参数资料
型号: LT3028IDHC#TRPBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC REG LDO ADJ .5A/.1A 16-DFN
产品培训模块: More Information on LDOs
标准包装: 2,500
稳压器拓扑结构: 正,可调式
输出电压: 1.22 V ~ 20 V
输入电压: 1.8 V ~ 20 V
电压 - 压降(标准): 0.32V @ 500mA,0.3V @ 100mA
稳压器数量: 2
电流 - 输出: 500mA,100mA
电流 - 限制(最小): 520mA,110mA
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(5x3)
包装: 带卷 (TR)
LT3028
Dual 100mA/500mA
Low Dropout, Low Noise,
Micropower Regulators with
Independent Inputs
FEATURES
DESCRIPTIO
Low Noise: 20 μ V RMS (10Hz to 100kHz)
Low Quiescent Current: 30 μ A/Output
Independent Inputs
Wide Input Voltage Range: 1.8V to 20V
Output Current: 100mA/500mA
Very Low Shutdown Current: <0.1 μ A
Low Dropout Voltage: 300mV/320mV at
100mA/500mA
Adjustable Outputs from 1.22V to 20V
Stable with as Low as 1 μ F/3.3 μ F Output Capacitor
Stable with Aluminum, Tantalum or
Ceramic Capacitors
Reverse-Battery Protected
No Protection Diodes Needed
Overcurrent and Overtemperature Protected
Tracking/Sequencing Capability
Thermally Enhanced 16-Lead TSSOP and 16-Lead
(5mm × 3mm) DFN Packages
The LT ? 3028 is a dual, micropower, low noise, low drop-
out regulator with independent inputs. With an external
0.01 μ F bypass capacitor, output noise is a low 20 μ V RMS
over a 10Hz to 100kHz bandwidth. Designed for use in
battery-powered systems, the low 30 μ A quiescent current
per output makes it an ideal choice. In shutdown, quies-
cent current drops to less than 0.1 μ A. Shutdown control
is independent for each output, allowing for flexibility in
power management. The device is capable of operating
over an input voltage range of 1.8V to 20V. Output 1 can
supply 500mA of output current with a dropout voltage of
320mV. The device can supply 100mA of output current
from Output 2 with a dropout voltage of 300mV. Quiescent
current is well controlled in dropout.
The LT3028 regulator is stable with output capacitors as
low as 1 μ F for the 100mA output and 3.3 μ F for the 500mA
output. Small ceramic capacitors can be used without the
series resistance required by other regulators.
APPLICATIO S
■ Cellular Phones
■ Pagers
■ Battery-Powered Systems
■ Frequency Synthesizers
■ Wireless Modems
Internal protection circuitry includes reverse-battery pro-
tection, current limiting and thermal limiting protection.
The device is available as an adjustable device with a 1.22V
reference voltage. The LT3028 regulator is available in the
thermally enhanced 16-lead TSSOP and 16-lead, low
profile (5mm × 3mm × 0.75mm) DFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Tracking/Sequencing Power Supplies
Protected by U.S. Patents including 6118263, 6144250.
TYPICAL APPLICATIO
3.3V/2.5V Low Noise Regulators
10Hz to 100kHz Output Noise
V IN1
3.7V TO
20V
1 μ F
IN1
SHDN1
OUT1
BYP1
0.01 μ F
422k
10 μ F
3.3V AT 500mA
20 μ V RMS NOISE
ADJ1
LT3028
249k
V OUT
100 μ V/DIV
20 μ V RMS
V IN2
2.9V TO
20V
1 μ F
IN2
SHDN2
OUT2
BYP2
ADJ2
0.01 μ F
261k
10 μ F
2.5V AT 100mA
20 μ V RMS NOISE
3028 TA01b
GND
249k
3028 TA01a
3028f
1
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