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参数资料
| 型号： | LTC3445EUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 475K |
| 描述： | IC REG TRPL BUCK/LINEAR 24-QFN |
| 标准包装： | 91 |
| 拓扑： | 降压（降压）（1），线性（LDO）（2） |
| 功能： | 任何功能 |
| 输出数： | 3 |
| 频率 - 开关： | 1.5MHz |
| 电压/电流 - 输出 1： | 0.85 V ~ 1.55 V，600mA |
| 电压/电流 - 输出 2： | 可调至0.6V，50mA |
| 电压/电流 - 输出 3： | 可调至0.6V，50mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
2
LTC3445
3445fa
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
ORDER PART NUMBER
(Note 1)
ABSOLUTE AXI U RATI GS W
W
U
PACKAGE/ORDER I FOR ATIO
U
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3445EUF
T
JMAX
= 125癈, ?/DIV>
JA
= 37癈/W, ?/DIV>
JC
= 2.6癈/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
24
23
22
21
20
19
7
8
9
TOP VIEW
25
UF PACKAGE
24-LEAD (4mm ?4mm) PLASTIC QFN
10
11
12
6
5
4
3
2
1
13
14
15
16
17
18
V
TRACK
V
BACKUP
V
CC1
PGOOD
ADD7
SDA
V
CC
BATT
FB
NC
RUN
SW
NC
The ?/SPAN> denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25?/SPAN>C. V
CC1
= V
CC2
= 3.6V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
UF PART MARKING
3445
V
CC1
, V
CC2
, SDA, SCL Voltages.................. 0.3V to 6V
RUN, V
TRACK
, V
BACKUP
, PGOOD, ADD7,
ADD6, FB, V
CC
BATT,
BATTFAULT Voltages.............................. 0.3V to V
CC1
SW Voltage................................ 0.3V to (V
CC1
+ 0.3V)
LDO1FB, LDO2FB Voltages..................... 0.3V to V
CC2
LDO1, LDO2 Voltages................ 0.3V to (V
CC2
+ 0.3V)
LDO1, LDO2 Source Current............................... 50mA
V
CC
BATT Source Current...................................... 8mA
P-Channel Switch Source Current (DC)............. 800mA
N-Channel Switch Sink Current (DC)................. 800mA
Peak SW Sink and Source Current........................ 1.3A
LDO1, LDO2, V
CC
BATT Output Short-Circuit
Duration.......................................................... Indefinite
Operating Temperature Range (Note 2)...40癈 to 85癈
Junction Temperature (Note 3)............................ 125癈
Storage Temperature Range................. 65癈 to 125癈
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V
CC1,
V
CC2
Input Voltage Range
?SPAN class="pst LTC3445EUF-TRPBF_2465416_4"> 2.5
5.5
V
RUN
Run Threshold
?SPAN class="pst LTC3445EUF-TRPBF_2465416_4"> 0.3 1 1.5
V
PGOOD Reports Undervoltage of any Regulator
PGOOD = 0.4V
?SPAN class="pst LTC3445EUF-TRPBF_2465416_4"> 3
mA
I
S
DC Bias Current (Shutdown)
RUN = 0
27 50
礎
DC Bias Current (Buck, LDO1, LDO2 Disabled) RUN = V
CC1
105 150
礎
Buck Regulator
R
FB
Feedback Resistance
340
k&
V
OUT(MIN)
Regulated Output Voltage
I
OUT
= 100mA, Burst Mode Operation ?/SPAN> 0.824 0.850 0.875
V
Disabled
V
OUT(MAX)
Regulated Output Voltage
I
OUT
= 100mA, Burst Mode Operation ?/SPAN> 1.504 1.55 1.597
V
Disabled
V
OUT(STEP)
Output Voltage Step Size (0 to 48)
I
OUT
= 100mA
?SPAN class="pst LTC3445EUF-TRPBF_2465416_4"> 13.1 14.7 16.1
mV
Output Voltage Slew Rate = 00
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
11.3
mV/祍
Output Voltage Slew Rate = 01
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
7.5
mV/祍
Output Voltage Slew Rate = 10
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
3.8
mV/祍
Output Voltage Slew Rate = 11
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
0.9
mV/祍
I
PK
Peak Inductor Current
V
CC1
= 3V, V
FB
= 0.5V or V
OUT
= 90%,
0.75 1 1.25
A
Duty Cycle < 35%
V
LOADREG
Output Voltage Load Regulation
0.5
%
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3446 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
| LTC3446EDE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
| LTC3446EDE#PBF | 功能描述:IC REG TRPL BCK/LINEAR 14-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LTC3446EDE#TRPBF | 功能描述:IC REG TRPL BCK/LINEAR 14-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LTC3446EDE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators |
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