Rainbow-electronics MAX17000 Manual de usuario descargar pdf (Pagina 5)

MAX17000

Complete DDR2 and DDR3 Memory

Power-Management Solution

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

= 12V, V

= V

SHDN

= V

REFIN

= 5V, V

CSL

= 1.8V, STDBY = SKIP = AGND, T

= 0°C to +85°C, unless otherwise noted.

Typical values are at T

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CURRENT LIMIT

Valley Current-Limit Threshold V

LIMIT

CSH

- V

CSL

17 20 25 mV

Current-Limit Threshold

(Negative)

NEG

CSH

- V

CSL

, SKIP = V

-23 mV

Current-Limit Threshold

(Zero Crossing)

CSH

- V

CSL

1mV

SMPS GATE DRIVERS

DH Gate Driver On-Resistance R

BST - LX forced to 5V 1.5 5.0 Ω

DL high 1.5 5.0

DL Gate Driver On-Resistance R

DL low 0.6 3.0

DH Gate Driver Source/

Sink Current

DH forced to 2.5V, BST - LX forced to 5V 1 A

(

SRC

)

DL forced to 2.5V 1

DL Gate Driver Source/

Sink Current

(

SNK

)

DL forced to 2.5V 3

DL rising, T

= +25°C 10 25

Dead Time t

DEAD

DL falling, T

= +25°C 15 35

Internal BST Switch

On-Resistance

BST

= 10mA,

= 5V internal design target

4.5 Ω

LX, BST Leakage Current

BST

= V

= 26V, SHDN = AGND,

= +25°C

0.001 20 μA

INPUTS AND OUTPUTS

Logic Input Threshold

SHDN, STDBY, SKIP, OVP, rising edge

hysteresis = 300mV/600mV (min/max)

1.30 1.65 2.00 V

Logic Input Current

SHDN, STDBY, SKIP = 0 or V

= +25°C

-1 +1 μA

Input Leakage Current CSH = 0 or V

, T

= +25°C -1 +1 μA

Input Bias Current CSL = 0 or V

55 100 μA

1 2 3 4 5 6 7 8 9 10 ... 30 31

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Rainbow-electronics MAX17000 Manual de usuario Pagina 5

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