Datasheet

UC2902
UC3902
SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011
3
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ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 105°C, (unless otherwise noted)
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
Power SUPPLY SUPPLY CURRENT
I
Supply current
SHARE+ = 1 V, SENSE = 0 V 4 6
mA
I
CC
Supply current
V
CC
= 20 V 6 10
mA
UNDERVOLTAGE LOCKOUT
V
CC
Startup voltage SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V 2.3 2.5 2.7 V
Hysteresis SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V 60 100 140 mV
CURRENT SENSE AMPLIFIER
V
IO
Input offset voltage 0.1 V ≤ V
(SHARE+)
≤ 1.1 V −2.5 −0.5 1.5 mV
SENSE to SHARE gain 0.1 V ≤ V
(SHARE+)
≤ 1.1 V −41 −40 −39 V
R
IN
Input resistance 0.6 1 1.5 V
SHARE DRIVE AMPLIFIER
V
CC
= 2.5 V V
(SENSE)
= −50 mV
I
(SHARE+)
= −1 mA
1.2 1.4
V
OH
High-level output voltage,
SHARE+
V
CC
= 12 V V
(SENSE)
= −250 mV
I
(SHARE+)
= −1 mA
9.6 10.0 10.4
V
SHARE+
V
CC
= 20 V V
(SENSE)
= −250 mV
I
(SHARE+)
= −1 mA
9.6 10.0 10.4
V
CC
= 2.5 V V
(SENSE)
= 10 mV
I
(SHARE+)
= −1 mA
20 50
V
OL
Low-level output voltage, SHARE+
V
CC
= 12 V V
(SENSE)
= 10 mV
I
(SHARE+)
= −1 mA
20 50
mV
V
CC
= 20 V V
(SENSE)
= 10 mV
I
(SHARE+)
= −1 mA
20 50
mV
V
O
Output voltage, SHARE+
V
(SENSE)
= 0 mV, R
(SHARE+)
= 200 Ω
(SHARE+ to GND)
20 40
CMRR Common mode rejection ratio
0 V ≤ V
(SHARE−)
≤ 1 V,
SENSE used as input to amplifier
50 90 dB
Load regulation
Load on SHARE+, 1 mA ≤ I
LOAD
≤ −20 mA
V
(SENSE)
= −25 mV
0 20 mV
I
SC
Short circuit current V
(SHARE+)
= 0 V, V
(SENSE)
= −25 mV −85 −50 −20 mA
Slew rate
V
(SENSE)
= 10 mV to −90 mV step
R
(SHARE+)
= 200 Ω (SHARE+ to GND)
0.12 0.26 0.38
V/ s
Slew rate
V
(SENSE)
= −90 mV to 10 mV step
R
(SHARE+)
= 200 Ω (SHARE+ to GND)
0.12 0.26 0.38
V/μs