參數(shù)資料
型號： LTC1147IS8-5
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁數(shù)： 3/16頁
文件大小： 225K
代理商： LTC1147IS8-5
3
LTC1147-3.3
LTC1147-5/LTC1147L
sn1147 1147fds
T
A
= 25
°
C, V
IN
= 10V, V
SHDN
= 0V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
5
– V
4
PARAMETER
Current Sense Threshold Voltage (Note 6)
LTC1147-3.3, LTC1147L-3.3
CONDITIONS
MIN
TYP
MAX
UNITS
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= 5V, V6 = V
OUT
/4 + 25mV (Forced)
V
SENSE–
= 5V, V6 = V
OUT
/4 – 25mV (Forced)
25
150
25
150
25
150
mV
mV
mV
mV
mV
mV
130
170
LTC1147–5
130
170
LTC1147L
130
170
V
6
SHDN Pin Threshold
LTC1147-3.3/LTC1147-5/LTC1147L-3.3
SHDN Pin Input Current
LTC1147-3.3/LTC1147-5/LTC1147L-3.3
C
T
Pin Discharge Current
0.5
0.8
2
V
I
6
0V < V
SHDN
< 8V, V
IN
= 16V
V
OUT
in Regulation, V
SENSE–
= V
OUT
V
OUT
= 0V
C
T
= 390pF, I
LOAD
= 700mA
C
L
= 3000pF (Pin 8), V
IN
= 6V
1.2
70
2
5
100
5
μ
A
μ
A
μ
A
μ
s
ns
I
2
50
90
10
6
200
t
OFF
t
r
, t
f
Off-Time (Note 3)
Driver Output Transition Times
4
SYMBOL
V
6
V
OUT
PARAMETER
Feedback Voltage (LTC1147L)
Regulated Output Voltage
LTC1147-3.3/LTC1147L-3.3
LTC1147-5
Input DC Supply Current (Note 2)
LTC1147 Series
Normal Mode
Sleep Mode
Sleep Mode (LTC1147-5)
Shutdown
LTC1147L Series
Normal Mode
Sleep Mode
Shutdown (LTC1147L-3.3)
Current Sense Threshold Voltage (Note 6)
LTC1147-3.3
CONDITIONS
V
IN
= 9V
V
IN
= 9V
I
LOAD
= 700mA
I
LOAD
= 700mA
(Note 5)
MIN
1.20
TYP
1.25
MAX
1.30
UNITS
G
V
G
G
3.17
4.85
3.33
5.05
3.43
5.20
V
V
I
Q
4V < V
IN
< 12V
4V < V
IN
< 12V
5V < V
IN
< 12V
V
SHDN
= 2.1V, 4V < V
IN
< 12V
1.6
160
160
10
2.4
260
260
22
mA
μ
A
μ
A
μ
A
3.5V < V
IN
< 12V
3.5V < V
IN
< 12V
V
SHDN
= 2.1V, 3.5V < V
IN
< 12V
1.6
160
10
2.4
260
22
mA
μ
A
μ
A
V
5
– V
4
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= 5V, 6V = V
OUT
/4 + 25mV (Forced)
V
SENSE–
= 5V, 6V = V
OUT
/4 – 25mV (Forced)
25
150
25
150
25
150
mV
mV
mV
mV
mV
mV
G
125
185
LTC1147-5
G
125
185
LTC1147L
125
185
V
6
SHDN Pin Threshold
LTC1147-3.3/LTC1147-5/LTC1147L-3.3
Off-Time (Note 3)
0V < V
SHDN
< 8V, V
IN
= 16V
C
T
= 390pF, I
LOAD
= 700mA
0.5
3.8
0.8
5
2
V
t
OFF
6.5
μ
s
The
G
denotes specifications which apply over the full specified
temperature range.
Note 1:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC1147CN8-3.3/LTC1147CN8-5: T
J
= T
A
+ (P
D
)(110
°
C/W)
LTC1147LIS/LTC1147IS8/LTC1147LCS/
LTC1147CS8-3.3/LTC1147CS8-5: T
J
= T
A
+ (P
D
)(150
°
C/W)
Note 2:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 3:
In applications where R
SENSE
is placed at ground potential, the off-
time increases approximately 40%.
Note 4:
The LTC1147C is guaranteed to meet specified performance from
0
°
C to 70
°
C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40
°
C and 85
°
C. The
LTC1147I is guaranteed to meet the extended temperature limits.
Note 5:
The LTC1147L/LTC1147L-3.3 allow operation to V
IN
= 3.5V.
Note 6:
The LTC1147L is tested with external feedback resistors resulting
in a nominal output voltage of 2.5V.
–40
°
C
≤
T
A
≤
85
°
C (Note 4), V
IN
= 10V, unless otherwise noted.
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相關代理商/技術參數(shù)
參數(shù)描述
LTC1147IS8-5#PBF 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
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LTC1147L 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Step-Down Switching Regulator Controllers
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