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UC1525AL Datasheet(PDF) 4 Page - Texas Instruments

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No. de Pieza. UC1525AL
Descripción  REGULATING PULSE WIDTH MODULATORS
Descarga  17 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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UC1525AL Datasheet(HTML) 4 Page - Texas Instruments

 
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ELECTRICAL CHARACTERISTICS
f +
1
C
T 0.7RT ) 3RD
UC1525A, UC1527A
UC2525A, UC2527A
UC3525A, UC3527A
SLUS191C – FEBRUARY 1997 – REVISED JANUARY 2008
+VIN = 20 V, and over operating temperature, unless otherwise specified, TA = TJ
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE
UC152xA, UC252xA
5.05
5.10
5.15
Output voltage
TJ = 25°C
V
UC352xA
5.0
5.1
5.2
Line regulationg
VIN = 8 V to 35 V
10
20
Load regulationg
IL = 0 mA to 20 mA
20
50
mV
Temperature stability(1)
Over operating range
20
50
UC152xA, UC252xA
5.0
5.2
Total output variation(1)
Line, load, and temperature
V
UC352xA
4.95
5.25
Shorter circuit current
VREF = 0, TJ = 25°C
80
100
mA
Output noise Voltage(1)
10 Hz
≤ 10 kHz, TJ = 25°C
40
200
µVrms
Long term stability (1)
TJ = 125°C
20
50
mV
OSCILLATOR SECTION(2)
Initial accuracy(1) (2)
TJ = 25°C
2%
6%
UC152xA, UC252xA
0.3%
1%
Voltage stability(1) (2)
VIN = 8 V to 35 V
UC352xA
1%
2%
Temperature stability(1)
Over operating range
3%
6%
Minimum frequency
RT = 200 kΩ, CT = 0.1 µF
120
Hz
Maximum frequency
RT = 2 kΩ, CT = 470 pF
400
kHz
Current mirror
IRT = 2 mA
1.7
2.0
2.2
mA
Clock amplitude(1) (2)
3.0
3.5
V
Clock width(1) (2)
TJ = 25°C
0.3
0.5
1.0
µs
Syncronization threshold(1) (2)
1.2
2.0
2.8
V
Sync input current
Sync voltage = 3.5 V
1.0
2.5
mA
ERROR AMPLIFIER SECTION (VCM = 5.1 V)
UC152xA, UC252xA
0.5
5
mV
Input offset voltage
UC352xA
2
10
Input bias current
1
10
µA
Input offset current
1
DC open loop gain
RL ≥ 10 MΩ
60
75
dB
Gain-bandwidth product(1)
AV = 0 dB, TJ = 25°C
1
2
MHz
DC transconductanc(1) (3)
TJ = 25°C, 30 kΩ ≤ RL ≤ 1 MΩ
1.1
1.5
mS
Low-level output voltage
0.2
0.5
V
High-level output voltage
3.8
5.6
Common mode rejection
VCM = 1.5 V to 5.2 V
60
75
dB
Supply voltage rejection
VIN = 8 V to 35 V
50
60
(1)
These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.
(2)
Tested at fOSC = 40 kHz (RT = 3.6 kΩ, CT = 0.01 µF, RD = 0. Approximate oscillator frequency is defined by:
(3)
DC transconductance (gM) relates to DC open-loop voltage gain (AV) according to the following equation: AV = gMRL where RL is the
resistance from pin 9 to ground. The minimum gM specification is used to calculate minimum AV when the error amplifier output is
loaded.
4
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Copyright © 1997–2008, Texas Instruments Incorporated
Product Folder Link(s): UC1525A, UC1527A UC2525A, UC2527A UC3525A, UC3527A


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