ML4426
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
V
DD
.......................................................................... 14V
Logic Inputs (BRAKE, F/R) ...................... GND - 0.3 to 7V
All Other Inputs and Outputs .. GND -0.3V to V
DD
+ 0.3V
Output Current (LA, LB, LC,
HA, HB, HC)
............ ±50mA
Junction Temperature .............................................. 150ºC
Storage Temperature Range ...................... –65ºC to 150ºC
Lead Temperature (Soldering 10 sec.) ..................... 260ºC
Thermal Resistance (q
JA
)
28-Pin Narrow PDIP ......................................... 48ºC/W
28-Pin SOIC ..................................................... 75ºC/W
32-Pin TQFP ..................................................... 80ºC/W
OPERATING CONDITIONS
Temperature Range
ML4426CX................................................. 0ºC to 70ºC
ML4426IX ............................................... –40ºC to 85ºC
V
DD
......................................................... 10.8V to 13.2V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified,V
DD
= 12V ± 10%, R
SENSE
= 1W, C
VCO
= 10nF, C
IOS
= 100pF, R
REF
= 137kW,
T
A
= Operating Temperature Range (Notes 1, 2)
SYMBOL
REFERENCE
V
REF
Total Variation
Line, Temp
6.5
6.9
7.5
V
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PWM OSCILLATOR
Total Variation
Ramp Peak
Ramp Valley
Ramp Charging Current
C
T
= 1nF
28
3.9
1.7
?
kHz
V
V
µA
SPEED CONTROL LOOP
SPEED SET Input Voltage Range
SPEED FB Input Voltage Range
SPEED COMP Output Current
SPEED SET Error Amp Transconductance
V
SPEED SET
= xV, V
SPEED FB
= yV
0
0
±5
144
V
REF
V
REF
±20
V
V
µA
µ
START-UP
C
AT
Charging Current
C Suffix
I Suffix
C
AT
Threshold Voltage
C
RT
Charging Current
C Suffix
I Suffix
C
RT
Threshold Voltage
0.68
0.5
1.4
0.68
0.5
1.4
0.98
1.1
1.7
0.98
1.1
1.7
µA
µA
V
µA
µA
V
VOLTAGE CONTROLLED OSCILLATOR
Frequency Range
Frequency vs. SPEED FB
R
VCO
= 5V, SPEED FB = 6V
R
VCO
= 5V, 0.5V
£
SPEED FB
£
7V
1.5
1.85
300
2.2
kHz
Hz/V
CURRENT LIMIT
I
SENSE
Gain
One Shot OFF-Time
C
IOS
= 100pF
C Suffix
I Suffix
4.5
9
9
5.0
5.5
18
20
V/V
µs
µs
4
W
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
