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| 型号： | LT1572CS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 1.25A 16SOIC |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，Cuk，回扫，正向转换器，Sepic |
| 输出数： | 1 |
| 输入电压： | 3 V ~ 30 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 1.25A |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-SOIC |
LT1572
100kHz, 1.25A Switching
Regulator with Catch Diode
FEATURE S
D ESCRIPTIO
s
s
s
s
s
s
s
s
s
Catch Diode Included in Package
Wide Input Voltage Range: 3V to 30V
Low Quiescent Current: 6mA
Internal 1.25A Switch
Very Few External Parts Required
Self-Protected Against Overloads
Operates in Nearly All Switching Topologies
Shutdown Mode Draws Only 50 μ A Typical Current
Can Be Externally Synchronized
The LT ? 1572 is a 1.25A 100kHz monolithic switching
regulator with on-board switch and catch diode included
in one package. It combines an LT1172 with a 1A Schottky
catch diode. The LT1572 can be operated in all standard
switching configurations, including boost, buck, SEPIC,
flyback, forward, inverting and “Cuk”. All necessary con-
trol, oscillator and protection circuitry is included on the
die with the high efficiency switch. This makes the part
extremely easy to use and provides “bustproof” operation
similar to that obtained with 3-pin linear regulators.
3.3V-to-5V and 5V-to-12V Boost Converters
Negative-to-Positive Converter
SEPIC Converter (Input Can Be Greater or
Battery Charger
A PPLICATI S
s
s
s
Less Than Output)
s
TYPICAL A PPLICATI
5V-to-12V Boost Converter
The LT1572 operates with supply voltages from 3V to 30V
and draws only 6mA quiescent current. It can deliver load
power up to 15W with no external power devices. By
utilizing a current mode switching technique, the LT1572
achieves excellent response to load and line transients.
The LT1572 has many unique features not found on the
more difficult to use control chips presently available. It
uses adaptive anti-sat switch drive to allow very wide
ranging load currents with no loss in efficiency. An exter-
nally activated shutdown mode reduces total supply cur-
rent to 50 μ A typical for standby operation. External syn-
chronizing of switching frequency is possible, with a range
of 120kHz to 160kHz.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Boost Converter Efficiency
V SW ANODE
ALWAYS CONNECT BOTH ANODE (2, 15)
V IN
4.5V
TO 10V
9
V IN
L1*
50 μ H
11 2 15
?
3
* COILTRONICS CTX50-2
** AVX TPS OR SPRAGUE 593D
?
AND CATHODE (3, 14) PINS
100
90
BOOST CONVERTER
V IN = 5V
V OUT = 12V
CATHODE ? 14
12V
80
+
C3
100 μ F
10V
E1
10
LT1572
E2 GND
12 4, 13
FB
V C
5
R3
1k
C1
1 μ F
R1
10.7k
1%
R2
1.24k
1%
+
0.25A
C2**
100 μ F
16V
70
60
50
0
50
100 150
L0AD CURRENT (mA)
200
250
LT1572 ? TA01
LT1572 ? TA01
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1573 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Dropout PNP Regulator Driver |
| LT-1573-111-024 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT1573C | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Dropout PNP Regulator Driver |
| LT1573CS8 | 功能描述:IC REG CTRLR SGL POS ADJ 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| LT1573CS8#PBF | 功能描述:IC REG CTRLR SGL POS ADJ 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
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