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參數(shù)資料
| 型號： | LX1669CDT |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Current-Mode SMPS Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 337K |
| 代理商： | LX1669CDT |
P
R O G R A M M A B L E
D C : D C C
O N T R O L L E R
LX1669
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
3
Copyright 1999
Rev. 1.0 4/99
P
R O D U C T I O N
D
A T A
S
H E E T
ELECTRICAL CHARACTERISTICS
(
Unless otherwise specified, 4.75V < V
CC5
< 5.25V and 10.8V < V
CC12
< 13.2V, 0°C
≤
T
A
≤
70°C. Test conditions: V
CC5
= 5V, V
CC12
= 12V, T = 25°C.
)
Reference & DAC
Initial Accuracy
Cumulative Regulation Accuracy
Timing
Off Time
Switching Frequency
Error Comparator / CS-
Input Bias Current
E
C
Delay to Output
Current Sense +
Parameter
Symbol
Test Conditions
V
CORE
(Less 40mV output adaptive positioning)
, 1.3V
≤
V
CORE
≤
3.5V, T
A
= 25°C
1.3V
≤
V
CORE
≤
3.5V
OT
Freq
V
CORE
= 2.0V
V
CORE
= 1.3V to 3.5V
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
CC5
Start-Up Threshold
Hysteresis
SS Resistor
SS Output Enable
Hiccup Duty Cycle
Supply Current
V
CC12
Dynamic Supply Current
Static Supply Current
R
CORE
V
CLP
0V < V
FB
= V
CORE
< 3.5V
Overdrive
≤
5mV
I
FB
1.0V < V
SS
= V
FB
< 3.5V
Overdrive
≤
5mV
T
RF
V
DH
V
DL
C
L
= 3000pF
I
SOURCE
= 20mA
I
SINK
= 20mA
V
ST
V
CC12
> 3.9V
R
SS
V
EN
DC
HIC
C
SS
= 0.1μF, V
DAC
= 2.00V, F
REQ
= 100Hz
I
CD
I
VCC12
I
VCC5
Out Freq = 200kHz, C
L
= 3000pF, Synch., V
SS
> 0.5V
V
SS
< 0.5V
V
SS
< 0.5V
12V
5V
Power Good / Over-Voltage Protection (OVP)
Threshold
(V
CORE
/ V
SET
) V
CORE
rising, V
OUT2
≥
2.0V
(V
CORE
/ V
SET
) V
CORE
falling, V
OUT2
≥
2.0V
Hysteresis
Power Good Voltage Low
Over-Voltage Threshold
OVP Sourcing Current
VID Pins
Low Input
High Input
I
PWRGD
= 4mA
(V
CORE
/ V
SET
), V
CORE
rising
V
OVP
= 2.0V
Units
-1
+1
1.5
%
%
-1.5
LX1669
Typ.
Min.
Max.
2.4
250
μs
kHz
-0.3
100
-1
μA
ns
12
60
100
k
mV
ns
45
100
11
0.1
ns
V
V
10
0.2
3.9
4.2
0.10
18
0.5
10
4.6
V
V
k
V
%
0.4
24
6
13
mA
mA
mA
9
18
108
90
110
91
2
0.5
117
60
111
92
%
%
%
V
%
mA
0.7
125
110
35
0.8
V
V
2.0
V
IL
V
IH
Internally pulled up to V
CC5
thru 30k
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