LTM4609 datasheet(5/38 Pages) LINER

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LTM4636-1

46361fa

For more information www.linear.com/LTM4636-1

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 12V, per the typical application in Figure 20.

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 LTM4636-1 is tested under pulsed load conditions such that

TJ ≈ TA. The LTM4636-1E is guaranteed to meet performance

specifications over the 0°C to 125°C internal operating temperature

range. Specifications over the full –40°C to 125°C internal operating

temperature range are assured by design, characterization and correlation

with statistical process controls. The LTM4636-1I 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.

Note 3: The minimum on-time condition is specified for a peak-to-peak

inductor ripple current of ~40% of IMAX Load. (See the Applications

Information section)

Note 4: See output current derating curves for different VIN, VOUT and TA.

Note 5: Guaranteed by design.

Note 6: 100% tested at wafer level.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Oscillator and Phase-Locked Loop

fOSC

Oscillator Frequency

VPHSMD = 0V

RFREQ = 30.1k

RFREQ = 47.5k

RFREQ = 54.9k

RFREQ = 75.0k

Maximum Frequency

Minimum Frequency

210

540

625

945

1.2

250

600

750

1.05

290

660

825

1.155

0.2

kHz

MHz

IFREQ

FREQ Pin Output Current

VFREQ = 0.8V

µA

RMODE/PLLIN

MODE_PLLIN Input

Resistance

250

VMODE/PLLIN

PLLIN Input Threshold

VMODE/PLLIN Rising

VMODE/PLLIN Falling

1.2

VCLKOUT

Low Output Voltage

High Output Voltage

Verified Levels

Measurements on CLKOUT

0.2

5.2

PWM-CLKOUT

PWM to Clockout Phase Delay

VPHMODE = 0V

VPHMODE = 1/4 INTVCC

VPHMODE = Float

VPHMODE = 3/4 INTVCC

VPHMODE = INTVCC

120

180

Deg

PWM/PWMEN Outputs

PWM

PWM Output High Voltage

ILOAD = 500µA

5.0

PWM Output Low Voltage

ILOAD = –500µA

0.5

Temperature Diode

Diode VF

Diode Forward Voltage

I = 100µA, TEMP+ to TEMP–

0.598

Temperature Coefficient

–2.0

mV/°C

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