參數(shù)資料
型號： LM2734YMK
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： Thin SOT23 1A Load Step-Down DC-DC Regulator
中文描述： 2.5 A SWITCHING REGULATOR, 660 kHz SWITCHING FREQ-MAX, PDSO6
封裝： TSOT-23, 6 PIN
文件頁數(shù)： 3/22頁
文件大小： 459K
代理商： LM2734YMK
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
SW Voltage
Boost Voltage
Boost to SW Voltage
FB Voltage
EN Voltage
Junction Temperature
ESD Susceptibility (Note 2)
Storage Temp. Range
-0.5V to 24V
-0.5V to 24V
-0.5V to 30V
-0.5V to 6.0V
-0.5V to 3.0V
-0.5V to (V
IN
+ 0.3V)
150C
2kV
-65C to 150C
Soldering Information
Infrared/Convection Reflow (15sec)
Wave Soldering Lead Temp. (10sec)
220C
260C
Operating Ratings
(Note 1)
V
IN
SW Voltage
Boost Voltage
Boost to SW Voltage
Junction Temperature Range
Thermal Resistance
θ
JA
(Note 3)
3V to 20V
-0.5V to 20V
-0.5V to 25V
1.6V to 5.5V
40C to +125C
118C/W
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25C, and those in
boldface type
apply over the full
Operating Tempera-
ture Range
(T
J
= -40C to 125C). V
IN
= 5V, V
BOOST
- V
SW
= 5V unless otherwise specified. Datasheet min/max specification
limits are guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
(Note 4)
0.784
Typ
(Note 5)
0.800
Max
(Note 4)
0.816
Units
V
FB
Feedback Voltage
Feedback Voltage Line
Regulation
Feedback Input Bias Current
Undervoltage Lockout
Undervoltage Lockout
UVLO Hysteresis
V
V
FB
/
V
IN
V
IN
= 3V to 20V
0.01
% / V
I
FB
Sink/Source
V
IN
Rising
V
IN
Falling
10
2.74
2.3
0.44
1.6
0.55
92
96
2
1
300
1.7
1.5
30
2.5
1.0
250
2.90
nA
UVLO
V
2.0
0.30
1.2
0.40
85
90
0.62
1.9
0.66
F
SW
Switching Frequency
LM2734X
LM2734Y
LM2734X
LM2734Y
LM2734X
LM2734Y
V
BOOST
- V
SW
= 3V
V
BOOST
- V
SW
= 3V
Switching
V
EN
= 0V
LM2734X (50% Duty Cycle)
LM2734Y (50% Duty Cycle)
V
EN
Falling
V
EN
Rising
Sink/Source
MHz
D
MAX
Maximum Duty Cycle
%
D
MIN
Minimum Duty Cycle
%
R
DS(ON)
I
CL
I
Q
Switch ON Resistance
Switch Current Limit
Quiescent Current
Quiescent Current (shutdown)
600
2.5
2.5
m
A
mA
nA
1.2
I
BOOST
Boost Pin Current
3.5
1.8
0.4
mA
V
EN_TH
Shutdown Threshold Voltage
Enable Threshold Voltage
Enable Pin Current
Switch Leakage
V
1.8
I
EN
I
SW
10
40
nA
nA
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see Electrical Characteristics.
Note 2:
Human body model, 1.5k
in series with 100pF.
Note 3:
Thermal shutdown will occur if the junction temperature exceeds 165C. The maximum power dissipation is a function of T
,
θ
and T
. The
maximum allowable power dissipation at any ambient temperature is P
= (T
– T
)/
θ
. All numbers apply for packages soldered directly onto a 3” x 3” PC
board with 2oz. copper on 4 layers in still air. For a 2 layer board using 1 oz. copper in still air,
θ
JA
= 204C/W.
Note 4:
Guaranteed to National’s Average Outgoing Quality Level (AOQL).
Note 5:
Typicals represent the most likely parametric norm.
L
www.national.com
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2734YMK/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A LOAD STEP-DOWN DC-DC REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2734YMKX 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2734YMKX/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2734YQMK 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 550KHZ, 6TSOT 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 550KHZ, 6TSOT; Primary Input Voltage:20V; No. of Outputs:1; Output Voltage:18V; Output Current:1A; Voltage Regulator Case Style:SOT-23; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes
LM2734YQMK/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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