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SC4510ITSTR Scheda tecnica(PDF) 3 Page - Semtech Corporation

Il numero della parte SC4510ITSTR
Spiegazioni elettronici  High Performance Synchronous Buck Controller With Reference Tracking
PDF  16 Pages
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Produttore elettronici  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4510ITSTR Scheda tecnica(HTML) 3 Page - Semtech Corporation

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© 2004 Semtech Corp.
www.semtech.com
SC4510
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Error Amplifier
Input Bias Current
0.4
0.7
µA
Input Offset Voltage
2.5
mV
Transconductance Gain
G
M
Output Source Mode
Output Sink Mode
275
375
µΩ−1
Unity Gain Bandwidth (1)
3
MHz
Output Sink/Source Current
V
COMP
= 2.5V
15
µA
Buffered Reference
Internal reference
V
REF
-40C to +85C
0.49
0.5
0.51
V
Line regulation
5V < AVCC < 15V
0.02
%/V
External reference input range
V
REFIN
0.3
3.0
V
Tracking accuracy
V
REFOUT
With respect to V
REFIN
(Greater of the two)
+ 0.5
+10.0
%
mV
Reference output current
I
REFOUT
5
mA
Oscillator and Synchronisation
Frequency range
Fosc
0.1
1
MHz
Frequency setting
Fosc
ROSC = 221K
270
300
330
KHz
Sync input High voltage
1.5
V
Sync input Low voltage
0.5
V
Duty Cycle
Maximum Duty Cycle
Fosc = 1 MHz
70
%
Fosc = 300 kHz
90
%
Minimum Duty Cycle
Fosc = 100 kHz
5
%
Minimum pulse width
Fosc = 0.1 to 1 MHz
250
nS
Current Limit
Current limit sense threshold
V
CSLIM
Output source mode
60
75
90
mV
Output sink mode
-85
-110
-130
mV
Delay to Output (1)
t
CSDLY
10 mV Overdrive
50
nS
Unless specified: T
A = TJ = -40°C to +85°C, AVCC/PVCC = 12V, Fosc = 300 kHz, SS/EN = 5V



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