参数资料
| 型号： | LTC3026EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.5A 10-DFN |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 121 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.4 V ~ 2.6 V |
| 输入电压： | 1.14 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.1V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3026
OPERATION
T A = 25°C 100μs/DIV
The LDO provides a high accuracy output capable of
supplying 1.5A of output current with a typical dropout
voltage of only 100mV. A single ceramic capacitor as
small as 10μF is all that is required for output bypassing.
A low reference voltage allows the LTC3026 output to be
programmed to much lower voltages than available in
common LDOs (range of 0.4V to 2.6V).
The devices also include current limit and thermal overload
protection, and will survive an output short-circuit indefi-
nitely. The fast transient response of the follower output
stage overcomes the traditional trade-off between dropout
voltage, quiescent current and load transient response
inherent in most LDO regulator architectures, see Figure 1.
SHDN
OUT
PG
HI
LO
1.5V
0V
1.5V
0V
3026 F02
R OUT = 1
V IN = 1.7V
V B = 5V
Figure 2. Soft-Start with Boost Disable
I OUT
1.5A
0mA
Adjustable Output Voltage
V OUT = 1.5V
100μs/DIV
V OUT = 0.4V ? 1 +
R1 ? ?
V OUT
OUT
AC 20mV/DIV
3026 F01
C OUT = 10μF
V IN = 1.7V
V B = 5V
Figure 1. Output Load Step Response
The LTC3026 also includes a soft-start feature to prevent
excessive current flow at V IN during start-up. When the
LDO is enabled, the soft-start circuitry gradually increases
the LDO reference voltage from 0V to 0.4V over a period
of approximately 200μs, see Figure 2.
The output voltage is set by the ratio of two external resis-
tors as shown in Figure 3. The device servos the output
to maintain the ADJ pin voltage at 0.4V (referenced to
ground). Thus, the current in R1 is equal to 0.4V/R1. For
good transient response, stability and accuracy the current
in R1 should be at least 80μA, thus, the value of R1 should
be no greater than 5k. The current in R2 is the current in
R1 plus the ADJ pin bias current. Since the ADJ pin bias
current is typically <10nA it can be ignored in the output
voltage calculation. The output voltage can be calculated
using the formula in Figure 3. Note that in shutdown the
output is turned off and the divider current will be zero
once C OUT is discharged.
? R2 ?
?
LTC3026 R2
ADJ C OUT
R1
GND
3026 F03
Figure 3. Programming the LTC3026
3026ff
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3026EDDTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A Low Input Voltage VLDO Linear Regulator |
| LTC3026EDDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A Low Input Voltage VLDO Linear Regulator |
| LTC3026EMSE | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0.4V to 2.6V 1.5A 10-Pin MSOP EP |
| LTC3026EMSE#PBF | 功能描述:IC REG LDO ADJ 1.5A 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
| LTC3026EMSE#PBF | 制造商:Linear Technology 功能描述:Linear Voltage Regulator IC |
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