LTM4650 datasheet(8/138 Pages) AD

8 / 138 page

LTM4664A

Rev. 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range (Note 1, 2, 3). Specified as each individual output channel designated with n (Note 3). TA = 25°C,

VINS3 = 12V, RUN_Cn = 3.3V, EXTVCC = 0V, FREQUENCY_SWITCH = 350kHz and VOUTCn commanded to 1.000V unless otherwise noted.

Configured with factory default EEPROM settings, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DUAL 25A/30A PSM OUTPUT

VINS3

Input DC Voltage Operating

VOUTCn

Range of Output Voltage

Regulation

VOUTCn Diff Sensed on VOSNS+_Cn/VOSNS–_Cn-Pin-Pair;

Commanded by Serial Bus or with Resistors

Present at Start-Up on VOUTCn_CFG, Differential

Remote Sense Path Voltage (Notes 4, 6)

0.5

1.5

VOUTCn(DC)

Output Voltage, Total Variation with

Line and Load

Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b)

Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b)

VOUTCn_CFG Commanded to 1.000V, VOUTCn Low

Range (MFR_PWM_MODEn[1] = 1b) (Note 6)

0.995

0.985

1.000

1.005

1.015

VINS3 UVLO

Undervoltage Lockout Threshold

VINTVCC Falling

VINTVCC Rising

3.55

3.9

IINRUSH(VINS3)

Input Inrush Current at Start-Up

VOUTCn =1V, VINS3 = 12V; No Load Besides Capacitors;

TON_RISEn = 3ms

400

IS(VINS3,DCM)

Input Supply Current in

Discontinuous Mode Operation

Discontinuous Mode, MFR_PWM_MODEn[0] = 0b,

IOUTCn = 100mA

IS(VINS3,FCM)

Input Supply Current in

Forced-Continuous Mode Operation

Forced Continuous Mode, MFR_PWM_MODEn[0] = 1b

IOUTn = 100mA

IOUTn = 30A VINS3 = 12V, VOUTn = 1V

3.0

IS(VINS3,SHUTDOWN) Input Supply Current in Shutdown

Shutdown, RUN_Cn = 0V

Output Specifications

IOUTCn

Output Continuous Current Range

Utilizing MFR_PWM_MODE[7] = 0 ,

and Using ~IOUT = 34A , Page103, (Note 4)

∆

ΔVOUTn(LINE)

VOUTn

Line Regulation Accuracy

Digital Servo Engaged (MFR_PWM_MODEn[6] = 0b)

Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b)

Open Circuit; IOUTCn = 0A, 7V ≤ VIN ≤ 16V, VOUT Low

Range (MFR_PWM_MODEn[1] = 1b),

FREQUENCY_SWITCH = 350kHz (Note 6)

0.03

±0.2

%/V

∆

ΔVOUTn(LOAD)

VOUTn

Load Regulation Accuracy

Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b)

Digital Servo Disengaged (MFR_PWM_MODEn[6] = 0b)

0A ≤ IOUTn ≤ 30A, VOUT Low Range,

(MFR_PWM_MODEn [1] = 1b) (Note 6)

0.03

0.2

0.5

VOUTn(AC)

Output Voltage Ripple

fS (Each Channel)

VOUTCn Ripple Frequency

FREQUENCY_SWITCH Set to 350kHz (0xFABC)

320

350

380

kHz

ΔVOUTCn(START)

Turn-On Overshoot

TON_RISEn = 3ms (Note 7)

tSTART

Turn-On Start-Up Time

Time from VIN Toggling from 0V to 12V to Rising Edge

PGOOD_Cn, TON_DELAYn = 0ms, TON_RISEn = 3ms

tDELAY(0ms)

Turn-On Delay Time

Time from First Rising Edge of RUN_Cn to Rising Edge

of PGOOD_Cn. TON_DELAYn = 0ms, TON_RISEn =

3ms, VINS3 Having Been Established for at Least 70ms

2.9

3.3

3.7

ΔVOUTn(LS)

Peak Output Voltage

Deviation for Dynamic Load Step

Load: 0A to 12.5A and 12.5A to 0A at 12.5A/μs,

VOUTn = 1V, VINS3 = 12V (Note 7) See Load Transient

Graph

tSETTLE

Settling Time for

Dynamic Load Step

Load: 0A to 12.5A and 12.5A to 0A at 12.5A/μs,

VOUTn = 1V, VINS3 = 12V (Note 7) See Load Transient

Graph

µs

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