- 您现在的位置：买卖IC网 > PDF目录13851 > LT1765EFE-2.5#TR (Linear Technology)IC REG BUCK 2.5V 3A 16TSSOP PDF资料下载
参数资料
| 型号： | LT1765EFE-2.5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 2.5V 3A 16TSSOP |
| 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： | 2.5V |
| 输入电压： | 3 V ~ 25 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.25MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TSSOP-EP |
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
APPLICATIONS INFORMATION
CMDSH-3
0.18μF
REMOVABLE
INPUT
MBRS330T3*
83k
V IN
BOOST
LT1765-3.3
V SW
5μH
3.3V, 2A
ALTERNATE
SUPPLY
SHDN
SYNC GND
V C
FB
28.5k
2.2μF
2.2nF
B220A
4.7μF
1765 F09
* ONLY REQUIRED IF ADDITIONAL LOADS ON THE INPUT CAN SINK >10mA
Figure 9. Dual Source Supply with 6μA Reverse Leakage
C2
D2
CMDSH-3
Dual Output Converter
The circuit in Figure 11 generates both positive and negative
0.18μF
L1
5V outputs with a single piece of magnetics. The two induc-
INPUT
12V
C3
2.2μF
+
BOOST
V IN V SW
LT1765-5
SHDN FB
D1
5μH
C1
100μF
OUTPUT
5V
2.5A
tors shown are actually just two windings on a standard
B H Electronics inductor. The topology for the 5V output
is a standard buck converter. The –5V topology would be
SYNC GND V C
a simple ?yback winding coupled to the buck converter
C C
330pF
Q1
C SS
R3 15nF
2k
1765 F10
if C4 were not present. C4 creates a SEPIC (single-ended
primary inductance converter) topology which improves
R4
regulation and reduces ripple current in L1. Without C4,
47k
D1: B220A
Q1: 2N3904
the voltage swing on L1B compared to L1A would vary
due to relative loading and coupling losses. C4 provides a
Figure 10. Buck Converter with Adjustable Soft Start
low impedance path to maintain an equal voltage swing in
L1B, improving regulation. In a ?yback converter, during
( R 4 )( C SS OUT )
RiseTime =
)( V
( V BE )
switch on time, all the converter’s energy is stored in L1A
only, since no current ?ows in L1B. At switch off, energy
is transferred by magnetic coupling into L1B, powering
Using the values shown in Figure 10,
the –5V rail. C4 pulls L1B positive during switch on time,
causing current to ?ow, and energy to build in L1B and
RiseTime =
(47 ? 10 3 )(15 ? 10 – 9 )(5)
0 . 7
= 5 ms
C4. At switch off, the energy stored in both L1B and C4
supply the –5V rail. This reduces the current in L1A and
changes L1B current waveform from square to triangular.
The ramp is linear and rise times in the order of 100ms are
possible. Since the circuit is voltage controlled, the ramp
For details on this circuit, including maximum output cur-
rents, see Design Note 100
rate is unaffected by load characteristics and maximum
output current is unchanged. Variants of this circuit can
be used for sequencing multiple regulator outputs.
1765fd
15
相关PDF资料 |
PDF描述 |
|---|---|
| HBM28DRKH | CONN EDGECARD 56POS DIP .156 SLD |
| MAX6715AUTLTD5+T | IC SUPERVISOR MPU SOT23-6 |
| GSM28DRST | CONN EDGECARD 56POS DIP .156 SLD |
| SC73-151 | INDUCTOR SMD 150UH 0.40A 1KHZ |
| EMM22DRKS | CONN EDGECARD 44POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1765EFE-3.3 | 功能描述:IC REG BUCK 3.3V 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 |
| LT1765EFE-3.3#PBF | 功能描述:IC REG BUCK 3.3V 3A 16TSSOP 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 |
| LT1765EFE-3.3#PBF | 制造商:Linear Technology 功能描述:Switching Regulator IC |
| LT1765EFE-3.3#TR | 功能描述:IC REG BUCK 3.3V 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 |
| LT1765EFE-3.3#TRPBF | 功能描述:IC REG BUCK 3.3V 3A 16TSSOP RoHS:是 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 |
发布紧急采购，3分钟左右您将得到回复。