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SC1172CSW bảng dữ liệu(PDF) 2 Page - Semtech Corporation

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Giải thích chi tiết về linh kiện  PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER WITH LOW DROPOUT REGULATOR CONTROLLER
PDF  12 Pages
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
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PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER WITH LOW DROPOUT
REGULATOR CONTROLLER
SC1172/3
© 1999 SEMTECH CORP.
October 25, 1999
652 MITCHELL ROAD NEWBURY PARK CA 91320
2
ELECTRICAL CHARACTERISTICS
Unless specified: V
CC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CSp-CSm) < 60mV; LDOV = 11.4V to 12.6V; TA = 25
oC
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switching Section
Output Voltage
I
O = 2A
See Note 1.
Supply Voltage
V
CC
4.2
7
V
Supply Current
V
CC = 5.0
8
15
mA
Load Regulation
I
O = 0.8A to 15A
1
%
Line Regulation
0.5
%
Minimum operating voltage
4.2
V
Current Limit Voltage
60
70
80
mV
Oscillator Frequency
180
200
220
kHz
Oscillator Max Duty Cycle
90
95
%
DH Sink/Source Current
BSTH-DH = 4.5V, DH-PGNDH = 2V
1A
DL Sink/Source Current
BSTL-DL = 4.5V, DL-PGNDL = 2V
1A
Output Voltage Tempco
30
100
ppm/
oC
Gain (A
OL)VOSENSE to VO
35
dB
OVP threshold voltage
120
%
OVP source current
V
OVP = 3.0V
10
mA
Power good threshold voltage
88
112
%
Dead time
50
100
ns
Linear Section
Quiescent current
LDOV = 12V
5
mA
Output Voltage (SC1172)
1.485 1.500 1.515
V
Reference Voltage (SC1173)
1.252 1.265 1.278
V
Feedback Pin Bias Current (SC1173)
10
uA
Gain (A
OL)
LDOS to GATE
90
dB
Load Regulation
I
O = 0 to 8A
(2)
0.3
%
Line Regulation
0.3
%
Output Impedance
200
Ω
Parameter
Symbol
Maximum
Units
V
CC to GND
V
IN
-0.3 to +7
V
PGND to GND
± 1
V
BST to GND
-0.3 to +15
V
Operating Temperature Range
T
A
0 to +70
°C
Junction Temperature Range
T
J
0 to +125
°C
Storage Temperature Range
T
STG
-65 to +150
°C
Lead Temperature (Soldering) 10 seconds
T
L
300
°C
Thermal Impedance Junction to Ambient
θ
JA
80
°C/W
Thermal Impedance Junction to Case
θ
JC
25
°C/W
ABSOLUTE MAXIMUM RATINGS
Notes: (1) See Output Voltage table
(2) In application circuit



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