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參數(shù)資料
| 型號： | LTC3442 |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation |
| 中文描述： | 微功率同步降壓升壓與自動突發(fā)模式的DC / DC轉(zhuǎn)換器操作 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 332K |
| 代理商： | LTC3442 |
LTC3442
3
3442f
V
IN
(V)
2.5
%
4.0
5.0
3442 G05
3.0
3.5
4.5
8
6
4
2
0
–2
–4
–6
–8
V
OUT
= 3.3V
1MHz
3442 G01
LOAD (mA)
0.1
E
1
10
100
1000
10000
90
60
100
80
70
50
40
30
20
Burst Mode
OPERATION
FIXED FREQUENCY
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 2.5V
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 2.5V
V
= 3.3V
600kHz
FREQUENCY (MHz)
0.50
%
0.75
1.00
1.25
1.50
3442 TA01b
1.75
15
10
5
0
–5
–10
2.00
V
IN
= 5V
V
OUT
SHORTED
V
OUT
DROPS 10%
PARAMETER
Burst Current Ratio
Input Current Ratio
R
LIM
Threshold
SHDN/SS Threshold
CONDITIONS
Ratio of I
OUT
to I
BURST
Ratio of I
IN
to I
RLIM
, I
IN
= 0.5A
MIN
TYP
20,000
70,000
0.95
0.7
2.2
0.01
MAX
UNITS
V
V
V
When IC is Enabled
When EA is at Max Boost Duty Cycle
V
SHDN
= 5.5V
●
0.4
1.4
2.4
1
SHDN/SS Input Current
μ
A
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= V
OUT
= 3.6V, R
T
= 64.9k, unless otherwise noted.
The
●
denotes the specifications which apply over the full operating
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC3442E is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over –40
°
C to 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
Current Measurements are performed when the outputs are not
switching.
Note 4:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125
°
C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
TYPICAL PERFOR U
Efficiency vs Load
Efficiency and Power Loss vs Load
Efficiency vs Frequency
Input Current Mirror Linearity
Average Input Current Limit
vs V
IN
(Normalized)
LOAD CURRENT (mA)
0.1
E
1
10
100
1000
10000
3442 G02
90
60
40
30
20
100
80
70
50
10
1
0.1
1000
100
P
Burst Mode
OPERATION
FIXED FREQUENCY
POWER LOSS
V
IN
= 3.6V
V
OUT
= 3.3V
FREQUENCY (kHz)
400
E
2000
3442 G03
800
1200
1600
600
1000
1400
1800
96
94
92
90
88
86
84
82
80
WITHOUT SCHOTTKY DIODES
WITH SCHOTTKY DIODES
V
IN
= 3.6V
V
OUT
= 3.3V
INPUT CURRENT (A)
0
1.00
0.90
0.80
0.60
0.70
0.50
0.40
0.30
0.20
0.10
0.00
.40
3442 G04
.10
.05
.15
.25
.35
.45
.20
.30
.50
R
L
V
IN
= 3.6V
V
OUT
= 3.3V
R
LIM
= 133k
(T
A
= 25
°
C unless otherwise specified).
Average Input Current Limit
vs Frequency (Normalized)
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PDF描述 |
|---|---|
| LTC3442EDE | Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3442EDE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.4V to 5.5V 12-Pin DFN EP |
| LTC3442EDE#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3442EDE#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.4V to 5.5V 12-Pin DFN EP T/R |
| LTC3442EDE#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3443 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter |
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