LX1668CDW Microsemi Analog Mixed Signal Group, LX1668CDW Datasheet - Page 3

• Manufacturer Part Number: LX1668CDW
• Description: IC CTRLR DC/DC PROG SW 20SOIC
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of LX1668CDW

• Applications: Controller, Intel Pentium® II, III
• Voltage - Input: 5V, 12V
• Number Of Outputs: 3
• Voltage - Output: 1.3 ~ 3.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 1999
Rev. 1.0a
(Unless otherwise specified, 4.75V < V
T = 25°C.)
Reference & DAC
Initial Accuracy
Cumulative Regulation Accuracy
Timing
Off Time
Swicthing Frequency
Error Comparator / CS-
Input Bias Current
E
Current Sense +
Input Resistance
Pulse By Pulse Current Limit
Current Sense Delay To Output
Output Drivers
Drive Rise Time, Fall Time
Drive High
Drive Low
UVLO and Soft-Start (SS)
V
Hysteresis
SS Resistor
SS Output Enable
Hiccup Duty Cycle
Supply Current
V
Static Supply Current
Power Good / Over-Voltage Protection (OVP)
Threshold
Hysteresis
Power Good Voltage Low
Over-Voltage Threshold
OVP Sourcing Current
Fixed Linear Regulator (V
Voltage Reference Tolerance
Regulation
Current Limit
Linear Regulator Controller
Voltage Reference Tolerance
Source Current
Sink Current
VID Pins
Low Input
High Input
C
CC5
CC12
Delay to Output
Start-Up Threshold
Dynamic Supply Current
Parameter
12V
5V
3.3V
OUT2
)
P
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
CC5
ROGRAMMABLE
< 5.25V and 10.8V < V
Symbol
V
Freq
R
DC
I
V
I
I
I
I
V
VCC12
OT
V
V
CORE
CORE
T
V
R
VCC5
VCC3
LDRV
LDRV
V
I
I
V
FB
CLP
DH
CD
EN
RF
DL
ST
SS
IH
IL
HIC
P
E L E C T R I C A L C H A R A C T E R I S T I C S
R O D U C T I O N
(Less 40mV output adaptive positioning),
1.3V V
V
V
1.0V < V
Overdrive
0V < V
Overdrive
C
I
I
V
C
Out Freq = 200kHz, C
V
V
V
(V
(V
I
(V
V
V
-10mA I
V
V
I
Internally pulled up to V
PWRGD
SOURCE
SINK
LDRV
CORE
CORE
CC12
SS
SS
SS
OVP
OUT2
OUT2
LFB
L
SS
CORE
CORE
CORE
= 3000pF
< 0.5V
< 0.5V
< 0.5V
= 0.1µF, V
= 20mA
= 1.5V, C
flows from V
= 2.0V
> 3.9V
= 2.5V, C
= 2.0V
= 1.3V to 3.5V
= 4mA
/ V
/ V
= 20mA
/ V
FB
2V
M
CORE
SET
SET
SS
= V
SET
OUT2
) V
) V
= V
), V
U LTIPLE
CORE
CC12
5mV
5mV
OUT
DAC
FB
CORE
3.5V
CORE
CORE
OUT
Test Conditions
< 3.5V
< 3.5V
-150mA
< 13.2V, 0°C
= 330µF
CC12
= 2.00V, F
= 220µF
rising
rising, V
falling, V
O
L
= 3000pF, Synch., V
UTPUT
CC5
D
OUT2
OUT2
REQ
thru 30k
A T A
= 100Hz
2.0V
T
2.0V
DC:DC C
A
70°C. Test conditions: V
1.3V
S
H E E T
V
SS
CORE
ONTROLLER
> 0.5V
35V, T = 25°C
CC3
= V
Min.
-1.5
-2.3
-2.3
108
110
250
3.9
0.4
2.0
45
10
90
35
30
-1
-1
CC5
, V
LX1668
CC5
Typ.
0.10
-0.3
250
100
100
100
110
117
2.4
0.1
4.2
0.5
0.4
0.5
0.2
12
60
11
18
10
24
13
91
60
6
2
= 5V, V
LX1668
+2.0
+1.5
Max.
111
125
1.5
4.6
0.7
0.8
+1
18
92
+1
CC12
-1
9
2
= 12V,
Units
kHz
mA
mA
mA
mA
mA
mA
mA
mA
k
mV
k
µA
%
%
µs
ns
ns
ns
%
%
%
%
%
%
%
%
V
V
V
V
V
V
V
V
3