Rainbow-electronics MAX16904 Uživatelský manuál stáhnout pdf (Strana 4)

MAX16904

2.1MHz, High-Voltage,

600mA Mini-Buck Converter

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

SUP

= +14V, T

= T

= -40°C to +125°C, unless otherwise noted. Typical values are at T

= +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SKIP-Mode Peak Current I

SKIP

350 mA

High-Side DMOS RDS

ON,HS

BIAS

= 5V 400 800 m

Low-Side DMOS RDS

ON,LS

250 450 m

DMOS Peak Current-Limit

Threshold

MAX

850 1500 1725 mA

Soft-Start Ramp Time t

7 8 9 ms

LX Rise Time t

RISE,LX

5 ns

Minimum On-Time t

80 ns

PWM Switching Frequency f

Internally generated 1.925 2.1 2.275 MHz

SYNC Input Frequency Range f

SYNC

1.8 2.6 MHz

Spread-Spectrum Range SS Spread-spectrum option only +6 %

PGOOD

THR,PGD

OUT

rising 93

PGOOD Threshold

THF,PGD

OUT

falling 88 91 94

PGOOD Debounce t

DEB

10 μs

PGOOD High Leakage Current I

LEAK,PGD

= +25°C 1 μA

PGOOD Output Low Level V

OUT,PGD

Sinking 1mA 0.4 V

LOGIC LEV ELS

IH,EN

2.4

EN Level

IL,EN

0.6

EN Input Current I

IN,EN

= V

SUP

= +42V, T

= +25°C 1 μA

IH,SYNC

1.4

SYNC Switching Threshold

IL,SYNC

0.4

SYNC Internal Pulldown R

PD,SYNC

200 k

THERMAL PROTECTION

Thermal Shutdown T

SHDN

175 °C

Thermal Shutdown Hysteresis T

SHDN,HYS

15 °C

Note 2: When the typical minimum on-time of 80ns is violated, the device skips pulses.

Note 3: Not production tested. Guaranteed by design.

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