参数资料
| 型号： | LT3493IDCB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.2A 6DFN |
| 标准包装： | 500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.78 V ~ 34.2 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 750kHz |
| 电流 - 输出： | 1.2A |
| 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： | 6-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 6-DFN-EP（2x3） |
LT3493
PIN FUNCTIONS
FB (Pin 1): The LT3493 regulates its feedback pin to
780mV. Connect the feedback resistor divider tap to this
pin. Set the output voltage according to V OUT = 0.78V ?
(1 + R1/R2). A good value for R2 is 10k.
GND (Pin 2): Tie the GND pin to a local ground plane
below the LT3493 and the circuit components. Return the
feedback divider to this pin.
BOOST (Pin 3): The BOOST pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch.
SW (Pin 4): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
BLOCK DIAGRAM
V IN (Pin 5): The V IN pin supplies current to the LT3493’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
SHDN (Pin 6): The SHDN pin is used to put the LT3493 in
shutdown mode. Tie to ground to shut down the LT3493.
Tie to 2.3V or more for normal operation. If the shutdown
feature is not used, tie this pin to the V IN pin. SHDN also
provides a soft-start function; see the Applications Infor-
mation section.
Exposed Pad (Pin 7): The Exposed Pad must be soldered
to the PCB and electrically connected to ground. Use a
large ground plane and thermal vias to optimize thermal
performance.
V IN
5
V IN
C2
INT REG
AND
UVLO
ON OFF
R3
SLOPE
COMP
R
Q
BOOST
3
D2
C4
6
SHDN
OSC
S
Q
DRIVER
Q1
SW
4
C3
L1
V OUT
FREQUENCY
D1
C1
FOLDBACK
V C
g m
780mV
2
GND
R2
1
FB
R1
3493 BD
3493fb
6
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| LT3495EDDB-1#TRMPBF | IC REG BOOST ADJ 0.35A 10DFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3493IDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3494 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Noise Boost Converters with Output Disconnect |
| LT3494A | 制造商:LINER 制造商全称:Linear Technology 功能描述:20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN |
| LT3494AEDDB | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Noise Boost Converters with Output Disconnect |
| LT3494AEDDB#PBF | 制造商:Linear Technology 功能描述:BOOST 2.3 - 16V 0.35A 40V 制造商:Linear Technology 功能描述:BOOST, 2.3 - 16V, 0.35A, 40V, 20QFN |
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