SC251EVB SEMTECH [Semtech Corporation], SC251EVB Datasheet - Page 3

• Manufacturer Part Number: SC251EVB
• Description: Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
• Manufacturer: SEMTECH [Semtech Corporation]

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