Datasheet

www.ti.com
ELECTRICAL CHARACTERISTICS
f +
1
C
T
ǒ
0.7R
T
) 3R
D
Ǔ
UC1525A, UC1527A
UC2525A, UC2527A
UC3525A, UC3527A
SLUS191C – FEBRUARY 1997 – REVISED JANUARY 2008
+V
IN
= 20 V, and over operating temperature, unless otherwise specified, T
A
= T
J
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
REFERENCE
UC152xA, UC252xA 5.05 5.10 5.15
Output voltage T
J
= 25 ° C V
UC352xA 5.0 5.1 5.2
Line regulationg V
IN
= 8 V to 35 V 10 20
Load regulationg I
L
= 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 V
REF
= 0, T
J
= 25 ° C 80 100 mA
Output noise Voltage
(1)
10 Hz ≤ 10 kHz, T
J
= 25 ° C 40 200 µ Vrms
Long term stability
(1)
T
J
= 125 ° C 20 50 mV
OSCILLATOR SECTION
(2)
Initial accuracy
(1) (2)
T
J
= 25 ° C 2% 6%
UC152xA, UC252xA 0.3% 1%
Voltage stability
(1) (2)
V
IN
= 8 V to 35 V
UC352xA 1% 2%
Temperature stability
(1)
Over operating range 3% 6%
Minimum frequency R
T
= 200 k Ω , C
T
= 0.1 µ F 120 Hz
Maximum frequency R
T
= 2 k Ω , C
T
= 470 pF 400 kHz
Current mirror I
RT
= 2 mA 1.7 2.0 2.2 mA
Clock amplitude
(1) (2)
3.0 3.5 V
Clock width
(1) (2)
T
J
= 25 ° C 0.3 0.5 1.0 µ s
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 (V
CM
= 5.1 V)
UC152xA, UC252xA 0.5 5 mV
Input offset voltage
UC352xA 2 10
Input bias current 1 10
µ A
Input offset current 1
DC open loop gain R
L
≥ 10 M Ω 60 75 dB
Gain-bandwidth product
(1)
A
V
= 0 dB, T
J
= 25 ° C 1 2 MHz
DC transconductanc
(1) (3)
T
J
= 25 ° C, 30 k Ω ≤ R
L
≤ 1 M Ω 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 V
CM
= 1.5 V to 5.2 V 60 75
dB
Supply voltage rejection V
IN
= 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 f
OSC
= 40 kHz (R
T
= 3.6 k Ω , C
T
= 0.01 µ F, R
D
= 0. Approximate oscillator frequency is defined by:
(3) DC transconductance (g
M
) relates to DC open-loop voltage gain (A
V
) according to the following equation: A
V
= g
M
R
L
where R
L
is the
resistance from pin 9 to ground. The minimum g
M
specification is used to calculate minimum A
V
when the error amplifier output is
loaded.
4 Submit Documentation Feedback Copyright © 1997 – 2008, Texas Instruments Incorporated
Product Folder Link(s): UC1525A, UC1527A UC2525A, UC2527A UC3525A, UC3527A