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参数资料
| 型号： | LT1572 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | 100kHz, 1.25A Switching Regulator with Catch Diode(100kHz, 1.25A 开关稳压器(带箝位二极管）) |
| 中文描述： | 100kHz时，1.25A的开关稳压抓住二极管（100kHz时，1.25A的开关稳压器（带钳位二极管）） |
| 文件页数： | 1/12页 |
| 文件大小： | 222K |
| 代理商： | LT1572 |
1
LT1572
100kHz, 1.25A Switching
Regulator with Catch Diode
Boost Converter Efficiency
L0AD CURRENT (mA)
0
E
80
90
100
200
LT1572 TA01
70
60
50
50
100
150
250
BOOST CONVERTER
V
IN
= 5V
V
OUT
= 12V
D
U
ESCRIPTIO
S
FEATURE
I
Catch Diode Included in Package
I
Wide Input Voltage Range: 3V to 30V
I
Low Quiescent Current: 6mA
I
Internal 1.25A Switch
I
Very Few External Parts Required
I
Self-Protected Against Overloads
I
Operates in Nearly All Switching Topologies
I
Shutdown Mode Draws Only 50
μ
A Typical Current
I
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.
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.
U
S
A
O
PPLICATI
I
3.3V-to-5V and 5V-to-12V Boost Converters
I
Negative-to-Positive Converter
I
SEPIC Converter (Input Can Be Greater or
Less Than Output)
I
Battery Charger
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
A
O
PPLICATI
5V-to-12V Boost Converter
TYPICAL
LT1572 TA01
R1
10.7k
1%
+
C1
1
μ
F
R2
1.24k
1%
LT1572
GND
E2
E1
V
IN
L1*
50
μ
H
V
SW
ANODE
CATHODE
15
14
3
2
11
9
R3
1k
5
4, 13
12
10
COILTRONICS CTX50-2
AVX TPS OR SPRAGUE 593D
ALWAYS CONNECT BOTH ANODE (2, 15)
AND CATHODE (3, 14) PINS
*
**
FB
V
C
12V
0.25A
V
IN
4.5V
TO 10V
C3
100
μ
F
10V
+
C2**
100
μ
F
16V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1572CS | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1572CS#PBF | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1572CS#TR | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1572CS#TRPBF | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1573 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Dropout PNP Regulator Driver |
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