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| 型号： | LTC3446IDE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/20页 |
| 文件大小： | 283K |
| 描述： | IC REG TRPL BCK/LINEAR 14-DFN |
| 标准包装： | 91 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（2） |
| 功能： | 任何功能 |
| 输出数： | 3 |
| 频率 - 开关： | 2.25MHz |
| 电压/电流 - 输出 1： | 可调至0.8V，1A |
| 电压/电流 - 输出 2： | 可调至0.4V，300mA |
| 电压/电流 - 输出 3： | 可调至0.4V，300mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 0.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-DFN-EP（4x3） |
| 包装： | 管件 |
LTC3446
2
3446ff
pin conFiguraTion
absoluTe MaxiMuM raTings
V
IN
, LV
IN
to GND ......................................... 0.3V to 6V
MODESEL, ENBUCK, ENLDO1,
ENLDO2 to GND .......................................... 0.3V to 6V
BUCKFB to GND .......................................... 0.3V to 6V
LV
FB1
, LV
FB2
to GND .................................... 0.3V to 6V
I
TH
to GND ..... 0.3V to the Lesser of (V
IN
+ 0.3V) or 3V
SW to GND ......0.3V to the Lesser of (V
IN
+ 0.3V) or 6V
LV
OUT1
, LV
OUT2
to GND ..........0.3V to the Lesser of (LV
IN
+ 0.3V) or 6V
PGOOD to GND ............................................0.3V to 6V
LV
OUT1
, LV
OUT2
Short-Circuit
to GND Duration ...............................................Indefinite
Operating Junction Temperature Range
(Note 2) ..................................................40癈 to 125癈
Storage Temperature Range .................. 65癈 to 150癈
(Note 1)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW
ENBUCK
BUCKFB
ENLDO1
LV
FB1
LV
FB2
ENLDO2
MODESEL
V
IN
I
TH
PGOOD
LV
OUT1
LV
IN
LV
OUT2
TOP VIEW
DE PACKAGE
14-LEAD (4mm ?3mm) PLASTIC DFN
15
T
JMAX
= 125癈, ?/DIV>
JA
= 43癈/W
EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3446EDE#PBF
LTC3446EDE#TRPBF 3446
14-Lead (4mm ?3mm) Plastic DFN 40癈 to 125癈
LTC3446IDE#PBF
LTC3446IDE#TRPBF 3446
14-Lead (4mm ?3mm) Plastic DFN 40癈 to 125癈
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V
IN
Input Voltage Range
(Note 3)
?/DIV>
2.7
5.5
V
V
UVLO
V
IN
Undervoltage Lockout Threshold
V
IN
Undervoltage Lockout Hysteresis
V
IN
Rising
?/DIV>
2.37
10
2.5
30
V
mV
I
Q
V
IN
Quiescent Current (Note 4)
Buck Enabled Only, Not Sleeping
Buck Enabled Only, Sleeping
One LDO Enabled Only
All Three Outputs Enabled, Buck Not Sleeping
All Three Outputs Enabled, Buck Sleeping
Shutdown
V
BUCKFB
= 0V, I
SW
= 0mA
V
BUCKFB
= 1V, I
SW
= 0mA
V
LVIN
= 1.5V, 10礎 LDO Output Load
V
BUCKFB
= 0V, I
SW
= 0mA, V
LVIN
= 1.5V,
10礎 Output Load on Each LDO
V
BUCKFB
= 1V, I
SW
= 0mA, V
LVIN
= 1.5V,
10礎 Load on Each LDO
V
ENBUCK
= 0V, V
ENLDO1
= 0V, V
ENLDO2
= 0V
310
50
75
400
140
500
75
100
600
210
1
礎
礎
礎
礎
礎
礎
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25癈. V
IN
= 3.6V unless otherwise specified. (Note 2)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3446IDE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
| LTC3447 | 制造商:LINER 制造商全称:Linear Technology 功能描述:I2C Controllable Buck Regulator in 3mm × 3mm DFN |
| LTC3447EDD | 功能描述:IC REG BUCK SYNC ADJ 0.6A 10DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC3447EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3447EDD#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 10-Pin DFN EP T/R |
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