PRODUCT DATABOOK 1996/1997
LX1664/1664A, LX1665/65A
D
UAL
O
UTPUT
PWM C
ONTROLLERS
P
R O D U C T I O N
WITH
5-B
IT
DAC
D
A T A
S
H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, 10.8 < V
CC
< 13.2, 0°C
≤
T
A
≤
70°C. Test conditions: V
CC
= 12V, T = 25°C. Use Application Circuit.)
Parameter
Reference & DAC Section
Regulation Accuracy
Symbol
Test Conditions
LX1664/1665 (A)
Min. Typ.
Max.
-30
-1
2
1
40
210
2
1
0.42
100
0.8
41
200
27
100
60
200
70
70
11
10
0.06
0.8
0.8
9.9
10.1
0.31
5.5
0.15
30
1
Units
mV
%
µs
µs
ppm
µA
V
V
V
ns
µA
mV
ns
µA
mV
mV
ns
ns
ns
V
V
V
V
V
V
V
mA
V
mA
%
%
V
%
mA
V
%
ppm
%
%
mA
(See Table 1 - Next Page)
Regulation Accuracy
(See Table 1)
(Less 40mV output adaptive positioning)
, V
CC
= 12V, I
LOAD
= 6A
1.8V
≤
V
OUT
≤
2.8V
OT
V
CC_CORE
= 1.3V, C
T
= 390pF
V
CC_CORE
= 3.5V, C
T
= 390pF
V
CC_CORE
= 1.3V to 3.5V
V
CC_CORE
= 1.3V, V
CT
= 1.5V
V
CC_CORE
= 1.3V
V
CC_CORE
= 3.5V
10% Overdrive
1.3V < V
SS
= V
INV
< 3.5V
Timing Section
Off Time Initial
Off Time Temp Stability
Discharging Current
Ramp Peak
Ramp Peak-Valley
Ramp Valley Delay to Output
I
DIS
V
P
V
RPP
180
0.9
0.37
240
1.1
0.47
Error Comparator Section
Input Bias Current
Input Offset Voltage
E
C
Delay to Output
I
B
V
IO
36
10% Overdrive
I
B
V
CLP
1.3V < V
INV
= V
CC_CORE
< 3.5V
Initial Accuracy
Initial Accuracy
10% Overdrive
V
C1
= V
CC
= 12V, C
L
= 3000pF
V
C1
= V
CC
= 12V, C
L
= 3000pF
V
CC
= V
CC
= 12V, I
SOURCE
= 20mA
V
CC
= V
CC
= 12V, I
SINK
= 200mA
V
CC
= V
CC
= 12V, I
SOURCE
= 20mA
V
CC
= V
CC
= 12V, I
SINK
= 200mA
V
CC
= V
C
= 0, I
PULL UP
= 2mA
2
46
Current Sense Section
Input Bias Current (V
CC_CORE
Pin)
Pulse By Pulse C
L
LX1664/1665
LX1664A/1665A
C
S
Delay to Output
85
50
35
115
70
Output Drivers Section
Drive Rise Time
Drive Fall Time
Drive High
Drive Low
Output Pull Down
T
R
T
F
V
DH
V
DL
V
PD
V
ST
V
HYST
I
SD
V
OL
I
CD
0.1
1.2
1.4
10.4
UVLO and S.S. Section
Start-Up Threshold
Hysteresis
SS Sink Current
SS Sat Voltage
V
C1
= 10.1V
V
C1
= 9V, I
SD
= 200µA
V
CC
= V
C1
= 12V, Out Freq = 200kHz, C
L
= 0
(V
CC_CORE
/ DAC
OUT
)
I
PWRGD
= 5mA
(V
CC_CORE
/ V
DAC
)
V
OV
= 5V
Set by external resistors
I
L
= 0.5A using 0.5% resistors
2
0.6
27
Supply Current Section
Dynamic Operating Current
Lower Threshold
Hysteresis
Power Good Voltage Low
Over-Voltage Threshold
OVP Sourcing Current
Power Good / Over-Voltage Protection Section
(LX1665 Only)
88
90
1
0.5
117
45
92
0.7
125
110
30
1.5
-1.5
Linear Regulator Section
Output Voltage
Setpoint Accuracy
Output Temperature Drift
Load Regulation
Cummulative Accuracy
Op-Amp Output Current
3.6
1.5
40
1.5
3
Open Loop
50
70
Copyright © 1999
Rev. 1.2 11/99
3
MICROSEMI [ MICROSEMI CORPORATION ]
