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UCC1837 Datasheet(PDF) 2 Page - Texas Instruments

Part # UCC1837
Description  8-Pin N-FET Linear Regulator Controller
Download  14 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC1837 Datasheet(HTML) 2 Page - Texas Instruments

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UCC1837
UCC2837
UCC3837
CONNECTION DIAGRAM
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, TA = –55°C to 125°C for the UCC1837, –25°C to 85°C
for the UCC2837 and 0°C to 70°C for UCC3837; VDD = 5V, CT = 10nF, CCAP = 100nF.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply
Supply Current
VDD = 5V
1
1.5
mA
VDD = 10V
1.2
2
mA
Under Voltage Lockout
Minimum Voltage to Start
2.00
2.65
3.00
V
Minimum Voltage After Start
1.6
2.2
2.6
V
Hysteresis
0.25
0.45
0.65
V
Reference ( Note 1 )
VREF
25°C
1.485
1.5
1.515
V
0°C to 70°C
1.470
1.5
1.530
V
–55°C to 125°C
1.455
1.5
1.545
V
Current Sense
Comparator Offset
0°C to 70°C
90
100
110
mV
Comparator Offset
–55°C to 125°C
85
100
115
mV
Amplifier Offset
120
140
160
mV
Input Bias Current
VCS = 5V
0.5
5
µA
Current Fault Timer
CT Charge Current
VCT = 1V
16
36
56
µA
CT Discharge Current
VCT = 1V
0.4
1.2
1.9
µA
CT Fault Low Threshold
0.4
0.5
0.6
V
CT Fault Hi Threshold
1.3
1.5
1.7
V
Fault Duty Cycle
2
3.3
5
%
Error Amplifier
Input Bias Current
0.5
2
µA
Open Loop Gain
60
90
dB
Transconductance
–10
µA to 10µA
2
5
8
mMho
Charge Current
VCOMP = 6V
20
40
60
µA
Discharge Current
VCOMP = 6V
10
25
40
µA
DIL-8, SOIC-8 (Top View)
J or N Package, D Package
ABSOLUTE MAXIMUM RATINGS
All pins referenced to GND . . . . . . . . . . . . . . . . . –0.3V to +15V
CS, CT, FB . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VDD + 0.3V
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C
Currents are positive into, negative out of the specified terminal.
Consult Packaging Section of Databook for thermal limitations
and considerations of packages.


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