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| 型号： | LT3461AES6#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.25A TSOT23-6 |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.26 V ~ 38 V |
| 输入电压： | 2.5 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 3MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-6 |
LT3461/LT3461A
PI FU CTIO S
SW (Pin 1): Switch Pin. Connect inductor here. Minimize
trace at this pin to reduce EMI.
GND (Pin 2): Ground Pin. Tie directly to local ground
plane.
FB (Pin 3): Feedback Pin. Reference voltage is 1.255V.
Connect resistor divider tap here. Minimize trace area at
FB. Set V OUT according to V OUT = 1.255V (1 + R1/R2).
BLOCK DIAGRA
SHDN (Pin 4): Shutdown Pin. Tie to 1.5V or higher to
enable device; 0.4V or less to disable device. Also func-
tions as soft-start. Use RC filter (47k, 47nF typ) as shown
in Figure 1.
V OUT (Pin 5): Output Pin. Connect to resistor divider. Put
capacitor close to pin and close to GND plane.
V IN (Pin 6): Input Supply Pin. Must be locally bypassed.
V IN 6
V OUT
R1 (EXTERNAL)
1.255V
REFERENCE
+
–
A1
R C
COMPARATOR
–
A2
+
R
S
Q
DRIVER
1
Q1
SW
5 V OUT
FB
R2 (EXTERNAL)
3 FB
C C
∑
+
0.1 ?
–
SHUTDOWN
R S (EXTERNAL)
4 SHDN
RAMP
GENERATOR
C S (EXTERNAL)
3MHz*
R S , C S OPTIONAL SOFT-START COMPONENTS
OSCILLATOR
*LT3461 IS 1.3MHz
2
GND
3461a F02
Figure 1. Block Diagram
OPERATIO
The LT3461/LT3461A uses a constant frequency, current
mode control scheme to provide excellent line and load
regulation. Operation can be best understood by referring
to the block diagram in Figure 1. At the start of each
oscillator cycle, the SR latch is set, which turns on the
power switch Q1. A voltage proportional to the switch
current is added to a stabilizing ramp and the resulting
Layout Hints
The high speed operation of the LT3461/LT3461A de-
mands careful attention to board layout. You will not get
advertised performance with careless layout. Figure 2
shows the recommended component placement.
C1
sum is fed into the positive terminal of the PWM compara-
tor A2. When this voltage exceeds the level at the negative
input of A2, the SR latch is reset turning off the power
switch. The level at the negative input of A2 is set by the
error amplifier A1, and is simply an amplified version of
GND
R2
L1
V IN
the difference between the feedback voltage and the
reference voltage of 1.255V. In this manner, the error
amplifier sets the correct peak current level to keep the
output in regulation. If the error amplifier’s output in-
R1
C3
C2
3461a F03
V OUT
SHUTDOWN
creases, more current is delivered to the output; if it
Figure 2. Suggested Layout
decreases, less current is delivered.
3461af
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3461ES6 | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.5V to 16V 6-Pin TSOT-23 |
| LT3461ES6#PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 1.3MHZ TSOT-23- 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 1.3MHZ, TSOT-23- 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 1.3MHZ, TSOT-23-6, Primary Input Voltage:16V, No. of Outputs:1, Output Current:420mA, No. of Pins:6, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, cut tape 300mA, 1.3MHz Boost Cnvtr w/Internal Schottky |
| LT3461ES6#TR | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3461ES6#TRM | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3461ES6#TRMPBF | 功能描述:IC REG BOOST ADJ 0.25A TSOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 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:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
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