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SS6550 Datasheet(PDF) 3 Page - Silicon Standard Corp.

No. de pieza SS6550
Descripción Electrónicos  Low-Noise Synchronous PWM Step-Down DC/DC Converter
PDF  13 Pages
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Fabricante Electrónico  SSC [Silicon Standard Corp.]
Página de inicio  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6550 Datasheet(HTML) 3 Page - Silicon Standard Corp.

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SS6550
n ELECTRICAL CHARACTERISTICS (V
IN=+3.6V, TA=+25
°C, SYNC/MODE =GND,
SHDN
=IN, unless otherwise specified.)
PARAMETER
SYMBOL CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
VIN
2.5
5.5
Output Adjustment Range
VOUT
(Note 1)
VREF
VIN
V
Feedback Voltage
VFB
0.735
0.75
0.765
V
Line Regulation
Duty Cycle = 100% to 23%
+1
%
Load Regulation
IOUT = 0 to 800mA
-1.3
%/A
FB Input Current
IFB
VFB = 1.4V,
-50
0.01
50
nA
VIN = 3.6V
0.32
0.65
P-channel On-Resistance
PRDS(ON) ILX = 100mA
VIN = 2.5V
0.38
Ω
VIN = 3.6V
0.32
0.65
N-channel On-Resistance
NRDS(ON) ILX = 100mA
VIN = 2.5V
0.38
Ω
P-channel Current-Limit
Threshold
0.85
1.2
1.55
A
Quiescent Current
SYNC/MODE = GND,
VFB = 1.4V, LX unconnected
35
70
µA
Shutdown Supply Current
SHDN
= LX = GND, includes LX
leakage current
0.1
1
µA
LX Leakage Current
VIN = 5.5V, VLX = 0 or 5.5V
-20
0.1
20
µA
Oscillator Frequency
fOSC
400
500
600
KHz
SYNC Capture Range
500
1000
KHz
Maximum Duty Cycle
dutyMAX
100
%
Undervoltage Lockout
Threshold
UVLO
VIN rising, typical hysteresis is
85mV
2.0
2.2
2.4
V
Logic Input High
VIH
SHDN
, SYNC/MODE, LIM
2
V
Logic Input Low
VIL
SHDN
, SYNC/MODE, LIM
0.4
V
Logic Input Current
SHDN
, SYNC/MODE, LIM
-1
0.1
1
µA
SYNC/MODE Minimum
Pulse Width
High or low
500
ns
Note 1:
Specifications to -40°C are guaranteed by design, not production tested.
Rev.2.01 6/06/2003



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