LTM4657 datasheet(3/26 Pages) AD

3 / 26 page

LTM4658

Rev. 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified operating

temperature range, otherwise specifications are at TA = 25°C, (Note 2). VIN = 3.3V per the typical application.

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 LTM4658 is tested under pulsed load conditions such

that TJ ≈ TA. The LTM4658E 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

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IQ(VIN)

Input Supply Bias Current

Pulse-Skipping Mode

Forced Continuous Mode

Shutdown

MODE/SYNC = FREQ = VIN, VOUT = 1.5V

MODE/SYNC = 0V, FREQ = VIN, VOUT = 1.5V

RUN = 0V

1.6

μA

IS(VIN)

Input Supply Current

VOUT = 1.5V, IOUT = 10A

5.5

IOUT(DC)

Output Continuous Current Range

VOUT = 1.5V (Note 4)

∆VOUT(Line)/VOUT Line Regulation Accuracy

FREQ = VIN, VOUT = 1.5V, VIN = 2.25V to 5.5V,

IOUT = 0A

0.001

0.30

%/V

∆VOUT(Load)/VOUT Load Regulation Accuracy

VIN = FREQ = 3.3V, MODE/SYNC = 1.0MHz,

VOUT = 0.5V,

IOUT = 0A to 8A

IOUT = 0A to 10A (Notes 3 and 4)

0.2

1.5

VOUT(AC)

Output Ripple Voltage

IOUT = 0A, COUT = 100μF + 2× 22μF Ceramic

(Notes 4)

100

∆VOUT(START)

Turn-On Overshoot

IOUT = 0A, COUT = 100μF + 2× 22μF Ceramic

(Notes 4)

tSTART

Turn-On Time

COUT = 100μF + 2× 22μF Ceramic, No Load,

SSTT = 0.1μF (Note 4)

ISSTT

Track Pin Soft-Start Pull-Up Current

SSTT = 0.5V

μA

∆VOUTLS

Peak Deviation for Dynamic Load

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

COUT = 100μF + 2× 22μF Ceramic

(Note 4)

157

tSETTLE

Settling Time for Dynamic Load Step

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

COUT = 100μF + 2× 22μF Ceramic,

(Note 4)

μs

IOUTPK

Output Current Limit

VIN = 3.3V, VOUT = 0.5V

VFB

Voltage at VFB Pin

IOUT = 0A, VOUT = 1.5V

0.495

0.50

0.505

IFB

Current at VFB Pin

±20

VPGOOD

PGOOD Trip Level

Undervoltage Falling Threshold

Overvoltage Rising Threshold

As a Percentage of Regulated VOUT

VFB Ramping Negative

VFB Ramping Positive

–4

–3

–2

IPGOOD

PGOOD Leakage

VPGOOD = 5.5V

fOSC

Oscillator Frequency

MHz

SYNC_RANGE

Sync Frequency Range

FREQ = VIN

1.0

2.6

MHz

SYNC_LEVEL

Clock Level High on SYNC

Clock Level Low on SYNC

1.2

0.4

with statistical process controls. The LTM4658I 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: See output current derating curves for different VIN, VOUT and TA.

Note 4: Guaranteed by design.

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