LM5115 datasheet(2/17 Pages) NSC

2 / 17 page

Connection Diagram

20134902

16-Lead TSSOP, LLP

See NS Package Numbers MTC16 and SDA16A

Ordering Information

Ordering Number

Package Type

NSC Package Drawing

Supplied As

LM5115MM

TSSOP-16

MTC16

1000 shipped as Tape & Reel

LM5115MMX

TSSOP-16

MTC16

3500 shipped as Tape & Reel

LM5115SD

LLP-16

SDA16A

Available Soon

LM5115SDX

LLP-16

SDA16A

Available Soon

Pin Description

NAME

DESCRIPTION

APPLICATION INFORMATION

Current Sense amplifier positive input

A low inductance current sense resistor is connected between

CS and VOUT. Current limiting occurs when the differential

voltage between CS and VOUT exceeds 45mV (typical).

VOUT

Current sense amplifier negative input

Connected directly to the output voltage. The current sense

amplifier operates over a voltage range from 0V to 12V at the

VOUT pin.

AGND

Analog ground

Connect directly to the power ground pin (PGND).

Current limit output

For normal current limit operation, connect the CO pin to the

COMP pin. Leave this pin open to disable the current limit

function.

COMP

Compensation. Error amplifier output

COMP pin pull-up is provided by an internal 300uA current

source.

Feedback. Error amplifier inverting input

Connected to the regulated output through the feedback resistor

divider and compensation components. The non-inverting input

of the error amplifier is internally connected to the SS pin.

Soft-start control

An external capacitor and the equivalent impedance of an

internal resistor divider connected to the bandgap voltage

reference set the soft-start time. The steady state operating

voltage of the SS pin equal to 0.75V (typical).

RAMP

PWM Ramp signal

An external capacitor connected to this pin sets the ramp slope

for the voltage mode PWM. The RAMP capacitor is charged

with a current that is proportional to current into the SYNC pin.

The capacitor is discharged at the end of every cycle by an

internal MOSFET.

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