參數(shù)資料
型號(hào)： LM2635M/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO20
封裝： PLASTIC, SOP-20
文件頁數(shù)： 8/13頁
文件大小： 734K
代理商： LM2635M/NOPB
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(All voltages are referenced to the PGND and SGND
pins.)
V
CC
7V
BOOTV
15V
Junction Temperature
150C
DC Power Dissipation (Note 2)
1.42W
Storage Temperature
65C to +150C
Soldering Time, Temperature
Wave (4 seconds)
Infrared (10 seconds)
Vapor Phase (75 seconds)
260C
240C
219C
ESD Susceptibility (Note 3)
2 kV
Recommended Operating
Conditions (Note 1)
Supply Voltage Range (V
CC)
4.5V to 5.5V
Junction Temperature Range
0C to +125C
Electrical Characteristics
V
CC = 5V unless otherwise indicated under the Conditions column. Typicals and limits appearing in plain type apply for TA =
T
J = +25C. Limits appearing in boldface type apply over 0C to +70C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
BOOTV
FET Driver Supply
Voltage
15
V
DACOUT
5-Bit DAC Output
Voltage
VID4:0=00101
1.773
1.809
1.845
V
VID4:0=00001
1.969
2.009
2.049
VID4:0=11101
2.165
2.209
2.253
VID4:0=10111
2.753
2.809
2.865
V
OUT
DC Load Regulation
I
OUT=0 to 14A Figure 2
5
mV
DC Line Regulation
V
IN=4.75V to 5.25V Figure 2
1
G
EA
Error Amplifier DC Gain
85
dB
SR
EA
Error Amplifier Slew
Rate
6
V/s
BW
EA
Error Amplifier Unity
Gain Bandwidth
5
MHz
I
Q_VCC
Operating V
CC Current
OUTEN=V
CC=5V, VID=10111
1.5
2.5
4
mA
Shutdown V
CC Current
OUTEN Floating, VID0:4 Floating
1
1.5
3
I
Q_BOOTV
BOOTV Pin Quiescent
Current
BOOTV=12V, OUTEN=0, VID0:4
Floating
4A
D
MAX
Maximum Duty Cycle
90
%
D
MIN
Minimum Duty Cycle
0
%
R
SENSE
SENSE Pin Resistance
to Ground
7
11.5
16
k
R
DS_SRC
FET Driver Drain-Source
ON Resistance when
Sourcing Current
BOOTV=5V
7
R
DS_SINK
FET Driver Drain-Source
ON Resistance when
Sinking Current
(Independent of BOOTV Voltage)
1.7
f
OSC
Oscillator Frequency
R
FA =84k
250
300
350
kHz
R
FA =22k
1000
R
FA = 10.5 k
2000
I
MAX
IMAX Pin Sink Current
V
IMAX = 5V, VIFB = 6V, VCC =5V
130
180
230
A
V
OUTEN_IH
OUTEN Pin Input Logic
Low to Logic High Trip
Point
OUTEN Voltage
↑
3.5
3.0
V
OUTEN_IL
OUTEN Pin Input Logic
High to Logic Low Trip
Point
OUTEN Voltage
↓
1.8
1.5
V
LM2635
www.national.com
4
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