LTM4630 datasheet(3/34 Pages) LINER

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LTM4630

4630fa

For more information www.linear.com/LTM4630

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range. Specified as each individual output channel. TA = 25°C (Note 2), VIN = 12V and VRUN1, VRUN2 at 5V

unless otherwise noted. Per the typical application in Figure 23.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

4.5

VOUT

Output Voltage

0.6

1.8

VOUT1(DC),

VOUT2(DC)

Output Voltage, Total Variation with

Line and Load

CIN = 22µF ×3, COUT = 100µF ×1 Ceramic,

470µF POSCAP

VIN = 12V, VOUT = 1.5V, IOUT = 0A to 18A

1.477

1.5

1.523

Input Specifications

VRUN1, VRUN2

RUN Pin On/Off Threshold

RUN Rising

1.1

1.25

1.40

VRUN1HYS, VRUN2HYS RUN Pin On Hysteresis

150

IINRUSH(VIN)

Input Inrush Current at Start-Up

IOUT = 0A, CIN = 22µF ×3, CSS = 0.01µF,

COUT = 100µF ×3, VOUT1 = 1.5V, VOUT2 = 1.5V,

VIN = 12V

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 = 5V, VOUT = 1.5V, IOUT = 18A

VIN = 12V, VOUT = 1.5V, IOUT = 18A

2.6

Output Specifications

IOUT1(DC), IOUT2(DC) Output Continuous Current Range

VIN = 12V, VOUT = 1.5V (Note 7)

ΔVOUT1(LINE)/VOUT1

ΔVOUT2(LINE)/VOUT2

Line Regulation Accuracy

VOUT = 1.5V, VIN from 4.5V to 15V

IOUT = 0A for Each Output,

0.01

0.025

%/V

ΔVOUT1/VOUT1

ΔVOUT2/VOUT2

Load Regulation Accuracy

For Each Output, VOUT = 1.5V, 0A to 18A

VIN = 12V (Note 7)

0.5

0.75

VOUT1(AC), VOUT2(AC) Output Ripple Voltage

For Each Output, IOUT = 0A, COUT = 100µF ×3/

X7R/Ceramic, 470µF POSCAP, VIN = 12V,

VOUT = 1.5V, Frequency = 450kHz

mVP-P

fS (Each Channel)

Output Ripple Voltage Frequency

VIN = 12V, VOUT = 1.5V, fSET = 1.25V (Note 4)

500

kHz

fSYNC

(Each Channel)

SYNC Capture Range

400

780

kHz

ΔVOUTSTART

(Each Channel)

Turn-On Overshoot

COUT = 100µF/X5R/Ceramic, 470µF POSCAP,

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

tSTART

(Each Channel)

Turn-On Time

COUT = 100µF/X5R/Ceramic, 470µF POSCAP,

No Load, TRACK/SS with 0.01µF to GND,

VIN = 12V

ΔVOUT(LS)

(Each Channel)

Peak Deviation for Dynamic Load

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

COUT = 22µF ×3/X5R/Ceramic, 470µF POSCAP

VIN = 12V, VOUT = 1.5V

tSETTLE

(Each Channel)

Settling Time for Dynamic Load

Step

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

VIN = 12V, COUT = 100µF, 470µF POSCAP

µs

IOUT(PK)

(Each Channel)

Output Current Limit

VIN = 12V, VOUT = 1.5V

Control Section

VFB1, VFB2

Voltage at VFB Pins

IOUT = 0A, VOUT = 1.5V

0.592

0.600

0.606

IFB

(Note 6)

–5

–20

VOVL

Feedback Overvoltage Lockout

0.64

0.66

0.68

TRACK1 (I),

TRACK2 (I)

Track Pin Soft-Start Pull-Up Current TRACK1 (I),TRACK2 (I) Start at 0V

1.25

1.5

µA

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