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参数资料
| 型号： | LTC1143CS |
| 厂商： | Linear Technology |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-SOIC |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 400kHz |
| 占空比： | 100% |
| 电源电压： | 3.5 V ~ 16 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 其它名称： | LTC1143CSW LTC1143CSW-ND |
LTC1143/LTC1143L
LTC1143L-ADJ
TYPICAL PERFOR M A N CE CHARACTERISTICS
14
Gate Charge Supply Current
80
Off-Time vs V OUT
175
Current Sense Threshold Voltage
12
10
Q P = 100nC
70
60
V SENSE = V OUT
150
125
MAXIMUM
THRESHOLD
50
8
40
100
6
30
75
4
Q P = 29nC
20
50
MINIMUM
2
0
10
0
V OUT = 3.3V
V OUT = 5V
25
0
THRESHOLD
20
80
140
200
260
0
1
2
3
4
5
0
20
40
60
80
100
OPERATING FREQUENCY (kHz)
LTC1143 G10
PI N FU N CTIO N S
OUTPUT VOLTAGE (V)
LTC1143 G11
TEMPERATURE (°C)
LTC1143 G12
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.)
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.
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1143CS#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1143CS#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1143CS#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1143L | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual High Efficiency SO-16 Step-Down Switching Regulator Controllers |
| LTC1143L-ADJ | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual High Efficiency SO-16 Step-Down Switching Regulator Controllers |
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