參數(shù)資料
型號： LM26480QSQ-CF/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 2.4 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, QCC24
封裝： 4 X 4 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, LLP-24
文件頁數(shù)： 27/30頁
文件大?。?/td> 2455K
代理商： LM26480QSQ-CF/NOPB
Symbol
Parameter
Conditions
Min
Typ
Max
Units
C
OUT
Output Capacitor
Capacitance for stability
0°C
≤ T
J ≤ 125°C
0.33
0.47
F
40°C
≤ T
J ≤ 125°C
0.68
1.0
F
ESR (Equivalent Series
Resistance)
5
500
m
Buck Converters SW1, SW2
Unless otherwise noted, V
IN = 3.6V, CIN = 10 F, COUT = 10 F, LOUT = 2.2 H. 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
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
A
f
OSC
Internal Oscillator Frequency
Default oscillator frequency = 2.0
MHz
1.6
2.0
2.4
MHz
Default oscillator frequency = 2.1
MHz
1.7
2.1
2.5
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
A
No load PWM Mode (Forced PWM)
2
mA
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
sec
C
IN
Input Capacitor
Capacitance for stability
10
F
C
O
Output Capacitor
Capacitance for stability
10
F
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
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 mS
60
mS
Default = 100 S
100
S
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 A
0.23
0.5
V
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LM26480
相關(guān)PDF資料
PDF描述
LM26480SQ-BF/NOPB 2.4 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, QCC24
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