LTM4627EVPBF datasheet(4/28 Pages) LINER

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LTM4627

4627f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PSRR

Power Supply Rejection

Ratio

5V < VIN < 20V (Note 7)

100

RIN

Input Resistance

VOSNS+ to GND

kΩ

VPGOOD

PGOOD Trip Level

VFB With Respect to Set Output

VFB Ramping Negative

VFB Ramping Positive

–10

VPGL

PGOOD Voltage Low

IPGOOD = 2mA

0.1

0.3

INTVCC Linear Regulator

VINTVCC

Internal VCC Voltage

6V < VIN < 20V

4.8

5.2

VINTVCC Load Reg INTVCC Load Regulation

ICC = 0 to 50mA

0.5

VEXTVCC

External VCC Switchover

EXTVCC Ramping Positive

4.5

4.7

VLDO Ext

EXTVCC Voltage Drop

ICC = 25mA, VEXTVCC = 5V

100

Oscillator and Phase-Locked Loop

fSYNC

SYNC Capture Range

250

800

kHz

Frequency

Nominal

Nominal Frequency

VfSET = 1.2V

450

500

550

kHz

Frequency Low

Lowest Frequency

VfSET = 1V

350

400

450

kHz

Frequency High

Highest Frequency

VfSET ≥ 2.4V

700

770

850

kHz

IFREQ

Frequency Set Current

μA

RMODE_PLLIN

Mode_PLLIN Input

Resistance

250

kΩ

VIH_MODE_PLLIN

Clock Input Level High

2.0

VIL_MODE_PLLIN

Clock Input Level Low

0.8

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full internal operating

temperature range, otherwise speciﬁcations are at TA = 25°C (Note 2), VIN = 12V, per the typical application in Figure 18.

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 LTM4627 is tested under pulsed load conditions such that

TJ ≈ TA. The LTM4627E 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 LTM4627I 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: Limit current into the RUN pin to less than 2mA.

Note 6: Guaranteed by design.

Note 7: 100% tested at wafer level.

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