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SC251 датащи(PDF) 3 Page - Semtech Corporation

номер детали SC251
подробное описание детали  Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
PDF  19 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC251 датащи(HTML) 3 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC251
POWER MANAGEMENT
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Shutdown Current
I
SD
EN = GND
0.1
3
μA
P-Channel Current Limit
I
LIM(P)
0.9
1.3
1.7
A
V
DAC Pass-through
Mode Threshold
V
DAC PASS
V
DAC rising
1.24
1.28
1.32
V
V
DAC falling
1.2
1.245
V
DAC Pass-through
Mode Hysteresis
V
DAC HYST
40
mV
V
REF Output
V
REF
I
REF = 10mA
2.75
2.85
2.95
V
V
REF LDO Dropout
V
REF DO
I
REF = 10mA
100
mV
V
REF Load Current
I
REF
10
mA
V
REF Load Regulation
V
REF LDREG
I
REF = 0.1mA to 10mA
0.05
%/mA
V
REF Line Regulation
V
REF LNREG
I
REF = 1 mA
0.3
%/V
GD Load Capacitance
C
GD
10
nF
GD Source Current
I
GDH
T
A = 25°C
0.5
2mA
GD Sink Current
I
GDL
V
DAC = 1.4V, TA = 25°C
75
150
mA
R
DSon of P-Channel FET
R
PFET
V
IN = 3V, IOUT = 100mA
0.4
Ω
R
DSon of N-Channel FET
R
NFET
V
IN = 3V, IOUT = 100mA
0.25
Ω
R
DSon of Bypass
P-Channel FET
R
PASS
I
OUT = 600mA, VIN = 3V, VDAC = 1.4V
0.2
Ω
LX Pin PMOS Leakage
I
LLXP
EN=GND, V
IN = 3.6V, LX = GND
0.1
μA
VOUT Pin Bypass
FET Leakage
I
LVOUT
EN=GND, V
IN = 3.6V, VOUT = GND
0.1
3
μA
Oscillator Frequency
f
OSC
V
DAC > 0.95V
0.85
1
1.15
MHz
V
DAC < 0.95V
0.65
1.15
Logic Input High
V
IH
EN / VMODE increasing
1.6
V
Logic Input Low
V
IL
EN / VMODE decreasing
0.6
V
Logic Input Current High
I
IH
EN / VMODE = 5.0V
±2
μA
Logic Input Current Low
I
IL
EN / VMODE = 0V
±2
μA
Enable Transient Over/
Undershoot (1)
OS
EN
20
%
Electrical Characteristics (Cont.)



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