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參數(shù)資料
| 型號： | AP1086K25A |
| 英文描述： | 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
| 中文描述： | 1.5A的低壓差正可調(diào)或固定模式穩(wěn)壓器 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 92K |
| 代理商： | AP1086K25A |
ML4818
PRODUCT SPECIFICATION
8
REV. 1.0.3 6/21/01
Figure 8. Output Drive Saturation Voltage vs.
Output Current
Figure 9. Output Rise/Fall Time
Output Driver Stage
The ML4818 has four high current high speed totem pole
output drivers each capable of 1.5A peak output, designed to
quickly switch the gates of capacitive loads, such as power
MOSFET transistors. Figure 8 illustrates the saturation char-
acteristics of the ouput drive transistors shown in Figure 7.
Typical rise and fall time characteristics of the output drivers
are illustrated with capacitive loads of 1nF and 10nF in
Figure 9.
Current Limit, Fault Detection and Soft Start
Current limit is implemented when the current sensed on I
LIM
reaches the 1V limit. At this point, the PWM cycle is termi-
nated. The flip flop (Figure 10) turns on the current source to
charge C
and remains on for the duration of the clock
period. When C
RST
has charged to 3.4V, a soft start reset
occurs. The number of times the PWM cycle is terminated
due to over-current is “remembered” on C
RST
. Over time,
C
RST
is discharged by R
RST
providing a measure of “forget-
ting” when the over-current condition no longer occurs. This
integrating fault detection is useful in differentiation between
short circuit and load surge conditions.
7
6
5
4
3
2
1
0
0
0.2
0.4
0.6
OUTPUT CURRENT (A)
0.8
1.0
1.2
1.4
S
SOURCE
SINK
~~
15
10
5
100
200
100
200
10nF
1nF
1nF
10nF
t
F
t
R
(ns)
O
Figure 10. Over-Current, Soft-Start, and Integrating Fault Detect Circuits
C
RST
+
–
R
RST
12
+
–
9
4
INHIBIT
OUTPUT
UNDER-VOLTAGE
LOCKOUT
CLOCK
3.4V
1.3V
RC
RESET
R
SENSE
R1
C1
V+
I2
S
Q
R
TERMINATE
PWM CYCLE
V+
I
1
SOFT START
I
SWITCH
C
SS
I
LIM
1V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4818 | Phase Modulation/Soft Switching Controller |
| ML4818CP | Phase Modulation/Soft Switching Controller |
| AP1119Y12A | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
| AP1119 | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
| AP1119Y12 | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AP1086K25G-13 | 功能描述:低壓差穩(wěn)壓器 - LDO 3-TERM ADJ OR FIXED 1.4V LDO 3.3V LOGIC RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| AP1086K25G-U | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:1.5A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR |
| AP1086K25L | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
| AP1086K25L-13 | 功能描述:低壓差穩(wěn)壓器 - LDO LDO BI 1.5A 1.4V 12V 1.25V 2.5V FIX RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| AP1086K25LA | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
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