参数资料
型号: LX1684CD-TR
厂商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分类: 稳压器
英文描述: 1 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO14
封装: PLASTIC, SOIC-14
文件页数: 6/12页
文件大小: 248K
代理商: LX1684CD-TR
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2000
Rev. 1.0c, 2005-03-08
WWW
.Microse
m
i
.CO
M
LX1684
Voltage-Mode PWM Controller
PRODUCTION DATA SHEET
TM
ELECTRI CAL CHA RACTERI S TI CS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C
TA 70°C except where
otherwise noted. Test conditions: VCC=5V, VC1=16V
LX1684
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
REFERENCE
Reference Voltage
VFB
VOUT =VFB, TA=25°C
1.237
1.25
1.262
V
VOUT =VFB, 0°C < TA < 70°C
1.231
1.269
V
OSCILLATOR
Frequency
FOSC
135
175
200
kHz
Ramp Amplitude
VRAMP
1.25
VPP
ERROR AMPLIFIER
Input Resistance
RIN
VOUT = VFB
20
k
CURRENT SENSE
Current Set
ISET
VCS = VCC –0.4V
40
45
A
VTRIP
300
380
420
mV
Current Sense Delayed
TCSD
1.0
sec
OUTPUT DRIVERS
Drive Rise Time, Fall Time
TRF
CL = 3000pF
50
nS
Drive High
VDH
ISOURCE = 20mA, VC1=16V
13
14
V
Drive Low
VDL
ISINK = 20mA, VC1 =16V
0.1
0.2
V
UVLO AND SOFT-START (SS)
VCC5 Start-Up Threshold
VST
VC1 > 4.0V
4.0
4.25
4.5
V
Hysteresis
0.10
V
SS Resistor
RSS
22
k
SS Output Enable
VEN
0.25
0.3
0.35
V
Hiccup Duty Cycle
DCHIC
CSS = 0.1F, FREQ =100Hz
12
14
%
SUPPLY CURRENT
VC1 Dynamic Supply Current
ICD
Out Freq = 175kHz, CL=3000pF, Synch., VSS
> 0.3V
30
40
mA
Static Supply Current VC1
IVC1
VSS < 0.3V ; outputs low (disable), VC1 = 16V
7
9
mA
5V
IVCC
VSS > 0.3V ; outputs low (disable)
9
12
mA
EE
LL
EE
CC
TT
RR
IICC
AA
LL
SS
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