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| 型号： | LTC1143CS |
| 厂商： | Linear Technology |
| 文件页数： | 1/20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
Dual High Efficiency SO-16
Step-Down Switching Regulator
Controllers
FEATURES
DESCRIPTIO N
s
s
s
s
s
s
s
s
s
Dual Outputs
LTC1143, LTC1143L: 3.3V, 5V
LTC1143L-ADJ: Dual Adjustable
Very High Efficiency: Over 95% Possible
Current Mode Operation for Excellent Line and Load
Transient Response
High Efficiency Maintained over Three Decades of
Output Current
Low Standby Current at Light Loads: 160 μ A/Output
Logic-Controlled Shutdown (LTC1143, LTC1143L)
Wide V IN Range: 3.5V to 16V
(LTC1143L, LTC1143L-ADJ)
Very Low Dropout Operation: 100% Duty Cycle
Available in Narrow 16-Pin SO Package
The LTC1143 series is a dual step-down switching regulator
controller featuring automatic Burst Mode TM operation to
maintain high efficiencies at low output currents. This
device is composed of two separate regulator blocks,
each driving an external power MOSFET at switching
frequencies up to 400kHz using a constant off-time current
mode architecture. Both fixed and adjustable voltages are
available.
The operating current level for both regulators is user-
programmable via an external current sense resistor.
Wide input supply range allows operation from 4V to 14V
(16V maximum). The LTC1143L and LTC1143L-ADJ
extend operation to V IN = 3.5V. 100% duty cycle provides
low dropout regulation limited only by the R DS(ON) of the
external MOSFET and resistance of the inductor and
APPLICATIO N S
current sense resistor.
s
s
s
s
s
Personal Digital Assistants
Notebook and Palmtop Computers
Battery-Operated Digital Devices
Portable Instruments
DC Power Distribution Systems
The LTC1143 series is ideal for applications requiring dual
output voltages with high conversion efficiencies over a
wide load current range in a small amount of board space.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO N
V IN
4V TO 14V
V OUT1
3.3V/2A
R SENSE1
0.05 ?
+ C IN1
22 μ F
25V
× 2
L1
27 μ H
0.22 μ F
P1A
4
1
13
V IN1
P-DRIVE 1
SENSE + 1
5
V IN2
P-DRIVE 2
SENSE + 2
12
9
0.22 μ F
P1B
+
L2
27 μ H
C IN2
22 μ F
25V
× 2
R SENSE2
0.05 ?
V OUT2
2.5V/2A
1000pF
LTC1143L-ADJ
1000pF
D1
D2
C OUT1
220 μ F
10V
× 2
+
R1
49.9k
1%
R2
82.5k
1%
100pF
16
MBRS320T3
2
SENSE – 1
V FB1
GND1
3
C T1
14
I TH1
15
I TH2
7
C T2
6
SENSE – 2
V FB2
GND2
11
8
MBRS320T3
10
100pF
R4
49.9k
1%
+
R3
49.9k
1%
C OUT2
220 μ F
10V
× 2
R C1
1k
R C2
1k
L1, L2: SUMIDA CDRH125-270
C T1
300pF
C C1 C C2
3300pF 3300pF
C T2
300pF
P1: SILICONIX Si4953DY/FAIRCHILD NDS8947
R SENSE1, R SENSE2 : DALE WSL-2010-.05
1143 F01
Figure 1. High Efficiency Dual 3.3V/2.5V Regulator
1
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相关代理商/技术参数 |
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|---|---|
| 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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