Data Sheet

KA3842B/KA3843B/KA3844B/KA3845B
3
Electrical Characteristics
(V
CC
=15V, R
T
=10KΩ, C
T
=3.3nF, T
A
= 0°C to +70°C, unless otherwise specified)
Parameter Symbol Conditions Min. Typ. Max. Unit
REFERENCE SECTION
Reference Output Voltage V
REF
T
J
= 25°C, I
REF
= 1mA 4.90 5.00 5.10 V
Line Regulation ∆V
REF
12V≤V
CC
≤25V - 6 20 mV
Load Regulation ∆V
REF
1mA≤I
REF
≤20mA - 6 25 mV
Short Circuit Output Current I
SC
T
A
= 25°C - -100 -180 mA
OSCILLATOR SECTION
Oscillation Frequency f T
J
= 25°C475257KHz
Frequency Change with Voltage ∆f/∆V
CC
12V≤V
CC
≤25V - 0.05 1 %
Oscillator Amplitude V
OSC
- -1.6-V
P-P
ERROR AMPLIFIER SECTION
Input Bias Current I
BIAS
- --0.1-2µA
Input Voltage V
I(E>A)
V
pin1
= 2.5V 2.42 2.50 2.58 V
Open Loop Voltage Gain G
VO
2V≤ V
O
≤4V (Note3) 65 90 - dB
Power Supply Rejection Ratio PSRR 12V≤ V
CC
≤25V (Note3) 60 70 - dB
Output Sink Current I
SINK
V
pin2
= 2.7V, V
pin1
= 1.1V 2 7 - mA
Output Source Current I
SOURCE
V
pin2
= 2.3V, V
pin1
= 5V -0.6 -1.0 - mA
High Output Voltage V
OH
V
pin2
= 2.3V, R
L
= 15KΩ to GND56-V
Low Output Voltage V
OL
V
pin2
= 2.7V, R
L
= 15KΩ to Pin 8 - 0.8 1.1 V
CURRENT SENSE SECTION
Gain G
V
(Note 1 & 2) 2.85 3 3.15 V/V
Maximum Input Signal V
I(MAX)
V
pin1
= 5V(Note 1) 0.9 1 1.1 V
Power Supply Rejection Ratio PSRR 12V≤ V
CC
≤25V (Note1,3) - 70 - dB
Input Bias Current I
BIAS
- --3-10µA
OUTPUT SECTION
Low Output Voltage
V
OL
I
SINK
= 20mA - 0.08 0.4 V
I
SINK
= 200mA - 1.4 2.2 V
High Output Voltage
V
OH
I
SOURCE
= 20mA 13 13.5 - V
I
SOURCE
= 200mA 12 13.0 - V
Rise Time t
R
T
J
= 25°C, C
L
= 1nF (Note 3) - 45 150 ns
Fall Time t
F
T
J
= 25°C, C
L
= 1nF (Note 3) - 35 150 ns
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
V
TH(ST)
KA3842B/KA3844B 14.5 16.0 17.5 V
KA3843B/KA3845B 7.8 8.4 9.0 V
Min. Operating Voltage
(After Turn On)
V
OPR(MIN)
KA3842B/KA3844B 8.5 10.0 11.5 V
KA3843B/KA3845B 7.0 7.6 8.2 V