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參數(shù)資料
| 型號： | LTC1143LCS |
| 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, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 372K |
| 代理商： | LTC1143LCS |
5
LTC1143/LTC1143L
LTC1143L-ADJ
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Gate Charge Supply Current
OPERATING FREQUENCY (kHz)
20
G
140
14
12
10
8
6
4
2
0
LTC1143 G10
80
260
200
Q
P
= 100nC
Q
P
= 29nC
Current Sense Threshold Voltage
175
TEMPERATURE (°C)
0
S
150
125
100
75
50
25
0
80
LTC1143 G12
20
40
60
100
MAXIMUM
THRESHOLD
MINIMUM
THRESHOLD
OUTPUT VOLTAGE (V)
0
O
μ
s
80
70
60
50
40
30
20
10
0
4
LTC1143 G11
1
2
3
5
V
SENSE
= V
OUT
V
OUT
= 5V
V
OUT
= 3.3V
Off-Time vs V
OUT
I
TH5
(Pin 7):
Gain Amplifier Decoupling Point, 5V Section.
The 5V section current comparator threshold increases
with the Pin 7 voltage.
SENSE
–
5 (Pin 8):
Connects to internal resistive divider
which sets the output voltage for the 5V section. Pin 8 is
also the (–) input for the current comparator on the 5V
section.
SENSE
+
5 (Pin 9):
The (+) Input to the 5V Section Current
Comparator. A built-in offset between Pins 9 and 8 in
conjunction with R
SENSE 5
sets the current trip threshold
for the 5V section.
SHUTDOWN 5 (Pin 10):
When grounded, the 5V section
operates normally. Pulling Pin 10 high holds the 5V section
MOSFET off and puts the 5V section in micropower shut-
down mode. Requires CMOS logic level signal with t
r
, t
f
< 1
μ
s.
Do not “float” Pin 10.
GND5 (Pin 11):
5V Section Ground. Two independent
ground lines must be routed separately from other grounds
to: 1) the (–) terminal of the 5V section output capacitor
and 2) the cathode of the Schottky diode D2 and (–)
terminal of C
IN5
(see Figure 9).
P-DRIVE 5 (Pin 12):
High Current Drive for Top P-Channel
MOSFET, 5V Section. Voltage swing at this pin is from
V
IN5
to ground.
PI
FU
CTIO
N
S
U
U
LTC1143/LTC1143L
SENSE
+
3 (Pin 1):
The (+) Input to the 3.3V Section Current
Comparator. A built-in offset between Pins 1 and 16 in
conjunction with R
SENSE 3
sets the current trip threshold
for the 3.3V section.
SHUTDOWN 3 (Pin 2):
When grounded, the 3.3V section
operates normally. Pulling Pin 2 high holds the MOSFET
off and puts the 3.3V section in micropower shutdown
mode. Requires CMOS logic level signal with t
r
, t
f
< 1
μ
s.
Do not “float” Pin 2.
GND3 (Pin 3):
3.3V Section Ground. Two independent
ground lines must be routed separately from other grounds
to: 1) the (–) terminal of the 3.3V section output capacitor
and 2) the cathode of the Schottky diode D1 and (–)
terminal of C
IN3
(see Figure 9).
P-DRIVE 3 (Pin 4):
High Current Drive for Top P-Channel
MOSFET, 3.3V Section. Voltage swing at this pin is from
V
IN3
to ground.
V
IN5
(Pin 5):
Supply Pin, 5V Section. Must be closely
decoupled to 5V power ground Pin 11.
C
T5
(Pin 6):
External capacitor C
T5
from Pin 6 to ground sets
the operating frequency for the 5V section. (The actual
frequency is also dependent upon the input voltage.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1143LCS#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-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(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 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:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1143LCS#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 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:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1143LCS#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-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(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 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:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1143LCS-ADJ | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)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) |
| LTC1143LCS-ADJ#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-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(biāo)準(zhǔn)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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