ELECTRICAL CHARACTERISTICS
(T
A
= 0°C to 70°C, *V
CC
=15V, C
T
=3.3nF, R
T
=10kW, unless otherwise specified )
CHARACTERISTICS
Reference Section
Reference Output Voltage
Line Regulation
Load Regulation
Short Circuit Output Current
Oscillator Section
Oscillation Frequency
Frequency Change with Voltage
Oscillator Amplitude
Error Amplifier Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Current Sense Section
Current Sense Input Voltage Gain
Maximum Input Signal
Supply Voltage Rejection
Input Bias Current
Output Section
Low Output Voltage
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
REF
DV
REF
DV
REF
I
SC
T
J
= 25°C, I
REF
= 1mA
12V
1mA
V
CC
25V
I
REF
20mA
T
A
=25°C
T
J
= 25°C
12V
V
CC
25V
(Peak to Peak)
4.9
5.0
6.0
6.0
-100
5.1
20
25
-180
V
mV
mV
mA
f
Df/ DV
CC
V
(OSC)
I
BIAS
V
I(EA)
A
VOL
PSRR
I
SINK
I
SOURCE
V
OH
V
OL
G
V
V
I(MAX)
SVR
I
BIAS
12V
47
52
0.05
1.6
57
1.0
kHz
%
V
V
FB
= 3V
V
PIN1
=2.5V
2V
12V
V
O
4V
V
CC
25V
2.42
65
60
2
-0.5
5.0
-0.1
2.5
90
70
7
-1.0
6.0
0.8
-2
2.58
µA
V
dB
dB
mA
mA
V
V
PIN2
=2.7V, V
PIN1
=1.1V
V
PIN2
=2.3V, V
PIN1
=5V
V
PIN2
=2.3V, R
L
=15kW to GND
V
PIN2
=2.7V, R
L
=15kW to PIN8
(Note 1 and 2)
V
PIN1
=5V (Note 1)
V
CC
25V (Note 1)
V
PIN3
=3V
I
SINK
= 20mA
I
SINK
= 200mA
I
SOURCE
= 20mA
I
SOURCE
= 200mA
T
J
= 25°C, C
L
= 1nF(Note 3)
T
J
= 25°C, C
L
= 1nF(Note 3)
1.1
V
2.85
0.9
3.0
1.0
70
-3.0
3.15
1.1
V/ V
dB
-10
µA
V
OL
V
OH
t
R
t
F
0.08
1.4
13
12
13.5
13
45
35
0.4
2.2
V
High Output Voltage
Rise Time
Fall Time
Undervoltage Lockout Section
Start Threshold
Minimum Operating Voltage
(after tum ON)
V
150
150
nS
nS
V
TH(ST)
V
OPR(MIN)
GM3842A, GM3844A
GM3843A, GM3845A
GM3842A, GM3844A
GM3843A, GM3845A
14.5
7.8
8.5
7.0
16.0
8.4
10
7.6
17.5
9.0
11.5
8.2
V
V
GM3842A, GM3843A, GM3844A, GM3845A
5
V
GAMMA [ GAMMA MICROELECTRONICS INC. ]
