LM3495MTCX datasheet(5/36 Pages) TI

Part #	LM3495MTCX

Description	Emulated Peak Current Mode Buck Controller for Low Output Voltage

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LM3495

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SNVS410F – FEBRUARY 2006 – REVISED APRIL 2013

Electrical Characteristics (continued)

Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction

Temperature (TJ) range. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical

values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless

otherwise indicated, VIN = 12V.

Symbol

Parameter

Conditions

Min

Typ(1)

Max

Units

ISOURCE

COMP/SD Pin Source Current

VFB = 0.5V, COMP/SD = 1.5V

40

µA

ISINK

COMP/SD Pin Sink Current

VFB = 0.7V, COMP/SD = 1.5V

40

µA

VCOMP-HI

COMP/SD Pin Voltage High Clamp

VFB = 0.5V

2

V

VCOMP-LO

COMP/SD Pin Voltage Low Clamp

VFB = 0.7V

0.9

V

TRACKING

VTEND

Track End Threshold

0.6

V

VTRACK-OS

Track to FB Offset

TRACK = 0.55V

15

mV

INTERNAL VOLTAGE REGULATOR

VIN = 12V, VLIN5 Current = 25 mA

4.72

V

VVLIN5

Voltage at VLIN5 Pin(2)

VIN = 3.3V, VLIN5 Current = 25 mA

3.0

V

LOGIC INPUTS AND OUTPUTS

VSD-HI

COMP/SD Pin Logic High Trip Point

COMP/SD Pin Voltage Rising

0.3

0.4

V

VSD-LO

COMP/SD Pin Logic Low Trip Point

COMP/SD Pin Voltage Falling

0.2

0.26

V

THERMAL CHARACTERISTICS

Junction-to-Ambient Thermal

θJA

155

°C/W

Resistance

TSD

Thermal Shutdown Threshold

150

°C

TSD-HYS

Thermal Shutdown Hysteresis

15

°C

(2)

VLIN5 provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.

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