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參數(shù)資料
| 型號： | LT1507IS8#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 18/20頁 |
| 文件大?。?/td> | 291K |
| 代理商： | LT1507IS8#TR |
7
LT1507
BLOCK DIAGRAM
W
APPLICATIONS INFORMATION
WU
U
FEEDBACK PIN FUNCTIONS
The feedback pin (FB or SENSE) on the LT1507 is used to
set output voltage and also to provide several overload
protection features. The first part of this section deals with
selecting resistors to set output voltage and the remaining
part talks about foldback frequency and current limiting
created by the FB pin. Please read both parts before
Note: This application section is adapted from the more
complete version found in the LT1375/LT1376 data sheet.
If more details are desired consult the LT1375/LT1376
Applications Information section, but please acquaint
yourself thoroughly with this LT1507 information first so
that differences between the LT1375 and the LT1507 do
not cause confusion.
Figure 1. Block Diagram
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+
–
+
–
+
–
+
Σ
VIN
2.9V BIAS
REGULATOR
500kHz
OSCILLATOR
FREQUENCY
SHIFT CIRCUIT
VSW
FB/SENSE
7
3
1
8
4
5
2
6
VC
GND
LT1507 BD
SLOPE COMP
0.1
BIAS
INTERNAL
VCC
CURRENT
SENSE
AMPLIFIER
VOLTAGE GAIN = 5
SYNC
SHUTDOWN
COMPARATOR
CURRENT
COMPARATOR
ERROR
AMPLIFIER
gm = 2000mho
FOLDBACK
CURRENT
LIMIT
CLAMP
BOOST
RS
FLIP-FLOP
DRIVER
CIRCUITRY
S
R
0.9V
SHDN
LOCKOUT
COMPARATOR
0.4V
3.5
A
Q2
Q1
POWER
SWITCH
2.38V
2.42V
–
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| LT1509CS | 2 A POWER FACTOR CONTROLLER WITH POST REGULATOR, PDSO20 |
| LT1513CT7 | 5.4 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PZFM7 |
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