LTM4650 datasheet(9/138 Pages) AD

9 / 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

IOUTn(OCL_AVg)

Output Current Limit, Time Averaged

Time-Averaged Output Inductor Current Limit Inception

Threshold, Commanded by IOUT_OC_FAULT_LIMITn

(Note 7) Utilizing MFR_PWM_MODE[7] = 0b, and Using

~IOUT = 34A , Page103

Control Section

VFBCMn

Feedback Input

Common Mode Range

VOSNS–_Cn Valid Input Range (Referred to SGND)

VOSNS+_Cn Valid Input Range (Referred to SGND)

–0.1

0.3

3.6

VOUTn-RNGL

Full-Scale Command Voltage

Range Low (0.5V to 2.75V)

Set Point Accuracy

Resolution

LSB Step Size

Limit Design to 1.5V Operating for Module

MFR_PWM_MODEn[1] = 1b, VOUTn Commanded to

2.75V (Notes 8, 10)

–0.5

2.75

0.688

0.5

Bits

VOUTn-RNGH

Full-Scale Command Voltage

Range High (0.5V to 3.6V)

Set Point Accuracy

Resolution

LSB Step Size

Limit Design to 1.5V Operating for Module

MFR_PWM_MODEn[1] = 0b, VOUTn Commanded to

3.60V (Notes 8, 10)

–0.5

3.60

1.375

0.5

Bits

RVSENSEn+

VOSNS+_Cn Impedance to SGND

0.05V ≤ VVOSNS+_Cn – VSGND ≤ 3.3V

kΩ

tON(MIN)

Minimum On-Time

(Note 10 )

nsec

gm0,1

Resolution

Error Amplifier gm(max)

Error Amplifier gm(min)

LSB Step Size

COMP0,1 = 1.35V, MFR_PWM_CONFIG[7:5] = 0 to 7

MFR_PWW_CONFIG Section (Note 10)

5.76

0.68

Bits

mmho

RCOMP0, 1

Resolution

Compensation Resistor RCOMP(MAX)

Compensation Resistor RCOMP(MIN)

MFR_PWM_CONFIG[4:0] = 0 to 31

(See Figure 1, Note 10)

0.5

Bits

kΩ

Analog OV/UV Ch 0,1(Overvoltage/Undervoltage) Output Voltage Supervisor Comparators (VOUT_OV/UV_FAULT_LIMIT and VOUT_OV/UV_WARN_

LIMIT Monitors)

NOV/UV_COMP

Resolution, Output

Voltage Supervisors

(Notes 9, 10)

Bits

VOV-RNG

Output OV Comparator

Threshold Detection Range

(Notes 9, 10) Limit Design to 1.5V Operating for Module

Low Range Scale, MFR_PWM_MODEn[1] = 1b

High Range Scale, MFR_PWM_MODEn[1] = 0b

0.5

2.7

3.6

VOUSTP

Output OV and UV

Comparator Threshold

Programming LSB Step Size

(Notes 9, 10)

Low Range Scale, MFR_PWM_MODEn[1] = 1b

High Range Scale, MFR_PWM_MODEn[1] = 0b

5.6

11.2

VOV-ACC-Cn

Output OV Threshold Accuracy

Range Low

Range High

(Notes 9, 10)

0.5V ≤ VVOSNS+_Cn – VVOSNS–_Cn ≤ 2.7V, MFR_PWM_

MODEn[1] = 1b

1V ≤ VVOSNS+_Cn – VVOSNS–_Cn ≤ 3.6V, MFR_PWM

MODEn[1] = 0b

±1.5

±40

LTM4650 Datasheet(PDF) 9 Page - Analog Devices

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