参数资料
| 型号： | LT3029IDE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 16DFN |
| 产品培训模块： | LT3029 - 500mA, Dual Output, 1.2 ~ 19.5V, Linear Regulator |
| 标准包装： | 91 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.215 V ~ 19.5 V |
| 输入电压： | 1.8 V ~ 20 V |
| 电压 - 压降（标准）： | 0.3V @ 500mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 520mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（4x3） |
| 包装： | 管件 |
LT3029
APPLICATIONS INFORMATION
The LT3029 is a dual 500mA/500mA low dropout regulator
LT3029
with independent inputs, micropower quiescent current
OUT1/OUT2
V OUT
+ ( I ADJ ) ( R2 )
V OUT = 1.215V ? 1 +
andshutdown.Thedevicesuppliesupto500mAfromeach
channel’s output at a typical dropout voltage of 300mV.
The two regulators share a common GND pin and are
thermally coupled. However, the two inputs and outputs of
V IN
IN1/IN2
ADJ1/ADJ2
GND
R2
R1
C
? R2 ?
?
? R1 ?
V ADJ = 1.215V
I ADJ = 30nA AT 25 ° C
OUTPUT RANGE = 1.215V TO 19.5V
the LT3029 operate independently. Each channel can be
shut down independently, but a thermal shutdown fault
on either channel shuts off the output on both channels.
The addition of a 10nF reference bypass capacitor lowers
output voltage noise to 20μV RMS over a 10Hz to 100kHz
bandwidth. Additionally, the reference bypass capacitor
improves transient response of the regulator, lowering
the settling time for transient load conditions. The low
operating quiescent current (55μA per channel) drops to
less than 1μA in shutdown. In addition to the low quies-
cent current, the LT3029 regulator incorporates several
protection features that make it ideal for use in battery-
powered systems. Most importantly, the device protects
itself against reverse input voltages. Current limiting with
foldback necessitates a minimum load current of 20μA
3029 F01
Figure 1. Adjustable Operation
Linear Technology tests and speci?es each LT3029 channel
with its ADJ pin tied to the corresponding OUT pin for a
1.215V output voltage. Speci?cations for output voltages
greater than 1.215V are proportional to the ratio of desired
output voltage to 1.215V:
V OUT
1.215V
For example, load regulation on either output for an output
current change of 1mA to 500mA is typically –2.5mV at
V OUT = 1.215V. At V OUT = 2.5V, load regulation is:
for input/output voltage differentials of more than 10V to
keep the output regulated.
2.5V
1.215V
? ( ? 2.5mV) = ? 5.14mV
Adjustable Operation
Each of the LT3029’s channels has an output voltage range
of 1.215V to 19.5V. Figure 1 illustrates that output voltage
Table 1 shows 1% resistor divider values for some com-
mon output voltages with a resistor divider current of
approximately 5μA.
is set by the ratio of two external resistors. The device
regulates the output to maintain the corresponding ADJ
pin voltage at 1.215V referenced to ground. R1’s current
Table 1. Output Voltage Resistor Divider Values
V OUT R1
(V) (k)
R2
(k)
equals 1.215V/R1. R2’s current equals R1’s current plus
the ADJ pin bias current. The ADJ pin bias current, 30nA at
25°C, ?ows through R2 into the ADJ pin. Use the formula
in Figure 1 to calculate output voltage. Linear Technology
recommends that the value of R1 be less than 243k to
minimize errors in the output voltage due to the ADJ pin bias
current. In shutdown, the output turns off and the divider
1.5
1.8
2.5
3
3.3
5
237
237
243
232
210
200
54.9
113
255
340
357
619
current is zero. Curves of ADJ Pin Voltage vs Temperature
and ADJ Pin Bias Current vs Temperature appear in the
Typical Performance Characteristics section.
3029fa
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3029IDETR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator |
| LT3029IDETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator |
| LT3029IMSE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator |
| LT3029IMSE#PBF | 功能描述:IC REG LDO ADJ .5A 16MSOP 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:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3029IMSE#TRPBF | 功能描述:IC REG LDO ADJ .5A 16MSOP 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:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
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