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LM2640 Arkusz danych(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Numer części LM2640
Szczegółowy opis  Dual Adjustable Step-Down Switching Power Supply Controller
Download  18 Pages
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2640 Arkusz danych(HTML) 5 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Notes 2, 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
IN, SW1, and SW2
−0.3 to 31V
FB1 and FB2
−0.3 to 3V
SD, ON/OFF1, ON/OFF2,
2NDFB/FPWM, SYNC, REF,
SS1, SS2, COMP1,
COMP2 and CSL1
−0.3 to (V
LIN +0.3)V
LIN
−0.3 to 6V
CSH1, CSH2, and CSL2
−0.3 to 7V
Voltage from CBOOT1 to SW1
and from CBOOT2 to SW2
−0.3 to 5V
Voltage from HDRV1 to SW1
and from HDRV2 to SW2
−0.3V
Voltage from CBOOT1 to
HDRV1 and from CBOOT2
HDRV2
−0.3V
Junction Temp.
+150˚C
Power Dissipation (Note 3)
883 mW
Ambient Storage Temp. (T
J)
−65 to +150˚C
Soldering Dwell Time, Temp. (Note 4)
Wave
4 sec, 260˚C
Infrared
10 sec, 240˚C
Vapor Phase
75 sec, 219˚C
ESD Rating (Note 5)
2 kV
Operating Ratings (Notes 1, 2)
V
IN
5.5 to 30V
Junction Temp. (T
J)
0 to +125˚C
Electrical Characteristics
Typicals and limits appearing in regular type apply for T
J = 25˚C. Limits appearing in boldface type apply over the entire junc-
tion temperature range for operation, 0 to +125˚C. Unless otherwise specified under the Parameter or Conditions columns, V
IN
= 10V, and V
SD =VON/OFF1 =VON/OFF2 = 5V. (Note 2), (Note 6) and (Note 7)
Symbol
Parameter
Conditions
Typical
Limit
Units
System
V
IN
Input Supply Voltage Range
5.5
V(min)
30
V(max)
V
OUT
Output Voltage Adjustment
Range
2.2
V(min)
6.0
V(max)
∆V
OUT/VOUT
Load Regulation
0 mV
≤ (CSH1-CSL1) ≤ 80 mV,
0mV
≤ (CSH2-CSL2) ≤ 80 mV
0.5
%
∆V
OUT/∆VIN
Line Regulation
5.5V
≤ V
IN ≤ 30V
0.002
%/V
I
IN
Input Supply Current
ON (Note 8)
0.6
mA
V
FB1 =VFB2 = 1.4V,
1
mA(max)
V
CSH1 = 5.2V, VCSL1 = 5V,
V
CSH2 = 3.5V, VCSL2 = 3.3V
Standing By (Note 9)
80
µA
V
ON/OFF1 =VON/OFF2 =0V
150
µA(max)
Shut Down (Note 10)
25
µA
V
SD =0V
60
µA(max)
I
SS1,ISS2
Soft-Start Source Current
V
SS1 =VSS2 = 1V
4.75
µA
2.0
µA(min)
7.0
µA(max)
Soft-Start Sink Current
10
µA
V
PCL
Positive Current Limit Voltage
(Voltage from CSH1 to CSL1
and from CSH2 to CSL2)
100
mV
80
mV(min)
140
mV(max)
−40˚C
≤ T
J ≤ +125˚C
100
75
mV(min)
V
NCL
Negative Current Limit Voltage
(Voltage from CSH1 to CSL1
and from CSH2 to CSL2)
V
2NDFB/FPWM = 0.8V
−100
mV
−80
mV(min)
−140
mV(max)
www.national.com
5


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