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参数资料
| 型号： | LX1671-CPW |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO38 |
| 封装： | PLASTIC, TSSOP-38 |
| 文件页数： | 16/21页 |
| 文件大小： | 447K |
| 代理商： | LX1671-CPW |
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright
2000
Rev. 1.0a, 2004-06-14
WWW
.Microse
m
i
.CO
M
LX1671
Multiple Output LoadSHARE PWM
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
ELECTRICAL CHA RACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C
≤ TA ≤ 70°C except where
otherwise noted and the following test conditions: VCC = 5V, VCCL = 5V, VCX = 12V HOX = LOX = 3000pF Load
LX1671
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
SWITCHING REGULATORS
VCC
4.5
5.5
V
Input Voltage
VCCL , VCX
16
V
Operation Current
ICC
Static and Dynamic
12
mA
Reference Voltage
TA=25°C
0.792
0.8V
0.808
V
VSS
0°C
≤ TA ≤ 70°C
0.784
0.816
V
Line Regulation (Note 2)
-1
1
%
Load Regulation (Note 2)
-1
1
%
Minimum Pulse Width
250
nS
Maximum Duty Cycle
Load = 3000pF
85
%
ERROR AMPLIFIERS
Input Offset Voltage
Vos
Common Mode Input Voltage = 1V
-6.0
6.0
mV
DC Open Loop Gain
70
dB
Unity Gain Bandwidth
UGBW
16
MHz
High Output Voltage
VOH
I Source = 2 mA
3.8
5.0
V
Low Output Voltage
VOL
I Sink = 10uA
100
mV
Input Common Mode Range
Input Offset Voltage < 20mV
0.1
3.5
V
Input Bias Current
IIN
0 and 3.5 V Common Mode Voltage
100
nA
CURRENT SENSE
Current Sense Bias Current
ISET
VCSX = VVSX – 0.3V , VVSX = 5V
45
50
55
A
Trip Threshold
VTRIP
Reference to VSX , VVSX = 5V
260
300
340
mV
Current Sense Delay
TCSD
350
nS
Current Sense Comparator
Operating Current
ICSX
Current into VSX pins
2
5
mA
OUTPUT DRIVERS – N-CHANNEL MOSFETS
Low Side Driver Operating Current
IVCCL
Static
2.5
mA
High Side Driver Operating Current
IVCX
Static
3
mA
Drive Rise Time, Fall Time
TRF
CL = 3000pF
50
nS
High Level Output Voltage
VDH
ISOURCE = 20mA, VCCL = 12V
10
11
V
Low Level Output Voltage
VDL
ISINK = 20mA, VCCL = 12V
0.15
0.25
V
OSCILLATOR
PWM Switching Frequency
FSW
255
300
345
KHz
Ramp Amplitude
VRAMP
1.25
VPP
EE
LL
EE
CC
TT
RR
IICC
AA
LL
SS
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