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參數(shù)資料
| 型號： | LTC1649CS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Power Timer 8-SOIC -40 to 85 |
| 中文描述： | 20 A SWITCHING CONTROLLER, 260 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 201K |
| 代理商： | LTC1649CS |
2
LTC1649
SYMBOL
V
IN
V
FB
V
CPOUT
I
IN
PARAMETER
Minimum Supply Voltage
Feedback Voltage
Charge Pump Output Voltage
Supply Current (V
IN
)
CONDITIONS
Figure 1 (Note 3)
Figure 1
Figure 1
V
SHDN
= V
CC
, I
LOAD
= 0
V
SHDN
= 0V
P
VCC
= 5V, V
SHDN
= V
CC
(Note 4)
V
SHDN
= 0V
I
CPOUT
= 20mA (Note 5)
MIN
2.7
1.25
4.8
TYP
MAX
UNITS
G
V
V
V
G
1.265
5
3
10
1.5
0.1
700
200
1.28
5.2
5
25
G
G
mA
μ
A
mA
μ
A
kHz
kHz
I
PVCC1, 2
Supply Current (P
VCC1, 2
)
f
CP
f
OSC
V
IH
V
IL
I
IN
gm
V
gm
I
I
IMAX
I
SS
t
r
, t
f
t
NOV
DC
MAX
Internal Charge Pump Frequency
Internal PWM Oscillator Frequency
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current
Error Amplifier Transconductance
I
LIM
Amplifier Transconductance
I
MAX
Sink Current
Soft Start Source Current
Driver Rise/Fall Time
Driver Non-Overlap Time
Maximum Duty Cycle
G
140
2.4
260
G
V
V
G
0.8
±
1
G
±
0.01
650
1300
12
–12
80
130
93
μ
A
μ
Mho
μ
Mho
(Note 6)
V
IMAX
= VCC
V
SS
= 0V
P
VCC1
= P
VCC2
= 5V
P
VCC1
= P
VCC2
= 5V
V
COMP
= V
CC
G
8
16
250
250
μ
A
μ
A
ns
ns
%
G
–8
25
90.5
Supply Voltage
V
IN...........................................................................................
6V
V
CC...........................................................................................
9V
P
VCC1, 2................................................................................
13V
Input Voltage
I
FB.......................................................................
–0.3V to 18V
C
+
, C
–................................................
–0.3V to (V
IN
+ 0.3V)
All Other Inputs ....................... –0.3V to (V
CC
+ 0.3V)
Operating Temperature Range.....................0
°
C to 70
°
C
Storage Temperature Range................. –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)..................300
°
C
ABSOLUTE
AXI
U
RATIU
W
(Note 1)
W
W
T
JMAX
= 150
°
C,
θ
JA
= 110
°
C/W
ORDER PART
NUMBER
LTC1649CS
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
G1
P
VCC1
GND
FB
SHDN
SS
V
IN
C
–
G2
P
VCC2
V
CC
I
FB
I
MAX
COMP
CP
OUT
C
+
PACKAGE/ORDER I
N
FOR
ATIO
U
W
ELECTRICAL CHARACTERISTICS
V
IN
= 3.3V, T
A
= 25
°
C unless otherwise noted. (Note 2)
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a part may be impaired.
Note 2:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3:
Maximum Duty Cycle limitations will limit the output voltage
obtainable at very low supply voltages.
Note 4:
Supply current at P
VCC1
and P
VCC2
is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with the operating voltage and the external MOSFETs used.
Note 5:
Under normal operating conditions, the charge pump will skip
cycles to maintain regulation and the apparent frequency will be lower than
700kHz.
Note 6:
The I
LIM
amplifier can sink but not source current. Under normal
(not current limited) operation, the I
LIM
output current will be zero.
Consult factory for Industrial and Military grade parts.
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