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参数资料
| 型号： | LTC3785EUF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, PLASTIC, MO-220WGGD, QFN-24 |
| 文件页数： | 15/20页 |
| 文件大小： | 275K |
| 代理商： | LTC3785EUF |
LTC3785
3785fc
The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at TA = 25°C. VIN = ISVOUT = VDRV = VBST1 = VBST2 = 3.6V, RT = 49.9k, RILSET = 59k.
elecTrical characTerisTics
Li-Ion to 3.3V Efficiency
vs Load Current
Two Li-Ion to 7V Efficiency
vs Load Current
Li-Ion/9V to 5V VOUT Efficiency
vs Load Current
Burst Mode Ripple
Line Transient Response
VOUT Load Transient
TA = 25°C, unless otherwise noted.
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 LTC3785E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3785I is guaranteed
Typical perForMance characTerisTics
LOAD CURRENT (A)
0.0001
EFFICIENCY
(%)
60
80
100
1
3785 G01
40
20
50
70
90
30
10
0
0.001
0.01
0.1
10
VIN = 4.2V
VIN = 3.6V
VIN = 3V
Burst Mode
OPERATION
FIXED
FREQUENCY
MOSFET Si7940
L = 4.7H WURTH WE-PD
fOSC = 500kHz
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
40
EFFICIENCY
(%)
50
60
70
80
10
3785 G02
30
20
10
0
90
100
VIN = 8.4V
VIN = 7.2V
VIN = 5.4V
MOSFET Si7940
L = 5.6H MSS1260
fOSC = 430kHz
Burst Mode
OPERATION
FIXED
FREQUENCY
LOAD CURRENT (A)
0.0001
0.001
0.01
0.1
1
40
EFFICIENCY
(%)
50
60
70
80
10
3785 G03
30
20
10
0
90
100
VIN = 9V
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
MOSFET Si7940
L = 5.6H MSS1260
fOSC = 430kHz
Burst Mode
OPERATION
FIXED
FREQUENCY
VOUT
50mV/DIV
AC
COUPLED
INDUCTOR
CURRENT
1A/DIV
5s/DIV
VOUT = 3.3V
COUT = 100F
3785 G04
VOUT
500mV/
DIV
VIN
3V TO
8.5V
500s/DIV
ILOAD = 300mA
VOUT = 5V
COUT = 100F
3785 G05
VOUT
200mV/
DIV
ILOAD
10mA TO 2A
100s/DIV
VIN = 3.6V
VOUT = 3.3V
COUT = 100F
3785 G06
to meet performance specifications over the full –40°C to 125°C operating
junction temperature range.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Current measurements are performed when the outputs are not
switching.
Note 5: The IC is tested in a feedback loop to make the measurement.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
BG1, BG2 Rise Time
CLOAD = 3300pF (Note 3)
20
ns
TG1, TG2 Fall Time
CLOAD = 3300pF (Note 3)
20
ns
BG1, BG2 Fall Time
CLOAD = 3300pF (Note 3)
20
ns
Buck Driver Nonoverlap Time
TG1 to BG1
100
ns
Boost Driver Nonoverlap Time
TG2 to BG2
100
ns
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3785EUF#PBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LTC3785EUF#TRPBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3785EUF-1#PBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3785EUF-1#TRPBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3785EUFPBF | 制造商:Linear Technology 功能描述:10V Synch Buck-Boost Controller LTC3785 |
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