參數(shù)資料
型號： LM1771UMM
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
中文描述： SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, DSO8
封裝： MSOP-8
文件頁數(shù)： 3/17頁
文件大小： 772K
代理商： LM1771UMM
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN
EN, FB, HG, LG
Storage Temperature Range
-0.3V to 6V
-0.3V to V
IN
65C to 150C
Junction Temperature
Lead Temperature
ESD Rating
150C
260C
2kV
(soldering, 10sec)
Operating Ratings
V
IN
to GND
Junction Temperature Range (T
J
)
2.8V to 5.5V
40C to +125C
Electrical Characteristics
type
apply over the full Junction Temperature Range (40C to +125C). Minimum and Maximum limits are guaranteed
through test, design or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C and are
provided for reference purposes only. Unless otherwise specified V
IN
= 3.3V.
Specifications with standard typeface are for T
J
= 25C, and those in
bold face
Symbol
V
FB
I
Q
Parameter
Conditions
Min
0.782
Typ
0.8
400
0.5
1.0
2.0
150
135
120
70
1.2
50
50
2.65
50
0.55
Max
0.818
700
0.6
1.2
2.4
250
225
220
Unit
V
μA
Feedback pin voltage
Quiescent current
V
FB
= 0.9V
LM1771S - (500ns)
LM1771T - (1000ns)
LM1771U - (2000ns)
LM1771S - (500ns)
LM1771T - (1000ns)
LM1771U - (2000ns)
T
ON
Switch On-Time
0.4
0.8
1.6
μs
T
OFF_MIN
Minimum Off-Time
ns
T
D
Gate Drive Dead-Time
EN Pin Rising Threshold
EN Pin Hysteresis
Feedback pin bias current
Under-voltage lock out
Under-voltage lock out hysteresis
Feedback pin Short Circuit Latch
Threshold
HG FET driver pull-up On resistance
HG FET driver pull-down On resistance I
HG
= 20 mA
LG FET driver pull-up On resistance
LG FET driver pull-down On resistance
ns
V
mV
nA
V
mV
V
V
IH_EN
V
EN_HYS
I
FB
V
UVLO
V
UVLO_HYS
V
SC_TH
1.15
1.25
200
V
FB
= 0.9V
V
IN
Rising Edge
2.8
0.42
0.65
R
DS(ON) 1
R
DS(ON) 2
R
DS(ON) 3
R
DS(ON) 4
I
HG
= 20 mA
4
6
4
6
I
LG
= 20 mA
I
LG
= 20 mA
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics.
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM1771UMM/NOPB 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
LM1771UMMX 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
LM1771UMMX/NOPB 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
LM1771USD 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
LM1771USD/NOPB 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
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