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LM26480SQX-AA Folha de dados(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM26480SQX-AA
Descrição Electrónicos  Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM26480SQX-AA Folha de dados(HTML) 6 Page - National Semiconductor (TI)

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Symbol
Parameter
Conditions
Min
Typ
Max
Units
C
OUT
Output Capacitor
Capacitance for stability
0°C
T
J 125°C
0.33
0.47
µF
−40°C
T
J 125°C
0.68
1.0
µF
ESR (Equivalent Series
Resistance)
5
500
m
Buck Converters SW1, SW2
Unless otherwise noted, V
IN = 3.6V, CIN = 10 µF, COUT = 10 µF, LOUT = 2.2 µH. Typical values and limits appearing in normal type
apply for T
J = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to
+125°C. ((Note 2, Note 7, Note 8, Note 9, Note 11, Note 14)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
FB (Note 14)
Feedback Voltage
−3
+3
%
V
OUT
Line Regulation
2.8 < V
IN < 5.5
I
O =10 mA
0.089
%/V
Load Regulation
100 mA < I
O < IMAX
0.0013
%/mA
Eff
Efficiency
Load Current = 250 mA
96
%
I
SHDN
Shutdown Supply Current
EN is de-asserted
0.01
1
µA
f
OSC
Internal Oscillator Frequency
2.0
2.4
MHz
I
PEAK
Buck1 Peak Switching Current Limit
2.0
2.4
A
Buck2 Peak Switching Current Limit
2.0
2.4
I
Q
Quiescent Current “On”
No load PFM Mode
33
µA
R
DSON (P)
Pin-Pin Resistance PFET
200
400
m
R
DSON (N)
Pin-Pin Resistance NFET
180
400
m
T
ON
Turn On Time
Start up from shut-down
500
µsec
C
IN
Input Capacitor
Capacitance for stability
10
µF
C
O
Output Capacitor
Capacitance for stability
10
µF
I/O Electrical Characteristics
Unless otherwise noted: Typical values and limits appearing in normal type apply for T
J = 25°C. Limits appearing in boldface
type apply over the entire junction temperature range for operation, T
J = 0°C to +125°C.
Symbol
Parameter
Conditions
Limit
Units
Min
Max
V
IL
Input Low Level
0.4
V
V
IH
Input High Level
0.7*VDD
V
Power On Reset Threshold/Function (POR)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
nPOR
nPOR = Power on reset for Buck1 and
Buck2
Default
60
msec
nPOR
Threshold
Percentage of Target voltage Buck1 or
Buck2
V
BUCK1 AND VBUCK2 rising
92
%
V
BUCK1 OR VBUCK2 falling
82
V
OL
Output Level Low
Load = I
OL = 500 µA
0.23
0.5
V
www.national.com
6


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