sc250wltrt Semtech Corporation, sc250wltrt Datasheet - Page 3

• Manufacturer Part Number: sc250wltrt
• Description: Sc250 Step-down Dc-dc Converter With Bias Ldo For Rf Power Amplifiers
• Manufacturer: Semtech Corporation

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