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參數(shù)資料
| 型號： | LT1622 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Low Input Voltage Current Mode Step-Down DC/DC Controller(低輸入電壓，電流模式步降DC/DC控制器) |
| 中文描述： | 低輸入電壓電流模式降壓DC / DC控制器（低輸入電壓，電流模式步降直流/直流控制器） |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 223K |
| 代理商： | LT1622 |
2
LTC1622
ABSOLUTE
AXI
U
RATIU
W
Input Supply Voltage (V
IN
).........................–0.3V to 10V
RUN/SS Voltage .......................................–0.3V to 2.4V
SYNC/MODE Voltage ................................. –0.3V to V
IN
SENSE
–
Voltage .......................................... 2.4V to V
IN
PDRV Peak Output Current (<10
μ
s)......................... 1A
Storage Ambient Temperature Range... –65
°
C to 150
°
C
W
W
Operating Temperature Range
Commercial ............................................ 0
°
C to 70
°
C
Industrial ........................................... –45
°
C to 85
°
C
Junction Temperature (Note 2).............................125
°
C
Lead Temperature (Soldering, 10 sec)..................300
°
C
PACKAGE/ORDER I
FOR
ATIO
W
U
U
T
JMAX
= 125
°
C,
θ
JA
= 150
°
C/W
S8 PART MARKING
ORDER PART
NUMBER
LTC1622CS8
LTC1622IS8
1622
1622I
ORDER PART
NUMBER
Consult factory for Military grade parts.
1
2
3
4
SENSE
–
I
TH
V
FB
RUN/SS
8
7
6
5
V
IN
PDRV
GND
SYNC/MODE
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125
°
C,
θ
JA
= 250
°
C/W
LTC1622CMS8
MS8 PART MARKING
LTDB
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 4.2V
SYMBOL
I
VFB
V
FB
PARAMETER
Feedback Current
Regulated Feedback Voltage
CONDITIONS
(Note 3) V
FB
= 0.8V
(Note 3) Commercial Grade
(Note 3) Industrial Grade
Referenced to Nominal V
OUT
V
IN
= 4.2V to 8.5V (Note 3)
Measured in Servo Loop; V
ITH
= 0.2V to 0.625V
Measured in Servo Loop; V
ITH
= 0.9V to 0.625V
(Note 4)
V
IN
= 2.3V
V
ITH
= 0V, V
SYNC/MODE
= 2.4V
V
RUN/SS
= 0V
V
RUN/SS
= 0V, V
IN
= V
UVLO
– 0.1V
Commercial Grade
Industrial Grade
V
RUN/SS
= 0V
V
FB
= 0.8V
V
FB
= 0V
V
SYNC/MODE
Ramping Down
V
IN
Ramping Down
V
IN
Ramping Up
MIN
TYP
10
0.8
0.8
7.5
0.04
0.3
–0.3
MAX
70
0.815
0.820
10.5
0.08
0.5
–0.5
UNITS
nA
V
V
%
G
G
0.785
0.780
4
V
OVL
V
OSENSE
V
LOADREG
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
%/V
%
%
I
S
Input DC Supply Current
Burst Mode Inhibited
Sleep Mode
Shutdown
Shutdown
RUN/SS Threshold
450
350
15
4
0.7
0.7
2.5
550
110
1
1.92
1.97
μ
A
μ
A
μ
A
μ
A
V
V
μ
A
kHz
kHz
400
30
10
0.9
1.0
5
625
140
1.5
2.3
2.36
V
RUN/SS
G
G
0.4
0.3
1
475
75
I
RUN/SS
f
OSC
Soft-Start Current Source
Oscillator Frequency
V
SYNC/MODE
V
UVLO
SYNC/MODE Threshold
Undervoltage Lockout
V
V
V
G
1.55
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
SENSE
–
I
TH
V
FB
RUN/SS
V
IN
PDRV
GND
SYNC/MODE
(Note 1)
The
G
denotes specifications which apply over the full operating
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