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SC250 датащи(PDF) 3 Page - Semtech Corporation

номер детали SC250
подробное описание детали  Step-Down DC-DC Converter with Bias LDO for RF Power Amplifi ers
PDF  18 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC250 датащи(HTML) 3 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC250
PRELIMINARY
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Quiescent Current
I
Q
Normal Mode (V
DAC < 1V)
1.5
mA
Bypass Mode (V
DAC > 1.4V)
1
Shutdown Current
I
SD
LX = open, EN = GND, V
OUT = open,
T
A= 25°C
0.1
1
μA
VDAC Regulated Output
Mode
V
DAC
V
IN = 4.2V
0.10
1.20
V
VDAC Pass-Through
Mode Threshold
V
DAC PT
V
DAC Rising
1.28
1.37
V
V
DAC Falling
1.20
1.3
VDAC to VOUT Transfer
Ratio
G
V
3
V/V
R
DS ON of Bypass
P-Channel FET
R
PASS
I
OUT = 100mA, VIN = 3V, VDAC= 1.4V
75
mΩ
R
DS ON of P-Channel
Switching FET
R
DSP
I
OUT = 100mA, VIN = 3V
400
mΩ
R
DS ON of N-Channel
Switching FET
R
DSN
I
OUT = 100mA, VIN = 3V
250
mΩ
LX Leakage Current PMOS
I
LXP
V
IN = 3.6V, LX = 0V, EN = GND
2
μA
LX Leakage Current NMOS
I
LXN
V
IN = 3.6V, LX = 3.6V, EN = GND
2
μA
VOUT Pin Bypass
PMOS Leakage
I
LVOUT
V
IN = 3.6V, VOUT = 0V, EN = GND
2
μA
Oscillator Frequency
(Fixed Frequency)
f
OSC
V
DAC > 0.2V
0.85
1
1.15
MHz
Oscillator Frequency
(Variable Frequency)
f
OSCV
V
DAC = 0.1V
0.65
MHz
Logic Input High
V
IH
1.6
V
Logic Input Low
V
IL
0.6
V
Control Input Current - High
I
IH
VDAC/EN =3.6V
±2
μA
Control Input Current - Low
I
IL
VDAC/EN = GND
±2
μA
Enable Transient
Over/Undershoot
OS
EN
20
%
Enable Transient Settling
Time
t
EN-ST
40
μs
VDAC Transient
Over/Undershoot
OS
VDAC
20
%
VDAC Transient Settling
Time
t
VDAC-ST
40
μs



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