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AS1341 Fiches technique(PDF) 4 Page - ams AG

No de pièce AS1341
Description  20V, 600mA, 100% Duty Cycle, Step-Down Converter
PDF  16 Pages
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Fabricant  AMSCO [ams AG]
Site Internet  http://www.ams.com
Logo AMSCO - ams AG

AS1341 Fiches technique(HTML) 4 Page - ams AG

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Revision 1.00
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AS1341
Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
DC Electrical Characteristics
VIN = +12V, SHDNN = VIN, TAMB = -40 to +85ºC. Typical values are at TAMB = +25ºC (unless otherwise specified).
Specifications based on circuit shown in Figure 1 on page 1.
Table 3. Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIN
Input Voltage Range
4.5
20
V
VOUT
Output Voltage (Preset Output)
FB = GND
4.85
5.00
5.15
V
Output Voltage (Adjustable)
1.25
VIN
VDROPOUT
Dropout Voltage
IOUT = 600mA, ILIMIT = VIN
250
mV
Line Regulation
VIN = 6V to 20V, 200
Ω load
0.1
%/V
Load Regulation
ILIMIT = VIN, IOUT = 0 to 500mA
1
%
VFB
Feedback Set Voltage
(Adjustable Output)
1.212
1.25
1.288
V
IIN
Input Supply Current
No load
12
18
µA
IINDROP
Input Supply Current in
Dropout
No load
45
60
µA
Input Shutdown Current
SHDNN = GND
0.8
3
µA
VUVLO
Input Undervoltage Lockout
Threshold
VIN rising
3.6
4.0
4.4
V
VIN falling
3.5
3.9
4.3
OUT Bias Current
VOUT = 5.5V
2
3.5
5
µA
IFB
FB Bias Current
VFB = 1.3V
-25
+25
nA
FB Threshold Low
50
100
150
mV
Thermal Shutdown
10ºC hysteresis
145
ºC
DC-DC Switches
tOFFMIN
LX Switch Minimum Off-Time
0.2
0.4
0.6
µs
tONMAX
LX Switch Maximum On-Time
VFB = 1.3V
8
10
12
µs
RLX
LX Switch On-Resistance
VIN = 6V
0.4
0.8
Ω
VIN = 4.5V
0.5
0.95
ILXPEAK
LX Current Limit
ILIMIT = GND, L = 39µH
500
700
900
mA
ILIMIT = IN, L = 10µH
1000
1400
1800
LX Zero-Crossing Threshold
-75
+75
mV
Zero-Crossing Timeout
LX does not rise above the threshold
30
µs
LX Switch Leakage Current
VIN = 20V, LX = GND, TAMB = +25ºC
0.1
µA
VIN = 20V, LX = GND
1
Control Inputs
Digital Input Level
SHDNN, ILIMIT = GND
0.8
V
SHDNN, ILIMIT = IN
2.4
Digital Input Leakage Current
VSHDNN, VILIMIT = 0 to 20V, VIN = 20V
-100
+100
nA
Power-OK
Power-OK Threshold
Falling edge, relative to VOUT
90
92.5
95
%
POK Output Voltage Low
IPOK = 1mA
0.4
V
POK Output Leakage Current
VIN, VPOK = 16V, TAMB = 25°C
0.1
µA
VIN, VPOK = 16V
1



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