LTC6902 datasheet(4/28 Pages) LINER

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LTM4632

4632fc

For more information www.linear.com/LTM4632

Note 1. Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2. The LTM4632 is tested under pulsed load conditions such that

TJ ≈ TA. The LTM4632E is guaranteed to meet performance specifications

over the 0°C to 125°C internal operating temperature range. Specifications

over the –40°C to 125°C internal operating temperature range are assured

by design, characterization and correlation with statistical process

controls. The LTM4632I is guaranteed to meet specifications over the

full –40°C to 125°C internal operating temperature range. Note that the

maximum ambient temperature consistent with these specifications is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal resistance and other environmental

factors.

ELECTRICAL CHARACTERISTICS The

denotes the specifications that apply over the specified internal

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

noted, per the typical application in Figure 19

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Control Section

VFB1

Voltage at VFB1 Pin

IOUT = 0A, VOUT1 = 1.3V

0.593

0.600

0.607

IFB1

Current at VFB1 Pin

(Note 4)

±30

RFBHI1

Resistor Between VOUT1 and

VFB1 Pins

60.00

60.40

60.80

kΩ

VTTR

VTTR Voltage Reference

VDDQIN = 1.3V,

IVTTR = ±10mA, CVTTR < 10nF

0.492x

VDDQIN

0.50x

VDDQIN

0.508x

VDDQIN

VRUN1, VRUN2

RUN Pin On Threshold

RUN Threshold Rising

RUN Threshold Falling

1.18

0.95

1.28

1.01

1.39

1.05

IRUN1, IRUN2

RUN Pin Leakage Current

±1

µA

ITRACK/SS1

TRACK/SS1 Pin Soft-Start Pull-Up

Current

TRACK/SS1 = 0V

1.2

µA

tON(MIN)

Minimum On-Time

(Note 4)

tOFF(MIN)

Minimum Off-Time

(Note 4)

VPGOOD

PGOOD Trip Level

VFB With Respect to 0.6V

VOUT2 With Respect to VDDQIN/2 (Note 4)

Ramping Negative

Ramping Positive

–8

–14

RPGOOD

PGOOD Pull-Down Resistance

1mA Load

VINTVCC

Internal VCC Voltage

VIN = 3.6V to 15V

3.1

3.3

3.5

VINTVCC Load Reg

INTVCC Load Regulation

ICC = 0 to 50mA

1.3

fOSC

Oscillator Frequency

MHz

SYNC

SYNC Threshold Voltage

0.95

ISYNC/MODE

MODE Input Current

SYNC/MODE = INTVCC

–1.5

µA

Note 3. See output current derating curves for different VIN, VOUT and TA.

Note 4. 100% tested at wafer level.

Note 5. This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

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