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參數(shù)資料
| 型號： | ASM8P18S45ERF-08-PX |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Voltage Mode PWM Controller with EMI Reduction |
| 中文描述： | 1 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 1618K |
| 代理商： | ASM8P18S45ERF-08-PX |
ASM8P18S42 / ASM8P18S42ER
ASM8P1843 / ASM8P18S43ER
ASM8P18S44ER / ASM8P18S45ER
June 2005
rev 0.6
Voltage Mode
PWM Controller with EMI Reduction 4 of 11
Notice: The information in this document is subject to change without notice.
Electrical Characteristics
Unless otherwise noted, V
DD
=15V, Capacitor on F
SEL
= 330pf, I
SENS
= 0.5V. Specifications are over the –40°C to +85°C ambient temperature range. Typical
values are at 25°C.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
REFERENCE SECTION
ASM8P18S42 & ASM8P1843
Output voltage
V
REF
T
A
= +25°C, I
OUT
= 1mA
4.90
5.00
5.1
V
Line Regulation
V
REF
12V < V
DD
< 18V, I
OUT
= 5
μ
A
25
mV
Total Reference variation
Line, Temperature
0.7
%
Temperature Stability
TC
REF
0.5
mV/°C
Load Regulation (ASM8P1843)
ImA < Io < 20mA
25
mV
ERROR AMPLIFIER SECTION
Input Bias Current
I
BIAS
-20
μ
A
Input Voltage
V
I
V
pin1
= 1.25V
1.2
1.25
1.3
V
Open Loop Voltage Gain
A
VOL
65
dB
Power Supply Rejection Ratio
PSRR
V
START
< V
CC
< V
CC
max
80
dB
Output Sink Current
I
OL
V
FB
= 1.32V, V
COMP
= 0.15V
-1.5
mA
Output Source Current
I
OH
V
FB
= 1.18V, V
COMP
= 4.17V
0.3
mA
High Output Voltage
V
OH
V
FB
= 1.25V, R
L
= 15K
4.17
V
Low Output Voltage
V
OL
V
FB
= 1.25V
0.15
V
CURRENT SENSE SECTION
Over Current Protection
Threshold
Delay to output
V
I(MAX)
FB = 0V (V
COMP
= 5V)
0.90
1.00
1.10
V
T
PD
V
FB
= 0V, I
SNS
= 0 to 2V
125
ns
Under Current Sense Period
T
UCS
200
ms
Under Current Recovery Period
T
UCSD
3
Cycles of PWM
Frequency
ASM8P18S42,
ASM8P18S42ER
ASM8P1843
ASM8P18S43ER
ASM8P18S44ER
1/4
1/10
Cycle Skip
Cycle Skip
condition:
I
SENS
≤
0.1V
ASM8P18S45ER
No
Skip
x f
S
OUTPUT SECTION
Low Output Voltage
V
OL
I
SINK
= 50mA
I
SINK
= 200mA
I
SOURCE
= 50mA
I
SOURCE
= 200mA
I
SOURCE
= 0.2A
0.128
0.470
14.71
13.77
6.5
V
High Output Voltage
V
OH
At V
DD
=15V
V
On Resistance, High
R
DS(ON)H
On Resistance, Low
R
DS(ON)L
I
SINK
= 0.2A
2.5
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| ASM8P18S45ERF-08-SX | Voltage Mode PWM Controller with EMI Reduction |
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