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參數(shù)資料
| 型號(hào)： | LTC3672BEDC-1#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 3/12頁 |
| 文件大小： | 172K |
| 描述： | IC REG TRPL BCK/LINEAR 8-DFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 拓?fù)洌?/td> | 降壓（降壓）同步（1），線性（LDO）（2） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 3 |
| 頻率 - 開關(guān)： | 2.25MHz |
| 電壓/電流 - 輸出 1： | 1.8V，400mA |
| 電壓/電流 - 輸出 2： | 1.2V，150mA |
| 電壓/電流 - 輸出 3： | 2.8V，150mA |
| 帶 LED 驅(qū)動(dòng)器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 2.9 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 8-DFN（2x2） |
| 包裝： | 帶卷 (TR) |
LTC3672B-1
3
3672B1f
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3672B-1 is guaranteed to meet performance speci cations
from 0癈 to 85癈. Speci cations over the 40癈 to 85癈 operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125癈 when overtemperature protection is active.
Continuous operation above the speci ed maximum operating junction
temperature may impair device reliability.
The ?/SPAN> denotes the speci cations which apply over the full operating
temperature range, otherwise speci cations are at T
A
= 25癈. V
IN
= 3.6V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
R
PD,BUCKOUT
BUCKOUT Pulldown Resistance in Shutdown V
ENALL
= 0V
10
k?/DIV>
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R
PD,SW
SW Pulldown Resistance in Shutdown
V
ENALL
= 0V
10
k?/DIV>
t
SS,BUCK
Soft-Start Time
0.2
ms
LDO Regulator 1: V
IN1
= 1.8V Unless Otherwise Noted
V
LDO1
Regulated Output Voltage
LDO1 Output, I
LDO1
= 1mA
?/DIV>
1.17 1.2 1.23
V
Line Regulation
with Respect to V
IN
with Respect to V
IN1
I
LDO1
= 1mA
V
IN
= 3V to 5.5V, V
IN1
= 1.8V
V
IN
= 3.6V, V
IN1
= 1.7V to 1.9V
0.05
1
mV/V
mV/V
Load Regulation
I
LDO1
= 1mA to 150mA
0.05
mV/mA
Available Output Current
150
mA
Short-Circuit Output Current
347
mA
V
DROP1
Dropout Voltage (Note 6)
I
LDO1
= 150mA
484 570 mV
t
SS,LDO1
Soft-Start Time
0.3
ms
R
PD,LDO1
Output Pulldown Resistance in Shutdown
10
k?/DIV>
LDO Regulator 2
V
LDO2
Regulated Output Voltage
LDO2 Output, I
LDO2
= 1mA
?SPAN class="pst LTC3672BEDC-1-TRPBF_2465726_4"> 2.73 2.8 2.87
V
Line Regulation with Respect to V
IN
I
LDO2
= 1mA, V
IN
= 3V to 5.5V
1
mV/V
Load Regulation
I
LDO2
= 1mA to 150mA
0.1
mV/mA
Available Output Current
150
mA
Short-Circuit Output Current
453
mA
V
DROP2
Dropout Voltage (Note 6)
I
LDO2
= 150mA
188 250 mV
t
SS,LDO2
Soft-Start Time
0.1
ms
R
PD,LDO2
Output Pulldown Resistance in Shutdown
10
k?/DIV>
Note 4: Dynamic supply current is higher due to the gate charge delivered
to the buck regulators internal MOSFET switches at the switching
frequency.
Note 5: The current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the speci ed maximum speci ed pin current rating may result in
device degradation or failure.
Note 6: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a speci ed output current. When LDO1 is
in dropout, its output voltage will be equal to: V
IN1
V
DROP1
. When LDO2
is in dropout, its output voltage will be equal to: V
IN
V
DROP2
.
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