參數(shù)資料
型號： LM5021MMX-1
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： AC-DC Current Mode PWM Controller
中文描述： 0.7 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO8
封裝： MSOP-8
文件頁數(shù)： 4/15頁
文件大?。?/td> 746K
代理商： LM5021MMX-1
Electrical Characteristics
Specifications in standard type face are for T
J
= +25C and those in
boldface type
apply over the full
Operating Junction Temperature Range
. Unless otherwise specified: V
IN
= 15V, R
T
= 44.2K
. (Note
3) (Continued)
Symbol
PWM COMPARATOR
Parameter
Conditions
Min
Typ
Max
Unit
COMP to OUT delay
COMP set to 2V
CS stepped 0 to
0.4V, time to OUT
transition low, C
load
= 0.
COMP = 0V
20
ns
Min Duty Cycle
Max Duty Cycle (-1 Device)
Max Duty Cycle (-2 Device)
COMP to PWM comparator gain
COMP Open Circuit Voltage
COMP at Max Duty Cycle
COMP Short Circuit Current
SLOPE COMPENSATION
Slope Comp Amplitude
(LM5021-1 only)
0
85
%
%
%
75
80
50
0.33
5.1
2.75
1.1
4.2
6
V
V
COMP = 0V
0.6
1.5
mA
CS pin to PWM
Comparator offset at
maximum duty cycle
70
90
110
mV
OUTPUT SECTION
OUT High Saturation
IOUT = 50mA, VCC
- OUT
IOUT = 100mA
OUT = VCC/2.
OUT = VCC/2.
C
load
= 1nF
C
load
= 1nF
0.6
1.1
V
OUT Low Saturation
Peak Source Current
Peak Sink Current
Rise time
Fall time
0.3
0.3
0.7
25
10
1
V
A
A
ns
ns
HICCUP MODE
V
OVLD
V
HIC
V
RST
I
DTCS
I
OVCS
Over load detection threshold
Hiccup mode threshold
Hiccup mode Restart threshold
Dead-time current source
Overload detection timer current
source
THERMAL RESISTANCE
θ
JA
MSOP-8 Junction to Ambient
θ
JA
MDIP-8 Junction to Ambient
COMP pin
SS pin
SS pin
V
SS-OCV
– 0.8
V
SS-OCV
– 0.8
0.1
0.1
6
V
SS-OCV
– 0.6
V
SS-OCV
– 0.4
V
SS-OCV
– 0.6
V
SS-OCV
– 0.4
0.3
0.25
10
V
V
V
μA
μA
0.5
0.4
14
0 LFM
0 LFM
200
107
C/W
C/W
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The human body model is a 100 pF capacitor discharged through a 1.5k
resistor into each pin.
Note 3:
Min and Max limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 4:
Device thermal limitations may limit usable range.
Note 5:
After initial turn-on at VIN = 20V.
L
www.national.com
4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM5021MMX-1/NOPB 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5021MMX-2 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5021MMX-2/NOPB 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5021NA-1 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5021NA-1/NOPB 功能描述:電流型 PWM 控制器 AC-DC Current Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
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