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LM2651MTC-3.3 데이터시트(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM2651MTC-3.3
상세설명  1.5A High Efficiency Synchronous Switching Regulator
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2651MTC-3.3 데이터시트(HTML) 5 Page - National Semiconductor (TI)

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All Output Voltage Versions (Continued)
Specifications in standard type face are for T
J = 25˚C and those with boldface type apply over full operating junction tem-
perature range. V
IN =10V unless otherwise specified.
Symbol
Parameter
Conditions
Typical
Limit
Units
V
EAL
Error Amplifier Output Swing
Lower Limit
1.25
1.35/1.50
V
V(max)
V
D
Body Diode Voltage
I
DIODE = 1.5A
1
V
f
OSC
Oscillator Frequency
V
IN = 4V
300
280/255
330/345
kHz
kHz(min)
kHz(max)
D
MAX
Maximum Duty Cycle
V
IN =4V
95
92
%
%(min)
I
SS
Soft-Start Current
Voltage at the SS pin = 1.4V
11
7
14
µA
µA(min)
µA(max)
I
SHUTDOWN
Shutdown Pin Current
Shutdown Pin Pulled Low
2.2
0.8/0.5
3.7/4.0
µA
µA(min)
µA(max)
v
SHUTDOWN
Shutdown Pin Threshold
Voltage
Falling Edge
0.6
0.3
0.9
V
V(min)
V(max)
T
SD
Thermal Shutdown
Temperature
165
˚C
T
SD_HYST
Thermal Shutdown Hysteresis
Temperature
25
˚C
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 device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see
the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is calculated by using PDmax =(TJmax −TA)/θJA , where TJmax is the maximum junction temperature, TA is the
ambient temperature, and
θJA is the junction-to-ambient thermal resistance of the specified package. The 893 mW rating results from using 150˚C, 25˚C, and
140˚C/W for TJmax,TA, and θJA respectively. A θJA of 140˚C/W represents the worst-case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking
allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 7.14mW per ˚C above 25˚C ambient. The LM2651 actively
limits its junction temperature to about 165˚C.
Note 3: The human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin.
Note 4: Typical numbers are at 25˚C and represent the most likely norm.
Note 5: All limits are guaranteed at room temperature (standard typeface) and at temperature extremes (boldface type ). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
www.national.com
5


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