参数资料
型号: LT1767EMS8-1.8#TRPBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC REG BUCK 1.8V 1.5A 8MSOP
标准包装: 2,500
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 1.8V
输入电压: 3 V ~ 25 V
PWM 型: 电流模式
频率 - 开关: 1.25MHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-MSOP
LT1767/LT1767-1.8/
LT1767-2.5/LT1767-3.3/LT1767-5
Monolithic 1.5A, 1.25MHz
Step-Down Switching Regulators
FEATURES
DESCRIPTIO
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1.5A Switch in a Small MSOP Package
Constant 1.25MHz Switching Frequency
High Power Exposed Pad (MS8E) Package
Wide Operating Voltage Range: 3V to 25V
High Efficiency 0.22 ? Switch
1.2V Feedback Reference Voltage
Fixed Output Voltages of 1.8V, 2.5V, 3.3V, 5V
2% Overall Output Tolerance
Uses Low Profile Surface Mount Components
Low Shutdown Current: 6 μ A
Synchronizable to 2MHz
Current Mode Loop Control
Constant Maximum Switch Current Rating at All Duty
Cycles*
The LT ? 1767 is a 1.25MHz monolithic buck switching
regulator. A high efficiency 1.5A, 0.22 ? switch is included
on the die together with all the control circuitry required to
complete a high frequency, current mode switching regu-
lator. Current mode control provides fast transient re-
sponse and excellent loop stability.
New design techniques achieve high efficiency at high
switching frequencies over a wide operating range. A low
dropout internal regulator maintains consistent perfor-
mance over a wide range of inputs from 24V systems to Li-
Ion batteries. An operating supply current of 1mA im-
proves efficiency, especially at lower output currents.
Shutdown reduces quiescent current to 6 μ A. Maximum
switch current remains constant at all duty cycles. Syn-
APPLICATIO S
chronization allows an external logic level signal to in-
crease the internal oscillator from 1.4MHz to 2MHz.
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DSL Modems
Portable Computers
Wall Adapters
Battery-Powered Systems
Distributed Power
The LT1767 is available in an 8-pin MSOP fused leadframe
package and a low thermal resistance exposed pad pack-
age. Full cycle-by-cycle short-circuit protection and ther-
mal shutdown are provided. High frequency operation
allows the reduction of input and output filtering compo-
nents and permits the use of chip inductors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
*Patent Pending
TYPICAL APPLICATIO
12V to 3.3V Step-Down Converter
95
Efficiency vs Load Current
D2
CMDSH-3
90
V IN = 10V
V OUT = 5V
C3
V IN
12V
2.2 μ F
CERAMIC
OPEN
OR
HIGH
= ON
BOOST
V IN
LT1767-3.3
SHDN
SYNC GND
V SW
FB
V C
C C
C2
0.1 μ F
D1
L1
5 μ H
OUTPUT
3.3V
1.2A*
C1
10 μ F
85
80
75
V IN = 5V
V OUT = 3.3V
1.5nF
UPS120
CERAMIC
R C
4.7k
70
0
0.2
0.4
0.6
0.8
1
1.2
1.4
LOAD CURRENT (A)
*MAXIMUM OUTPUT CURRENT IS SUBJECT TO THERMAL DERATING.
1767 TA01
1767 TA01a
sn1767 1767fas
1
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LT1767EMS8-2.5 功能描述:IC REG BUCK 2.5V 1.5A 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压(升压) 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型,TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT
LT1767EMS8-2.5#PBF 功能描述:IC REG BUCK 2.5V 1.5A 8MSOP 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:250 系列:- 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON(1.45x1) 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2
LT1767EMS8-2.5#TR 功能描述:IC REG BUCK 2.5V 1.5A 8MSOP 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
LT1767EMS8-2.5#TRPBF 功能描述:IC REG BUCK 2.5V 1.5A 8MSOP 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
LT1767EMS8-3.3 功能描述:IC REG BUCK 3.3V 1.5A 8MSOP 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