threshold

4.2

4.35

4.5

V

0

°C< T

°C

UVLO Turn-Off Threshold

4.0

4.15

4.4

V

0

°C< T

°C

UVLO Hysteresis

0.2

V

Operating Input Voltage Range

4.5

29

V

0

°C< T

°C

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

750

900

1050

kHz

Peak-to-peak ramp Voltage

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

VIN

Gate Driver Pull-Down

Resistance

4

8

resistance between GATE and VDR

Gate Driver Pull-up Resistance

3

6

resistance between GATE and VIN

VIN - VDR voltage difference

4.5

5.5

V

♦

Measure VIN – VDR, VIN>7V

Overcurrent Threshold

270

300

330

mV

Measure VIN - LX

LX pin Input Current

25

30

35

uA

OFF interval during hiccup

70

ms

Soft start time

3

5

9

ms

VFB=0.58V, measure between

VIN=4.5V and first GATE pulse

SHDN Threshold

0.8

1.0

1.2

V

♦

Apply voltage to FB

SHDN Threshold Hysteresis

100

mV

ABSOLUTE MAXIMUM RATINGS