LM2651MTC-1.8 National Semiconductor, LM2651MTC-1.8 Datasheet - Page 5

• Manufacturer Part Number: LM2651MTC-1.8
• Description: 1.5A High Efficiency Synchronous Switching Regulator
• Manufacturer: National Semiconductor

I
I
V
V
V
f
D
I
I
v
T
T
EA_SOURCE
EA_SINK
OSC
SS
SHUTDOWN
SHUTDOWN
Specifications in standard type face are for T
perature range. V
EAH
EAL
D
SD
SD_HYST
MAX
All Output Voltage Versions
Symbol
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is in-
tended 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 P
ambient temperature, and
140˚C/W for T
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
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).
Jmax
Error Amplifier Source
Current
Error Amplifier Sink Current
Error Amplifier Output Swing
Upper Limit
Error Amplifier Output Swing
Lower Limit
Body Diode Voltage
Oscillator Frequency
Maximum Duty Cycle
Soft-Start Current
Shutdown Pin Current
Shutdown Pin Threshold
Voltage
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis Temperature
, T
A
, and
IN
= 10V unless otherwise specified.
Parameter
JA
JA
is the junction-to-ambient thermal resistance of the specified package. The 893 mW rating results from using 150˚C, 25˚C, and
respectively. A
JA
of 140˚C/W represents the worst-case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking
J
I
V
V
Voltage at the SS pin = 1.4V
Shutdown Pin Pulled Low
Falling Edge
DIODE
= 25˚C and those with boldface type apply over full operating junction tem-
IN
IN
(Continued)
= 4V
= 4V
= 1.5A
Conditions
Dmax
5
= (T
resistor into each pin.
Jmax
− T
A
)/
JA
, where T
Typical
2.70
1.25
300
165
Jmax
2.2
0.6
40
65
95
11
25
1
is the maximum junction temperature, T
2.50/2.40
1.35/1.50
280/255
330/345
0.8/0.5
3.7/4.0
Limit
25/15
0.3
0.9
30
92
14
7
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kHz(max)
kHz(min)
µA(max)
µA(max)
µA(min)
µA(min)
µA(min)
µA(min)
V(max)
V(max)
%(min)
V(min)
V(min)
Units
kHz
µA
µA
µA
µA
˚C
˚C
%
V
V
V
V
A
is the