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| 型号： | LT8582IDKD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 22/36页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 3A 24DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 最高 42V |
| 输入电压： | 2.5 V ~ 22 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.5MHz |
| 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： | 24-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 24-DFN（7x4） |
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LT8582
APPLICATIONS INFORMATION
Single Inductor Inverting Topology
If there is a need to use just one inductor to generate a
negative output voltage whose magnitude is greater than
V IN , the single inductor inverting topology (shown in
Figure 12) can be used. Since the master and slave switches
are isolated by a Schottky diode, the current spike through
C1 will flow only through the slave switch, preventing the
current comparator, (A4 in the Block Diagram) from false
tripping. Output disconnect is inherently built into the
single inductor topology.
HOT-PLUG
High inrush currents associated with hot-plugging V IN can
largely be rejected with the use of an external PMOS. A
simple hot-plug controller can be designed by connecting
an external PMOS in series with V IN , with the gate of the
PMOS being driven by the GATE pin of the LT8582. The
GATE pin pull-down current is linearly proportional to the
SS voltage. Since the SS charge up time is relatively slow,
the GATE pin pull-down current will increase gradually,
thereby turning on the external PMOS slowly. Controlled
in this manner, the PMOS acts as an input current limiter
V IN
L1
D1
C1
D3
D2
V OUT < 0V
AND
|V OUT | > V IN
when V IN hot-plugs or ramps up sharply.
Likewise, when the PMOS is connected in series with the
output, inrush current into the output capacitor can be
SWA
SWB
R FBX
limited during a hot-plug event. To illustrate this, the circuit
C IN
100k
V IN
SHDN
PG
RT
CHx
LT8582 FBX
GATE
CLKOUT
V C
C OUT
in Figure 5 was reconfigured by adding a large 1500μF
capacitor to the output. An 18Ω resistive load was used
and C SS was increased to 10μF. Figure 13 shows the results
of hot-plugging this reconfigured circuit. Notice how the
R T
SYNC GND
SS
C F
R C
inductor current is well behaved.
C SS
C C
8582 F12
V IN
5V/DIV
Figure 12. Single Inductor Inverting Topology
V OUT1
10V/DIV
SS1
1V/DIV
I L1
2A/DIV
2s/DIV
8582 F13
Figure 13. V IN Hot-Plug Control. Inrush Current Is Well Controlled
8582f
22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT8584IFE#PBF | 制造商:Linear Technology 功能描述:IC BATT CELL BALANCE 16TSSOP 制造商:Linear Technology 功能描述:BATTERY BALANCER, 2.5V-5.3V, TSSOP-16, Supply Voltage Min:2.5V, Supply Voltage M |
| LT8610 | 制造商:LINER 制造商全称:Linear Technology 功能描述:42V, 2.5A Synchronous Step-Down Regulator |
| LT8610ABEMSE#PBF | 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
| LT8610AEMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 2.5A 16MSOP 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
| LT8610AHMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 2.5A 16MSOP 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
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