Rainbow-electronics MAX1855 Manual de usuario descargar pdf (Pagina 4)

MAX1716/MAX1854/MAX1855

High-Speed, Adjustable, Synchronous Step-Down

Controllers with Integrated Voltage Positioning

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = +15V, V

= V

= 5V, SKIP = V

, VPS = PGND, T

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

values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VGATE Lower Trip Threshold

Measured at FB with respect to unloaded

output voltage, falling edge

-12.5 -10 -7.5 %

VGATE Upper Trip Threshold

Measured at FB with respect to unloaded

output voltage, rising edge

7.5 10 12.5 %

VGATE Propagation Delay

Falling edge, FB forced 2% below or above

VGATE trip threshold

1.5 µs

VGATE Output Low Voltage I

SINK

= 1mA 0.4 V

VGATE Leakage Current High state, forced to 5.5V 1 µA

GATE DRIVERS

DH Gate Driver On-Resistance R

(

D H

)

BST

- V

forced to 5V 1.3 5 Ω

High state (pullup) 1.5 5

DL Gate Driver On-Resistance R

(

)

Low state (pulldown) 0.5 1.7

Ω

DH Gate Driver Source/Sink

Current

DH forced to 2.5V, V

BST

- V

forced to 5V 1 A

DL Gate Drive Sink Current I

DL forced to 5V 3 A

DL Gate Driver Source Current I

DL forced to 2.5V 1 A

DL rising 35

Dead-Time

DH rising 26

LOGIC AND I/O

Logic Input High Voltage V

D0−D4, SHDN, SKIP 2.4 V

Logic Input Low Voltage V

D0−D4, SHDN, SKIP 0.8 V

TON = V

(200kHz operation) V

- 0.4

TON = open (300kHz operation) 3.15 3.85

TON = REF (400kHz operation) 1.65 2.35

TON Input Levels

TON = GND (550kHz operation) 0.5

TON = GND or V

-3 3

Logic Input Current

SHDN, SKIP = GND or V

-1 1

µA

D0−D4 Pullup Current D0−D4 = GND 3 5 10 µA

SKIP No-Fault Mode Current

= +25°C -1.5 -0.1 mA

1 2 3 4 5 6 7 8 9 ... 32 33

MAX1716/MAX1854/MAX1855 1

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics MAX1855 Manual de usuario Pagina 4

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics MAX1855