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FDS6898A датащи(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали FDS6898A
подробное описание детали  Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

FDS6898A датащи(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
V
CC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ= 25˚C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design,
test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
GATE DRIVE
I
Q-BOOT
BOOT Pin Quiescent Current
V
BOOT = 12V, VSD =0
18
90
µA
R
HG_UP
High-Side MOSFET Driver
Pull-Up ON resistance
V
BOOT =5V @ 350 mA Sourcing
2.7
R
HG_DN
High-Side MOSFET Driver
Pull-Down ON resistance
350 mA Sinking
0.8
R
LG_UP
Low-Side MOSFET Driver Pull-Up
ON resistance
V
BOOT =5V @ 350 mA Sourcing
2.7
R
LG_DN
Low-Side MOSFET Driver
Pull-Down ON resistance
350 mA Sinking
0.8
OSCILLATOR
f
SW
PWM Frequency
R
FADJ = 750 k
50
kHz
R
FADJ = 100 k
300
R
FADJ = 42.2 k
475
600
725
R
FADJ = 18.7 k
1000
External Synchronizing Signal
Frequency
Voltage Swing = 0V to V
CC
250
1000
SYNC
L
Synchronization Signal Low
Threshold
f
SW = 250 kHz to 1 MHz
1
V
SYNC
H
Synchronization Signal High
Threshold
f
SW = 250 kHz to 1 MHz
2
V
D
MAX
Max High-Side Duty Cycle
f
SW = 300 kHz
f
SW = 600 kHz
f
SW = 1 MHz
86
78
67
%
LOGIC INPUTS AND OUTPUTS
V
STBY-IH
Standby High Trip Point
V
FB = 0.575V, VBOOT = 3.3V
V
SD Rising
1.1
V
V
STBY-IL
Standby Low Trip Point
V
FB = 0.575V, VBOOT = 3.3V
V
SD Falling
0.232
V
V
SD-IH
SD Pin Logic High Trip Point
V
SD Rising
1.3
V
V
SD-IL
SD Pin Logic Low Trip Point
V
SD Falling
0.8
V
V
PWGD-TH-LO
PWGD Pin Trip Points
V
FB Falling
0.408
0.434
0.457
V
V
PWGD-TH-HI
PWGD Pin Trip Points
V
FB Rising
0.677
0.710
0.742
V
V
PWGD-HYS
PWGD Hysteresis
V
FB Falling
V
FB Rising
60
90
mV
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device
operates correctly. Operating Ratings do not imply guaranteed performance limits.
Note 2: The power MOSFETs can run on a separate 1V to 14V rail (Input voltage, VIN). Practical lower limit of VIN depends on selection of the external MOSFET.
See the MOSFET GATE DRIVERS section under Application Information for further details.
Note 3: ESD using the human body model which is a 100pF capacitor discharged through a 1.5 k
Ω resistor into each pin.
www.national.com
4


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