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參數(shù)資料
| 型號： | LT3021ES8-1.2 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
| 中文描述： | 1.2 V FIXED POSITIVE LDO REGULATOR, 0.285 V DROPOUT, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 235K |
| 代理商： | LT3021ES8-1.2 |
8
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
3021fa
BLOCK DIAGRA
SHUTDOWN
–
ERROR AMP
+
–
NO-LOAD
RECOVERY
+
CURRENT
GAIN
THERMAL
SHUTDOWN
R3
R2
R1
3021
BD
D1
Q1
D2
Q2
Q3
IN
(12, 14/8)
OUT
(3,4/2)
OUT SENSE
(7/3)
NOTE:
FOR LT3021 ADJUST PIN (7/3) IS CONNECTED TO
THE ADJUST PIN, R1 AND R2 ARE EXTERNAL.
FOR LT3021-1.X PIN (7/3) IS CONNECTED TO THE
OUTPUT SENSE PIN, R1 AND R2 ARE INTERNAL.
GND
(8,10,17/4,6)
ADJ
(7/3)
SHDN
(9/5)
200mV
212mV
BIAS CURRENT
AND
REFERENCE
GENERATOR
FIXED
V
OUT
1.2V
1.5V
1.8V
R1
20k
20k
20k
R2
100k
130k
160k
25k
PIU
OUT (Pins 3, 4/Pin 2):
These pins supply power to the load.
Use a minimum output capacitor of 3.3
μ
F to prevent oscil-
lations. Applications with large load transients require larger
output capacitors to limit peak voltage transients. See the
Applications Information section for more information on
output capacitance and reverse output characteristics.
SENSE (Pin 7/Pin 3, Fixed Voltage Device Only):
This pin
is the sense point for the internal resistor divider. It should
be tied directly to the OUT pins (1, 2) for best results.
ADJ (Pin 7/Pin 3):
This pin is the inverting terminal to the
error amplifier. Its typical input bias current of 20nA flows
out of the pin (see curve of ADJ Pin Bias Current vs
Temperature in the Typical Performance Characteristics).
The ADJ pin reference voltage is 200mV (referred to GND).
AGND (Pin 8/Pin 4):
Ground.
PGND (Pins 10, 17/Pin 6):
Ground.
SHDN (Pin 9/Pin 5):
The SHDN pin puts the LT3021 into
a low power state. Pulling the SHDN pin low turns the
output off. Drive the SHDN pin with either logic or an open
collector/drain device with a pull-up resistor. The pull-up
resistor supplies the pull-up current to the open collector/
drain logic, normally several microamperes, and the SHDN
pin current, typically 2.5
μ
A. If unused, connect the SHDN
pin to V
IN
. The LT3021 does not function if the SHDN pin
is not connected.
IN (Pins 12, 14/Pin 8):
These pins supply power to the
device. The LT3021 requires a bypass capacitor at IN if it
is more than six inches away from the main input filter
capacitor. The output impedance of a battery rises with fre-
quency, so include a bypass capacitor in battery-powered
circuits. A bypass capacitor in the range of 3.3
μ
F to 10
μ
F
suffices. The LT3021 withstands reverse voltages on the
IN pin with respect to ground and the OUT pin. In the case
of a reversed input, which occurs if a battery is plugged in
backwards, the LT3021 acts as if a diode is in series with
its input. No reverse current flows into the LT3021 and no
reverse voltage appears at the load. The device protects itself
and the load.
EXPOSED PAD (Pin 17, DH16 Package Only):
Ground.
Solder Pin 17 to the PCB ground. Connect directly to Pins
5, 8, 10 for best performance.
NC (Pins 1, 2, 5, 6, 11, 15, 16/Pins 1, 7)
(DH Package/S8 Package)
(DH Package/S8 Package)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3021ES8-1.5 | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
| LT3021EDH-1.2 | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
| LT3021EDH-1.5 | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
| LT3021EDH-1.8 | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
| LT3021ES8-1.8 | 500mA, Low Voltage, Very Low Dropout Linear Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3021ES8PBF | 制造商:Linear Technology 功能描述:LDO Regulator Adj. 500mA 0.9-10V SOIC8 |
| LT3021IS8-1.8#PBF | 功能描述:IC REG LDO 1.8V .5A 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:800 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.7V @ 4A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:4A 電流 - 限制（最?。?4.2A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-6，D²Pak（5 引線+接片），TO-263BA 供應(yīng)商設(shè)備封裝:TO-263-5 包裝:帶卷 (TR) 其它名稱:AP1184K525L-13AP1184K525LDITR |
| LT3021IS8-1.8#TRPBF | 功能描述:IC REG LDO 1.8V .5A 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最小）:300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應(yīng)商設(shè)備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6 |
| LT3022 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, Low Noise, Negative Linear Regulator |
| LT3022EDHC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A, 0.9V to 10V, Very Low Dropout Linear Regulator |
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