LTM8045 datasheet(3/30 Pages) LINER

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LTM4649

4649fc

For more information www.linear.com/LTM4649

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V per typical application.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

4.5

VOUT(RANGE)

Output Voltage Range

0.6

3.3

VOUT(DC)

Output Voltage, Total Variation with

Line and Load

CIN = 10µF × 1,COUT = 100µF Ceramic,

100µF POSCAP, RFB = 6.65k, MODE = GND,

VIN = 4.5V to 16V, IOUT = 0A to 10A

1.477

1.50

1.523

Input Specifications

VRUN

RUN Pin On Threshold

VRUN Rising

1.1

1.25

1.4

VRUN(HYS)

RUN Pin On Hysteresis

150

IQ(VIN)

Input Supply Bias Current

VIN = 12V, VOUT = 1.5V, Burst Mode Operation

VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode

VIN = 12V, VOUT = 1.5V, Switching Continuous

Shutdown, RUN = 0, VIN = 12V

µA

IS(VIN)

Input Supply Current

VIN = 12V, VOUT = 1.5V, IOUT = 10A

1.5

Output Specifications

IOUT(DC)

Output Continuous Current Range

VIN = 12V, VOUT = 1.5V (Note 4)

ΔVOUT(LINE)

VOUT

Line Regulation Accuracy

VOUT = 1.5V, VIN from 4.5V to 16V IOUT = 0A

0.010

0.04

%/V

ΔVOUT(LOAD)

VOUT

Load Regulation Accuracy

VOUT = 1.5V, IOUT = 0A to 10A, VIN = 12V

(Note 4)

0.15

0.5

VOUT(AC)

Output Ripple Voltage

IOUT = 0A, COUT = 100µF Ceramic, 100µF

POSCAP, VIN = 12V, VOUT = 1.5V

ΔVOUT(START)

Turn-On Overshoot

COUT = 100µF Ceramic, 100µF POSCAP,

VOUT = 1.5V, IOUT = 0A, VIN = 12V

tSTART

Turn-On Time

COUT = 100µF Ceramic, 100µF POSCAP,

No Load, TRACK/SS = 0.01µF, VIN = 12V

ΔVOUTLS

Peak Deviation for Dynamic Load

Load: 0% to 50% to 0% of Full Load,

COUT = 100µF Ceramic, 100µF POSCAP,

VIN = 12V, VOUT = 1.5V

tSETTLE

Settling Time for Dynamic Load Step

Load: 0% to 50% to 0% of Full Load,

COUT = 100µF Ceramic, 100µF POSCAP,

VIN = 12V, VOUT=1.5V

µs

IOUTPK

Output Current Limit

VIN = 12V, VOUT = 1.5V (Note 4)

Control Specifications

VFB

Voltage at VFB Pin

IOUT = 0A, VOUT = 1.5V

0.593

0.60

0.607

IFB

Current at VFB Pin

(Note 3)

–12

–25

VOVL

Feedback Overvoltage Lockout

0.64

0.66

0.68

ITRACK/SS

Track Pin Soft-Start Pull-Up Current

TRACK/SS = 0V

1.0

1.2

1.4

µA

tON(MIN)

Minimum On-Time

(Note 3)

RFBHI

Resistor Between VOUT_LCL and VFB

Pins

9.90

10.10

kΩ

DIFFP, DIFFN CM

RANGE

Common Mode Input Range

VIN = 12V, Run > 1.4V

3.6

VDIFFOUT(MAX)

Maximum DIFFOUT Voltage

IDIFFOUT = 300µA

INTVCC-1.4

VOS

Input Offset Voltage

VDIFFP = VDIFFOUT = 1.5V, IDIFFOUT = 100µA

Differential Gain

(Note 3)

V/V

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