gm34063 Gamma Microelectronics, gm34063 Datasheet - Page 4

• Manufacturer Part Number: gm34063
• Description: Gm34063 1.5a Dc-to-dc Converter Control Circuit
• Manufacturer: Gamma Microelectronics

4
ELECTRICAL CHARACTERISTICS
Frequency (V
Charge Current (V
Discharge Current (V
Discharge to Charge Current Ration (Pin 7 to V
Current Limit Sense Voltage (
Supply Current (V
V
OSCILLATOR
OUTPUT SWITCH (Note 2)
Saturation Voltage, Darlington Connection
(I
Saturation Voltage (Note 3)
(I
DC Current Gain (I
Collector Off - State Current (V
COMPARATOR
Threshold Voltage
T = 25°C
T = T
Threshold Voltage Line Regulation (V
Input Bias Current (V
TOTAL DEVICE
Note 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Note 3. If the output switch is driven into hard saturation (non-arlington configuration) at low switch currents ( 300 mA) and high driver
* The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
A
A
pin5
SW
SW
= 1.0A, Pins 1, 8 connected)
= 1.0 A, R
> V Pin 2 = GND remaining pins open)
CHARACTERISTICS
IOW
currents ( 30 mA), it may take up to 2.0 ms for it to come out of saturation. This condition will shorten the off time at frequencies
switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended:
Forced b of output switch :
th
30 kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output
to T
MICROELECTRONICS
pin5
high
Pins 8
A
= 0 V, C = 1.0nF, T = 25°C)
CC
CC
SW
CC
IN
= 82 W to V
= 5.0V to 40 V, C = 1.0 nF, Pin 7 = V
= 5.0V to 40V, T = 25°C)
= 1.0 A, V
= 0V)
= 5.0V to 40V, T = 25
T
I
chg
CE
EC
CC
A
=
= 40 V)
I driver - 7.0 mA*
, Forced b 20)
= 5.0 V, T = 25°C)
I
C
dischg
CC
A
A
T
A
= 3.0V to 40V)
I output
C
,
T = 25°C )
A
A
°C)
CC A
T =
25°C)
CC
10
(V = 5.0 V, T = T
I
V
dischg
Symbol
CC
V
ipk(sense)
Reg
I
I
V
f
dischg
CE(sat)
C(Off)
OSC
I
h
V
chg
CE(sat)
I
I
FE
CC
IB
th
/
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
line
I
chg
A
Power Management
1.225
1.210
Min
140
250
5.2
24
24
50
-
-
-
-
-
-
IOW
TO Thigh unless otherwise specified)
Typ
1.25
220
300
1.0
0.45
-20
6.5
1.4
33
35
75
40
-
-
1.275
Max
1.29
-400
100
260
350
7.5
1.3
0.7
5.0
4.0
42
42
-
GM34063
Unit
kHz
mV
mV
mA
µA
µA
µA
nA
V
V
V
-
-