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参数资料
| 型号： | LX1734-CLM |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.7 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 3 X 3 MM, EXPOSED PAD, PLASTIC, MO-229, 6 PIN |
| 文件页数： | 3/8页 |
| 文件大小： | 271K |
| 代理商： | LX1734-CLM |
Microsemi
Microsemi Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2002
Rev. 3.0, 2002-09-23
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LX1734
1.0MHz Inverting DC/DC Converter
I N T E GRA T ED
PR ODU C T S
ELECTR ICAL CHARACTERISTIC S
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°C
≤ T
A ≤ 85°C and the following
test conditions: VIN = 5V
LX1734
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Minimum Operating Voltage
VIN
4.25
V
VIN Under Voltage Lockout
UVLO
VIN rising, regulator remains off
3.2
4.25
V
Reference Voltage
VNFB
-1.205 -1.235 -1.255
V
Reference Voltage Line Regulation
4.5V
< V
IN < 5.5V, TAMB > 25°C
18
mV
NFB Pin Bias Current
INFB
-4
-8
A
Quiescent Current
IQ
(Regulator Not Switching, VNFB = -2V)
9
12
mA
Quiescent Current
ISHDN
SD
V
< 0.28V
300
A
Switching Frequency
IOUT = 5mA to 250mA
0.8
1.4
MHz
Maximum Duty Cycle
82
%
Switch VCESAT
ISW = 600mA
650
800
mV
Switch Leakage Current
VSW = 10V
0.02
1
A
Switch Circuit Current Limit
Duty Cycle < 50%
700
mA
High
VSDH
Device Active
2
V
Low
VSDL
Device Disabled
0.8
V
SD
V
= 0.28V
-5
0.4
1.0
A
Shutdown Input Voltage
Bias
Current
ISD
SD
V
= 5V
30
50
A
BLOCK DIAGRAM
Q2
Q1
V
IN
NFB
100k
40pF
Q
SET
CLR
S
R
Q3
0.1
Σ
SW
GND
Ramp
Generator
1.1MHz
Oscillator
+
-
+
-
+
R1 (External)
R2 (External)
C
PL
V
OUT
UVLO
SD
BIAS
Figure 2 – Simplified Block Diagram
EE
LL
EE
CC
TT
RR
IICC
AA
LL
SS
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