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参数资料
| 型号： | LT1765 |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 隔离反激式开关稳压9V输出 |
| 文件页数： | 1/20页 |
| 文件大小： | 247K |
| 代理商： | LT1765 |
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
Monolithic 3A, 1.25MHz
Step-Down Switching Regulator
1
sn1765 1765fas
I
DSL Modems
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Portable Computers
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Regulated Wall Adapters
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Battery-Powered Systems
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Distributed Power
, LTC and LT are registered trademarks of Linear Technology Corporation.
* Patent Pending
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3A Switch in a Thermally Enhanced 16-Lead
TSSOP or 8-Lead SO Package
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Constant 1.25MHz Switching Frequency
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Wide Operating Voltage Range: 3V to 25V
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High Efficiency 0.09
Switch
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1.2V Feedback Reference Voltage
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Uses Low Profile Surface Mount Components
I
Low Shutdown Current: 15
μ
A
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Synchronizable to 2MHz
I
Current Mode Loop Control
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Constant Maximum Switch Current Rating at
All Duty Cycles*
The LT
1765 is a 1.25MHz monolithic buck switching
regulator. A high efficiency 3A, 0.09
switch is included
on the die together with all the control circuitry required
to construct a high frequency, current mode switching
regulator. Current mode control provides fast transient
response and excellent loop stability.
New design techniques achieve high efficiency at high
switching frequencies over a wide operating voltage range.
A low dropout internal regulator maintains consistent
performance over a wide range of inputs from 24V
systems to Li-Ion batteries. An operating supply current
of 1mA improves efficiency, especially at lower output
currents. Shutdown reduces quiescent current to 15
μ
A.
Maximum switch current remains constant at all duty
cycles. Synchronization allows an external logic level
signal to increase the internal oscillator into the range of
1.6MHz to 2MHz.
Full cycle-by-cycle current control and thermal shutdown
are provided. High frequency operation allows the reduc-
tion of input and output filtering components and permits
the use of chip inductors.
BOOST
LT1765-3.3
V
IN
OUTPUT
3.3V
2.5A
INPUT
5V
1765 TA01
0.18
μ
F
2.2nF
UPS120
4.7
μ
F
CERAMIC
2.2
μ
F
CERAMIC
CMDSH-3
1.5
μ
H
V
SW
FB
SHDN
SYNC
ON
OFF
GND
V
C
Efficiency vs Load Current
5V to 3.3V Step-Down Converter
SWITCH CURRENT (A)
0
E
80
85
2.0
1765 TAO1a
75
70
0.5
1.0
1.5
90
V
IN
= 10V
V
OUT
= 5V
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
相关PDF资料 |
PDF描述 |
|---|---|
| LT1765-2.5 | Isolated Flyback Switching Regulator with 9V Output |
| LT1767-2.5 | Direct mounting on the PCB, Crimping connection, Discrete wire connectors; HRS No: 544-0063-6 00; No. of Positions: 15; Connector Type: Wire; Contact Gender: Male; Contact Spacing (mm): 2; Terminal Pitch (mm): 2; Termination Style: IDC; Current Rating(Amps)(Max.): 1; Contact Mating Area Plating: Tin; Operating Temperature Range (degrees C): -30 to 85; General Description: Housing; Straight; Direct PCB mounting; For AWG#26 |
| LT1767EMS8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1767EMS8-1.8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1767EMS8-2.5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1765-1.8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| LT1765-2.5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| LT1765-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| LT1765-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| LT1765EFE | 功能描述:IC REG BUCK ADJ 3A 16TSSOP 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 |
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