MAX8551ETI datasheet(4/29 Pages) MAXIM

Part #	MAX8551ETI

Description	Integrated DDR Power-Supply Solutions for Desktops, Notebooks, and Graphic Cards

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Manufacturer	MAXIM [Maxim Integrated Products]

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Integrated DDR Power-Supply Solutions for

Desktops, Notebooks, and Graphic Cards

4

_______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MOSFET DRIVERS

DH Gate-Driver On-Resistance

VBST - VLX = 5V

1

4

Ω

DL Gate-Driver On-Resistance in

High State

14

Ω

DL Gate-Driver On-Resistance in

Low State

0.5

3

Ω

DH falling to DL rising

30

Dead Time (Additional to

Adaptive Delay)

DL falling to DH rising

30

ns

INPUTS AND OUTPUTS

Rising edge

1.20

1.7

2.20

V

Logic Input Threshold

(SHDN_, STBY, SKIP (Note 4))

Hysteresis

225

mV

Logic Input Current

(SHDN_, STBY, SKIP (Note 4))

-1

+1

µA

Low (2.5V output)

0.05

Dual-Mode™ Input Logic

Levels (FB)

High (1.8V output)

2.1

V

Input Bias Current (FB)

-0.1

+0.1

µA

High

AVDD -

0.4

Floating

3.15

3.85

REF

1.65

2.35

Four-Level Input Logic Levels

(TON, OVP/UVP (Note 4))

Low

0.5

V

Logic Input Current

(TON, OVP/UVP (Note 4))

-3

+3

µA

FB = GND

90

175

350

FB = AVDD

70

135

270

OUT Input Resistance

FB adjustable mode

400

800

1600

k

Ω

OUT Discharge-Mode

On-Resistance

(Note 4)

10

25

Ω

DL Turn-On Level During

Discharge Mode

(Measured at OUT)

(Note 4)

0.3

V

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +15V, VDD = AVDD = VSHDNA = VSHDNB = VBST = VILIM = 5V, VOUT = VREFIN = VVTTI = 2.5V, UVP/OVP = STBY = FB = SKIP

= GND, PGND1 = PGND2 = LX = GND, TON = OPEN, VVTTS = VVTT, TA = -40°C to +85°C, unless otherwise noted. Typical values

are at TA = +25°C.) (Note 1)

Dual Mode is a trademark of Maxim Integrated Products, Inc.

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