5

LT1370

TEMPERATURE (

°C)

–50

400

500

600

150

LT1370 • G11

300

200

0

0

50

100

100

800

700

–25

25

75

125

Feedback Input Current

vs Temperature

TEMPERATURE (

°C)

–50

–50

–30

0

0

50

75

LT1370 • G12

–40

–10

–20

–25

25

100 125

150

Negative Feedback Input Current

vs Temperature

Clamp Voltage vs Temperature

TEMPERATURE (

°C)

–50

1.0

1.4

2.2

0

50

75

LT1370 • G10

1.2

1.8

2.0

1.6

–25

25

100 125

150

sation, current limiting and soft start. It is the output of the

error amplifier and the input of the current comparator.

Loop frequency compensation can be performed with an

Applications Information.

FB: The Feedback pin is used for positive output voltage

sensing and oscillator frequency shifting. It is the invert-

ing input to the error amplifier. The noninverting input of

this amplifier is internally tied to a 1.245V reference.

NFB: The Negative Feedback pin is used for negative

output voltage sensing. It is connected to the inverting

input of the negative feedback amplifier through a 100k

source resistor.

S/S: Shutdown and Synchronization Pin. The S/S pin is

logic level compatible. Shutdown is active low and the

shutdown threshold is typically 1.3V. For normal opera-

synchronize switching, drive the S/S pin between 600kHz

and 800kHz. See Applications Information.

10

µF or More. The regulator goes into undervoltage lock-

and has large currents flowing through it. Keep the traces

to the switching components as short as possible to

minimize radiation and voltage spikes.

GND: Tie all ground pins to a good quality ground plane.

See Applications Information.