LT7184S datasheet(9/52 Pages) AD

9 / 52 page

Data Sheet

LT7184S

analog.com

Rev. 0

9 of 52

(TA = 25°C for typical values. For minimum and maximum values, specifications apply over the full operating

temperature range unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

OUTPUT CURRENT READBACK

READ_IOUT Accuracy3

IOUT = 0A to 4A, VOUT/VIN ≤ 0.25,

500kHz ≤ fSW ≤ 2MHz

-350

350

IOUT = 4A to 8A, VOUT/VIN ≤ 0.25,

500kHz ≤ fSW ≤ 2MHz

-8.75

8.75

IOUT = 0A to 4A, VOUT/VIN > 0.25

-600

600

All other conditions 4 ≤ IOUT ≤ 8A

-15

FREQUENCY READBACK

READ_FREQUENCY

Accuracy

fSW < 600kHz, TA= 25°C

-30

kHz

fSW ≥ 600kHz, TA= 25°C

-5

ELECTRICALLY ERASABLE PROGRAMMABLE READ-ONLY MEMORY (EEPROM) CHARACTERISTICS4

Retention

years

Endurance

10,000

writes

Mass Write Time

(STORE_USER_ALL)

250

500

DIGITAL INPUTS: RUNN, FAULTN, PGOODN, SHARE_CLK, SCL, SDA, ALERT, WP

Input High Threshold (VIH)

1.1

1.35

Input Low Threshold (VIL)

0.8

0.9

Hysteresis (VHYS)

200

Leakage Current

Applied Voltage = 0V, 5.5V, TA = 25°C

±10

μA

Input Capacitance5

TA = 25°C

DIGITAL CLOCK INPUT: SYNC

Peak-To-Peak Input

Voltage Swing

Sync Input Mode

1.4

5.5

Rise Time

Sync Input Mode

Duty Cycle

Sync Input Mode

DIGITAL CLOCK OUTPUT: SYNC

Output High Voltage (VOH) SYNC Output Mode

1.6

1.88

1.98

Output Low Voltage (VOL)

SYNC Output Mode

0.2

Output Impedance

SYNC Output Mode

CURRENT-LIMITED OPEN-DRAIN OUTPUTS: RUNN, FAULTN

Pull-Down Current

Applied Voltage = 0.4V to 5.5V

1.5

OPEN-DRAIN OUTPUTS: PGOODN, SHARE_CLK

Output Low Voltage

I = 6mA

0.4

DIGITAL I/O: SCL, SDA, ALERT

Data Output Hold-Time

450

Delay from RESTORE_USER_ALL, MFR_RESET, or Application of PVIN0 or EXTVCC until the TON_DELAY timer

can begin.

The LT7184S switching regulators use valley current mode control, so the current limits specified

correspond to the valley of the inductor current waveform. Valley current limit moves with VOUT/L and with

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