参数资料
型号: LT3462ES6#TRPBF
厂商: Linear Technology
文件页数: 1/8页
文件大小: 0K
描述: IC REG INV ADJ 0.25A TSOT23-6
标准包装: 2,500
类型: 反相
输出类型: 可调式
输出数: 1
输出电压: 可调至 -38V
输入电压: 2.5 V ~ 16 V
PWM 型: 电流模式
频率 - 开关: 1.2MHz
电流 - 输出: 250mA
同步整流器:
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
LT3462/LT3462A
Inverting 1.2MHz/2.7MHz
DC/DC Converters with
Integrated Schottky in ThinSOT
FEATURES
DESCRIPTIO
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Integrated Schottky Rectifier
Fixed Frequency 1.2MHz/2.7MHz Operation
Very Low Noise: 1mV P-P Output Ripple
Low V CESAT Switch: 270mV at 250mA
–5V at 100mA from 5V Input
–12V at 30mA from 3.3V Input
Low Input Bias Current GND Based FB Input
Low Impedance (40 ? ) 1.265V Reference Output
High Output Voltage: Up to – 38V
Wide Input Range: 2.5V to 16V
Uses Tiny Surface Mount Components
Low Shutdown Current: <10 μ A
Low Profile (1mm) SOT-23 (ThinSOT TM ) Package
The LT ? 3462/LT3462A are general purpose fixed fre-
quency current mode inverting DC/DC converters. Both
devices feature an integrated Schottky and a low V CESAT
switch allowing a small converter footprint and lower parts
cost. The LT3462 switches at 1.2MHz while the LT3462A
switches at 2.7MHz. These high speeds enable the use of
tiny, low cost and low height capacitors and inductors.
The LT3462/LT3462A operate in a dual inductor inverting
topology that filters both the input and output currents.
Very low output voltage ripple approaching 1mV P-P can be
achieved when ceramic capacitors are used. Fixed fre-
quency switching ensures a clean output free from low
frequency noise typically present with charge pump solu-
APPLICATIO S
tions. The 40V switch allows a V IN to V OUT differential of
up to 38V for dual inductor topologies.
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CCD Bias
LCD Bias
GaAs FET Bias
General Purpose Negative Voltage Supply
Both devices provide a low impedance 1.265V reference
output to supply the feedback resistor network. A ground
referenced, high impedance FB input allows high feedback
resistor values without compromising output accuracy.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation
TYPICAL APPLICATIO
5V to –5V, 100mA Inverting DC/DC Converter
The LT3462/LT3462A are available in a 6-lead SOT-23
package.
Efficiency
V IN
5V
22 μ H
1 μ F
22 μ H
75
T A = 25°C
V IN = 5V
V OUT
70
SW
D
267k
22pF
–5V
100mA
V IN = 3.3V
1 μ F
V IN FB
LT3462A
68.1k
10 μ F
65
SDREF
GND
60
3462 TA01
55
0
20
40
60
80
100
LOAD CURRENT (mA)
3462 TA01b
3462af
1
相关PDF资料
PDF描述
LT3462ES6#TR IC REG INV ADJ 0.25A TSOT23-6
LT3462AES6#TRPBF IC REG INV ADJ 0.25A TSOT23-6
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