LTM4686BEVPBF datasheet(4/130 Pages) AD

4 / 130 page

LTM4686B

Rev. 0

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ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified

internal operating temperature range (Note 2). Specified as each individual output channel (Note 4). TA = 25°C, VIN = 5V, RUNn = 5V,

FREQUENCY_SWITCH = 1MHz, VOUT_COMMANDn = 1V and VOUT_UV_FAULT_RESPONSEn = TON_MAX_FAULT_RESPONSEn = 0x00

unless otherwise noted. All other command codes configured per factory-default EEPROM settings unless otherwise noted. Tested per

Circuit 1, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

VIN

Input DC Voltage

Test Circuit 1; 4.5V ≤ SVIN ≤ 5.75V; INTVCC = SVIN; VIN_OFF < VIN_ON = 4.25V

Test Circuit 2; 4.5V ≤ SVIN ≤ 5.75V; INTVCC = SVIN; VIN_OFF < VIN_ON = 4.25V

4.5

2.375

5.75

VOUTn

Range of Output

Voltage Regulation

VOUT0 Differentially Sensed on VOSNS0+/VOSNS0– Pin-Pair;

VOUT1 Differentially Sensed on VOSNS1/SGND Pin-Pair;

Commanded by Serial Bus or with Resistors Present at Start-Up on

VOUTnCFG and/or VTRIMnCFG

0.5

3.6

VOUTn(DC)

Output Voltage, Total

Variation with Line and

Load

(Note 5)

VOUTn Low Range (MFR_PWM_MODEn[1] = 1b),

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

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

0.995

0.985

1.000

1.005

1.015

Input Specifications

IINRUSH(VIN)

Input Inrush Current at

Start-Up

Test Circuit 1, VOUTn =1V, VIN = 5V; No Load Besides Capacitors;

TON_RISEn = 3ms

400

IQ(SVIN)

Input Supply Bias

Current

Forced Continuous Mode, MFR_PWM_MODEn[0] = 1b

RUNn = 5V, RUN[1–n] = 0V, INTVCC = 5V

Shutdown, RUN0 = RUN1 = 0V, INTVCC Open Circuit

1.2

IS(VINn,PSM)

Input Supply Current

in Pulse-Skipping

Mode Operation

Pulse-Skipping Mode, MFR_PWM_MODEn[0] = 0b,

IOUTn = 100mA

IS(VINn,FCM)

Input Supply Current

in Forced-Continuous

Mode Operation

Forced Continuous Mode, MFR_PWM_MODEn[0] = 1b

IOUTn = 100mA

IOUTn = 14A

120

IS(VINn,SHUTDOWN) Input Supply Current

in Shutdown

Shutdown, RUNn = 0V

µA

Output Specifications

IOUTn

Output Continuous

Current Range

(Note 6)

∆VOUTn(LINE)

VOUTn

Line Regulation

Accuracy

Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b, Note 12)

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

SVIN and VINn and INTVCC Electrically Shorted Together;

IOUTn = 0A, 4.5V ≤ VIN ≤ 5.75V, VOUT Low Range

(MFR_PWM_MODEn[1] = 1b) FREQUENCY_SWITCH = 1MHz

(Referenced to 5VIN) (Note 5)

0.03

±0.2

%/V

∆VOUTn(LOAD)

VOUTn

Load Regulation

Accuracy

Digital Servo Engaged (MFR_PWM_MODEn[6] = 1b, Note 12)

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

0A ≤ IOUTn ≤ 14A, VOUT Low Range, (MFR_PWM_MODEn[1] = 1b)

FREQUENCY_SWITCH = 1MHz (Note 5)

0.03

0.2

0.5

VOUTn(AC)

Output Voltage Ripple (Note 12)

mVP-P

fS (Each

Channel)

VOUTn Ripple Frequency FREQUENCY_SWITCH Set to 1MHz (0x03E8)

950

1000

1050

kHz

∆VOUTn(START)

Turn-On Overshoot

TON_RISEn = 2ms (Note 12)

tSTART

Turn-On Start-Up Time Time from VIN Toggling from 0V to 5VIN to Rising Edge of GPIOn.

TON_DELAYn = 0ms, TON_RISEn = 2ms,

MFR_GPIO_PROPAGATEn = 0x0100,

MFR_GPIO_RESPONSEn = 0x0000

tDELAY(0ms)

Turn-On Delay Time

Time from First Rising Edge of RUNn to Rising Edge of GPIOn.

TON_DELAYn = 0ms, TON_RISEn = 3ms,

MFR_GPIO_PROPAGATEn = 0x0100,

MFR_GPIO_RESPONSEn = 0x0000.

VIN Having Been Established for at Least 39ms

2.7

3.1

3.5

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