參數(shù)資料
型號: LM2736
廠商: National Semiconductor Corporation
英文描述: Thin SOT23 750mA Load Step-Down DC-DC Regulator
中文描述: 薄型SOT23負(fù)載電流降壓型DC - DC穩(wěn)壓器
文件頁數(shù): 3/22頁
文件大?。?/td> 444K
代理商: LM2736
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 22V
-0.5V to 22V
-0.5V to 28V
-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 18V
-0.5V to 18V
-0.5V to 23V
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)
1.225
Typ
(Note 5)
1.250
Max
(Note 4)
1.275
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 18V
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
350
1.5
1.5
30
2.2
0.9
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
LM2736X
LM2736Y
LM2736X
LM2736Y
LM2736X
LM2736Y
V
BOOST
- V
SW
= 3V
V
BOOST
- V
SW
= 3V
Switching
V
EN
= 0V
LM2736X (50% Duty Cycle)
LM2736Y (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)
650
2.3
2.5
m
A
mA
nA
1.0
I
BOOST
Boost Pin Current
3.3
1.6
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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