PARAMETER TEST CONDI TION S UC1834
UC2834 UC3834 UNITS
MIN TYP MAX MIN TYP MAX
Turn- on Char act er is tics
Standb y Supply Cur re nt 5 .5 7 5.5 1 0 mA
+1.5 Volt Reference
Out put Voltage TJ = 25°C 1.485 1.5 1.515 1.4 7 1.5 1.53 V
TJ(MIN) ≤ TJ ≤ TJ(MAX) 1.47 1.53 1.455 1.545
Line Reg ulat ion VIN+ = 5 to 35V 1 10 1 15 mV
Load Regulat ion I OUT = 0 to 2mA 1 10 1 15 mV
-2.0 Volt Refe ren ce (No te 2)
Out put Voltage ( Referenced
to VIN+)TJ = 25°C −2.04 −2−1.96 −2.06 −2−1.94 V
TJ(MIN) ≤ TJ ≤ TJ(MAX) −2.06 −1.94 −2.08 −1.92
Line Reg ulat ion VIN+ = 5 to 35V 1.5 15 1.5 20 mV
Out put Impedance 2 .3 2.3 kΩ
Error Amplifier Section
Input O ffs et Vo lta ge VCM = 1. 5 V 1 6 1 10 m V
Input Bias Current VCM = 1. 5 V −1−4−1−8µA
Input O ffs et Cu rr ent VCM = 1. 5 V 0 .1 1 0. 1 2 µA
Sma ll Signal Ope n Loop Ga in Ou tput @ Pin 14, Pin 12 = V IN+
Pin 13, 20 Ω to VIN−50 65 50 65 dB
CMRR VCM = 0. 5 to 33V, VIN+ = 35V 60 80 60 80 dB
PSRR VIN+ = 5 to 35V, VCM = 1.5V 70 100 70 100 dB
Drive r Sect io n
Maximu m Output Current 200 350 200 350 mA
Satur atio n Voltage I OUT = 100mA 0 .5 1.2 0.5 1 .5 V
Out put Leakage Curr ent Pin 12 = 35V, Pin 13 = V IN−, Pin 14 = V IN−0.1 50 0.1 50 µA
Shutdo wn In put Volta ge
at Pin 14 IOUT ≤ 100µA, Pin 13 = VIN−, Pin 12 =
VIN+ 0.4 1 0.4 1 V
Shutd o wn In put Current
at Pin 14 Pin 14 = VIN−, Pin 12 = VIN+
IOUT ≤ 100µA, Pin 13 = VIN−−100 −150 −100 −150 µA
Thermal Shut down (Note 3) 165 165 ° C
Fault Amplif ie r Sect i on
Under- and Over-Voltage
Fault Thr eshold VCM = 1.5V, @ E/A I n puts 12 0 150 1 8 0 11 0 150 1 90 mV
Comm on M ode Sen sitivit y V IN+ = 3 5V, V CM = 1. 5 t o 33 V −0.4 −0.8 −0.4 −1.0 %/v
Supply Sensitivity VCM = 1. 5V, VIN+ = 5 to 35V −0.5 −1.0 −0.5 −1.2 %/V
Fault Delay 30 45 60 30 45 60 ms/µF
Fault Alert Output Curren t 2 5 2 5 mA
Fault Alert Saturatio n Voltage IOUT = 1mA 0 .2 0. 5 0.2 0.5 V
O. V. La tch O ut put Curr ent 2 4 2 4 m A
O. V. Latc h Satura tion Voltag e IOUT = 1mA 1 .0 1. 3 1.0 1 .3 V
O. V. Latc h Out put Reset
Voltage 0.3 0.4 0.6 0.3 0.4 0.6 V
Crowbar Gate Current −100 −175 −100 −175 mA
Crowbar Gat e Leakage
Current VIN+ = 35V, Pin 16 = VIN−−0.5 −50 −0.5 −50 µA
No te 2: When using bot h the 1.5V and
−
2.0V refer enc es the current o ut of pin 3 sh ould be ba lanced by an equ ivalent cur ren t into
Pin 2. The
−
2.0V output will change
−
2.3mV per
µ
A of imbalance.
No te 3: Therm al shut down t ur ns off the drive r . If Pin 15 (O . V. Latch O utput ) is tied to Pin 14 (Com pe nsat ion/ Shu tdown) the
O.V. Latch will be re set.
UC1834
UC2834
UC3834
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA=−55°C to +125°C
for the UC1834, −40°C t o +85°C for the UC2834, and 0°C to +70°C for the
UC3834. VIN+ = 15V, VIN− = 0V, TA = TJ.
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