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參數(shù)資料
| 型號： | RLF7030T-1R0N64 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages |
| 中文描述： | N溝道場效應(yīng)管同步降壓穩(wěn)壓控制器輸出電壓低 |
| 文件頁數(shù)： | 4/22頁 |
| 文件大小： | 602K |
| 代理商： | RLF7030T-1R0N64 |
Electrical Characteristics
(Continued)
V
= 5V unless otherwise indicated. Typicals and limits appearing in plain type apply for T
=T
=+25C. 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
GATE DRIVE
I
Q-BOOT
Parameter
Conditions
Min
Typ
Max
Units
BOOT Pin Quiescent Current
BOOTV = 12V, EN = 0
0C to +125C
-40C to +125C
95
95
160
215
μA
R
DS1
Top FET Driver Pull-Up ON
resistance
Top FET Driver Pull-Down ON
resistance
Bottom FET Driver Pull-Up ON
resistance
Bottom FET Driver Pull-Down
ON resistance
BOOT-SW = 5V
@
350mA
3
R
DS2
BOOT-SW = 5V
@
350mA
2
R
DS3
BOOT-SW = 5V
@
350mA
3
R
DS4
BOOT-SW = 5V
@
350mA
2
OSCILLATOR
f
OSC
PWM Frequency
R
FADJ
= 590k
R
FADJ
= 88.7k
R
FADJ
= 42.2k
, 0C to +125C
R
FADJ
= 42.2k
, -40C to +125C
R
FADJ
= 17.4k
R
FADJ
= 11.3k
f
PWM
= 300kHz
f
PWM
= 600kHz
50
300
600
600
1400
2000
90
88
kHz
500
490
700
700
D
Max Duty Cycle
%
LOGIC INPUTS AND OUTPUTS
V
SD-IH
SD Pin Logic High Trip Point
V
SD-IL
SD Pin Logic Low Trip Point
2.6
1.6
1.6
3.5
V
0C to +125C
-40C to +125C
FB Voltage Going Down
0C to +125C
-40C to +125C
FB Voltage Going Up
0C to +125C
-40C to +125C
1.3
1.25
V
V
PWGD-TH-LO
PWGD Pin Trip Points
0.413
0.410
0.430
0.430
0.446
0.446
V
V
PWGD-TH-HI
PWGD Pin Trip Points
0.691
0.688
0.710
0.710
35
110
0.734
0.734
V
V
PWGD-HYS
PWGD Hysteresis (LM2737 only) FB Voltage Going Down FB Voltage
Going Up
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.
Opearting Ratings
do not imply guaranteed performance limits.
Note 2:
The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
L
www.national.com
4
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