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参数资料
| 型号： | LM2702MT-ADJ/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.6 A SWITCHING REGULATOR, 720 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | TSSOP-16 |
| 文件页数： | 19/21页 |
| 文件大小： | 1197K |
| 代理商： | LM2702MT-ADJ/NOPB |
Electrical Characteristics Gamma Buffer (Continued)
Specifications in standard type face are for T
J = 25C and those with boldface type apply over the full Operating Tempera-
ture Range (T
J = 40C to +125C). Unless otherwise specified, VIN =2.2V and AVIN = 8V, RCOM =RGAMMA =50
,C
COM =
C
GAMMA = 1nF.
Gamma Buffer
Symbol
Parameter
Conditions
Min
Typ
Max
Units
AV
IN
Supply Voltage
412
V
Is+
Supply Current (Amplifier +
Buffer)
Vo=AV
IN/2, No Load
2.2
4
mA
I
SC
Output Short Circuit Current
Source
50
66
75
mA
Sink
40
56
65
Electrical Characteristics PMOS Switch Logic Control
Specifications in standard type face are for T
J = 25C and those with boldface type apply over the full Operating Tempera-
ture Range (T
J = 40C to +125C). Unless otherwise specified, VIN =2.2V and AVIN = 8V, RCOM =RGAMMA =50
,C
COM =
C
GAMMA = 1nF.
PMOS Switch Logic Control
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
DELAY
Delay Current
4.7
5.7
6.4
A
R
DSON
PMOS Switch ON Resistance
7.3
20
I
SWO
PMOS Switch Current
Switch ON
20
mA
I
SWI
PMOS Switch Input Current
SWC = 0V, SWO Open, SWI
= 30V
32
A
SWC = 1.7V, SWO Open,
SWI = 30V
118
V
SWC
Switch ON
1.5
1.1
V
Switch OFF
1.1
0.7
Note 1: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,
and the ambient temperature, TA. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power dissipation
at any ambient temperature is calculated using: PD (MAX) = (TJ(MAX) TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
Note 2: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to
be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k
resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin.
Note 4: Vcom pin is rated for 1.5kV Human Body Model and 150V Machine Model.
Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%
production tested or guaranteed through statistical analysis. 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).
Note 6: Typical numbers are at 25C and represent the most likely norm.
Note 7: Duty cycle affects current limit due to ramp generator. Current limit is at 0% duty cycle and will decrease with higher duty cycles. See Typical Performance
Characteristics for a graph of Power Switch Current Limit vs. VIN and Power Switch Current Limit vs. Temp.
Note 8: See the graph titled "RDSON vs. VIN" for a more accurate value of the power switch RDSON.
Note 9: Bias current flows into FB pin.
Note 10: Refer to the graphs titled "Input Offset Voltage vs. Common Mode Voltage".
LM2702
www.national.com
7
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